package com.shuyu.gsyvideoplayer;


import android.content.Context;
import android.media.AudioManager;
import android.net.Uri;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Looper;
import android.os.Message;
import android.text.TextUtils;
import android.view.Surface;

import com.danikula.videocache.HttpProxyCacheServer;
import com.shuyu.gsyvideoplayer.listener.GSYMediaPlayerListener;
import com.shuyu.gsyvideoplayer.model.GSYModel;

import java.lang.ref.WeakReference;
import java.util.Map;

import tv.danmaku.ijk.media.exo.IjkExoMediaPlayer;
import tv.danmaku.ijk.media.player.IMediaPlayer;

/**
 * 视频管理，单例
 * 目前使用的是IJK封装的谷歌EXOPlayer
 * Created by shuyu on 2016/11/11.
 */

public class GSYVideoManager implements IMediaPlayer.OnPreparedListener, IMediaPlayer.OnCompletionListener,
        IMediaPlayer.OnBufferingUpdateListener, IMediaPlayer.OnSeekCompleteListener, IMediaPlayer.OnErrorListener,
        IMediaPlayer.OnVideoSizeChangedListener, IMediaPlayer.OnInfoListener {

    public static String TAG = "GSYVideoManager";

    private static GSYVideoManager videoManager;

    public static final int HANDLER_PREPARE = 0;
    public static final int HANDLER_SETDISPLAY = 1;
    public static final int HANDLER_RELEASE = 2;

    private IjkExoMediaPlayer mediaPlayer;
    private HandlerThread mMediaHandlerThread;
    private MediaHandler mMediaHandler;
    private Handler mainThreadHandler;

    private Context context;
    private WeakReference<GSYMediaPlayerListener> listener;
    private WeakReference<GSYMediaPlayerListener> lastListener;

    private HttpProxyCacheServer proxy; //视频代理

    private int currentVideoWidth = 0; //当前播放的视频宽的高
    private int currentVideoHeight = 0; //当前播放的视屏的高
    private int lastState;//当前视频的最后状态

    /**
     * 初始化，必须的
     *
     * @param context
     */
    public static void initVideo(Context context) {
        if (videoManager == null) {
            videoManager = new GSYVideoManager(context);
        }
    }

    public static GSYVideoManager instance() {
        return videoManager;
    }

    /**
     * 获取缓存代理服务
     */
    public static HttpProxyCacheServer getProxy(Context context) {
        HttpProxyCacheServer proxy = GSYVideoManager.instance().proxy;
        return proxy == null ? (proxy = GSYVideoManager.instance().newProxy(context)) : proxy;
    }

    /**
     * 创建缓存代理服务
     */
    private HttpProxyCacheServer newProxy(Context context) {
        return new HttpProxyCacheServer(context.getApplicationContext());
    }


    public GSYMediaPlayerListener listener() {
        if (listener == null)
            return null;
        return listener.get();
    }

    public GSYMediaPlayerListener lastListener() {
        if (lastListener == null)
            return null;
        return lastListener.get();
    }

    public void setListener(GSYMediaPlayerListener listener) {
        if (listener == null)
            this.listener = null;
        else
            this.listener = new WeakReference<>(listener);
    }

    public void setLastListener(GSYMediaPlayerListener lastListener) {
        if (lastListener == null)
            this.lastListener = null;
        else
            this.lastListener = new WeakReference<>(lastListener);
    }

    public GSYVideoManager(Context context) {
        this.context = context;
        mediaPlayer = new IjkExoMediaPlayer(context);
        mMediaHandlerThread = new HandlerThread(TAG);
        mMediaHandlerThread.start();
        mMediaHandler = new MediaHandler((mMediaHandlerThread.getLooper()));
        mainThreadHandler = new Handler();
    }

    public class MediaHandler extends Handler {
        public MediaHandler(Looper looper) {
            super(looper);
        }

        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            switch (msg.what) {
                case HANDLER_PREPARE:
                    try {
                        currentVideoWidth = 0;
                        currentVideoHeight = 0;
                        mediaPlayer.release();
                        mediaPlayer = new IjkExoMediaPlayer(context);
                        mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
                        mediaPlayer.setDataSource(context, Uri.parse(((GSYModel) msg.obj).getUrl()), ((GSYModel) msg.obj).getMapHeadData());
                        mediaPlayer.setOnPreparedListener(GSYVideoManager.this);
                        mediaPlayer.setOnCompletionListener(GSYVideoManager.this);
                        mediaPlayer.setOnBufferingUpdateListener(GSYVideoManager.this);
                        mediaPlayer.setScreenOnWhilePlaying(true);
                        mediaPlayer.setOnSeekCompleteListener(GSYVideoManager.this);
                        mediaPlayer.setOnErrorListener(GSYVideoManager.this);
                        mediaPlayer.setOnInfoListener(GSYVideoManager.this);
                        mediaPlayer.setOnVideoSizeChangedListener(GSYVideoManager.this);
                        mediaPlayer.prepareAsync();
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                    break;
                case HANDLER_SETDISPLAY:
                    if (msg.obj == null) {
                        mediaPlayer.setSurface(null);
                    } else {
                        Surface holder = (Surface) msg.obj;
                        if (holder.isValid()) {
                            mediaPlayer.setSurface(holder);
                            if (mediaPlayer != null && mediaPlayer.getDuration() > 30
                                    && mediaPlayer.getCurrentPosition() < mediaPlayer.getDuration()) {
                                mediaPlayer.seekTo(mediaPlayer.getCurrentPosition() - 20);
                            }
                        }
                    }
                    break;
                case HANDLER_RELEASE:
                    mediaPlayer.release();
                    break;
            }
        }
    }


    public void prepare(final String url, final Map<String, String> mapHeadData, boolean loop) {
        if (TextUtils.isEmpty(url)) return;
        Message msg = new Message();
        msg.what = HANDLER_PREPARE;
        GSYModel fb = new GSYModel(url, mapHeadData, loop);
        msg.obj = fb;
        mMediaHandler.sendMessage(msg);
    }

    public void releaseMediaPlayer() {
        Message msg = new Message();
        msg.what = HANDLER_RELEASE;
        mMediaHandler.sendMessage(msg);
    }

    public void setDisplay(Surface holder) {
        Message msg = new Message();
        msg.what = HANDLER_SETDISPLAY;
        msg.obj = holder;
        mMediaHandler.sendMessage(msg);
    }

    @Override
    public void onPrepared(IMediaPlayer mp) {
        mainThreadHandler.post(new Runnable() {
            @Override
            public void run() {
                if (listener != null) {
                    listener().onPrepared();
                }
            }
        });
    }

    @Override
    public void onCompletion(IMediaPlayer mp) {
        mainThreadHandler.post(new Runnable() {
            @Override
            public void run() {
                if (listener != null) {
                    listener().onAutoCompletion();
                }
            }
        });
    }

    @Override
    public void onBufferingUpdate(IMediaPlayer mp, final int percent) {
        mainThreadHandler.post(new Runnable() {
            @Override
            public void run() {
                if (listener != null) {
                    listener().onBufferingUpdate(percent);
                }
            }
        });
    }

    @Override
    public void onSeekComplete(IMediaPlayer mp) {
        mainThreadHandler.post(new Runnable() {
            @Override
            public void run() {
                if (listener != null) {
                    listener().onSeekComplete();
                }
            }
        });
    }

    @Override
    public boolean onError(IMediaPlayer mp, final int what, final int extra) {
        mainThreadHandler.post(new Runnable() {
            @Override
            public void run() {
                if (listener != null) {
                    listener().onError(what, extra);
                }
            }
        });
        return true;
    }

    @Override
    public boolean onInfo(IMediaPlayer mp, final int what, final int extra) {
        mainThreadHandler.post(new Runnable() {
            @Override
            public void run() {
                if (listener != null) {
                    listener().onInfo(what, extra);
                }
            }
        });
        return false;
    }

    @Override
    public void onVideoSizeChanged(IMediaPlayer mp, int width, int height, int sar_num, int sar_den) {
        currentVideoWidth = mp.getVideoWidth();
        currentVideoHeight = mp.getVideoHeight();
        mainThreadHandler.post(new Runnable() {
            @Override
            public void run() {
                if (listener != null) {
                    listener().onVideoSizeChanged();
                }
            }
        });
    }

    public IjkExoMediaPlayer getMediaPlayer() {
        return mediaPlayer;
    }

    public int getCurrentVideoWidth() {
        return currentVideoWidth;
    }

    public int getCurrentVideoHeight() {
        return currentVideoHeight;
    }

    public int getLastState() {
        return lastState;
    }

    public void setLastState(int lastState) {
        this.lastState = lastState;
    }

    public void setCurrentVideoHeight(int currentVideoHeight) {
        this.currentVideoHeight = currentVideoHeight;
    }

    public void setCurrentVideoWidth(int currentVideoWidth) {
        this.currentVideoWidth = currentVideoWidth;
    }
}