package com.github.libretube

import android.app.*
import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.content.IntentFilter
import android.graphics.Color
import android.net.Uri
import android.os.Build
import android.os.Environment
import android.os.IBinder
import android.util.Log
import androidx.core.app.NotificationCompat
import androidx.core.app.NotificationManagerCompat
import com.arthenica.ffmpegkit.FFmpegKit
import java.io.File


var IS_DOWNLOAD_RUNNING = false
class DownloadService : Service(){
    val TAG = "DownloadService"
    private var downloadId: Long =-1
    private lateinit var videoId: String
    private lateinit var videoUrl: String
    private lateinit var audioUrl: String
    private lateinit var extension: String
    private var duration: Int = 0
    //private lateinit var command: String
    private lateinit var audioDir: File
    private lateinit var videoDir: File
    lateinit var service: NotificationManager
    lateinit var notification: NotificationCompat.Builder
    override fun onCreate() {
        super.onCreate()
        IS_DOWNLOAD_RUNNING = true
    }

    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
        videoId = intent?.getStringExtra("videoId")!!
        videoUrl = intent.getStringExtra("videoUrl")!!
        audioUrl = intent.getStringExtra("audioUrl")!!
        extension = intent.getStringExtra("extension")!!
        //command = intent.getStringExtra("command")!!
        duration = intent.getIntExtra("duration",1)
        service = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
               val channelId =
                   if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                       val chan = NotificationChannel("service",
                           "DownloadService", NotificationManager.IMPORTANCE_NONE)
                       chan.lightColor = Color.BLUE
                       chan.lockscreenVisibility = Notification.VISIBILITY_PRIVATE
                       service.createNotificationChannel(chan)
                       "service"
                   } else {
                       // If earlier version channel ID is not used
                       // https://developer.android.com/reference/android/support/v4/app/NotificationCompat.Builder.html#NotificationCompat.Builder(android.content.Context)
                       ""
                   }
        var pendingIntent: PendingIntent? = null
        pendingIntent = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
            PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_MUTABLE)
        } else {
            PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_ONE_SHOT)
        }
        //Creating a notification and setting its various attributes
        notification =
            NotificationCompat.Builder(this@DownloadService, channelId)
                .setSmallIcon(R.drawable.ic_download)
                .setContentTitle("LibreTube")
                .setContentText("Downloading")
                .setPriority(NotificationCompat.PRIORITY_LOW)
                .setOngoing(true)
                .setOnlyAlertOnce(true)
                .setProgress(100, 0, true)
                .setContentIntent(pendingIntent)
                .setAutoCancel(true)
        startForeground(1,notification.build())
        downloadManager()

        return super.onStartCommand(intent, flags, startId)
    }
    override fun onBind(intent: Intent?): IBinder? {
        TODO("Not yet implemented")
    }

    private fun downloadManager() {
        val path = applicationContext.getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS)
        val folder_main = ".tmp"
        val f = File(path, folder_main)
        if (!f.exists()) {
            f.mkdirs()
            Log.e(TAG, "Directory make")
        } else {
            f.deleteRecursively()
            f.mkdirs()
            Log.e(TAG, "Directory already have")
        }
        audioDir = File(f, "$videoId-audio")
        videoDir = File(f, "$videoId-video")
        try {
            Log.e(TAG, "Directory make")
            registerReceiver(onDownloadComplete, IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE))
            val request: DownloadManager.Request =
                DownloadManager.Request(Uri.parse(videoUrl))
                    .setTitle("Video") // Title of the Download Notification
                    .setDescription("Downloading") // Description of the Download Notification
                    .setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE) // Visibility of the download Notification
                    .setDestinationUri(Uri.fromFile(videoDir))
                    .setAllowedOverMetered(true) // Set if download is allowed on Mobile network
                    .setAllowedOverRoaming(true) //
            val downloadManager: DownloadManager =
                applicationContext.getSystemService(DOWNLOAD_SERVICE) as DownloadManager
            downloadId = downloadManager.enqueue(request)
            if(audioUrl==""){downloadId = 0L}
        } catch (e: IllegalArgumentException) {
            Log.e(TAG, "download error $e")
            try{
                downloadId = 0L
                val request: DownloadManager.Request =
                    DownloadManager.Request(Uri.parse(audioUrl))
                        .setTitle("Audio") // Title of the Download Notification
                        .setDescription("Downloading") // Description of the Download Notification
                        .setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE) // Visibility of the download Notification
                        .setDestinationUri(Uri.fromFile(audioDir))
                        .setAllowedOverMetered(true) // Set if download is allowed on Mobile network
                        .setAllowedOverRoaming(true) //
                val downloadManager: DownloadManager =
                    applicationContext.getSystemService(DOWNLOAD_SERVICE) as DownloadManager
                downloadManager.enqueue(request)

            }catch (e: Exception){
                Log.e(TAG, "audio download error $e")
                stopService(Intent(this,DownloadService::class.java))}

        }
    }

    private val onDownloadComplete: BroadcastReceiver = object : BroadcastReceiver() {
        override fun onReceive(context: Context, intent: Intent) {
            //Fetching the download id received with the broadcast
            val id = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1)
            //Checking if the received broadcast is for our enqueued download by matching download id
            if (downloadId == id) {
                downloadId=0L
                try{
                val request: DownloadManager.Request =
                    DownloadManager.Request(Uri.parse(audioUrl))
                        .setTitle("Audio") // Title of the Download Notification
                        .setDescription("Downloading") // Description of the Download Notification
                        .setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE) // Visibility of the download Notification
                        .setDestinationUri(Uri.fromFile(audioDir))
                        .setAllowedOverMetered(true) // Set if download is allowed on Mobile network
                        .setAllowedOverRoaming(true) //
                val downloadManager: DownloadManager =
                    applicationContext.getSystemService(DOWNLOAD_SERVICE) as DownloadManager
                downloadManager.enqueue(request)
                }catch (e: Exception){}
            }else if (downloadId == 0L){
                val libreTube = File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS),"LibreTube")
                if (!libreTube.exists()) {
                    libreTube.mkdirs()
                    Log.e(TAG, "libreTube Directory make")
                } else {
                    Log.e(TAG, "libreTube Directory already have")
                }
                var command: String = when {
                    videoUrl=="" -> {
                        "-y -i $audioDir -c copy ${libreTube}/${videoId}-audio$extension"
                    }
                    audioUrl=="" -> {
                        "-y -i $videoDir -c copy ${libreTube}/${videoId}-video$extension"
                    }
                    else -> {
                        "-y -i $videoDir -i $audioDir -c copy ${libreTube}/${videoId}$extension"
                    }
                }
                notification.setContentTitle("Muxing")
                FFmpegKit.executeAsync(command,
                    { session ->
                        val state = session.state
                        val returnCode = session.returnCode
                        // CALLED WHEN SESSION IS EXECUTED
                        Log.d(
                            TAG,
                            String.format(
                                "FFmpeg process exited with state %s and rc %s.%s",
                                state,
                                returnCode,
                                session.failStackTrace
                            )
                        )
                        val path = applicationContext.getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS)
                        val folder_main = ".tmp"
                        val f = File(path, folder_main)
                        f.deleteRecursively()
                        if (returnCode.toString()!="0"){
                            var builder = NotificationCompat.Builder(this@DownloadService, "failed")
                                .setSmallIcon(R.drawable.ic_download)
                                .setContentTitle(resources.getString(R.string.downloadfailed))
                                .setContentText("failure")
                                .setPriority(NotificationCompat.PRIORITY_HIGH)
                            createNotificationChannel()
                            with(NotificationManagerCompat.from(this@DownloadService)) {
                                // notificationId is a unique int for each notification that you must define
                                notify(69, builder.build())
                            }
                        }
                        stopForeground(true)
                        stopService(Intent(this@DownloadService,DownloadService::class.java))
                    }, {
                        // CALLED WHEN SESSION PRINTS LOGS
                        Log.e(TAG,it.message.toString())
                    }) {
                    // CALLED WHEN SESSION GENERATES STATISTICS
                    Log.e(TAG+"stat",it.time.toString())
                    /*val progress = it.time/(10*duration!!)
                    if (progress<1){
                        notification
                            .setProgress(progressMax, progress.toInt(), false)
                        service.notify(1,notification.build())
                    }*/
                }

            }
        }
    }

    private fun createNotificationChannel() {
        // Create the NotificationChannel, but only on API 26+ because
        // the NotificationChannel class is new and not in the support library
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            val name = "failed"
            val descriptionText = "Download Failed"
            val importance = NotificationManager.IMPORTANCE_DEFAULT
            val channel = NotificationChannel("failed", name, importance).apply {
                description = descriptionText
            }
            // Register the channel with the system
            val notificationManager: NotificationManager =
                getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
            notificationManager.createNotificationChannel(channel)
        }
    }
    override fun onDestroy() {
        try {
            unregisterReceiver(onDownloadComplete)
        }catch (e: Exception){}
        IS_DOWNLOAD_RUNNING = false
        Log.d(TAG,"dl finished!")
        super.onDestroy()
    }

}