package expo.modules.gaodemap.map.services

import android.annotation.SuppressLint
import android.app.Notification
import android.app.NotificationChannel
import android.app.NotificationManager
import android.app.Service
import android.content.Context
import android.content.Intent
import android.os.Build
import android.os.IBinder
import androidx.core.app.NotificationCompat

/**
 * 定位前台服务
 * 用于支持 Android 后台定位
 */
class LocationForegroundService : Service() {
    
    companion object {
        private const val NOTIFICATION_ID = 1001
        private const val CHANNEL_ID = "location_service_channel"
        private const val CHANNEL_NAME = "定位服务"
        
        fun start(context: Context) {
            val intent = Intent(context, LocationForegroundService::class.java)
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                context.startForegroundService(intent)
            } else {
                context.startService(intent)
            }
        }
        
        fun stop(context: Context) {
            val intent = Intent(context, LocationForegroundService::class.java)
            context.stopService(intent)
        }
    }
    
    @SuppressLint("ForegroundServiceType")
    override fun onCreate() {
        super.onCreate()
        createNotificationChannel()
        startForeground(NOTIFICATION_ID, createNotification())
    }
    
    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
        return START_STICKY
    }
    
    override fun onBind(intent: Intent?): IBinder? = null
    
    private fun createNotificationChannel() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            val channel = NotificationChannel(
                CHANNEL_ID,
                CHANNEL_NAME,
                NotificationManager.IMPORTANCE_LOW
            ).apply {
                description = "后台定位服务通知"
                setShowBadge(false)
            }
            
            val manager = getSystemService(NOTIFICATION_SERVICE) as NotificationManager
            manager.createNotificationChannel(channel)
        }
    }
    
    private fun createNotification(): Notification {
        val builder = NotificationCompat.Builder(this, CHANNEL_ID)
            .setContentTitle("定位服务运行中")
            .setContentText("正在后台获取位置信息")
            .setSmallIcon(android.R.drawable.ic_menu_mylocation)
            .setPriority(NotificationCompat.PRIORITY_LOW)
            .setOngoing(true)
        
        return builder.build()
    }
}