package com.example.godeye.managers

import android.content.Context
import com.example.godeye.models.AppError
import com.example.godeye.models.WebRTCConnectionState
import com.example.godeye.utils.Constants
import com.example.godeye.utils.Logger
import kotlinx.coroutines.flow.MutableStateFlow
import kotlinx.coroutines.flow.StateFlow
import kotlinx.coroutines.flow.asStateFlow

/**
 * Менеджер для управления WebRTC соединениями (заглушка)
 * В реальном проекте здесь будет полная реализация с WebRTC библиотекой
 */
class WebRTCManager(private val context: Context) {

    private val _connectionState = MutableStateFlow(WebRTCConnectionState.NEW)
    val connectionState: StateFlow<WebRTCConnectionState> = _connectionState.asStateFlow()

    private val _error = MutableStateFlow<AppError?>(null)
    val error: StateFlow<AppError?> = _error.asStateFlow()

    // Callback для передачи событий WebRTC
    private var onOfferCreated: ((String) -> Unit)? = null
    private var onAnswerCreated: ((String) -> Unit)? = null
    private var onIceCandidateCreated: ((String, String, Int) -> Unit)? = null

    /**
     * Инициализация WebRTC (заглушка)
     */
    fun initialize() {
        try {
            Logger.d("WebRTC initialized (stub implementation)")
        } catch (e: Exception) {
            Logger.e("Error initializing WebRTC", e)
            _error.value = AppError.WebRTCConnectionFailed
        }
    }

    /**
     * Создать PeerConnection (заглушка)
     */
    fun createPeerConnection(
        onOfferCreated: (String) -> Unit,
        onAnswerCreated: (String) -> Unit,
        onIceCandidateCreated: (String, String, Int) -> Unit
    ) {
        try {
            this.onOfferCreated = onOfferCreated
            this.onAnswerCreated = onAnswerCreated
            this.onIceCandidateCreated = onIceCandidateCreated

            Logger.d("PeerConnection created (stub implementation)")
        } catch (e: Exception) {
            Logger.e("Error creating PeerConnection", e)
            _error.value = AppError.WebRTCConnectionFailed
        }
    }

    /**
     * Создать локальные медиа треки (заглушка)
     */
    fun createLocalMediaTracks(cameraType: String) {
        try {
            Logger.d("Local media tracks created for $cameraType (stub implementation)")
        } catch (e: Exception) {
            Logger.e("Error creating local media tracks", e)
            _error.value = AppError.WebRTCConnectionFailed
        }
    }

    /**
     * Создать Offer (заглушка)
     */
    fun createOffer() {
        try {
            // Симулируем создание offer
            val mockOffer = "v=0\r\no=- 123456 2 IN IP4 127.0.0.1\r\ns=-\r\nt=0 0\r\nm=video 9 UDP/TLS/RTP/SAVPF 96\r\nc=IN IP4 127.0.0.1\r\na=rtcp:9 IN IP4 127.0.0.1"
            onOfferCreated?.invoke(mockOffer)
            Logger.d("Offer created (stub implementation)")

            // Симулируем успешное соединение через некоторое время
            _connectionState.value = WebRTCConnectionState.CONNECTED
        } catch (e: Exception) {
            Logger.e("Error creating offer", e)
            _error.value = AppError.WebRTCConnectionFailed
        }
    }

    /**
     * Обработать Answer (заглушка)
     */
    fun handleAnswer(answerSdp: String) {
        try {
            Logger.d("Answer processed (stub implementation): ${answerSdp.take(50)}...")
            _connectionState.value = WebRTCConnectionState.CONNECTED
        } catch (e: Exception) {
            Logger.e("Error handling answer", e)
            _error.value = AppError.WebRTCConnectionFailed
        }
    }

    /**
     * Добавить ICE candidate (заглушка)
     */
    fun addIceCandidate(candidateSdp: String, sdpMid: String, sdpMLineIndex: Int) {
        try {
            Logger.d("ICE candidate added (stub implementation): $candidateSdp")
        } catch (e: Exception) {
            Logger.e("Error adding ICE candidate", e)
        }
    }

    /**
     * Переключить камеру (заглушка)
     */
    fun switchCamera(newCameraType: String) {
        try {
            Logger.d("Camera switched to: $newCameraType (stub implementation)")
        } catch (e: Exception) {
            Logger.e("Error switching camera", e)
            _error.value = AppError.CameraError("Failed to switch camera: ${e.message}")
        }
    }

    /**
     * Закрыть WebRTC соединение (заглушка)
     */
    fun close() {
        try {
            _connectionState.value = WebRTCConnectionState.CLOSED
            Logger.d("WebRTC connection closed (stub implementation)")
        } catch (e: Exception) {
            Logger.e("Error closing WebRTC connection", e)
        }
    }

    /**
     * Очистить ошибку
     */
    fun clearError() {
        _error.value = null
    }
}
