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/*
 * Copyright (C) 2006 The Android Open Source Project
 * Copyright (C) 2013 YIXIA.COM
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.vov.vitamio.widget;

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Rect;
import android.media.AudioManager;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.view.*;
import android.widget.*;
import android.widget.SeekBar.OnSeekBarChangeListener;
import com.yixia.vitamio.library.R;
import com.yixia.zi.utils.Log;
import com.yixia.zi.utils.StringUtils;

/**
 * A view containing controls for a MediaPlayer. Typically contains the buttons
 * like "Play/Pause" and a progress slider. It takes care of synchronizing the
 * controls with the state of the MediaPlayer.
 * <p/>
 * The way to use this class is to a) instantiate it programatically or b)
 * create it in your xml layout.
 * <p/>
 * a) The MediaController will create a default set of controls and put them in
 * a window floating above your application. Specifically, the controls will
 * float above the view specified with setAnchorView(). By default, the window
 * will disappear if left idle for three seconds and reappear when the user
 * touches the anchor view. To customize the MediaController's style, layout and
 * controls you should extend MediaController and override the {#link
 * {@link #makeControllerView()} method.
 * <p/>
 * b) The MediaController is a FrameLayout, you can put it in your layout xml
 * and get it through {@link #findViewById(int)}.
 * <p/>
 * NOTES: In each way, if you want customize the MediaController, the SeekBar's
 * id must be mediacontroller_progress, the Play/Pause's must be
 * mediacontroller_pause, current time's must be mediacontroller_time_current,
 * total time's must be mediacontroller_time_total, file name's must be
 * mediacontroller_file_name. And your resources must have a pause_button
 * drawable and a play_button drawable.
 * <p/>
 * Functions like show() and hide() have no effect when MediaController is
 * created in an xml layout.
 */
public class MediaController extends FrameLayout {
  private static final int sDefaultTimeout = 3000;
  private static final int FADE_OUT = 1;
  private static final int SHOW_PROGRESS = 2;
  private MediaPlayerControl mPlayer;
  private Context mContext;
  private PopupWindow mWindow;
  private int mAnimStyle;
  private View mAnchor;
  private View mRoot;
  private ProgressBar mProgress;
  private TextView mEndTime, mCurrentTime;
  private TextView mFileName;
  private OutlineTextView mInfoView;
  private String mTitle;
  private long mDuration;
  private boolean mShowing;
  private boolean mDragging;
  private boolean mInstantSeeking = true;
  private boolean mFromXml = false;
  private ImageButton mPauseButton;
  private AudioManager mAM;
  private OnShownListener mShownListener;
  private OnHiddenListener mHiddenListener;
  @SuppressLint("HandlerLeak")
  private Handler mHandler = new Handler() {
    @Override
    public void handleMessage(Message msg) {
      long pos;
      switch (msg.what) {
        case FADE_OUT:
          hide();
          break;
        case SHOW_PROGRESS:
          pos = setProgress();
          if (!mDragging && mShowing) {
            msg = obtainMessage(SHOW_PROGRESS);
            sendMessageDelayed(msg, 1000 - (pos % 1000));
            updatePausePlay();
          }
          break;
      }
    }
  };
  private View.OnClickListener mPauseListener = new View.OnClickListener() {
    public void onClick(View v) {
      doPauseResume();
      show(sDefaultTimeout);
    }
  };
  private OnSeekBarChangeListener mSeekListener = new OnSeekBarChangeListener() {
    public void onStartTrackingTouch(SeekBar bar) {
      mDragging = true;
      show(3600000);
      mHandler.removeMessages(SHOW_PROGRESS);
      if (mInstantSeeking)
        mAM.setStreamMute(AudioManager.STREAM_MUSIC, true);
      if (mInfoView != null) {
        mInfoView.setText("");
        mInfoView.setVisibility(View.VISIBLE);
      }
    }

    public void onProgressChanged(SeekBar bar, int progress, boolean fromuser) {
      if (!fromuser)
        return;

      long newposition = (mDuration * progress) / 1000;
      String time = StringUtils.generateTime(newposition);
      if (mInstantSeeking)
        mPlayer.seekTo(newposition);
      if (mInfoView != null)
        mInfoView.setText(time);
      if (mCurrentTime != null)
        mCurrentTime.setText(time);
    }

    public void onStopTrackingTouch(SeekBar bar) {
      if (!mInstantSeeking)
        mPlayer.seekTo((mDuration * bar.getProgress()) / 1000);
      if (mInfoView != null) {
        mInfoView.setText("");
        mInfoView.setVisibility(View.GONE);
      }
      show(sDefaultTimeout);
      mHandler.removeMessages(SHOW_PROGRESS);
      mAM.setStreamMute(AudioManager.STREAM_MUSIC, false);
      mDragging = false;
      mHandler.sendEmptyMessageDelayed(SHOW_PROGRESS, 1000);
    }
  };

  public MediaController(Context context, AttributeSet attrs) {
    super(context, attrs);
    mRoot = this;
    mFromXml = true;
    initController(context);
  }

  public MediaController(Context context) {
    super(context);
    if (!mFromXml && initController(context))
      initFloatingWindow();
  }

  private boolean initController(Context context) {
    mContext = context;
    mAM = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);
    return true;
  }

  @Override
  public void onFinishInflate() {
    if (mRoot != null)
      initControllerView(mRoot);
  }

  private void initFloatingWindow() {
    mWindow = new PopupWindow(mContext);
    mWindow.setFocusable(false);
    mWindow.setBackgroundDrawable(null);
    mWindow.setOutsideTouchable(true);
    mAnimStyle = android.R.style.Animation;
  }

  /**
   * Set the view that acts as the anchor for the control view. This can for
   * example be a VideoView, or your Activity's main view.
   *
   * @param view The view to which to anchor the controller when it is visible.
   */
  public void setAnchorView(View view) {
    mAnchor = view;
    if (!mFromXml) {
      removeAllViews();
      mRoot = makeControllerView();
      mWindow.setContentView(mRoot);
      mWindow.setWidth(LayoutParams.MATCH_PARENT);
      mWindow.setHeight(LayoutParams.WRAP_CONTENT);
    }
    initControllerView(mRoot);
  }

  /**
   * Create the view that holds the widgets that control playback. Derived
   * classes can override this to create their own.
   *
   * @return The controller view.
   */
  protected View makeControllerView() {
    return ((LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(R.layout.mediacontroller, this);
  }

  private void initControllerView(View v) {
    mPauseButton = (ImageButton) v.findViewById(R.id.mediacontroller_play_pause);
    if (mPauseButton != null) {
      mPauseButton.requestFocus();
      mPauseButton.setOnClickListener(mPauseListener);
    }

    mProgress = (ProgressBar) v.findViewById(R.id.mediacontroller_seekbar);
    if (mProgress != null) {
      if (mProgress instanceof SeekBar) {
        SeekBar seeker = (SeekBar) mProgress;
        seeker.setOnSeekBarChangeListener(mSeekListener);
        seeker.setThumbOffset(1);
      }
      mProgress.setMax(1000);
    }

    mEndTime = (TextView) v.findViewById(R.id.mediacontroller_time_total);
    mCurrentTime = (TextView) v.findViewById(R.id.mediacontroller_time_current);
    mFileName = (TextView) v.findViewById(R.id.mediacontroller_file_name);
    if (mFileName != null)
      mFileName.setText(mTitle);
  }

  public void setMediaPlayer(MediaPlayerControl player) {
    mPlayer = player;
    updatePausePlay();
  }

  /**
   * Control the action when the seekbar dragged by user
   *
   * @param seekWhenDragging True the media will seek periodically
   */
  public void setInstantSeeking(boolean seekWhenDragging) {
    mInstantSeeking = seekWhenDragging;
  }

  public void show() {
    show(sDefaultTimeout);
  }

  /**
   * Set the content of the file_name TextView
   *
   * @param name
   */
  public void setFileName(String name) {
    mTitle = name;
    if (mFileName != null)
      mFileName.setText(mTitle);
  }

  /**
   * Set the View to hold some information when interact with the
   * MediaController
   *
   * @param v
   */
  public void setInfoView(OutlineTextView v) {
    mInfoView = v;
  }

  private void disableUnsupportedButtons() {
    try {
      if (mPauseButton != null && !mPlayer.canPause())
        mPauseButton.setEnabled(false);
    } catch (IncompatibleClassChangeError ex) {
    }
  }

  /**
   * <p>
   * Change the animation style resource for this controller.
   * </p>
   * <p/>
   * <p>
   * If the controller is showing, calling this method will take effect only the
   * next time the controller is shown.
   * </p>
   *
   * @param animationStyle animation style to use when the controller appears
   *                       and disappears. Set to -1 for the default animation, 0 for no animation, or
   *                       a resource identifier for an explicit animation.
   */
  public void setAnimationStyle(int animationStyle) {
    mAnimStyle = animationStyle;
  }

  /**
   * Show the controller on screen. It will go away automatically after
   * 'timeout' milliseconds of inactivity.
   *
   * @param timeout The timeout in milliseconds. Use 0 to show the controller
   *                until hide() is called.
   */
  public void show(int timeout) {
    if (!mShowing && mAnchor != null && mAnchor.getWindowToken() != null) {
      if (mPauseButton != null)
        mPauseButton.requestFocus();
      disableUnsupportedButtons();

      if (mFromXml) {
        setVisibility(View.VISIBLE);
      } else {
        int[] location = new int[2];

        mAnchor.getLocationOnScreen(location);
        Rect anchorRect = new Rect(location[0], location[1], location[0] + mAnchor.getWidth(), location[1] + mAnchor.getHeight());

        mWindow.setAnimationStyle(mAnimStyle);
        mWindow.showAtLocation(mAnchor, Gravity.NO_GRAVITY, anchorRect.left, anchorRect.bottom);
      }
      mShowing = true;
      if (mShownListener != null)
        mShownListener.onShown();
    }
    updatePausePlay();
    mHandler.sendEmptyMessage(SHOW_PROGRESS);

    if (timeout != 0) {
      mHandler.removeMessages(FADE_OUT);
      mHandler.sendMessageDelayed(mHandler.obtainMessage(FADE_OUT), timeout);
    }
  }

  public boolean isShowing() {
    return mShowing;
  }

  public void hide() {
    if (mAnchor == null)
      return;

    if (mShowing) {
      try {
        mHandler.removeMessages(SHOW_PROGRESS);
        if (mFromXml)
          setVisibility(View.GONE);
        else
          mWindow.dismiss();
      } catch (IllegalArgumentException ex) {
        Log.d("MediaController already removed");
      }
      mShowing = false;
      if (mHiddenListener != null)
        mHiddenListener.onHidden();
    }
  }

  public void setOnShownListener(OnShownListener l) {
    mShownListener = l;
  }

  public void setOnHiddenListener(OnHiddenListener l) {
    mHiddenListener = l;
  }

  private long setProgress() {
    if (mPlayer == null || mDragging)
      return 0;

    long position = mPlayer.getCurrentPosition();
    long duration = mPlayer.getDuration();
    if (mProgress != null) {
      if (duration > 0) {
        long pos = 1000L * position / duration;
        mProgress.setProgress((int) pos);
      }
      int percent = mPlayer.getBufferPercentage();
      mProgress.setSecondaryProgress(percent * 10);
    }

    mDuration = duration;

    if (mEndTime != null)
      mEndTime.setText(StringUtils.generateTime(mDuration));
    if (mCurrentTime != null)
      mCurrentTime.setText(StringUtils.generateTime(position));

    return position;
  }

  @Override
  public boolean onTouchEvent(MotionEvent event) {
    show(sDefaultTimeout);
    return true;
  }

  @Override
  public boolean onTrackballEvent(MotionEvent ev) {
    show(sDefaultTimeout);
    return false;
  }

  @Override
  public boolean dispatchKeyEvent(KeyEvent event) {
    int keyCode = event.getKeyCode();
    if (event.getRepeatCount() == 0 && (keyCode == KeyEvent.KEYCODE_HEADSETHOOK || keyCode == KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE || keyCode == KeyEvent.KEYCODE_SPACE)) {
      doPauseResume();
      show(sDefaultTimeout);
      if (mPauseButton != null)
        mPauseButton.requestFocus();
      return true;
    } else if (keyCode == KeyEvent.KEYCODE_MEDIA_STOP) {
      if (mPlayer.isPlaying()) {
        mPlayer.pause();
        updatePausePlay();
      }
      return true;
    } else if (keyCode == KeyEvent.KEYCODE_BACK || keyCode == KeyEvent.KEYCODE_MENU) {
      hide();
      return true;
    } else {
      show(sDefaultTimeout);
    }
    return super.dispatchKeyEvent(event);
  }

  private void updatePausePlay() {
    if (mRoot == null || mPauseButton == null)
      return;

    if (mPlayer.isPlaying())
      mPauseButton.setImageResource(R.drawable.mediacontroller_pause_button);
    else
      mPauseButton.setImageResource(R.drawable.mediacontroller_play_button);
  }

  private void doPauseResume() {
    if (mPlayer.isPlaying())
      mPlayer.pause();
    else
      mPlayer.start();
    updatePausePlay();
  }

  @Override
  public void setEnabled(boolean enabled) {
    if (mPauseButton != null)
      mPauseButton.setEnabled(enabled);
    if (mProgress != null)
      mProgress.setEnabled(enabled);
    disableUnsupportedButtons();
    super.setEnabled(enabled);
  }

  public interface OnShownListener {
    public void onShown();
  }

  public interface OnHiddenListener {
    public void onHidden();
  }

  public interface MediaPlayerControl {
    void start();

    void pause();

    long getDuration();

    long getCurrentPosition();

    void seekTo(long pos);

    boolean isPlaying();

    int getBufferPercentage();

    boolean canPause();

    boolean canSeekBackward();

    boolean canSeekForward();
  }

}