Merge pull request #2088 from vitorpamplona/claude/review-call-permissions-utwfD

Add group call support with participant management

amethyst/src/main/AndroidManifest.xml

@@ -14,8 +14,9 @@
     </queries>
 
 
-    <!-- Doesn't require a camera -->
+    <!-- Doesn't require a camera or microphone -->
     <uses-feature android:name="android.hardware.camera" android:required="false" />
+    <uses-feature android:name="android.hardware.microphone" android:required="false" />
 
     <!-- To connect with relays -->
     <uses-permission android:name="android.permission.INTERNET"/>
@@ -40,10 +41,13 @@
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE_MEDIA_PLAYBACK" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE_MICROPHONE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_CAMERA" />
     <uses-permission android:name="android.permission.USE_FULL_SCREEN_INTENT" />
 
     <!-- Phone calls -->
     <uses-permission android:name="android.permission.VIBRATE"/>
+    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
+    <uses-permission android:name="android.permission.BLUETOOTH" android:maxSdkVersion="30" />
     <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
 
     <!-- Keeps screen on while playing videos -->
@@ -243,7 +247,7 @@
 
         <service
             android:name=".service.call.CallForegroundService"
-            android:foregroundServiceType="microphone"
+            android:foregroundServiceType="microphone|camera"
             android:stopWithTask="true"
             android:exported="false" />
 

amethyst/src/main/java/com/vitorpamplona/amethyst/service/call/CallAudioManager.kt

@@ -20,10 +20,12 @@
  */
 package com.vitorpamplona.amethyst.service.call
 
+import android.Manifest
 import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
 import android.content.IntentFilter
+import android.content.pm.PackageManager
 import android.hardware.Sensor
 import android.hardware.SensorEvent
 import android.hardware.SensorEventListener
@@ -39,6 +41,7 @@ import android.os.PowerManager
 import android.os.VibrationEffect
 import android.os.Vibrator
 import android.os.VibratorManager
+import androidx.core.content.ContextCompat
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
@@ -63,6 +66,14 @@ class CallAudioManager(
     private val _audioRoute = MutableStateFlow(AudioRoute.EARPIECE)
     val audioRoute: StateFlow<AudioRoute> = _audioRoute.asStateFlow()
 
+    private fun hasBluetoothPermission(): Boolean =
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+            ContextCompat.checkSelfPermission(context, Manifest.permission.BLUETOOTH_CONNECT) ==
+                PackageManager.PERMISSION_GRANTED
+        } else {
+            true
+        }
+
     private val _isBluetoothAvailable = MutableStateFlow(false)
     val isBluetoothAvailable: StateFlow<Boolean> = _isBluetoothAvailable.asStateFlow()
 
@@ -115,6 +126,7 @@ class CallAudioManager(
         previousAudioMode = audioManager.mode
         audioManager.mode = AudioManager.MODE_IN_COMMUNICATION
 
+        if (hasBluetoothPermission()) {
             _isBluetoothAvailable.value = hasBluetoothDevice()
             if (_isBluetoothAvailable.value) {
                 startBluetoothSco()
@@ -122,6 +134,10 @@ class CallAudioManager(
                 routeToEarpiece()
             }
             registerBluetoothScoReceiver()
+        } else {
+            _isBluetoothAvailable.value = false
+            routeToEarpiece()
+        }
     }
 
     fun restoreAudioMode() {
@@ -220,6 +236,7 @@ class CallAudioManager(
     }
 
     private fun routeToBluetooth() {
+        if (!hasBluetoothPermission()) return
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
             val btDevice =
                 audioManager

amethyst/src/main/java/com/vitorpamplona/amethyst/service/call/CallController.kt

@@ -117,7 +117,7 @@ class CallController(
             callManager.state.collect { state ->
                 when (state) {
                     is CallState.IncomingCall -> {
-                        audioManager.startRinging()
+                        withContext(Dispatchers.IO) { audioManager.startRinging() }
                         showIncomingCallNotification(state.callerPubKey)
                     }
 
@@ -128,7 +128,7 @@ class CallController(
                     is CallState.Connecting -> {
                         audioManager.stopRinging()
                         audioManager.stopRingbackTone()
-                        audioManager.switchToCallAudioMode()
+                        withContext(Dispatchers.IO) { audioManager.switchToCallAudioMode() }
                         audioManager.acquireProximityWakeLock()
                         NotificationUtils.cancelCallNotification(context)
                     }
@@ -337,6 +337,17 @@ class CallController(
 
     fun getEglBase() = webRtcSession?.eglBase
 
+    fun invitePeer(peerPubKey: String) {
+        scope.launch {
+            val session = webRtcSession ?: return@launch
+            session.createOffer { sdp ->
+                scope.launch {
+                    callManager.invitePeer(peerPubKey, sdp.description)
+                }
+            }
+        }
+    }
+
     fun hangup() {
         scope.launch {
             callManager.hangup()
@@ -461,10 +472,12 @@ class CallController(
     private fun startForegroundService() {
         try {
             val peerName = callManager.currentPeerPubKey() ?: ""
+            val isVideo = _isVideoEnabled.value
             val intent =
                 Intent(context, CallForegroundService::class.java).apply {
                     action = CallForegroundService.ACTION_START
                     putExtra(CallForegroundService.EXTRA_PEER_NAME, peerName)
+                    putExtra(CallForegroundService.EXTRA_IS_VIDEO, isVideo)
                 }
             context.startForegroundService(intent)
         } catch (e: Exception) {

amethyst/src/main/java/com/vitorpamplona/amethyst/service/call/CallForegroundService.kt

@@ -45,6 +45,7 @@ class CallForegroundService : Service() {
         const val ACTION_START = "com.vitorpamplona.amethyst.CALL_START"
         const val ACTION_STOP = "com.vitorpamplona.amethyst.CALL_STOP"
         const val EXTRA_PEER_NAME = "peer_name"
+        const val EXTRA_IS_VIDEO = "is_video"
     }
 
     override fun onBind(intent: Intent?): IBinder? = null
@@ -62,14 +63,25 @@ class CallForegroundService : Service() {
         when (intent?.action) {
             ACTION_START -> {
                 val peerName = intent.getStringExtra(EXTRA_PEER_NAME) ?: "Unknown"
+                val isVideo = intent.getBooleanExtra(EXTRA_IS_VIDEO, false)
                 val notification = buildNotification(peerName)
                 val hasAudioPermission =
                     ContextCompat.checkSelfPermission(this, Manifest.permission.RECORD_AUDIO) ==
                         PackageManager.PERMISSION_GRANTED
+                val hasCameraPermission =
+                    ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) ==
+                        PackageManager.PERMISSION_GRANTED
                 try {
                     val fgsType =
-                        if (hasAudioPermission && Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE) {
+                        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE) {
-                            ServiceInfo.FOREGROUND_SERVICE_TYPE_MICROPHONE
+                            var type = 0
+                            if (hasAudioPermission) {
+                                type = type or ServiceInfo.FOREGROUND_SERVICE_TYPE_MICROPHONE
+                            }
+                            if (isVideo && hasCameraPermission) {
+                                type = type or ServiceInfo.FOREGROUND_SERVICE_TYPE_CAMERA
+                            }
+                            type
                         } else {
                             0
                         }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/call/CallPermissions.kt

@@ -23,6 +23,7 @@ package com.vitorpamplona.amethyst.ui.call
 import android.Manifest
 import android.content.Context
 import android.content.pm.PackageManager
+import android.os.Build
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.runtime.Composable
@@ -43,30 +44,42 @@ fun hasCallPermissions(
     return true
 }
 
+fun buildCallPermissions(isVideo: Boolean): Array<String> {
+    val permissions = mutableListOf(Manifest.permission.RECORD_AUDIO)
+    if (isVideo) {
+        permissions.add(Manifest.permission.CAMERA)
+    }
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+        permissions.add(Manifest.permission.BLUETOOTH_CONNECT)
+    }
+    return permissions.toTypedArray()
+}
+
 @Composable
 fun rememberCallWithPermission(
     context: Context,
     isVideo: Boolean = false,
     onCall: () -> Unit,
 ): () -> Unit {
-    val permissions =
+    val permissions = remember(isVideo) { buildCallPermissions(isVideo) }
-        if (isVideo) {
-            arrayOf(Manifest.permission.RECORD_AUDIO, Manifest.permission.CAMERA)
-        } else {
-            arrayOf(Manifest.permission.RECORD_AUDIO)
-        }
 
     val launcher =
         rememberLauncherForActivityResult(
             ActivityResultContracts.RequestMultiplePermissions(),
         ) { results ->
-            val allGranted = results.values.all { it }
+            // Bluetooth is optional — proceed if core permissions are granted
-            if (allGranted) onCall()
+            if (hasCallPermissions(context, isVideo)) onCall()
         }
 
     return remember(onCall, isVideo) {
         {
             if (hasCallPermissions(context, isVideo)) {
+                // Core permissions granted; still request BT if missing
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S &&
+                    !hasPermission(context, Manifest.permission.BLUETOOTH_CONNECT)
+                ) {
+                    launcher.launch(arrayOf(Manifest.permission.BLUETOOTH_CONNECT))
+                }
                 onCall()
             } else {
                 launcher.launch(permissions)

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/call/CallScreen.kt

@@ -44,22 +44,27 @@ import androidx.compose.material.icons.filled.Call
 import androidx.compose.material.icons.filled.CallEnd
 import androidx.compose.material.icons.filled.Mic
 import androidx.compose.material.icons.filled.MicOff
+import androidx.compose.material.icons.filled.PersonAdd
 import androidx.compose.material.icons.filled.Videocam
 import androidx.compose.material.icons.filled.VideocamOff
 import androidx.compose.material.icons.filled.VolumeOff
 import androidx.compose.material.icons.filled.VolumeUp
+import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.FloatingActionButton
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Snackbar
 import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableLongStateOf
+import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.setValue
@@ -68,6 +73,8 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import androidx.compose.ui.viewinterop.AndroidView
@@ -76,8 +83,11 @@ import com.vitorpamplona.amethyst.commons.call.CallManager
 import com.vitorpamplona.amethyst.commons.call.CallState
 import com.vitorpamplona.amethyst.service.call.AudioRoute
 import com.vitorpamplona.amethyst.service.call.CallController
+import com.vitorpamplona.amethyst.ui.note.BaseUserPicture
 import com.vitorpamplona.amethyst.ui.note.ClickableUserPicture
 import com.vitorpamplona.amethyst.ui.note.UsernameDisplay
+import com.vitorpamplona.amethyst.ui.note.creators.userSuggestions.ShowUserSuggestionList
+import com.vitorpamplona.amethyst.ui.note.creators.userSuggestions.UserSuggestionState
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.chats.rooms.LoadUser
 import com.vitorpamplona.amethyst.ui.stringRes
@@ -123,10 +133,10 @@ fun CallScreen(
 
             is CallState.Offering -> {
                 if (isInPipMode) {
-                    PipCallUI(peerPubKey = state.peerPubKeys.first(), statusText = stringRes(R.string.call_calling), accountViewModel = accountViewModel)
+                    PipCallUI(peerPubKeys = state.peerPubKeys, statusText = stringRes(R.string.call_calling), accountViewModel = accountViewModel)
                 } else {
                     CallInProgressUI(
-                        peerPubKey = state.peerPubKeys.first(),
+                        peerPubKeys = state.peerPubKeys,
                         statusText = stringRes(R.string.call_calling),
                         accountViewModel = accountViewModel,
                         onHangup = { scope.launch { callManager.hangup() } },
@@ -136,7 +146,7 @@ fun CallScreen(
 
             is CallState.IncomingCall -> {
                 if (isInPipMode) {
-                    PipCallUI(callerPubKey = state.callerPubKey, statusText = stringRes(R.string.call_incoming), accountViewModel = accountViewModel)
+                    PipCallUI(peerPubKeys = state.groupMembers, statusText = stringRes(R.string.call_incoming), accountViewModel = accountViewModel)
                 } else {
                     val isVideoCall = state.callType == com.vitorpamplona.quartz.nipACWebRtcCalls.tags.CallType.VIDEO
                     val acceptWithPermission =
@@ -144,7 +154,7 @@ fun CallScreen(
                             callController?.acceptIncomingCall(state.sdpOffer)
                         }
                     IncomingCallUI(
-                        callerPubKey = state.callerPubKey,
+                        groupMembers = state.groupMembers,
                         callType = state.callType,
                         accountViewModel = accountViewModel,
                         onAccept = acceptWithPermission,
@@ -155,10 +165,10 @@ fun CallScreen(
 
             is CallState.Connecting -> {
                 if (isInPipMode) {
-                    PipCallUI(peerPubKey = state.peerPubKeys.first(), statusText = stringRes(R.string.call_connecting), accountViewModel = accountViewModel)
+                    PipCallUI(peerPubKeys = state.peerPubKeys, statusText = stringRes(R.string.call_connecting), accountViewModel = accountViewModel)
                 } else {
                     CallInProgressUI(
-                        peerPubKey = state.peerPubKeys.first(),
+                        peerPubKeys = state.peerPubKeys,
                         statusText = stringRes(R.string.call_connecting),
                         accountViewModel = accountViewModel,
                         onHangup = { scope.launch { callManager.hangup() } },
@@ -178,6 +188,7 @@ fun CallScreen(
                         onToggleMute = { callController?.toggleAudioMute() },
                         onToggleVideo = { callController?.toggleVideo() },
                         onCycleAudioRoute = { callController?.cycleAudioRoute() },
+                        onInvitePeer = { peerPubKey -> callController?.invitePeer(peerPubKey) },
                     )
                 }
             }
@@ -185,7 +196,7 @@ fun CallScreen(
             is CallState.Ended -> {
                 if (!isInPipMode) {
                     CallInProgressUI(
-                        peerPubKey = state.peerPubKeys.first(),
+                        peerPubKeys = state.peerPubKeys,
                         statusText = stringRes(R.string.call_ended),
                         accountViewModel = accountViewModel,
                         onHangup = { onCallEnded() },
@@ -220,7 +231,7 @@ fun CallScreen(
 
 @Composable
 private fun CallInProgressUI(
-    peerPubKey: String,
+    peerPubKeys: Set<String>,
     statusText: String,
     accountViewModel: AccountViewModel,
     onHangup: () -> Unit,
@@ -238,21 +249,16 @@ private fun CallInProgressUI(
             horizontalAlignment = Alignment.CenterHorizontally,
             verticalArrangement = Arrangement.Center,
         ) {
-            LoadUser(baseUserHex = peerPubKey, accountViewModel = accountViewModel) { user ->
+            GroupCallPictures(
-                if (user != null) {
+                peerPubKeys = peerPubKeys,
-                    ClickableUserPicture(
-                        baseUser = user,
                 size = 120.dp,
                 accountViewModel = accountViewModel,
             )
             Spacer(modifier = Modifier.height(16.dp))
-                    UsernameDisplay(
+            GroupCallNames(
-                        baseUser = user,
+                peerPubKeys = peerPubKeys,
                 accountViewModel = accountViewModel,
-                        fontWeight = FontWeight.Bold,
             )
-                }
-            }
             Spacer(modifier = Modifier.height(8.dp))
             Text(
                 text = statusText,
@@ -279,7 +285,7 @@ private fun CallInProgressUI(
 
 @Composable
 private fun IncomingCallUI(
-    callerPubKey: String,
+    groupMembers: Set<String>,
     callType: com.vitorpamplona.quartz.nipACWebRtcCalls.tags.CallType,
     accountViewModel: AccountViewModel,
     onAccept: () -> Unit,
@@ -298,21 +304,16 @@ private fun IncomingCallUI(
             horizontalAlignment = Alignment.CenterHorizontally,
             verticalArrangement = Arrangement.Center,
         ) {
-            LoadUser(baseUserHex = callerPubKey, accountViewModel = accountViewModel) { user ->
+            GroupCallPictures(
-                if (user != null) {
+                peerPubKeys = groupMembers,
-                    ClickableUserPicture(
-                        baseUser = user,
                 size = 120.dp,
                 accountViewModel = accountViewModel,
             )
             Spacer(modifier = Modifier.height(16.dp))
-                    UsernameDisplay(
+            GroupCallNames(
-                        baseUser = user,
+                peerPubKeys = groupMembers,
                 accountViewModel = accountViewModel,
-                        fontWeight = FontWeight.Bold,
             )
-                }
-            }
             Spacer(modifier = Modifier.height(8.dp))
             Text(
                 text =
@@ -370,6 +371,7 @@ private fun ConnectedCallUI(
     onToggleMute: () -> Unit,
     onToggleVideo: () -> Unit,
     onCycleAudioRoute: () -> Unit,
+    onInvitePeer: (String) -> Unit = {},
 ) {
     var elapsed by remember { mutableLongStateOf(0L) }
 
@@ -391,6 +393,20 @@ private fun ConnectedCallUI(
     val isVideoEnabled by (callController?.isVideoEnabled ?: defaultTrue).collectAsState()
     val currentAudioRoute by (callController?.audioRoute ?: defaultRoute).collectAsState()
 
+    var showAddParticipant by remember { mutableStateOf(false) }
+
+    if (showAddParticipant) {
+        AddParticipantDialog(
+            accountViewModel = accountViewModel,
+            existingPeers = state.allPeerPubKeys,
+            onInvite = { peerPubKey ->
+                onInvitePeer(peerPubKey)
+                showAddParticipant = false
+            },
+            onDismiss = { showAddParticipant = false },
+        )
+    }
+
     Box(
         modifier =
             Modifier
@@ -433,28 +449,31 @@ private fun ConnectedCallUI(
                 horizontalAlignment = Alignment.CenterHorizontally,
                 verticalArrangement = Arrangement.Center,
             ) {
-                LoadUser(baseUserHex = state.peerPubKeys.first(), accountViewModel = accountViewModel) { user ->
+                GroupCallPictures(
-                    if (user != null) {
+                    peerPubKeys = state.allPeerPubKeys,
-                        ClickableUserPicture(
-                            baseUser = user,
                     size = 120.dp,
                     accountViewModel = accountViewModel,
                 )
                 Spacer(modifier = Modifier.height(16.dp))
-                        UsernameDisplay(
+                GroupCallNames(
-                            baseUser = user,
+                    peerPubKeys = state.allPeerPubKeys,
                     accountViewModel = accountViewModel,
-                            fontWeight = FontWeight.Bold,
                     textColor = Color.White,
                 )
-                    }
-                }
                 Spacer(modifier = Modifier.height(8.dp))
                 Text(
                     text = formatDuration(elapsed),
                     color = Color.White.copy(alpha = 0.7f),
                     fontSize = 16.sp,
                 )
+                if (state.pendingPeerPubKeys.isNotEmpty()) {
+                    Spacer(modifier = Modifier.height(4.dp))
+                    Text(
+                        text = stringRes(R.string.call_waiting_for_others),
+                        color = Color.White.copy(alpha = 0.5f),
+                        fontSize = 13.sp,
+                    )
+                }
             }
         } else {
             // Timer overlay
@@ -533,6 +552,17 @@ private fun ConnectedCallUI(
                         modifier = Modifier.size(28.dp),
                     )
                 }
+                IconButton(
+                    onClick = { showAddParticipant = true },
+                    modifier = Modifier.size(56.dp),
+                ) {
+                    Icon(
+                        imageVector = Icons.Default.PersonAdd,
+                        contentDescription = stringRes(R.string.call_add_participant),
+                        tint = Color.White,
+                        modifier = Modifier.size(28.dp),
+                    )
+                }
             }
             Spacer(modifier = Modifier.height(24.dp))
             FloatingActionButton(
@@ -584,12 +614,10 @@ private fun formatDuration(seconds: Long): String {
 
 @Composable
 private fun PipCallUI(
-    peerPubKey: String = "",
+    peerPubKeys: Set<String>,
-    callerPubKey: String = "",
     statusText: String,
     accountViewModel: AccountViewModel,
 ) {
-    val pubKey = peerPubKey.ifEmpty { callerPubKey }
     Box(
         modifier =
             Modifier
@@ -601,15 +629,11 @@ private fun PipCallUI(
             horizontalAlignment = Alignment.CenterHorizontally,
             verticalArrangement = Arrangement.Center,
         ) {
-            LoadUser(baseUserHex = pubKey, accountViewModel = accountViewModel) { user ->
+            GroupCallPictures(
-                if (user != null) {
+                peerPubKeys = peerPubKeys,
-                    ClickableUserPicture(
-                        baseUser = user,
                 size = 48.dp,
                 accountViewModel = accountViewModel,
             )
-                }
-            }
             Spacer(modifier = Modifier.height(4.dp))
             Text(
                 text = statusText,
@@ -665,15 +689,11 @@ private fun PipConnectedCallUI(
                 horizontalAlignment = Alignment.CenterHorizontally,
                 verticalArrangement = Arrangement.Center,
             ) {
-                LoadUser(baseUserHex = state.peerPubKeys.first(), accountViewModel = accountViewModel) { user ->
+                GroupCallPictures(
-                    if (user != null) {
+                    peerPubKeys = state.allPeerPubKeys,
-                        ClickableUserPicture(
-                            baseUser = user,
                     size = 48.dp,
                     accountViewModel = accountViewModel,
                 )
-                    }
-                }
                 Spacer(modifier = Modifier.height(4.dp))
                 Text(
                     text = formatDuration(elapsed),
@@ -696,6 +716,238 @@ private fun PipConnectedCallUI(
     }
 }
 
+@Composable
+private fun AddParticipantDialog(
+    accountViewModel: AccountViewModel,
+    existingPeers: Set<String>,
+    onInvite: (String) -> Unit,
+    onDismiss: () -> Unit,
+) {
+    val userSuggestions =
+        remember {
+            UserSuggestionState(accountViewModel.account, accountViewModel.nip05ClientBuilder())
+        }
+    var searchText by remember { mutableStateOf("") }
+
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text(stringRes(R.string.call_add_participant)) },
+        text = {
+            Column {
+                OutlinedTextField(
+                    value = searchText,
+                    onValueChange = {
+                        searchText = it
+                        userSuggestions.processCurrentWord(it)
+                    },
+                    label = { Text(stringRes(R.string.call_search_users)) },
+                    singleLine = true,
+                    modifier = Modifier.fillMaxWidth(),
+                )
+                Spacer(modifier = Modifier.height(8.dp))
+                Box(modifier = Modifier.height(300.dp)) {
+                    ShowUserSuggestionList(
+                        userSuggestions = userSuggestions,
+                        onSelect = { user ->
+                            if (user.pubkeyHex !in existingPeers) {
+                                onInvite(user.pubkeyHex)
+                            }
+                        },
+                        accountViewModel = accountViewModel,
+                    )
+                }
+            }
+        },
+        confirmButton = {},
+        dismissButton = {
+            TextButton(onClick = onDismiss) {
+                Text(stringRes(R.string.call_dismiss))
+            }
+        },
+    )
+}
+
+@Composable
+private fun GroupCallPictures(
+    peerPubKeys: Set<String>,
+    size: Dp,
+    accountViewModel: AccountViewModel,
+) {
+    val userList = remember(peerPubKeys) { peerPubKeys.toList() }
+    val displayCount = minOf(userList.size, 4)
+    val remaining = userList.size - displayCount
+
+    when (userList.size) {
+        0 -> {}
+
+        1 -> {
+            LoadUser(baseUserHex = userList[0], accountViewModel = accountViewModel) { user ->
+                if (user != null) {
+                    ClickableUserPicture(
+                        baseUser = user,
+                        size = size,
+                        accountViewModel = accountViewModel,
+                    )
+                }
+            }
+        }
+
+        else -> {
+            Box(Modifier.size(size), contentAlignment = Alignment.TopEnd) {
+                when (displayCount) {
+                    2 -> {
+                        BaseUserPicture(
+                            baseUserHex = userList[0],
+                            size = size.div(1.5f),
+                            accountViewModel = accountViewModel,
+                            outerModifier = Modifier.size(size.div(1.5f)).align(Alignment.CenterStart),
+                        )
+                        BaseUserPicture(
+                            baseUserHex = userList[1],
+                            size = size.div(1.5f),
+                            accountViewModel = accountViewModel,
+                            outerModifier = Modifier.size(size.div(1.5f)).align(Alignment.CenterEnd),
+                        )
+                    }
+
+                    3 -> {
+                        BaseUserPicture(
+                            baseUserHex = userList[0],
+                            size = size.div(1.8f),
+                            accountViewModel = accountViewModel,
+                            outerModifier = Modifier.size(size.div(1.8f)).align(Alignment.BottomStart),
+                        )
+                        BaseUserPicture(
+                            baseUserHex = userList[1],
+                            size = size.div(1.8f),
+                            accountViewModel = accountViewModel,
+                            outerModifier = Modifier.size(size.div(1.8f)).align(Alignment.TopCenter),
+                        )
+                        BaseUserPicture(
+                            baseUserHex = userList[2],
+                            size = size.div(1.8f),
+                            accountViewModel = accountViewModel,
+                            outerModifier = Modifier.size(size.div(1.8f)).align(Alignment.BottomEnd),
+                        )
+                    }
+
+                    else -> {
+                        BaseUserPicture(
+                            baseUserHex = userList[0],
+                            size = size.div(2f),
+                            accountViewModel = accountViewModel,
+                            outerModifier = Modifier.size(size.div(2f)).align(Alignment.BottomStart),
+                        )
+                        BaseUserPicture(
+                            baseUserHex = userList[1],
+                            size = size.div(2f),
+                            accountViewModel = accountViewModel,
+                            outerModifier = Modifier.size(size.div(2f)).align(Alignment.TopStart),
+                        )
+                        BaseUserPicture(
+                            baseUserHex = userList[2],
+                            size = size.div(2f),
+                            accountViewModel = accountViewModel,
+                            outerModifier = Modifier.size(size.div(2f)).align(Alignment.BottomEnd),
+                        )
+                        if (remaining > 0) {
+                            Box(
+                                modifier =
+                                    Modifier
+                                        .size(size.div(2f))
+                                        .align(Alignment.TopEnd)
+                                        .background(
+                                            MaterialTheme.colorScheme.surfaceVariant,
+                                            CircleShape,
+                                        ),
+                                contentAlignment = Alignment.Center,
+                            ) {
+                                Text(
+                                    text = "+$remaining",
+                                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                                    fontSize = (size.value / 5).sp,
+                                    fontWeight = FontWeight.Bold,
+                                )
+                            }
+                        } else {
+                            BaseUserPicture(
+                                baseUserHex = userList[3],
+                                size = size.div(2f),
+                                accountViewModel = accountViewModel,
+                                outerModifier = Modifier.size(size.div(2f)).align(Alignment.TopEnd),
+                            )
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun GroupCallNames(
+    peerPubKeys: Set<String>,
+    accountViewModel: AccountViewModel,
+    textColor: Color = Color.Unspecified,
+) {
+    val userList = remember(peerPubKeys) { peerPubKeys.toList() }
+
+    when (userList.size) {
+        0 -> {}
+
+        1 -> {
+            LoadUser(baseUserHex = userList[0], accountViewModel = accountViewModel) { user ->
+                if (user != null) {
+                    UsernameDisplay(
+                        baseUser = user,
+                        accountViewModel = accountViewModel,
+                        fontWeight = FontWeight.Bold,
+                        textColor = textColor,
+                    )
+                }
+            }
+        }
+
+        else -> {
+            val displayCount = minOf(userList.size, 2)
+            val remaining = userList.size - displayCount
+
+            Row(
+                horizontalArrangement = Arrangement.Center,
+                verticalAlignment = Alignment.CenterVertically,
+            ) {
+                for (i in 0 until displayCount) {
+                    if (i > 0) {
+                        Text(
+                            text = ", ",
+                            fontWeight = FontWeight.Bold,
+                            color = textColor,
+                        )
+                    }
+                    LoadUser(baseUserHex = userList[i], accountViewModel = accountViewModel) { user ->
+                        if (user != null) {
+                            UsernameDisplay(
+                                baseUser = user,
+                                accountViewModel = accountViewModel,
+                                fontWeight = FontWeight.Bold,
+                                textColor = textColor,
+                            )
+                        }
+                    }
+                }
+                if (remaining > 0) {
+                    Text(
+                        text = " +$remaining",
+                        fontWeight = FontWeight.Bold,
+                        color = textColor,
+                        textAlign = TextAlign.Center,
+                    )
+                }
+            }
+        }
+    }
+}
+
 @Composable
 private fun KeepScreenOn() {
     val context = LocalContext.current

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/call/CallScreenPreviews.kt

@@ -33,11 +33,13 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.BluetoothAudio
 import androidx.compose.material.icons.filled.Call
 import androidx.compose.material.icons.filled.CallEnd
 import androidx.compose.material.icons.filled.Mic
 import androidx.compose.material.icons.filled.MicOff
 import androidx.compose.material.icons.filled.Person
+import androidx.compose.material.icons.filled.PersonAdd
 import androidx.compose.material.icons.filled.Videocam
 import androidx.compose.material.icons.filled.VideocamOff
 import androidx.compose.material.icons.filled.VolumeOff
@@ -57,8 +59,142 @@ import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import com.vitorpamplona.amethyst.ui.theme.ThemeComparisonColumn
 
+// ---- Shared building blocks for previews ----
+
 @Composable
-private fun PreviewCallInProgress(statusText: String) {
+private fun PreviewAvatar(
+    modifier: Modifier = Modifier,
+    tint: Color = MaterialTheme.colorScheme.onSurfaceVariant,
+) {
+    Icon(
+        Icons.Default.Person,
+        contentDescription = null,
+        modifier = modifier.size(120.dp),
+        tint = tint,
+    )
+}
+
+@Composable
+private fun PreviewGroupAvatars(
+    count: Int,
+    tint: Color = MaterialTheme.colorScheme.onSurfaceVariant,
+) {
+    val halfSize = 60.dp
+    Box(Modifier.size(120.dp)) {
+        repeat(minOf(count, 4)) { i ->
+            val alignment =
+                when (i) {
+                    0 -> Alignment.BottomStart
+                    1 -> Alignment.TopStart
+                    2 -> Alignment.BottomEnd
+                    else -> Alignment.TopEnd
+                }
+            if (i < 3 || count <= 4) {
+                Icon(
+                    Icons.Default.Person,
+                    contentDescription = null,
+                    modifier = Modifier.size(halfSize).align(alignment),
+                    tint = tint,
+                )
+            } else {
+                Box(
+                    modifier =
+                        Modifier
+                            .size(halfSize)
+                            .align(alignment)
+                            .background(
+                                MaterialTheme.colorScheme.surfaceVariant,
+                                CircleShape,
+                            ),
+                    contentAlignment = Alignment.Center,
+                ) {
+                    Text(
+                        text = "+${count - 3}",
+                        fontWeight = FontWeight.Bold,
+                        fontSize = 14.sp,
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun PreviewCallControls(
+    isMuted: Boolean = false,
+    isVideoEnabled: Boolean = false,
+    audioRoute: String = "earpiece",
+    showAddParticipant: Boolean = false,
+) {
+    Column(horizontalAlignment = Alignment.CenterHorizontally) {
+        Row(
+            modifier = Modifier.fillMaxWidth(),
+            horizontalArrangement = Arrangement.SpaceEvenly,
+        ) {
+            IconButton(onClick = {}, modifier = Modifier.size(56.dp)) {
+                Icon(
+                    imageVector = if (isMuted) Icons.Default.MicOff else Icons.Default.Mic,
+                    contentDescription = "Mute",
+                    tint = if (isMuted) Color.Red else Color.White,
+                    modifier = Modifier.size(28.dp),
+                )
+            }
+            IconButton(onClick = {}, modifier = Modifier.size(56.dp)) {
+                Icon(
+                    imageVector = if (isVideoEnabled) Icons.Default.Videocam else Icons.Default.VideocamOff,
+                    contentDescription = "Camera",
+                    tint = if (!isVideoEnabled) Color.Red else Color.White,
+                    modifier = Modifier.size(28.dp),
+                )
+            }
+            IconButton(onClick = {}, modifier = Modifier.size(56.dp)) {
+                Icon(
+                    imageVector =
+                        when (audioRoute) {
+                            "speaker" -> Icons.Default.VolumeUp
+                            "bluetooth" -> Icons.Default.BluetoothAudio
+                            else -> Icons.Default.VolumeOff
+                        },
+                    contentDescription = "Audio route",
+                    tint =
+                        when (audioRoute) {
+                            "speaker" -> Color.Cyan
+                            "bluetooth" -> Color(0xFF2196F3)
+                            else -> Color.White
+                        },
+                    modifier = Modifier.size(28.dp),
+                )
+            }
+            if (showAddParticipant) {
+                IconButton(onClick = {}, modifier = Modifier.size(56.dp)) {
+                    Icon(
+                        Icons.Default.PersonAdd,
+                        contentDescription = "Add participant",
+                        tint = Color.White,
+                        modifier = Modifier.size(28.dp),
+                    )
+                }
+            }
+        }
+        Spacer(modifier = Modifier.height(24.dp))
+        FloatingActionButton(
+            onClick = {},
+            containerColor = Color.Red,
+            shape = CircleShape,
+            modifier = Modifier.size(64.dp),
+        ) {
+            Icon(Icons.Default.CallEnd, "Hang up", tint = Color.White, modifier = Modifier.size(32.dp))
+        }
+    }
+}
+
+// ---- 1. Offering (Calling...) ----
+
+@Composable
+private fun PreviewCallInProgress(
+    name: String,
+    statusText: String,
+) {
     Box(
         modifier =
             Modifier
@@ -70,24 +206,11 @@ private fun PreviewCallInProgress(statusText: String) {
             horizontalAlignment = Alignment.CenterHorizontally,
             verticalArrangement = Arrangement.Center,
         ) {
-            Icon(
+            PreviewAvatar()
-                Icons.Default.Person,
-                contentDescription = null,
-                modifier = Modifier.size(120.dp),
-                tint = MaterialTheme.colorScheme.onSurfaceVariant,
-            )
             Spacer(modifier = Modifier.height(16.dp))
-            Text(
+            Text(text = name, fontWeight = FontWeight.Bold, fontSize = 20.sp)
-                text = "Alice",
-                fontWeight = FontWeight.Bold,
-                fontSize = 20.sp,
-            )
             Spacer(modifier = Modifier.height(8.dp))
-            Text(
+            Text(text = statusText, color = MaterialTheme.colorScheme.onSurfaceVariant, fontSize = 16.sp)
-                text = statusText,
-                color = MaterialTheme.colorScheme.onSurfaceVariant,
-                fontSize = 16.sp,
-            )
             Spacer(modifier = Modifier.height(48.dp))
             FloatingActionButton(
                 onClick = {},
@@ -95,12 +218,7 @@ private fun PreviewCallInProgress(statusText: String) {
                 shape = CircleShape,
                 modifier = Modifier.size(64.dp),
             ) {
-                Icon(
+                Icon(Icons.Default.CallEnd, "Hang up", tint = Color.White, modifier = Modifier.size(32.dp))
-                    Icons.Default.CallEnd,
-                    contentDescription = "Hang up",
-                    tint = Color.White,
-                    modifier = Modifier.size(32.dp),
-                )
             }
         }
     }
@@ -110,29 +228,15 @@ private fun PreviewCallInProgress(statusText: String) {
 @Composable
 fun PreviewCallingScreen() {
     ThemeComparisonColumn {
-        PreviewCallInProgress("Calling...")
+        PreviewCallInProgress("Alice", "Calling\u2026")
     }
 }
 
-@Preview(showBackground = true, widthDp = 360, heightDp = 640)
+// ---- 2. Offering group call ----
-@Composable
-fun PreviewConnectingScreen() {
-    ThemeComparisonColumn {
-        PreviewCallInProgress("Connecting...")
-    }
-}
 
 @Preview(showBackground = true, widthDp = 360, heightDp = 640)
 @Composable
-fun PreviewCallEndedScreen() {
+fun PreviewCallingGroupScreen() {
-    ThemeComparisonColumn {
-        PreviewCallInProgress("Call ended")
-    }
-}
-
-@Preview(showBackground = true, widthDp = 360, heightDp = 640)
-@Composable
-fun PreviewIncomingCallScreen() {
     ThemeComparisonColumn {
         Box(
             modifier =
@@ -145,53 +249,64 @@ fun PreviewIncomingCallScreen() {
                 horizontalAlignment = Alignment.CenterHorizontally,
                 verticalArrangement = Arrangement.Center,
             ) {
-                Icon(
+                PreviewGroupAvatars(3)
-                    Icons.Default.Person,
-                    contentDescription = null,
-                    modifier = Modifier.size(120.dp),
-                    tint = MaterialTheme.colorScheme.onSurfaceVariant,
-                )
                 Spacer(modifier = Modifier.height(16.dp))
-                Text(
+                Text("Alice, Bob +1", fontWeight = FontWeight.Bold, fontSize = 20.sp)
-                    text = "Bob",
-                    fontWeight = FontWeight.Bold,
-                    fontSize = 20.sp,
-                )
                 Spacer(modifier = Modifier.height(8.dp))
-                Text(
+                Text("Calling\u2026", color = MaterialTheme.colorScheme.onSurfaceVariant, fontSize = 16.sp)
-                    text = "Incoming voice call...",
-                    color = MaterialTheme.colorScheme.onSurfaceVariant,
-                    fontSize = 16.sp,
-                )
                 Spacer(modifier = Modifier.height(48.dp))
-                Row(
-                    horizontalArrangement = Arrangement.spacedBy(48.dp),
-                ) {
                 FloatingActionButton(
                     onClick = {},
                     containerColor = Color.Red,
                     shape = CircleShape,
                     modifier = Modifier.size(64.dp),
                 ) {
-                        Icon(
+                    Icon(Icons.Default.CallEnd, "Hang up", tint = Color.White, modifier = Modifier.size(32.dp))
-                            Icons.Default.CallEnd,
-                            contentDescription = "Reject",
-                            tint = Color.White,
-                            modifier = Modifier.size(32.dp),
-                        )
                 }
-                    FloatingActionButton(
+            }
-                        onClick = {},
+        }
-                        containerColor = Color(0xFF4CAF50),
+    }
-                        shape = CircleShape,
+}
-                        modifier = Modifier.size(64.dp),
+
+// ---- 3. Connecting ----
+
+@Preview(showBackground = true, widthDp = 360, heightDp = 640)
+@Composable
+fun PreviewConnectingScreen() {
+    ThemeComparisonColumn {
+        PreviewCallInProgress("Alice", "Connecting\u2026")
+    }
+}
+
+// ---- 4. Incoming voice call ----
+
+@Preview(showBackground = true, widthDp = 360, heightDp = 640)
+@Composable
+fun PreviewIncomingVoiceCallScreen() {
+    ThemeComparisonColumn {
+        Box(
+            modifier =
+                Modifier
+                    .fillMaxSize()
+                    .background(MaterialTheme.colorScheme.surface),
+            contentAlignment = Alignment.Center,
         ) {
-                        Icon(
+            Column(
-                            Icons.Default.Call,
+                horizontalAlignment = Alignment.CenterHorizontally,
-                            contentDescription = "Accept",
+                verticalArrangement = Arrangement.Center,
-                            tint = Color.White,
+            ) {
-                            modifier = Modifier.size(32.dp),
+                PreviewAvatar()
-                        )
+                Spacer(modifier = Modifier.height(16.dp))
+                Text("Bob", fontWeight = FontWeight.Bold, fontSize = 20.sp)
+                Spacer(modifier = Modifier.height(8.dp))
+                Text("Incoming voice call\u2026", color = MaterialTheme.colorScheme.onSurfaceVariant, fontSize = 16.sp)
+                Spacer(modifier = Modifier.height(48.dp))
+                Row(horizontalArrangement = Arrangement.spacedBy(48.dp)) {
+                    FloatingActionButton(onClick = {}, containerColor = Color.Red, shape = CircleShape, modifier = Modifier.size(64.dp)) {
+                        Icon(Icons.Default.CallEnd, "Reject", tint = Color.White, modifier = Modifier.size(32.dp))
+                    }
+                    FloatingActionButton(onClick = {}, containerColor = Color(0xFF4CAF50), shape = CircleShape, modifier = Modifier.size(64.dp)) {
+                        Icon(Icons.Default.Call, "Accept", tint = Color.White, modifier = Modifier.size(32.dp))
                     }
                 }
             }
@@ -199,6 +314,80 @@ fun PreviewIncomingCallScreen() {
     }
 }
 
+// ---- 5. Incoming video call ----
+
+@Preview(showBackground = true, widthDp = 360, heightDp = 640)
+@Composable
+fun PreviewIncomingVideoCallScreen() {
+    ThemeComparisonColumn {
+        Box(
+            modifier =
+                Modifier
+                    .fillMaxSize()
+                    .background(MaterialTheme.colorScheme.surface),
+            contentAlignment = Alignment.Center,
+        ) {
+            Column(
+                horizontalAlignment = Alignment.CenterHorizontally,
+                verticalArrangement = Arrangement.Center,
+            ) {
+                PreviewAvatar()
+                Spacer(modifier = Modifier.height(16.dp))
+                Text("Bob", fontWeight = FontWeight.Bold, fontSize = 20.sp)
+                Spacer(modifier = Modifier.height(8.dp))
+                Text("Incoming video call\u2026", color = MaterialTheme.colorScheme.onSurfaceVariant, fontSize = 16.sp)
+                Spacer(modifier = Modifier.height(48.dp))
+                Row(horizontalArrangement = Arrangement.spacedBy(48.dp)) {
+                    FloatingActionButton(onClick = {}, containerColor = Color.Red, shape = CircleShape, modifier = Modifier.size(64.dp)) {
+                        Icon(Icons.Default.CallEnd, "Reject", tint = Color.White, modifier = Modifier.size(32.dp))
+                    }
+                    FloatingActionButton(onClick = {}, containerColor = Color(0xFF4CAF50), shape = CircleShape, modifier = Modifier.size(64.dp)) {
+                        Icon(Icons.Default.Call, "Accept", tint = Color.White, modifier = Modifier.size(32.dp))
+                    }
+                }
+            }
+        }
+    }
+}
+
+// ---- 6. Incoming group call ----
+
+@Preview(showBackground = true, widthDp = 360, heightDp = 640)
+@Composable
+fun PreviewIncomingGroupCallScreen() {
+    ThemeComparisonColumn {
+        Box(
+            modifier =
+                Modifier
+                    .fillMaxSize()
+                    .background(MaterialTheme.colorScheme.surface),
+            contentAlignment = Alignment.Center,
+        ) {
+            Column(
+                horizontalAlignment = Alignment.CenterHorizontally,
+                verticalArrangement = Arrangement.Center,
+            ) {
+                PreviewGroupAvatars(4)
+                Spacer(modifier = Modifier.height(16.dp))
+                Text("Bob, Alice +2", fontWeight = FontWeight.Bold, fontSize = 20.sp)
+                Spacer(modifier = Modifier.height(8.dp))
+                Text("Incoming voice call\u2026", color = MaterialTheme.colorScheme.onSurfaceVariant, fontSize = 16.sp)
+                Spacer(modifier = Modifier.height(48.dp))
+                Row(horizontalArrangement = Arrangement.spacedBy(48.dp)) {
+                    FloatingActionButton(onClick = {}, containerColor = Color.Red, shape = CircleShape, modifier = Modifier.size(64.dp)) {
+                        Icon(Icons.Default.CallEnd, "Reject", tint = Color.White, modifier = Modifier.size(32.dp))
+                    }
+                    FloatingActionButton(onClick = {}, containerColor = Color(0xFF4CAF50), shape = CircleShape, modifier = Modifier.size(64.dp)) {
+                        Icon(Icons.Default.Call, "Accept", tint = Color.White, modifier = Modifier.size(32.dp))
+                    }
+                }
+            }
+        }
+    }
+}
+
+// ---- 7. Connected P2P voice call ----
+
 @Preview(showBackground = true, widthDp = 360, heightDp = 640)
 @Composable
 fun PreviewConnectedCallScreen() {
@@ -214,91 +403,25 @@ fun PreviewConnectedCallScreen() {
                 horizontalAlignment = Alignment.CenterHorizontally,
                 verticalArrangement = Arrangement.Center,
             ) {
-                Icon(
+                PreviewAvatar(tint = Color.White.copy(alpha = 0.5f))
-                    Icons.Default.Person,
-                    contentDescription = null,
-                    modifier = Modifier.size(120.dp),
-                    tint = Color.White.copy(alpha = 0.5f),
-                )
                 Spacer(modifier = Modifier.height(16.dp))
-                Text(
+                Text("Alice", fontWeight = FontWeight.Bold, fontSize = 20.sp, color = Color.White)
-                    text = "Alice",
-                    fontWeight = FontWeight.Bold,
-                    fontSize = 20.sp,
-                    color = Color.White,
-                )
                 Spacer(modifier = Modifier.height(8.dp))
-                Text(
+                Text("02:45", color = Color.White.copy(alpha = 0.7f), fontSize = 16.sp)
-                    text = "02:45",
-                    color = Color.White.copy(alpha = 0.7f),
-                    fontSize = 16.sp,
-                )
             }
 
             Column(
-                modifier =
+                modifier = Modifier.align(Alignment.BottomCenter).padding(bottom = 48.dp),
-                    Modifier
-                        .align(Alignment.BottomCenter)
-                        .padding(bottom = 48.dp),
                 horizontalAlignment = Alignment.CenterHorizontally,
             ) {
-                Row(
+                PreviewCallControls(showAddParticipant = true)
-                    modifier = Modifier.fillMaxWidth(),
-                    horizontalArrangement = Arrangement.SpaceEvenly,
-                ) {
-                    IconButton(
-                        onClick = {},
-                        modifier = Modifier.size(56.dp),
-                    ) {
-                        Icon(
-                            imageVector = Icons.Default.Mic,
-                            contentDescription = "Mute",
-                            tint = Color.White,
-                            modifier = Modifier.size(28.dp),
-                        )
-                    }
-                    IconButton(
-                        onClick = {},
-                        modifier = Modifier.size(56.dp),
-                    ) {
-                        Icon(
-                            imageVector = Icons.Default.VideocamOff,
-                            contentDescription = "Camera off",
-                            tint = Color.Red,
-                            modifier = Modifier.size(28.dp),
-                        )
-                    }
-                    IconButton(
-                        onClick = {},
-                        modifier = Modifier.size(56.dp),
-                    ) {
-                        Icon(
-                            imageVector = Icons.Default.VolumeOff,
-                            contentDescription = "Speaker",
-                            tint = Color.White,
-                            modifier = Modifier.size(28.dp),
-                        )
-                    }
-                }
-                Spacer(modifier = Modifier.height(24.dp))
-                FloatingActionButton(
-                    onClick = {},
-                    containerColor = Color.Red,
-                    shape = CircleShape,
-                    modifier = Modifier.size(64.dp),
-                ) {
-                    Icon(
-                        Icons.Default.CallEnd,
-                        contentDescription = "Hang up",
-                        tint = Color.White,
-                        modifier = Modifier.size(32.dp),
-                    )
-                }
             }
         }
     }
 }
 
+// ---- 8. Connected P2P muted + video + speaker ----
+
 @Preview(showBackground = true, widthDp = 360, heightDp = 640)
 @Composable
 fun PreviewConnectedCallMuted() {
@@ -314,12 +437,7 @@ fun PreviewConnectedCallMuted() {
                 horizontalAlignment = Alignment.CenterHorizontally,
                 verticalArrangement = Arrangement.Center,
             ) {
-                Icon(
+                PreviewAvatar(tint = Color.White.copy(alpha = 0.5f))
-                    Icons.Default.Person,
-                    contentDescription = null,
-                    modifier = Modifier.size(120.dp),
-                    tint = Color.White.copy(alpha = 0.5f),
-                )
                 Spacer(modifier = Modifier.height(16.dp))
                 Text("Alice", fontWeight = FontWeight.Bold, fontSize = 20.sp, color = Color.White)
                 Spacer(modifier = Modifier.height(8.dp))
@@ -327,36 +445,176 @@ fun PreviewConnectedCallMuted() {
             }
 
             Column(
-                modifier =
+                modifier = Modifier.align(Alignment.BottomCenter).padding(bottom = 48.dp),
-                    Modifier
-                        .align(Alignment.BottomCenter)
-                        .padding(bottom = 48.dp),
                 horizontalAlignment = Alignment.CenterHorizontally,
             ) {
-                Row(
+                PreviewCallControls(
-                    modifier = Modifier.fillMaxWidth(),
+                    isMuted = true,
-                    horizontalArrangement = Arrangement.SpaceEvenly,
+                    isVideoEnabled = true,
+                    audioRoute = "speaker",
+                    showAddParticipant = true,
+                )
+            }
+        }
+    }
+}
+
+// ---- 9. Connected group call with pending peers ----
+
+@Preview(showBackground = true, widthDp = 360, heightDp = 640)
+@Composable
+fun PreviewConnectedGroupCallWithPending() {
+    ThemeComparisonColumn {
+        Box(
+            modifier =
+                Modifier
+                    .fillMaxSize()
+                    .background(Color.Black),
         ) {
-                    IconButton(onClick = {}, modifier = Modifier.size(56.dp)) {
+            Column(
-                        Icon(Icons.Default.MicOff, "Unmute", tint = Color.Red, modifier = Modifier.size(28.dp))
+                modifier = Modifier.fillMaxSize(),
-                    }
+                horizontalAlignment = Alignment.CenterHorizontally,
-                    IconButton(onClick = {}, modifier = Modifier.size(56.dp)) {
+                verticalArrangement = Arrangement.Center,
-                        Icon(Icons.Default.Videocam, "Camera on", tint = Color.White, modifier = Modifier.size(28.dp))
-                    }
-                    IconButton(onClick = {}, modifier = Modifier.size(56.dp)) {
-                        Icon(Icons.Default.VolumeUp, "Earpiece", tint = Color.Cyan, modifier = Modifier.size(28.dp))
-                    }
-                }
-                Spacer(modifier = Modifier.height(24.dp))
-                FloatingActionButton(
-                    onClick = {},
-                    containerColor = Color.Red,
-                    shape = CircleShape,
-                    modifier = Modifier.size(64.dp),
             ) {
-                    Icon(Icons.Default.CallEnd, "Hang up", tint = Color.White, modifier = Modifier.size(32.dp))
+                PreviewGroupAvatars(3, tint = Color.White.copy(alpha = 0.5f))
+                Spacer(modifier = Modifier.height(16.dp))
+                Text("Alice, Bob +1", fontWeight = FontWeight.Bold, fontSize = 20.sp, color = Color.White)
+                Spacer(modifier = Modifier.height(8.dp))
+                Text("01:30", color = Color.White.copy(alpha = 0.7f), fontSize = 16.sp)
+                Spacer(modifier = Modifier.height(4.dp))
+                Text("Waiting for others to join\u2026", color = Color.White.copy(alpha = 0.5f), fontSize = 13.sp)
+            }
+
+            Column(
+                modifier = Modifier.align(Alignment.BottomCenter).padding(bottom = 48.dp),
+                horizontalAlignment = Alignment.CenterHorizontally,
+            ) {
+                PreviewCallControls(showAddParticipant = true)
             }
         }
     }
 }
+
+// ---- 10. Connected with Bluetooth audio ----
+
+@Preview(showBackground = true, widthDp = 360, heightDp = 640)
+@Composable
+fun PreviewConnectedCallBluetooth() {
+    ThemeComparisonColumn {
+        Box(
+            modifier =
+                Modifier
+                    .fillMaxSize()
+                    .background(Color.Black),
+        ) {
+            Column(
+                modifier = Modifier.fillMaxSize(),
+                horizontalAlignment = Alignment.CenterHorizontally,
+                verticalArrangement = Arrangement.Center,
+            ) {
+                PreviewAvatar(tint = Color.White.copy(alpha = 0.5f))
+                Spacer(modifier = Modifier.height(16.dp))
+                Text("Alice", fontWeight = FontWeight.Bold, fontSize = 20.sp, color = Color.White)
+                Spacer(modifier = Modifier.height(8.dp))
+                Text("10:03", color = Color.White.copy(alpha = 0.7f), fontSize = 16.sp)
+            }
+
+            Column(
+                modifier = Modifier.align(Alignment.BottomCenter).padding(bottom = 48.dp),
+                horizontalAlignment = Alignment.CenterHorizontally,
+            ) {
+                PreviewCallControls(audioRoute = "bluetooth", showAddParticipant = true)
+            }
+        }
+    }
+}
+
+// ---- 11. Call ended ----
+
+@Preview(showBackground = true, widthDp = 360, heightDp = 640)
+@Composable
+fun PreviewCallEndedScreen() {
+    ThemeComparisonColumn {
+        PreviewCallInProgress("Alice", "Call ended")
+    }
+}
+
+// ---- 12. Group call with 5+ members (shows +N badge) ----
+
+@Preview(showBackground = true, widthDp = 360, heightDp = 640)
+@Composable
+fun PreviewGroupCallLargeGroup() {
+    ThemeComparisonColumn {
+        Box(
+            modifier =
+                Modifier
+                    .fillMaxSize()
+                    .background(Color.Black),
+        ) {
+            Column(
+                modifier = Modifier.fillMaxSize(),
+                horizontalAlignment = Alignment.CenterHorizontally,
+                verticalArrangement = Arrangement.Center,
+            ) {
+                PreviewGroupAvatars(6, tint = Color.White.copy(alpha = 0.5f))
+                Spacer(modifier = Modifier.height(16.dp))
+                Text("Alice, Bob +4", fontWeight = FontWeight.Bold, fontSize = 20.sp, color = Color.White)
+                Spacer(modifier = Modifier.height(8.dp))
+                Text("03:21", color = Color.White.copy(alpha = 0.7f), fontSize = 16.sp)
+            }
+
+            Column(
+                modifier = Modifier.align(Alignment.BottomCenter).padding(bottom = 48.dp),
+                horizontalAlignment = Alignment.CenterHorizontally,
+            ) {
+                PreviewCallControls(showAddParticipant = true)
+            }
+        }
+    }
+}
+
+// ---- 13. PiP mode (small) ----
+
+@Preview(showBackground = true, widthDp = 200, heightDp = 120)
+@Composable
+fun PreviewPipCallUI() {
+    Box(
+        modifier =
+            Modifier
+                .fillMaxSize()
+                .background(MaterialTheme.colorScheme.surface),
+        contentAlignment = Alignment.Center,
+    ) {
+        Column(
+            horizontalAlignment = Alignment.CenterHorizontally,
+            verticalArrangement = Arrangement.Center,
+        ) {
+            Icon(Icons.Default.Person, contentDescription = null, modifier = Modifier.size(48.dp))
+            Spacer(modifier = Modifier.height(4.dp))
+            Text("Calling\u2026", fontSize = 10.sp, color = MaterialTheme.colorScheme.onSurfaceVariant)
+        }
+    }
+}
+
+// ---- 14. PiP connected (small) ----
+
+@Preview(showBackground = true, widthDp = 200, heightDp = 120)
+@Composable
+fun PreviewPipConnectedCallUI() {
+    Box(
+        modifier =
+            Modifier
+                .fillMaxSize()
+                .background(Color.Black),
+        contentAlignment = Alignment.Center,
+    ) {
+        Column(
+            horizontalAlignment = Alignment.CenterHorizontally,
+            verticalArrangement = Arrangement.Center,
+        ) {
+            Icon(Icons.Default.Person, contentDescription = null, modifier = Modifier.size(48.dp), tint = Color.White.copy(alpha = 0.5f))
+            Spacer(modifier = Modifier.height(4.dp))
+            Text("02:45", fontSize = 10.sp, color = Color.White.copy(alpha = 0.7f))
+        }
+    }
 }

amethyst/src/main/res/values/strings.xml

@@ -796,6 +796,9 @@
     <string name="call_bluetooth">Bluetooth</string>
     <string name="call_voice">Voice call</string>
     <string name="call_video">Video call</string>
+    <string name="call_waiting_for_others">Waiting for others to join\u2026</string>
+    <string name="call_add_participant">Add participant</string>
+    <string name="call_search_users">Search users\u2026</string>
     <string name="call_failed_start">Failed to start call</string>
     <string name="call_failed_accept">Failed to accept call</string>
     <string name="call_failed_session">Failed to create call session</string>

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/call/CallManager.kt

@@ -155,15 +155,37 @@ class CallManager(
     fun onCallAnswered(event: CallAnswerEvent) {
         val current = _state.value
         val callId = event.callId()
+        val answeringPeer = event.pubKey
 
         when (current) {
             is CallState.Offering -> {
                 if (callId != current.callId) return
-                _state.value = CallState.Connecting(current.callId, current.peerPubKeys, current.callType)
+                // First answer: start the call immediately. Remaining peers stay pending.
+                val pending = current.peerPubKeys - answeringPeer
+                _state.value =
+                    CallState.Connecting(
+                        current.callId,
+                        setOf(answeringPeer),
+                        current.callType,
+                        pendingPeerPubKeys = pending,
+                    )
                 cancelTimeout()
                 onAnswerReceived?.invoke(event)
             }
 
+            is CallState.Connecting -> {
+                // Another peer answered while we're still connecting with the first
+                if (callId != current.callId) return
+                if (answeringPeer in current.pendingPeerPubKeys) {
+                    _state.value =
+                        current.copy(
+                            peerPubKeys = current.peerPubKeys + answeringPeer,
+                            pendingPeerPubKeys = current.pendingPeerPubKeys - answeringPeer,
+                        )
+                }
+                // TODO: establish additional WebRTC peer connection for this peer
+            }
+
             is CallState.IncomingCall -> {
                 // Another device of this user answered the call — stop ringing.
                 if (callId != current.callId) return
@@ -171,10 +193,20 @@ class CallManager(
             }
 
             is CallState.Connected -> {
-                // Renegotiation answer (e.g., peer accepted our video upgrade offer)
                 if (callId != current.callId) return
+                if (answeringPeer in current.pendingPeerPubKeys) {
+                    // A pending peer just joined the group call
+                    _state.value =
+                        current.copy(
+                            peerPubKeys = current.peerPubKeys + answeringPeer,
+                            pendingPeerPubKeys = current.pendingPeerPubKeys - answeringPeer,
+                        )
+                    // TODO: establish additional WebRTC peer connection for this peer
+                } else {
+                    // Renegotiation answer (e.g., peer accepted our video upgrade offer)
                     onAnswerReceived?.invoke(event)
                 }
+            }
 
             else -> {
                 return
@@ -185,11 +217,31 @@ class CallManager(
     fun onCallRejected(event: CallRejectEvent) {
         val current = _state.value
         val callId = event.callId()
+        val rejectingPeer = event.pubKey
 
         when (current) {
             is CallState.Offering -> {
                 if (callId != current.callId) return
+                val remaining = current.peerPubKeys - rejectingPeer
+                if (remaining.isEmpty()) {
                     transitionToEnded(current.callId, current.peerPubKeys, EndReason.PEER_REJECTED)
+                } else {
+                    _state.value = current.copy(peerPubKeys = remaining)
+                }
+            }
+
+            is CallState.Connecting -> {
+                // A pending peer rejected while we're already connecting with another
+                if (callId != current.callId) return
+                _state.value =
+                    current.copy(pendingPeerPubKeys = current.pendingPeerPubKeys - rejectingPeer)
+            }
+
+            is CallState.Connected -> {
+                // A pending peer rejected while we're already in the call
+                if (callId != current.callId) return
+                _state.value =
+                    current.copy(pendingPeerPubKeys = current.pendingPeerPubKeys - rejectingPeer)
             }
 
             is CallState.IncomingCall -> {
@@ -245,9 +297,40 @@ class CallManager(
                 peerPubKeys = current.peerPubKeys,
                 callType = current.callType,
                 startedAtEpoch = TimeUtils.now(),
+                pendingPeerPubKeys = current.pendingPeerPubKeys,
             )
     }
 
+    /** Invites a new peer into the current call by sending them an offer. */
+    suspend fun invitePeer(
+        peerPubKey: HexKey,
+        sdpOffer: String,
+    ) {
+        val current = _state.value
+        val callId: String
+        val callType: CallType
+        when (current) {
+            is CallState.Connecting -> {
+                callId = current.callId
+                callType = current.callType
+                _state.value = current.copy(pendingPeerPubKeys = current.pendingPeerPubKeys + peerPubKey)
+            }
+
+            is CallState.Connected -> {
+                callId = current.callId
+                callType = current.callType
+                _state.value = current.copy(pendingPeerPubKeys = current.pendingPeerPubKeys + peerPubKey)
+            }
+
+            else -> {
+                return
+            }
+        }
+
+        val result = factory.createCallOffer(sdpOffer, peerPubKey, callId, callType, signer)
+        publishEvent(result.wrap)
+    }
+
     suspend fun hangup() {
         val peerPubKeys: Set<HexKey>
         val callId: String
@@ -285,18 +368,67 @@ class CallManager(
     fun onPeerHangup(event: CallHangupEvent) {
         val current = _state.value
         val callId = event.callId() ?: return
-        val currentCallId =
+        val leavingPeer = event.pubKey
-            when (current) {
-                is CallState.Offering -> current.callId
-                is CallState.Connecting -> current.callId
-                is CallState.Connected -> current.callId
-                is CallState.IncomingCall -> current.callId
-                else -> return
-            }
-        if (callId != currentCallId) return
 
-        val peerPubKeys = currentPeerPubKeys() ?: return
+        when (current) {
-        transitionToEnded(callId, peerPubKeys, EndReason.PEER_HANGUP)
+            is CallState.Connected -> {
+                if (callId != current.callId) return
+                val connectedRemaining = current.peerPubKeys - leavingPeer
+                val pendingRemaining = current.pendingPeerPubKeys - leavingPeer
+                if (connectedRemaining.isEmpty() && pendingRemaining.isEmpty()) {
+                    transitionToEnded(callId, current.allPeerPubKeys, EndReason.PEER_HANGUP)
+                } else {
+                    _state.value =
+                        current.copy(
+                            peerPubKeys = connectedRemaining,
+                            pendingPeerPubKeys = pendingRemaining,
+                        )
+                }
+            }
+
+            is CallState.Connecting -> {
+                if (callId != current.callId) return
+                val connectedRemaining = current.peerPubKeys - leavingPeer
+                val pendingRemaining = current.pendingPeerPubKeys - leavingPeer
+                if (connectedRemaining.isEmpty() && pendingRemaining.isEmpty()) {
+                    transitionToEnded(callId, current.peerPubKeys + current.pendingPeerPubKeys, EndReason.PEER_HANGUP)
+                } else {
+                    _state.value =
+                        current.copy(
+                            peerPubKeys = connectedRemaining,
+                            pendingPeerPubKeys = pendingRemaining,
+                        )
+                }
+            }
+
+            is CallState.Offering -> {
+                if (callId != current.callId) return
+                val remaining = current.peerPubKeys - leavingPeer
+                if (remaining.isEmpty()) {
+                    transitionToEnded(callId, current.peerPubKeys, EndReason.PEER_HANGUP)
+                } else {
+                    _state.value = current.copy(peerPubKeys = remaining)
+                }
+            }
+
+            is CallState.IncomingCall -> {
+                if (callId != current.callId) return
+                if (leavingPeer == current.callerPubKey) {
+                    transitionToEnded(callId, current.groupMembers, EndReason.PEER_HANGUP)
+                } else {
+                    val remaining = current.groupMembers - leavingPeer
+                    if (remaining.size <= 1) {
+                        transitionToEnded(callId, current.groupMembers, EndReason.PEER_HANGUP)
+                    } else {
+                        _state.value = current.copy(groupMembers = remaining)
+                    }
+                }
+            }
+
+            else -> {
+                return
+            }
+        }
     }
 
     fun onSignalingEvent(event: Event) {
@@ -330,13 +462,13 @@ class CallManager(
     /** Returns the first peer pubkey (for P2P calls) or null. */
     fun currentPeerPubKey(): HexKey? = currentPeerPubKeys()?.firstOrNull()
 
-    /** Returns all peer pubkeys for the current call. */
+    /** Returns all peer pubkeys for the current call (connected + pending). */
     fun currentPeerPubKeys(): Set<HexKey>? =
         when (val s = _state.value) {
             is CallState.Offering -> s.peerPubKeys
             is CallState.IncomingCall -> s.peerPubKeys()
-            is CallState.Connecting -> s.peerPubKeys
+            is CallState.Connecting -> s.peerPubKeys + s.pendingPeerPubKeys
-            is CallState.Connected -> s.peerPubKeys
+            is CallState.Connected -> s.allPeerPubKeys
             else -> null
         }
 

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/call/CallState.kt

@@ -46,6 +46,7 @@ sealed interface CallState {
         val callId: String,
         val peerPubKeys: Set<HexKey>,
         val callType: CallType,
+        val pendingPeerPubKeys: Set<HexKey> = emptySet(),
     ) : CallState
 
     data class Connected(
@@ -53,7 +54,11 @@ sealed interface CallState {
         val peerPubKeys: Set<HexKey>,
         val callType: CallType,
         val startedAtEpoch: Long,
-    ) : CallState
+        val pendingPeerPubKeys: Set<HexKey> = emptySet(),
+    ) : CallState {
+        /** All peers: connected + still pending. */
+        val allPeerPubKeys: Set<HexKey> get() = peerPubKeys + pendingPeerPubKeys
+    }
 
     data class Ended(
         val callId: String,