Initial commit: Helios Alarm Clock

Android alarm clock with embedded Ktor HTTP server for remote control.
Features in-app and HTTP API alarm management, full-screen alarm activity
with sound/vibration, DND bypass, boot persistence, and dark Material 3 UI.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/.gitignore

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+/build

app/build.gradle.kts

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+plugins {
+    alias(libs.plugins.android.application)
+    alias(libs.plugins.kotlin.serialization)
+    alias(libs.plugins.compose.compiler)
+    alias(libs.plugins.ksp)
+    alias(libs.plugins.hilt)
+}
+
+android {
+    namespace = "com.example.helios_alarm_clock"
+    compileSdk {
+        version = release(36) {
+            minorApiLevel = 1
+        }
+    }
+
+    defaultConfig {
+        applicationId = "com.example.helios_alarm_clock"
+        minSdk = 26
+        targetSdk = 36
+        versionCode = 1
+        versionName = "1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    signingConfigs {
+        create("release") {
+            storeFile = file(System.getProperty("user.home") + "/.android/debug.keystore")
+            storePassword = "android"
+            keyAlias = "androiddebugkey"
+            keyPassword = "android"
+        }
+    }
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+            signingConfig = signingConfigs.getByName("release")
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+    kotlin {
+        jvmToolchain(17)
+    }
+    buildFeatures {
+        compose = true
+    }
+}
+
+ksp {
+    arg("room.schemaLocation", "$projectDir/schemas")
+}
+
+dependencies {
+    // Core
+    implementation(libs.androidx.core.ktx)
+    implementation(libs.androidx.activity.compose)
+
+    // Compose
+    implementation(platform(libs.compose.bom))
+    implementation(libs.compose.ui)
+    implementation(libs.compose.ui.graphics)
+    implementation(libs.compose.ui.tooling.preview)
+    implementation(libs.compose.material3)
+    implementation(libs.compose.material.icons)
+    debugImplementation(libs.compose.ui.tooling)
+
+    // Lifecycle
+    implementation(libs.lifecycle.runtime.ktx)
+    implementation(libs.lifecycle.runtime.compose)
+    implementation(libs.lifecycle.viewmodel.compose)
+
+    // Hilt
+    implementation(libs.hilt.android)
+    ksp(libs.hilt.android.compiler)
+    implementation(libs.hilt.navigation.compose)
+
+    // Room
+    implementation(libs.room.runtime)
+    implementation(libs.room.ktx)
+    ksp(libs.room.compiler)
+
+    // Ktor Server
+    implementation(libs.ktor.server.core)
+    implementation(libs.ktor.server.cio)
+    implementation(libs.ktor.server.content.negotiation)
+    implementation(libs.ktor.serialization.kotlinx.json)
+
+    // Serialization
+    implementation(libs.kotlinx.serialization.json)
+
+    // Test
+    testImplementation(libs.junit)
+    androidTestImplementation(libs.androidx.junit)
+    androidTestImplementation(libs.androidx.espresso.core)
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/com/example/helios_alarm_clock/ExampleInstrumentedTest.kt

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+package com.example.helios_alarm_clock
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("com.example.helios_alarm_clock", appContext.packageName)
+    }
+}

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_CONNECTED_DEVICE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_SHORT_SERVICE" />
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+    <uses-permission android:name="android.permission.SCHEDULE_EXACT_ALARM" />
+    <uses-permission android:name="android.permission.USE_EXACT_ALARM" />
+    <uses-permission android:name="android.permission.USE_FULL_SCREEN_INTENT" />
+    <uses-permission android:name="android.permission.WAKE_LOCK" />
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
+    <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />
+
+    <application
+        android:name=".HeliosApp"
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Heliosalarmclock">
+
+        <activity
+            android:name=".ui.MainActivity"
+            android:exported="true"
+            android:theme="@style/Theme.Heliosalarmclock">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <activity
+            android:name=".ui.AlarmActivity"
+            android:exported="false"
+            android:showWhenLocked="true"
+            android:turnScreenOn="true"
+            android:launchMode="singleInstance"
+            android:theme="@style/Theme.Heliosalarmclock" />
+
+        <service
+            android:name=".service.KtorService"
+            android:enabled="true"
+            android:exported="false"
+            android:foregroundServiceType="connectedDevice" />
+
+        <service
+            android:name=".service.AlarmRingService"
+            android:enabled="true"
+            android:exported="false"
+            android:foregroundServiceType="shortService" />
+
+        <receiver
+            android:name=".receiver.AlarmReceiver"
+            android:enabled="true"
+            android:exported="false" />
+
+        <receiver
+            android:name=".receiver.BootReceiver"
+            android:enabled="true"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.BOOT_COMPLETED" />
+            </intent-filter>
+        </receiver>
+
+    </application>
+
+</manifest>

app/src/main/java/com/example/helios_alarm_clock/HeliosApp.kt

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+package com.example.helios_alarm_clock
+
+import android.app.Application
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import dagger.hilt.android.HiltAndroidApp
+
+@HiltAndroidApp
+class HeliosApp : Application() {
+
+    override fun onCreate() {
+        super.onCreate()
+        createNotificationChannels()
+    }
+
+    private fun createNotificationChannels() {
+        val manager = getSystemService(NotificationManager::class.java)
+
+        val serviceChannel = NotificationChannel(
+            CHANNEL_SERVICE,
+            "Server Service",
+            NotificationManager.IMPORTANCE_LOW
+        ).apply {
+            description = "Keeps the HTTP server running in the background"
+        }
+
+        val alarmChannel = NotificationChannel(
+            CHANNEL_ALARM,
+            "Alarm",
+            NotificationManager.IMPORTANCE_HIGH
+        ).apply {
+            description = "Alarm notifications"
+            setBypassDnd(true)
+            lockscreenVisibility = android.app.Notification.VISIBILITY_PUBLIC
+        }
+
+        manager.createNotificationChannels(listOf(serviceChannel, alarmChannel))
+    }
+
+    companion object {
+        const val CHANNEL_SERVICE = "ktor_service_channel"
+        const val CHANNEL_ALARM = "alarm_channel"
+    }
+}

app/src/main/java/com/example/helios_alarm_clock/data/AlarmDao.kt

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+package com.example.helios_alarm_clock.data
+
+import androidx.room.Dao
+import androidx.room.Insert
+import androidx.room.OnConflictStrategy
+import androidx.room.Query
+import kotlinx.coroutines.flow.Flow
+
+@Dao
+interface AlarmDao {
+
+    @Query("SELECT * FROM alarms ORDER BY hour, minute")
+    fun observeAll(): Flow<List<AlarmEntity>>
+
+    @Query("SELECT * FROM alarms ORDER BY hour, minute")
+    suspend fun getAll(): List<AlarmEntity>
+
+    @Query("SELECT * FROM alarms WHERE id = :id")
+    suspend fun getById(id: String): AlarmEntity?
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun insert(alarm: AlarmEntity)
+
+    @Query("DELETE FROM alarms WHERE id = :id")
+    suspend fun deleteById(id: String): Int
+}

app/src/main/java/com/example/helios_alarm_clock/data/AlarmDatabase.kt

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+package com.example.helios_alarm_clock.data
+
+import androidx.room.Database
+import androidx.room.RoomDatabase
+
+@Database(entities = [AlarmEntity::class], version = 1, exportSchema = true)
+abstract class AlarmDatabase : RoomDatabase() {
+    abstract fun alarmDao(): AlarmDao
+
+    companion object {
+        const val NAME = "helios_alarms.db"
+    }
+}

app/src/main/java/com/example/helios_alarm_clock/data/AlarmEntity.kt

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+package com.example.helios_alarm_clock.data
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import kotlinx.serialization.Serializable
+
+@Serializable
+@Entity(tableName = "alarms")
+data class AlarmEntity(
+    @PrimaryKey
+    val id: String,
+    val hour: Int,
+    val minute: Int,
+    val label: String,
+    val triggerTimeMillis: Long
+)

app/src/main/java/com/example/helios_alarm_clock/di/AppModule.kt

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+package com.example.helios_alarm_clock.di
+
+import android.content.Context
+import androidx.room.Room
+import com.example.helios_alarm_clock.data.AlarmDao
+import com.example.helios_alarm_clock.data.AlarmDatabase
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.components.SingletonComponent
+import javax.inject.Singleton
+
+@Module
+@InstallIn(SingletonComponent::class)
+object AppModule {
+
+    @Provides
+    @Singleton
+    fun provideDatabase(@ApplicationContext context: Context): AlarmDatabase =
+        Room.databaseBuilder(
+            context,
+            AlarmDatabase::class.java,
+            AlarmDatabase.NAME
+        ).build()
+
+    @Provides
+    @Singleton
+    fun provideAlarmDao(db: AlarmDatabase): AlarmDao = db.alarmDao()
+}

app/src/main/java/com/example/helios_alarm_clock/receiver/AlarmReceiver.kt

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+package com.example.helios_alarm_clock.receiver
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.os.PowerManager
+import com.example.helios_alarm_clock.ui.AlarmActivity
+
+class AlarmReceiver : BroadcastReceiver() {
+
+    override fun onReceive(context: Context, intent: Intent) {
+        val alarmId = intent.getStringExtra(EXTRA_ALARM_ID) ?: return
+        val label = intent.getStringExtra(EXTRA_ALARM_LABEL) ?: "Alarm"
+
+        // Wake lock to keep CPU alive while we launch the activity
+        val pm = context.getSystemService(Context.POWER_SERVICE) as PowerManager
+        val wl = pm.newWakeLock(
+            PowerManager.PARTIAL_WAKE_LOCK,
+            "helios::alarm_receiver"
+        )
+        wl.acquire(10_000L)
+
+        // Launch AlarmActivity directly — no notification
+        val activityIntent = Intent(context, AlarmActivity::class.java).apply {
+            flags = Intent.FLAG_ACTIVITY_NEW_TASK or
+                    Intent.FLAG_ACTIVITY_CLEAR_TOP or
+                    Intent.FLAG_ACTIVITY_NO_USER_ACTION
+            putExtra(EXTRA_ALARM_ID, alarmId)
+            putExtra(EXTRA_ALARM_LABEL, label)
+        }
+        context.startActivity(activityIntent)
+    }
+
+    companion object {
+        const val EXTRA_ALARM_ID = "alarm_id"
+        const val EXTRA_ALARM_LABEL = "alarm_label"
+    }
+}

app/src/main/java/com/example/helios_alarm_clock/receiver/BootReceiver.kt

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+package com.example.helios_alarm_clock.receiver
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import com.example.helios_alarm_clock.service.KtorService
+
+class BootReceiver : BroadcastReceiver() {
+
+    override fun onReceive(context: Context, intent: Intent) {
+        if (intent.action == Intent.ACTION_BOOT_COMPLETED) {
+            KtorService.start(context)
+        }
+    }
+}

app/src/main/java/com/example/helios_alarm_clock/service/AlarmRingService.kt

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+package com.example.helios_alarm_clock.service
+
+import android.app.PendingIntent
+import android.app.Service
+import android.content.Context
+import android.content.Intent
+import android.content.pm.ServiceInfo
+import android.media.AudioAttributes
+import android.media.MediaPlayer
+import android.media.RingtoneManager
+import android.os.IBinder
+import android.os.VibrationEffect
+import android.os.Vibrator
+import android.util.Log
+import androidx.core.app.NotificationCompat
+import com.example.helios_alarm_clock.HeliosApp
+import com.example.helios_alarm_clock.R
+import com.example.helios_alarm_clock.data.AlarmDao
+import com.example.helios_alarm_clock.receiver.AlarmReceiver
+import com.example.helios_alarm_clock.ui.AlarmActivity
+import dagger.hilt.android.AndroidEntryPoint
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.cancel
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+
+@AndroidEntryPoint
+class AlarmRingService : Service() {
+
+    @Inject lateinit var alarmDao: AlarmDao
+
+    private var mediaPlayer: MediaPlayer? = null
+    private var vibrator: Vibrator? = null
+    private val scope = CoroutineScope(Dispatchers.IO + SupervisorJob())
+
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        if (intent?.action == ACTION_STOP) {
+            stopSelf()
+            return START_NOT_STICKY
+        }
+
+        val alarmId = intent?.getStringExtra(AlarmReceiver.EXTRA_ALARM_ID) ?: ""
+        val label = intent?.getStringExtra(AlarmReceiver.EXTRA_ALARM_LABEL) ?: "Alarm"
+
+        try {
+            startForeground(
+                NOTIFICATION_ID,
+                buildNotification(alarmId, label),
+                ServiceInfo.FOREGROUND_SERVICE_TYPE_SHORT_SERVICE
+            )
+        } catch (e: Exception) {
+            Log.e(TAG, "startForeground failed", e)
+            stopSelf()
+            return START_NOT_STICKY
+        }
+
+        startSound()
+        startVibration()
+
+        // Delete the fired alarm from the database
+        if (alarmId.isNotEmpty()) {
+            scope.launch {
+                try {
+                    alarmDao.deleteById(alarmId)
+                } catch (e: Exception) {
+                    Log.e(TAG, "Failed to delete alarm $alarmId", e)
+                }
+            }
+        }
+
+        return START_NOT_STICKY
+    }
+
+    override fun onTimeout(foregroundServiceType: Int) {
+        Log.w(TAG, "Service timeout reached, stopping")
+        stopSelf()
+    }
+
+    override fun onDestroy() {
+        mediaPlayer?.let {
+            try {
+                if (it.isPlaying) it.stop()
+                it.release()
+            } catch (_: Exception) {}
+        }
+        mediaPlayer = null
+        vibrator?.cancel()
+        vibrator = null
+        scope.cancel()
+        super.onDestroy()
+    }
+
+    override fun onBind(intent: Intent?): IBinder? = null
+
+    private fun startSound() {
+        try {
+            val alarmUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM)
+                ?: RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION)
+                ?: return
+            mediaPlayer = MediaPlayer().apply {
+                setAudioAttributes(
+                    AudioAttributes.Builder()
+                        .setUsage(AudioAttributes.USAGE_ALARM)
+                        .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
+                        .build()
+                )
+                setDataSource(this@AlarmRingService, alarmUri)
+                isLooping = true
+                prepare()
+                start()
+            }
+        } catch (e: Exception) {
+            Log.e(TAG, "Failed to start alarm sound", e)
+        }
+    }
+
+    private fun startVibration() {
+        try {
+            vibrator = getSystemService(Vibrator::class.java)
+            val pattern = longArrayOf(0, 800, 400, 800, 400)
+            vibrator?.vibrate(VibrationEffect.createWaveform(pattern, 0))
+        } catch (e: Exception) {
+            Log.e(TAG, "Failed to start vibration", e)
+        }
+    }
+
+    private fun buildNotification(alarmId: String, label: String): android.app.Notification {
+        val fullScreenIntent = Intent(this, AlarmActivity::class.java).apply {
+            flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TOP
+            putExtra(AlarmReceiver.EXTRA_ALARM_ID, alarmId)
+            putExtra(AlarmReceiver.EXTRA_ALARM_LABEL, label)
+        }
+        val fullScreenPi = PendingIntent.getActivity(
+            this, alarmId.hashCode(), fullScreenIntent,
+            PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
+        )
+
+        val stopIntent = Intent(this, AlarmRingService::class.java).apply {
+            action = ACTION_STOP
+        }
+        val stopPi = PendingIntent.getService(
+            this, 0, stopIntent,
+            PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
+        )
+
+        return NotificationCompat.Builder(this, HeliosApp.CHANNEL_ALARM)
+            .setSmallIcon(R.mipmap.ic_launcher)
+            .setContentTitle("Helios Alarm")
+            .setContentText(label)
+            .setPriority(NotificationCompat.PRIORITY_MAX)
+            .setCategory(NotificationCompat.CATEGORY_ALARM)
+            .setFullScreenIntent(fullScreenPi, true)
+            .setContentIntent(fullScreenPi)
+            .addAction(0, "Dismiss", stopPi)
+            .setOngoing(true)
+            .build()
+    }
+
+    companion object {
+        private const val TAG = "AlarmRingService"
+        const val NOTIFICATION_ID = 2
+        private const val ACTION_STOP = "com.example.helios_alarm_clock.STOP_ALARM"
+
+        fun start(context: Context, alarmId: String, label: String) {
+            val intent = Intent(context, AlarmRingService::class.java).apply {
+                putExtra(AlarmReceiver.EXTRA_ALARM_ID, alarmId)
+                putExtra(AlarmReceiver.EXTRA_ALARM_LABEL, label)
+            }
+            context.startForegroundService(intent)
+        }
+
+        fun stop(context: Context) {
+            context.stopService(Intent(context, AlarmRingService::class.java))
+        }
+    }
+}

app/src/main/java/com/example/helios_alarm_clock/service/KtorService.kt

@@ -0,0 +1,220 @@
+package com.example.helios_alarm_clock.service
+
+import android.app.Notification
+import android.app.PendingIntent
+import android.app.Service
+import android.content.Context
+import android.content.Intent
+import android.os.IBinder
+import android.os.PowerManager
+import androidx.core.app.NotificationCompat
+import com.example.helios_alarm_clock.HeliosApp
+import com.example.helios_alarm_clock.R
+import com.example.helios_alarm_clock.data.AlarmDao
+import com.example.helios_alarm_clock.data.AlarmEntity
+import com.example.helios_alarm_clock.ui.MainActivity
+import com.example.helios_alarm_clock.util.AlarmScheduler
+import com.example.helios_alarm_clock.util.getLocalIpAddress
+import dagger.hilt.android.AndroidEntryPoint
+import io.ktor.http.HttpStatusCode
+import io.ktor.serialization.kotlinx.json.json
+import io.ktor.server.application.install
+import io.ktor.server.cio.CIO
+import io.ktor.server.cio.CIOApplicationEngine
+import io.ktor.server.engine.EmbeddedServer
+import io.ktor.server.engine.embeddedServer
+import io.ktor.server.plugins.contentnegotiation.ContentNegotiation
+import io.ktor.server.request.receive
+import io.ktor.server.response.respond
+import io.ktor.server.routing.get
+import io.ktor.server.routing.post
+import io.ktor.server.routing.routing
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.cancel
+import kotlinx.coroutines.launch
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.Json
+import java.util.Calendar
+import java.util.UUID
+import javax.inject.Inject
+
+@AndroidEntryPoint
+class KtorService : Service() {
+
+    @Inject lateinit var alarmDao: AlarmDao
+    @Inject lateinit var alarmScheduler: AlarmScheduler
+
+    private var server: EmbeddedServer<CIOApplicationEngine, CIOApplicationEngine.Configuration>? = null
+    private val serviceScope = CoroutineScope(Dispatchers.IO + SupervisorJob())
+    private var wakeLock: PowerManager.WakeLock? = null
+
+    override fun onCreate() {
+        super.onCreate()
+        acquireWakeLock()
+        startForeground(NOTIFICATION_ID, buildNotification())
+        startServer()
+        rescheduleAlarms()
+    }
+
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        return START_STICKY
+    }
+
+    override fun onBind(intent: Intent?): IBinder? = null
+
+    override fun onDestroy() {
+        server?.stop(1000, 2000)
+        serviceScope.cancel()
+        releaseWakeLock()
+        super.onDestroy()
+    }
+
+    private fun acquireWakeLock() {
+        val pm = getSystemService(Context.POWER_SERVICE) as PowerManager
+        wakeLock = pm.newWakeLock(
+            PowerManager.PARTIAL_WAKE_LOCK,
+            "helios::ktor_service"
+        ).apply { acquire() }
+    }
+
+    private fun releaseWakeLock() {
+        wakeLock?.let { if (it.isHeld) it.release() }
+        wakeLock = null
+    }
+
+    private fun rescheduleAlarms() {
+        serviceScope.launch {
+            val now = System.currentTimeMillis()
+            for (alarm in alarmDao.getAll()) {
+                if (alarm.triggerTimeMillis > now) {
+                    alarmScheduler.schedule(alarm)
+                } else {
+                    alarmDao.deleteById(alarm.id)
+                }
+            }
+        }
+    }
+
+    private fun startServer() {
+        server = embeddedServer(CIO, port = PORT) {
+            install(ContentNegotiation) {
+                json(Json {
+                    prettyPrint = true
+                    isLenient = true
+                    ignoreUnknownKeys = true
+                })
+            }
+
+            routing {
+                post("/set") {
+                    try {
+                        val req = call.receive<SetAlarmRequest>()
+                        val id = UUID.randomUUID().toString()
+
+                        val now = Calendar.getInstance()
+                        val trigger = Calendar.getInstance().apply {
+                            set(Calendar.HOUR_OF_DAY, req.hour)
+                            set(Calendar.MINUTE, req.minute)
+                            set(Calendar.SECOND, 0)
+                            set(Calendar.MILLISECOND, 0)
+                            if (before(now)) add(Calendar.DAY_OF_YEAR, 1)
+                        }
+
+                        val entity = AlarmEntity(
+                            id = id,
+                            hour = req.hour,
+                            minute = req.minute,
+                            label = req.label,
+                            triggerTimeMillis = trigger.timeInMillis
+                        )
+
+                        alarmDao.insert(entity)
+                        alarmScheduler.schedule(entity)
+
+                        call.respond(HttpStatusCode.Created, SetAlarmResponse(id))
+                    } catch (e: Exception) {
+                        call.respond(
+                            HttpStatusCode.BadRequest,
+                            ErrorResponse(e.message ?: "Invalid request")
+                        )
+                    }
+                }
+
+                post("/rm") {
+                    try {
+                        val req = call.receive<RemoveAlarmRequest>()
+                        val alarm = alarmDao.getById(req.id)
+                        if (alarm != null) {
+                            alarmScheduler.cancel(alarm)
+                            alarmDao.deleteById(req.id)
+                            call.respond(HttpStatusCode.OK, StatusResponse("removed"))
+                        } else {
+                            call.respond(
+                                HttpStatusCode.NotFound,
+                                ErrorResponse("Alarm not found")
+                            )
+                        }
+                    } catch (e: Exception) {
+                        call.respond(
+                            HttpStatusCode.BadRequest,
+                            ErrorResponse(e.message ?: "Invalid request")
+                        )
+                    }
+                }
+
+                get("/list") {
+                    val alarms = alarmDao.getAll()
+                    call.respond(alarms)
+                }
+            }
+        }.also { it.start(wait = false) }
+    }
+
+    private fun buildNotification(): Notification {
+        val ip = getLocalIpAddress() ?: "No network"
+        val contentIntent = PendingIntent.getActivity(
+            this,
+            0,
+            Intent(this, MainActivity::class.java),
+            PendingIntent.FLAG_IMMUTABLE
+        )
+        return NotificationCompat.Builder(this, HeliosApp.CHANNEL_SERVICE)
+            .setContentTitle("Helios Server Running")
+            .setContentText("Listening on $ip:$PORT")
+            .setSmallIcon(R.mipmap.ic_launcher)
+            .setOngoing(true)
+            .setContentIntent(contentIntent)
+            .build()
+    }
+
+    companion object {
+        const val PORT = 8080
+        const val NOTIFICATION_ID = 1
+
+        fun start(context: Context) {
+            val intent = Intent(context, KtorService::class.java)
+            context.startForegroundService(intent)
+        }
+
+        fun stop(context: Context) {
+            context.stopService(Intent(context, KtorService::class.java))
+        }
+    }
+}
+
+@Serializable
+data class SetAlarmRequest(val hour: Int, val minute: Int, val label: String = "")
+
+@Serializable
+data class RemoveAlarmRequest(val id: String)
+
+@Serializable
+data class SetAlarmResponse(val id: String)
+
+@Serializable
+data class StatusResponse(val status: String)
+
+@Serializable
+data class ErrorResponse(val error: String)

app/src/main/java/com/example/helios_alarm_clock/ui/AlarmActivity.kt

@@ -0,0 +1,193 @@
+package com.example.helios_alarm_clock.ui
+
+import android.media.AudioAttributes
+import android.media.MediaPlayer
+import android.media.RingtoneManager
+import android.os.Bundle
+import android.os.VibrationEffect
+import android.os.Vibrator
+import android.util.Log
+import android.view.WindowManager
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.Button
+import androidx.compose.material3.ButtonDefaults
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import com.example.helios_alarm_clock.data.AlarmDao
+import com.example.helios_alarm_clock.ui.theme.HeliosTheme
+import dagger.hilt.android.AndroidEntryPoint
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.cancel
+import kotlinx.coroutines.launch
+import java.util.Calendar
+import javax.inject.Inject
+
+@AndroidEntryPoint
+class AlarmActivity : ComponentActivity() {
+
+    @Inject lateinit var alarmDao: AlarmDao
+
+    private var mediaPlayer: MediaPlayer? = null
+    private var vibrator: Vibrator? = null
+    private val scope = CoroutineScope(Dispatchers.IO + SupervisorJob())
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        window.addFlags(
+            WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON or
+                WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON
+        )
+
+        val alarmId = intent.getStringExtra(EXTRA_ALARM_ID) ?: ""
+        val label = intent.getStringExtra(EXTRA_ALARM_LABEL) ?: "Alarm"
+
+        startSound()
+        startVibration()
+
+        // Delete the fired alarm from the database
+        if (alarmId.isNotEmpty()) {
+            scope.launch {
+                try {
+                    alarmDao.deleteById(alarmId)
+                } catch (e: Exception) {
+                    Log.e(TAG, "Failed to delete alarm $alarmId", e)
+                }
+            }
+        }
+
+        setContent {
+            HeliosTheme {
+                AlarmScreen(label = label) {
+                    stopAlarm()
+                    finish()
+                }
+            }
+        }
+    }
+
+    override fun onDestroy() {
+        stopAlarm()
+        scope.cancel()
+        super.onDestroy()
+    }
+
+    private fun stopAlarm() {
+        mediaPlayer?.let {
+            try {
+                if (it.isPlaying) it.stop()
+                it.release()
+            } catch (_: Exception) {}
+        }
+        mediaPlayer = null
+        vibrator?.cancel()
+        vibrator = null
+    }
+
+    private fun startSound() {
+        try {
+            val alarmUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM)
+                ?: RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION)
+                ?: return
+            mediaPlayer = MediaPlayer().apply {
+                setAudioAttributes(
+                    AudioAttributes.Builder()
+                        .setUsage(AudioAttributes.USAGE_ALARM)
+                        .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
+                        .build()
+                )
+                setDataSource(this@AlarmActivity, alarmUri)
+                isLooping = true
+                prepare()
+                start()
+            }
+        } catch (e: Exception) {
+            Log.e(TAG, "Failed to start alarm sound", e)
+        }
+    }
+
+    private fun startVibration() {
+        try {
+            vibrator = getSystemService(Vibrator::class.java)
+            val pattern = longArrayOf(0, 800, 400, 800, 400)
+            vibrator?.vibrate(VibrationEffect.createWaveform(pattern, 0))
+        } catch (e: Exception) {
+            Log.e(TAG, "Failed to start vibration", e)
+        }
+    }
+
+    companion object {
+        private const val TAG = "AlarmActivity"
+        const val EXTRA_ALARM_ID = "alarm_id"
+        const val EXTRA_ALARM_LABEL = "alarm_label"
+    }
+}
+
+@Composable
+fun AlarmScreen(label: String, onDismiss: () -> Unit) {
+    val currentTime = remember {
+        val cal = Calendar.getInstance()
+        String.format("%02d:%02d", cal.get(Calendar.HOUR_OF_DAY), cal.get(Calendar.MINUTE))
+    }
+
+    Surface(
+        modifier = Modifier.fillMaxSize(),
+        color = MaterialTheme.colorScheme.background
+    ) {
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(32.dp),
+            horizontalAlignment = Alignment.CenterHorizontally,
+            verticalArrangement = Arrangement.Center
+        ) {
+            Text(
+                text = currentTime,
+                fontSize = 72.sp,
+                fontWeight = FontWeight.Light,
+                color = MaterialTheme.colorScheme.primary
+            )
+            Spacer(modifier = Modifier.height(16.dp))
+            Text(
+                text = label,
+                style = MaterialTheme.typography.headlineMedium,
+                color = MaterialTheme.colorScheme.onBackground
+            )
+            Spacer(modifier = Modifier.height(64.dp))
+            Button(
+                onClick = onDismiss,
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .height(64.dp),
+                colors = ButtonDefaults.buttonColors(
+                    containerColor = MaterialTheme.colorScheme.error
+                ),
+                shape = MaterialTheme.shapes.large
+            ) {
+                Text(
+                    text = "Stop Alarm",
+                    fontSize = 20.sp,
+                    fontWeight = FontWeight.Bold
+                )
+            }
+        }
+    }
+}

app/src/main/java/com/example/helios_alarm_clock/ui/MainActivity.kt

@@ -0,0 +1,384 @@
+package com.example.helios_alarm_clock.ui
+
+import android.Manifest
+import android.app.AlarmManager
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.net.Uri
+import android.os.Build
+import android.os.Bundle
+import android.os.PowerManager
+import android.provider.Settings
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.compose.animation.animateColorAsState
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Add
+import androidx.compose.material.icons.filled.Delete
+import androidx.compose.material3.Card
+import androidx.compose.material3.CardDefaults
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.FilledTonalButton
+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.Scaffold
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.material3.TimePicker
+import androidx.compose.material3.TopAppBar
+import androidx.compose.material3.TopAppBarDefaults
+import androidx.compose.material3.rememberTimePickerState
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.window.Dialog
+import androidx.compose.ui.window.DialogProperties
+import androidx.core.content.ContextCompat
+import java.util.Calendar
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import com.example.helios_alarm_clock.data.AlarmEntity
+import com.example.helios_alarm_clock.ui.theme.HeliosTheme
+import dagger.hilt.android.AndroidEntryPoint
+
+@AndroidEntryPoint
+class MainActivity : ComponentActivity() {
+
+    private val notificationPermissionLauncher = registerForActivityResult(
+        ActivityResultContracts.RequestPermission()
+    ) { /* handled silently */ }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        requestPermissions()
+
+        setContent {
+            HeliosTheme {
+                MainScreen()
+            }
+        }
+    }
+
+    private fun requestPermissions() {
+        // Notification permission (Android 13+)
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            if (ContextCompat.checkSelfPermission(this, Manifest.permission.POST_NOTIFICATIONS)
+                != PackageManager.PERMISSION_GRANTED
+            ) {
+                notificationPermissionLauncher.launch(Manifest.permission.POST_NOTIFICATIONS)
+            }
+        }
+
+        // Exact alarm permission (Android 12+)
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+            val alarmManager = getSystemService(AlarmManager::class.java)
+            if (!alarmManager.canScheduleExactAlarms()) {
+                startActivity(Intent(Settings.ACTION_REQUEST_SCHEDULE_EXACT_ALARM))
+            }
+        }
+
+        // Battery optimization exemption
+        val pm = getSystemService(PowerManager::class.java)
+        if (!pm.isIgnoringBatteryOptimizations(packageName)) {
+            val intent = Intent(Settings.ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS).apply {
+                data = Uri.parse("package:$packageName")
+            }
+            startActivity(intent)
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun MainScreen(viewModel: MainViewModel = hiltViewModel()) {
+    val alarms by viewModel.alarms.collectAsStateWithLifecycle()
+    val serverRunning by viewModel.serverRunning.collectAsStateWithLifecycle()
+    var showAddDialog by remember { mutableStateOf(false) }
+
+    if (showAddDialog) {
+        AddAlarmDialog(
+            onDismiss = { showAddDialog = false },
+            onConfirm = { hour, minute, label ->
+                viewModel.createAlarm(hour, minute, label)
+                showAddDialog = false
+            }
+        )
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text("Helios Alarm") },
+                colors = TopAppBarDefaults.topAppBarColors(
+                    containerColor = MaterialTheme.colorScheme.surface
+                )
+            )
+        },
+        floatingActionButton = {
+            FloatingActionButton(
+                onClick = { showAddDialog = true },
+                containerColor = MaterialTheme.colorScheme.primary,
+                contentColor = MaterialTheme.colorScheme.onPrimary
+            ) {
+                Icon(Icons.Default.Add, contentDescription = "Add alarm")
+            }
+        }
+    ) { padding ->
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(padding)
+                .padding(16.dp)
+        ) {
+            ServerStatusCard(
+                ipAddress = viewModel.ipAddress,
+                port = viewModel.port,
+                isRunning = serverRunning,
+                onToggle = {
+                    if (serverRunning) viewModel.stopServer() else viewModel.startServer()
+                }
+            )
+
+            Spacer(modifier = Modifier.height(24.dp))
+
+            Text(
+                text = "Active Alarms",
+                style = MaterialTheme.typography.titleMedium,
+                fontWeight = FontWeight.SemiBold,
+                modifier = Modifier.padding(bottom = 8.dp)
+            )
+
+            if (alarms.isEmpty()) {
+                Box(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .weight(1f),
+                    contentAlignment = Alignment.Center
+                ) {
+                    Text(
+                        text = "No alarms set",
+                        style = MaterialTheme.typography.bodyLarge,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant
+                    )
+                }
+            } else {
+                LazyColumn(
+                    modifier = Modifier.weight(1f),
+                    verticalArrangement = Arrangement.spacedBy(8.dp)
+                ) {
+                    items(alarms, key = { it.id }) { alarm ->
+                        AlarmCard(
+                            alarm = alarm,
+                            onDelete = { viewModel.deleteAlarm(alarm) },
+                            modifier = Modifier.animateItem()
+                        )
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun ServerStatusCard(
+    ipAddress: String,
+    port: Int,
+    isRunning: Boolean,
+    onToggle: () -> Unit
+) {
+    val statusColor by animateColorAsState(
+        targetValue = if (isRunning)
+            MaterialTheme.colorScheme.primary
+        else
+            MaterialTheme.colorScheme.onSurfaceVariant,
+        label = "statusColor"
+    )
+
+    Card(
+        modifier = Modifier.fillMaxWidth(),
+        colors = CardDefaults.cardColors(
+            containerColor = MaterialTheme.colorScheme.surfaceVariant
+        )
+    ) {
+        Column(modifier = Modifier.padding(16.dp)) {
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                horizontalArrangement = Arrangement.SpaceBetween,
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                Column {
+                    Text(
+                        text = "HTTP Server",
+                        style = MaterialTheme.typography.titleMedium,
+                        fontWeight = FontWeight.Bold
+                    )
+                    Spacer(modifier = Modifier.height(4.dp))
+                    Text(
+                        text = if (isRunning) "$ipAddress:$port" else "Stopped",
+                        style = MaterialTheme.typography.bodyLarge,
+                        color = statusColor
+                    )
+                }
+                FilledTonalButton(onClick = onToggle) {
+                    Text(if (isRunning) "Stop" else "Start")
+                }
+            }
+
+            if (isRunning) {
+                Spacer(modifier = Modifier.height(8.dp))
+                Surface(
+                    shape = MaterialTheme.shapes.small,
+                    color = MaterialTheme.colorScheme.primaryContainer
+                ) {
+                    Text(
+                        text = "Listening for connections",
+                        modifier = Modifier.padding(horizontal = 8.dp, vertical = 4.dp),
+                        style = MaterialTheme.typography.labelSmall,
+                        color = MaterialTheme.colorScheme.onPrimaryContainer
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun AlarmCard(
+    alarm: AlarmEntity,
+    onDelete: () -> Unit,
+    modifier: Modifier = Modifier
+) {
+    Card(
+        modifier = modifier.fillMaxWidth(),
+        colors = CardDefaults.cardColors(
+            containerColor = MaterialTheme.colorScheme.surfaceVariant
+        )
+    ) {
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(16.dp),
+            horizontalArrangement = Arrangement.SpaceBetween,
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Column {
+                Text(
+                    text = String.format("%02d:%02d", alarm.hour, alarm.minute),
+                    style = MaterialTheme.typography.headlineMedium,
+                    fontWeight = FontWeight.Light,
+                    color = MaterialTheme.colorScheme.onSurface
+                )
+                if (alarm.label.isNotBlank()) {
+                    Text(
+                        text = alarm.label,
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant
+                    )
+                }
+            }
+            IconButton(onClick = onDelete) {
+                Icon(
+                    imageVector = Icons.Default.Delete,
+                    contentDescription = "Delete alarm",
+                    tint = MaterialTheme.colorScheme.error
+                )
+            }
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun AddAlarmDialog(
+    onDismiss: () -> Unit,
+    onConfirm: (hour: Int, minute: Int, label: String) -> Unit
+) {
+    val now = Calendar.getInstance()
+    val timePickerState = rememberTimePickerState(
+        initialHour = now.get(Calendar.HOUR_OF_DAY),
+        initialMinute = now.get(Calendar.MINUTE),
+        is24Hour = true
+    )
+    var label by remember { mutableStateOf("") }
+
+    Dialog(
+        onDismissRequest = onDismiss,
+        properties = DialogProperties(usePlatformDefaultWidth = false)
+    ) {
+        Surface(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(16.dp),
+            shape = MaterialTheme.shapes.extraLarge,
+            color = MaterialTheme.colorScheme.surface,
+            tonalElevation = 6.dp
+        ) {
+            Column(
+                modifier = Modifier.padding(24.dp),
+                horizontalAlignment = Alignment.CenterHorizontally
+            ) {
+                Text(
+                    text = "Set Alarm",
+                    style = MaterialTheme.typography.titleMedium,
+                    fontWeight = FontWeight.SemiBold,
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(bottom = 16.dp)
+                )
+
+                TimePicker(state = timePickerState)
+
+                Spacer(modifier = Modifier.height(16.dp))
+
+                OutlinedTextField(
+                    value = label,
+                    onValueChange = { label = it },
+                    label = { Text("Label (optional)") },
+                    singleLine = true,
+                    modifier = Modifier.fillMaxWidth()
+                )
+
+                Spacer(modifier = Modifier.height(24.dp))
+
+                Row(
+                    modifier = Modifier.fillMaxWidth(),
+                    horizontalArrangement = Arrangement.End
+                ) {
+                    TextButton(onClick = onDismiss) {
+                        Text("Cancel")
+                    }
+                    FilledTonalButton(
+                        onClick = {
+                            onConfirm(timePickerState.hour, timePickerState.minute, label.trim())
+                        },
+                        modifier = Modifier.padding(start = 8.dp)
+                    ) {
+                        Text("Set Alarm")
+                    }
+                }
+            }
+        }
+    }
+}

app/src/main/java/com/example/helios_alarm_clock/ui/MainViewModel.kt

@@ -0,0 +1,79 @@
+package com.example.helios_alarm_clock.ui
+
+import android.content.Context
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.example.helios_alarm_clock.data.AlarmDao
+import com.example.helios_alarm_clock.data.AlarmEntity
+import com.example.helios_alarm_clock.service.KtorService
+import com.example.helios_alarm_clock.util.AlarmScheduler
+import com.example.helios_alarm_clock.util.getLocalIpAddress
+import dagger.hilt.android.lifecycle.HiltViewModel
+import dagger.hilt.android.qualifiers.ApplicationContext
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.stateIn
+import kotlinx.coroutines.launch
+import java.util.Calendar
+import java.util.UUID
+import javax.inject.Inject
+
+@HiltViewModel
+class MainViewModel @Inject constructor(
+    private val alarmDao: AlarmDao,
+    private val alarmScheduler: AlarmScheduler,
+    @param:ApplicationContext private val context: Context
+) : ViewModel() {
+
+    val alarms: StateFlow<List<AlarmEntity>> = alarmDao.observeAll()
+        .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5000), emptyList())
+
+    private val _serverRunning = MutableStateFlow(false)
+    val serverRunning: StateFlow<Boolean> = _serverRunning.asStateFlow()
+
+    val ipAddress: String
+        get() = getLocalIpAddress() ?: "No network"
+
+    val port: Int = KtorService.PORT
+
+    fun startServer() {
+        KtorService.start(context)
+        _serverRunning.value = true
+    }
+
+    fun stopServer() {
+        KtorService.stop(context)
+        _serverRunning.value = false
+    }
+
+    fun createAlarm(hour: Int, minute: Int, label: String) {
+        viewModelScope.launch {
+            val now = Calendar.getInstance()
+            val trigger = Calendar.getInstance().apply {
+                set(Calendar.HOUR_OF_DAY, hour)
+                set(Calendar.MINUTE, minute)
+                set(Calendar.SECOND, 0)
+                set(Calendar.MILLISECOND, 0)
+                if (before(now)) add(Calendar.DAY_OF_YEAR, 1)
+            }
+            val entity = AlarmEntity(
+                id = UUID.randomUUID().toString(),
+                hour = hour,
+                minute = minute,
+                label = label,
+                triggerTimeMillis = trigger.timeInMillis
+            )
+            alarmDao.insert(entity)
+            alarmScheduler.schedule(entity)
+        }
+    }
+
+    fun deleteAlarm(alarm: AlarmEntity) {
+        viewModelScope.launch {
+            alarmScheduler.cancel(alarm)
+            alarmDao.deleteById(alarm.id)
+        }
+    }
+}

app/src/main/java/com/example/helios_alarm_clock/ui/theme/Color.kt

@@ -0,0 +1,23 @@
+package com.example.helios_alarm_clock.ui.theme
+
+import androidx.compose.ui.graphics.Color
+
+val Primary = Color(0xFFFFB74D)
+val OnPrimary = Color(0xFF1A1A1A)
+val PrimaryContainer = Color(0xFF3E2700)
+val OnPrimaryContainer = Color(0xFFFFDDB3)
+
+val Secondary = Color(0xFF90CAF9)
+val OnSecondary = Color(0xFF1A1A1A)
+val SecondaryContainer = Color(0xFF0D2B45)
+val OnSecondaryContainer = Color(0xFFD1E4FF)
+
+val Background = Color(0xFF121212)
+val OnBackground = Color(0xFFE6E1DC)
+val Surface = Color(0xFF1E1E1E)
+val SurfaceVariant = Color(0xFF2A2A2A)
+val OnSurface = Color(0xFFE6E1DC)
+val OnSurfaceVariant = Color(0xFFA0A0A0)
+
+val Error = Color(0xFFEF5350)
+val OnError = Color(0xFF1A1A1A)

app/src/main/java/com/example/helios_alarm_clock/ui/theme/Theme.kt

@@ -0,0 +1,33 @@
+package com.example.helios_alarm_clock.ui.theme
+
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.darkColorScheme
+import androidx.compose.runtime.Composable
+
+private val DarkColorScheme = darkColorScheme(
+    primary = Primary,
+    onPrimary = OnPrimary,
+    primaryContainer = PrimaryContainer,
+    onPrimaryContainer = OnPrimaryContainer,
+    secondary = Secondary,
+    onSecondary = OnSecondary,
+    secondaryContainer = SecondaryContainer,
+    onSecondaryContainer = OnSecondaryContainer,
+    background = Background,
+    onBackground = OnBackground,
+    surface = Surface,
+    surfaceVariant = SurfaceVariant,
+    onSurface = OnSurface,
+    onSurfaceVariant = OnSurfaceVariant,
+    error = Error,
+    onError = OnError
+)
+
+@Composable
+fun HeliosTheme(content: @Composable () -> Unit) {
+    MaterialTheme(
+        colorScheme = DarkColorScheme,
+        typography = HeliosTypography,
+        content = content
+    )
+}

app/src/main/java/com/example/helios_alarm_clock/ui/theme/Type.kt

@@ -0,0 +1,43 @@
+package com.example.helios_alarm_clock.ui.theme
+
+import androidx.compose.material3.Typography
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.sp
+
+val HeliosTypography = Typography(
+    headlineLarge = TextStyle(
+        fontWeight = FontWeight.Light,
+        fontSize = 32.sp,
+        lineHeight = 40.sp
+    ),
+    headlineMedium = TextStyle(
+        fontWeight = FontWeight.Light,
+        fontSize = 28.sp,
+        lineHeight = 36.sp
+    ),
+    titleMedium = TextStyle(
+        fontWeight = FontWeight.Medium,
+        fontSize = 16.sp,
+        lineHeight = 24.sp,
+        letterSpacing = 0.15.sp
+    ),
+    bodyLarge = TextStyle(
+        fontWeight = FontWeight.Normal,
+        fontSize = 16.sp,
+        lineHeight = 24.sp,
+        letterSpacing = 0.5.sp
+    ),
+    bodyMedium = TextStyle(
+        fontWeight = FontWeight.Normal,
+        fontSize = 14.sp,
+        lineHeight = 20.sp,
+        letterSpacing = 0.25.sp
+    ),
+    labelSmall = TextStyle(
+        fontWeight = FontWeight.Medium,
+        fontSize = 11.sp,
+        lineHeight = 16.sp,
+        letterSpacing = 0.5.sp
+    )
+)

app/src/main/java/com/example/helios_alarm_clock/util/AlarmScheduler.kt

@@ -0,0 +1,48 @@
+package com.example.helios_alarm_clock.util
+
+import android.app.AlarmManager
+import android.app.PendingIntent
+import android.content.Context
+import android.content.Intent
+import com.example.helios_alarm_clock.data.AlarmEntity
+import com.example.helios_alarm_clock.receiver.AlarmReceiver
+import dagger.hilt.android.qualifiers.ApplicationContext
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class AlarmScheduler @Inject constructor(
+    @param:ApplicationContext private val context: Context
+) {
+
+    fun schedule(alarm: AlarmEntity) {
+        val alarmManager = context.getSystemService(AlarmManager::class.java)
+        val intent = Intent(context, AlarmReceiver::class.java).apply {
+            putExtra(AlarmReceiver.EXTRA_ALARM_ID, alarm.id)
+            putExtra(AlarmReceiver.EXTRA_ALARM_LABEL, alarm.label)
+        }
+        val pendingIntent = PendingIntent.getBroadcast(
+            context,
+            alarm.id.hashCode(),
+            intent,
+            PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
+        )
+        alarmManager.setExactAndAllowWhileIdle(
+            AlarmManager.RTC_WAKEUP,
+            alarm.triggerTimeMillis,
+            pendingIntent
+        )
+    }
+
+    fun cancel(alarm: AlarmEntity) {
+        val alarmManager = context.getSystemService(AlarmManager::class.java)
+        val intent = Intent(context, AlarmReceiver::class.java)
+        val pendingIntent = PendingIntent.getBroadcast(
+            context,
+            alarm.id.hashCode(),
+            intent,
+            PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
+        )
+        alarmManager.cancel(pendingIntent)
+    }
+}

app/src/main/java/com/example/helios_alarm_clock/util/NetworkUtils.kt

@@ -0,0 +1,15 @@
+package com.example.helios_alarm_clock.util
+
+import java.net.Inet4Address
+import java.net.NetworkInterface
+
+fun getLocalIpAddress(): String? {
+    return try {
+        NetworkInterface.getNetworkInterfaces()?.toList()
+            ?.flatMap { it.inetAddresses.toList() }
+            ?.firstOrNull { !it.isLoopbackAddress && it is Inet4Address }
+            ?.hostAddress
+    } catch (_: Exception) {
+        null
+    }
+}

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/black" />
+    <foreground android:drawable="@mipmap/ic_launcher_foreground" />
+</adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@color/black" />
+    <foreground android:drawable="@mipmap/ic_launcher_foreground" />
+</adaptive-icon>

app/src/main/res/values-night/themes.xml

@@ -0,0 +1,7 @@
+<resources>
+    <style name="Theme.Heliosalarmclock" parent="android:Theme.Material.NoActionBar">
+        <item name="android:statusBarColor">#121212</item>
+        <item name="android:navigationBarColor">#121212</item>
+        <item name="android:windowBackground">#FF121212</item>
+    </style>
+</resources>

app/src/main/res/values/colors.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>

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

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">Helios Alarm</string>
+</resources>

app/src/main/res/values/themes.xml

@@ -0,0 +1,7 @@
+<resources>
+    <style name="Theme.Heliosalarmclock" parent="android:Theme.Material.NoActionBar">
+        <item name="android:statusBarColor">#121212</item>
+        <item name="android:navigationBarColor">#121212</item>
+        <item name="android:windowBackground">#FF121212</item>
+    </style>
+</resources>

app/src/main/res/xml/backup_rules.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample backup rules file; uncomment and customize as necessary.
+   See https://developer.android.com/guide/topics/data/autobackup
+   for details.
+   Note: This file is ignored for devices older than API 31
+   See https://developer.android.com/about/versions/12/backup-restore
+-->
+<full-backup-content>
+    <!--
+   <include domain="sharedpref" path="."/>
+   <exclude domain="sharedpref" path="device.xml"/>
+-->
+</full-backup-content>

app/src/main/res/xml/data_extraction_rules.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample data extraction rules file; uncomment and customize as necessary.
+   See https://developer.android.com/about/versions/12/backup-restore#xml-changes
+   for details.
+-->
+<data-extraction-rules>
+    <cloud-backup>
+        <!-- TODO: Use <include> and <exclude> to control what is backed up.
+        <include .../>
+        <exclude .../>
+        -->
+    </cloud-backup>
+    <!--
+    <device-transfer>
+        <include .../>
+        <exclude .../>
+    </device-transfer>
+    -->
+</data-extraction-rules>

app/src/test/java/com/example/helios_alarm_clock/ExampleUnitTest.kt

@@ -0,0 +1,17 @@
+package com.example.helios_alarm_clock
+
+import org.junit.Test
+
+import org.junit.Assert.*
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class ExampleUnitTest {
+    @Test
+    fun addition_isCorrect() {
+        assertEquals(4, 2 + 2)
+    }
+}