package org.mosad.teapod

import android.net.Uri
import android.os.Bundle
import android.view.View
import androidx.appcompat.app.AppCompatActivity
import com.google.android.exoplayer2.ExoPlayer
import com.google.android.exoplayer2.MediaItem
import com.google.android.exoplayer2.Player
import com.google.android.exoplayer2.SimpleExoPlayer
import com.google.android.exoplayer2.source.hls.HlsMediaSource
import com.google.android.exoplayer2.upstream.DataSource
import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory
import com.google.android.exoplayer2.util.Util
import kotlinx.android.synthetic.main.activity_player.*


class PlayerActivity : AppCompatActivity() {

    private lateinit var player: SimpleExoPlayer
    private lateinit var dataSourceFactory: DataSource.Factory

    private var streamUrl = ""

    private var playWhenReady = true
    private var currentWindow = 0
    private var playbackPosition: Long = 0

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_player)

        streamUrl = intent.getStringExtra("streamUrl").toString()
    }


    override fun onStart() {
        super.onStart()
        if (Util.SDK_INT > 23) {
            initPlayer()
            if (video_view != null) video_view.onResume()
        }
    }

    override fun onResume() {
        super.onResume()
        if (Util.SDK_INT <= 23) {
            initPlayer()
            if (video_view != null) video_view.onResume()
        }
    }

    override fun onPause() {
        super.onPause()
        if (Util.SDK_INT <= 23) {
            if (video_view != null) video_view.onPause()
            releasePlayer()
        }
    }

    override fun onStop() {
        super.onStop()
        if (Util.SDK_INT > 23) {
            if (video_view != null) video_view.onPause()
            releasePlayer()
        }
    }

    private fun initPlayer() {
        if (streamUrl.isEmpty()) {
            println("no streamUrl set")
            return
        }

        player = SimpleExoPlayer.Builder(this).build()
        dataSourceFactory = DefaultDataSourceFactory(this, Util.getUserAgent(this, "Teapod"))

        val mediaSource = HlsMediaSource.Factory(dataSourceFactory)
            .createMediaSource(MediaItem.fromUri(Uri.parse(streamUrl)))

        player.setMediaSource(mediaSource)
        player.prepare()
        player.play()

        player.addListener(object : Player.EventListener {
            override fun onPlaybackStateChanged(state: Int) {
                super.onPlaybackStateChanged(state)

                loading.visibility = when (state) {
                    ExoPlayer.STATE_READY ->  View.GONE
                    ExoPlayer.STATE_BUFFERING -> View.VISIBLE
                    else -> View.GONE
                }
            }
        })

        video_view.player = player
    }

    private fun releasePlayer(){
        playbackPosition = player.currentPosition
        currentWindow = player.currentWindowIndex
        playWhenReady = player.playWhenReady
        player.release()
    }

}