LibreTube/app/src/main/java/com/github/libretube/PlayerFragment.kt

package com.github.libretube

import android.annotation.SuppressLint
import android.os.Bundle
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.constraintlayout.motion.widget.MotionLayout
import androidx.recyclerview.widget.RecyclerView
import com.google.android.exoplayer2.ExoPlayer
import com.google.android.exoplayer2.MediaItem
import com.google.android.exoplayer2.MediaItem.SubtitleConfiguration
import com.google.android.exoplayer2.source.MediaSource

import com.google.android.exoplayer2.ui.StyledPlayerView

import java.io.IOException
import kotlin.math.abs
import com.google.android.exoplayer2.util.MimeTypes
import com.google.common.collect.ImmutableList
import android.app.ActionBar
import android.app.Activity
import android.content.Context
import android.content.DialogInterface
import android.content.pm.ActivityInfo
import android.widget.*
import androidx.core.net.toUri
import com.google.android.exoplayer2.MediaItem.fromUri
import com.google.android.exoplayer2.source.MergingMediaSource
import com.google.android.exoplayer2.source.ProgressiveMediaSource
import com.google.android.exoplayer2.upstream.DataSource

import com.google.android.exoplayer2.upstream.DefaultHttpDataSource
import android.widget.TextView

import android.os.Build
import android.text.Html
import android.util.Log
import android.util.TypedValue
import androidx.appcompat.app.AlertDialog
import androidx.constraintlayout.widget.ConstraintLayout
import androidx.core.os.bundleOf
import androidx.lifecycle.lifecycleScope
import androidx.recyclerview.widget.GridLayoutManager

import com.google.android.exoplayer2.Player
import com.google.android.exoplayer2.source.DefaultMediaSourceFactory

import com.squareup.picasso.Picasso
import retrofit2.HttpException
import com.github.libretube.adapters.TrendingAdapter
import com.github.libretube.obj.PipedStream
import com.github.libretube.obj.Subscribe
import com.google.android.material.button.MaterialButton


var isFullScreen = false
class PlayerFragment : Fragment() {

    private val TAG = "PlayerFragment"
    private var videoId: String? = null
    private var param2: String? = null
    private var lastProgress: Float = 0.toFloat()
    private var sId: Int=0
    private var eId: Int=0
    private var paused =false
    private var whichQuality = 0

    var isSubscribed: Boolean =false

    private lateinit var relatedRecView: RecyclerView
    private lateinit var exoPlayerView: StyledPlayerView
    private lateinit var motionLayout: MotionLayout
    private lateinit var exoPlayer: ExoPlayer
    private lateinit var mediaSource: MediaSource

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        arguments?.let {
            videoId = it.getString("videoId")
        }
    }

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_player, container, false)
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        val mainActivity = activity as MainActivity
        mainActivity.findViewById<FrameLayout>(R.id.container).visibility=View.VISIBLE
        val playerMotionLayout = view.findViewById<MotionLayout>(R.id.playerMotionLayout)
        motionLayout = playerMotionLayout
        exoPlayerView = view.findViewById(R.id.player)
        view.findViewById<TextView>(R.id.player_description).text = videoId
        playerMotionLayout.addTransitionListener(object: MotionLayout.TransitionListener {
            override fun onTransitionStarted(
                motionLayout: MotionLayout?,
                startId: Int,
                endId: Int
            ) {

            }

            override fun onTransitionChange(motionLayout: MotionLayout?, startId: Int, endId: Int, progress: Float) {
                val mainActivity = activity as MainActivity
                val mainMotionLayout = mainActivity.findViewById<MotionLayout>(R.id.mainMotionLayout)
                mainMotionLayout.progress = abs(progress)
                eId=endId
                sId=startId

            }

            override fun onTransitionCompleted(motionLayout: MotionLayout?, currentId: Int) {
                println(currentId)
                val mainActivity = activity as MainActivity
                val mainMotionLayout = mainActivity.findViewById<MotionLayout>(R.id.mainMotionLayout)
                if (currentId==eId) {
                    view.findViewById<ImageButton>(R.id.quality_select).visibility =View.GONE
                    view.findViewById<ImageButton>(R.id.close_imageButton).visibility =View.GONE
                    view.findViewById<TextView>(R.id.quality_text).visibility =View.GONE
                    mainMotionLayout.progress = 1.toFloat()
                }else if(currentId==sId){
                    view.findViewById<ImageButton>(R.id.quality_select).visibility =View.VISIBLE
                    view.findViewById<ImageButton>(R.id.close_imageButton).visibility =View.VISIBLE
                    view.findViewById<TextView>(R.id.quality_text).visibility =View.VISIBLE
                    mainMotionLayout.progress = 0.toFloat()
                }

            }

            override fun onTransitionTrigger(
                motionLayout: MotionLayout?,
                triggerId: Int,
                positive: Boolean,
                progress: Float
            ) {


            }
        })
        playerMotionLayout.progress=1.toFloat()
        playerMotionLayout.transitionToStart()
        fetchJson(view)
        view.findViewById<ImageView>(R.id.close_imageView).setOnClickListener{
            motionLayout.transitionToEnd()
            val mainActivity = activity as MainActivity
            mainActivity.requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT
            mainActivity.supportFragmentManager.beginTransaction()
                .remove(this)
                .commit()

        }
        view.findViewById<ImageButton>(R.id.close_imageButton).setOnClickListener{
            motionLayout.transitionToEnd()
            val mainActivity = activity as MainActivity
            mainActivity.requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT
            mainActivity.supportFragmentManager.beginTransaction()
                .remove(this)
                .commit()
        }
        val playImageView = view.findViewById<ImageView>(R.id.play_imageView)
        playImageView.setOnClickListener{
            paused = if(paused){
                playImageView.setImageResource(R.drawable.ic_pause)
                exoPlayer.play()
                false
            }else {
                playImageView.setImageResource(R.drawable.ic_play)
                exoPlayer.pause()
                true
            }
        }
        //FullScreen button trigger
        view.findViewById<ImageButton>(R.id.fullscreen).setOnClickListener{
            //remember to hide everything when new thing added
            if (!isFullScreen){
                with(motionLayout) {
                    getConstraintSet(R.id.start).constrainHeight(R.id.player, -1)
                    enableTransition(R.id.yt_transition,false)
                }
                view.findViewById<ConstraintLayout>(R.id.main_container).isClickable =true
                view.findViewById<LinearLayout>(R.id.linLayout).visibility=View.GONE
                val mainActivity = activity as MainActivity
                mainActivity.requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED
                isFullScreen=true

            }else{
                with(motionLayout) {
                    getConstraintSet(R.id.start).constrainHeight(R.id.player, 0)
                    enableTransition(R.id.yt_transition,true)
                }
                view.findViewById<ConstraintLayout>(R.id.main_container).isClickable =false
                view.findViewById<LinearLayout>(R.id.linLayout).visibility=View.VISIBLE
                val mainActivity = activity as MainActivity
                mainActivity.requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT
                isFullScreen=false
            }

        }
        relatedRecView = view.findViewById(R.id.player_recView)
        relatedRecView.layoutManager = GridLayoutManager(view.context, resources.getInteger(R.integer.grid_items))


    }


    override fun onStop() {
        super.onStop()
    }

    override fun onDestroy() {
        super.onDestroy()
        try {
            exoPlayer.stop()
        }catch (e: Exception){}
    }


    private fun fetchJson(view: View) {
        fun run() {
            lifecycleScope.launchWhenCreated {
                val response = try {
                    RetrofitInstance.api.getStreams(videoId!!)
                } catch(e: IOException) {
                    println(e)
                    Log.e(TAG, "IOException, you might not have internet connection")
                    return@launchWhenCreated
                } catch (e: HttpException) {
                    Log.e(TAG, "HttpException, unexpected response")
                    return@launchWhenCreated
                }
                var videosNameArray: Array<CharSequence> = arrayOf()
                videosNameArray += "HLS"
                for (vid in response.videoStreams!!){
                    val name = vid.quality +" "+ vid.format
                    videosNameArray += name
                }
                runOnUiThread {
                    var subtitle = mutableListOf<SubtitleConfiguration>()
                    if(response.subtitles!!.isNotEmpty()){
                        subtitle?.add(SubtitleConfiguration.Builder(response.subtitles!![0].url!!.toUri())
                            .setMimeType(response.subtitles!![0].mimeType!!) // The correct MIME type (required).
                            .setLanguage(response.subtitles!![0].code) // The subtitle language (optional).
                            .build())}
                    val mediaItem: MediaItem = MediaItem.Builder()
                        .setUri(response.hls)
                        .setSubtitleConfigurations(subtitle)
                        .build()
                    exoPlayer = ExoPlayer.Builder(view.context)
                        .setSeekBackIncrementMs(5000)
                        .setSeekForwardIncrementMs(5000)
                        .build()
                    exoPlayerView.setShowSubtitleButton(true)
                    exoPlayerView.setShowNextButton(false)
                    exoPlayerView.setShowPreviousButton(false)
                    //exoPlayerView.controllerShowTimeoutMs = 1500
                    exoPlayerView.controllerHideOnTouch = true
                    exoPlayerView.player = exoPlayer
                    exoPlayer.setMediaItem(mediaItem)
                    ///exoPlayer.getMediaItemAt(5)
                    exoPlayer.prepare()
                    exoPlayer.play()

                    view.findViewById<TextView>(R.id.title_textView).text = response.title

                    view.findViewById<ImageButton>(R.id.quality_select).setOnClickListener{
                        //Dialog for quality selection
                        val builder: AlertDialog.Builder? = activity?.let {
                            AlertDialog.Builder(it)
                        }
                        builder!!.setTitle(R.string.choose_quality_dialog)
                            .setItems(videosNameArray,
                                DialogInterface.OnClickListener { _, which ->
                                    whichQuality = which
                                    if(response.subtitles!!.isNotEmpty()) {
                                        var subtitle =
                                            mutableListOf<SubtitleConfiguration>()
                                        subtitle?.add(
                                            SubtitleConfiguration.Builder(response.subtitles!![0].url!!.toUri())
                                                .setMimeType(response.subtitles!![0].mimeType!!) // The correct MIME type (required).
                                                .setLanguage(response.subtitles!![0].code) // The subtitle language (optional).
                                                .build()
                                        )
                                    }
                                    if(which==0){
                                        val mediaItem: MediaItem = MediaItem.Builder()
                                            .setUri(response.hls)
                                            .setSubtitleConfigurations(subtitle)
                                            .build()
                                        exoPlayer.setMediaItem(mediaItem)
                                    }else{
                                        val dataSourceFactory: DataSource.Factory =
                                            DefaultHttpDataSource.Factory()
                                        val videoItem: MediaItem = MediaItem.Builder()
                                            .setUri(response.videoStreams[which-1].url)
                                            .setSubtitleConfigurations(subtitle)
                                            .build()
                                        val videoSource: MediaSource = DefaultMediaSourceFactory(dataSourceFactory)
                                            .createMediaSource(videoItem)
                                        var audioSource: MediaSource = DefaultMediaSourceFactory(dataSourceFactory)
                                            .createMediaSource(fromUri(response.audioStreams!![0].url!!))
                                        if (response.videoStreams[which-1].quality=="720p" || response.videoStreams[which-1].quality=="1080p" || response.videoStreams[which-1].quality=="480p" ){
                                            audioSource = ProgressiveMediaSource.Factory(dataSourceFactory)
                                                .createMediaSource(fromUri(response.audioStreams!![getMostBitRate(response.audioStreams)].url!!))
                                        }
                                        val mergeSource: MediaSource = MergingMediaSource(videoSource,audioSource)
                                        exoPlayer.setMediaSource(mergeSource)
                                    }
                                    view.findViewById<TextView>(R.id.quality_text).text=videosNameArray[which]
                                })
                        val dialog: AlertDialog? = builder?.create()
                        dialog?.show()
                    }
                    //Listener for play and pause icon change
                    exoPlayer!!.addListener(object : com.google.android.exoplayer2.Player.Listener {
                        override fun onPlayerStateChanged(playWhenReady: Boolean,playbackState: Int) {

                            exoPlayerView.keepScreenOn = !(playbackState == Player.STATE_IDLE || playbackState == Player.STATE_ENDED ||
                                    !playWhenReady)

                            if (playWhenReady && playbackState == Player.STATE_READY) {
                                // media actually playing
                                view.findViewById<ImageView>(R.id.play_imageView).setImageResource(R.drawable.ic_pause)
                            } else if (playWhenReady) {
                                // might be idle (plays after prepare()),
                                // buffering (plays when data available)
                                // or ended (plays when seek away from end)
                                view.findViewById<ImageView>(R.id.play_imageView).setImageResource(R.drawable.ic_play)
                            } else {
                                // player paused in any state
                                view.findViewById<ImageView>(R.id.play_imageView).setImageResource(R.drawable.ic_play)
                            }
                        }
                    })
                    relatedRecView.adapter = TrendingAdapter(response.relatedStreams!!)
                    view.findViewById<TextView>(R.id.player_description).text = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
                        Html.fromHtml(response.description, Html.FROM_HTML_MODE_COMPACT)
                    } else {
                        Html.fromHtml(response.description)
                    }
                    view.findViewById<TextView>(R.id.player_sub).text = response.views.formatShort() + " views • "+response.uploadDate
                    view.findViewById<TextView>(R.id.textLike).text = response.likes.formatShort()
                    val channelImage = view.findViewById<ImageView>(R.id.player_channelImage)
                    Picasso.get().load(response.uploaderAvatar).into(channelImage)
                    view.findViewById<TextView>(R.id.player_channelName).text=response.uploader
                    view.findViewById<RelativeLayout>(R.id.player_channel).setOnClickListener {

                        val activity = view.context as MainActivity
                        val bundle = bundleOf("channel_id" to response.uploaderUrl)
                        activity.navController.navigate(R.id.channel,bundle)
                        activity.findViewById<MotionLayout>(R.id.mainMotionLayout).transitionToEnd()
                        view.findViewById<MotionLayout>(R.id.playerMotionLayout).transitionToEnd()
                    }
                    val sharedPref = context?.getSharedPreferences("token", Context.MODE_PRIVATE)
                    if(sharedPref?.getString("token","")!=""){
                        val channelId = response.uploaderUrl?.replace("/channel/","")
                        val subButton = view.findViewById<MaterialButton>(R.id.player_subscribe)
                        isSubscribed(subButton, channelId!!)
                    }
                }
            }

        }
        run()

    }

    private fun isSubscribed(button: MaterialButton, channel_id: String){
        @SuppressLint("ResourceAsColor")
        fun run() {
            lifecycleScope.launchWhenCreated {
                val response = try {
                    val sharedPref = context?.getSharedPreferences("token", Context.MODE_PRIVATE)
                    RetrofitInstance.api.isSubscribed(channel_id,sharedPref?.getString("token","")!!)
                }catch(e: IOException) {
                    println(e)
                    Log.e(TAG, "IOException, you might not have internet connection")
                    return@launchWhenCreated
                } catch (e: HttpException) {
                    Log.e(TAG, "HttpException, unexpected response")
                    return@launchWhenCreated
                }
                val colorPrimary = TypedValue()
                (context as Activity).theme.resolveAttribute(
                    android.R.attr.colorPrimary,
                    colorPrimary,
                    true)

                val ColorText = TypedValue()
                (context as Activity).theme.resolveAttribute(
                    R.attr.colorOnSurface,
                    ColorText,
                    true)

                runOnUiThread {
                    if (response.subscribed==true){
                        isSubscribed=true
                        button.text=getString(R.string.unsubscribe)
                        button.setTextColor(ColorText.data)
                    }
                    if(response.subscribed!=null){
                    button.setOnClickListener {
                        if(isSubscribed){
                            unsubscribe(channel_id)
                            button.text=getString(R.string.subscribe)
                            button.setTextColor(colorPrimary.data)

                        }else{
                            subscribe(channel_id)
                            button.text=getString(R.string.unsubscribe)
                            button.setTextColor(colorPrimary.data)
                        }
                    }}
                }
            }
        }
        run()
    }

    private fun subscribe(channel_id: String){
        fun run() {
            lifecycleScope.launchWhenCreated {
                val response = try {
                    val sharedPref = context?.getSharedPreferences("token", Context.MODE_PRIVATE)
                    RetrofitInstance.api.subscribe(sharedPref?.getString("token","")!!, Subscribe(channel_id))
                }catch(e: IOException) {
                    println(e)
                    Log.e(TAG, "IOException, you might not have internet connection")
                    return@launchWhenCreated
                } catch (e: HttpException) {
                    Log.e(TAG, "HttpException, unexpected response$e")
                    return@launchWhenCreated
                }
                isSubscribed=true
            }
        }
        run()
    }
    private fun unsubscribe(channel_id: String){
        fun run() {
            lifecycleScope.launchWhenCreated {
                val response = try {
                    val sharedPref = context?.getSharedPreferences("token", Context.MODE_PRIVATE)
                    RetrofitInstance.api.unsubscribe(sharedPref?.getString("token","")!!, Subscribe(channel_id))
                }catch(e: IOException) {
                    println(e)
                    Log.e(TAG, "IOException, you might not have internet connection")
                    return@launchWhenCreated
                } catch (e: HttpException) {
                    Log.e(TAG, "HttpException, unexpected response")
                    return@launchWhenCreated
                }
                isSubscribed=false
            }
        }
        run()
    }


    private fun Fragment?.runOnUiThread(action: () -> Unit) {
        this ?: return
        if (!isAdded) return // Fragment not attached to an Activity
        activity?.runOnUiThread(action)
    }

     private fun getMostBitRate(audios: List<PipedStream>):Int{
        var bitrate =0
        var index = 0
        for ((i, audio) in audios.withIndex()){
            val q = audio.quality!!.replace(" kbps","").toInt()
            if (q>bitrate){
                bitrate=q
                index = i
            }
        }
        return index
    }

    override fun onResume() {
        super.onResume()
    }

}