package com.hdl.widget.CoverFlowViewPager;

import android.app.Activity;
import android.content.Context;
import android.os.Handler;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.RelativeLayout;


import com.hdl.widgetxm.R;

import java.util.List;

/**
 * Created by JLChen on 2019/8/22
 */
public class HDLCoverFlowViewPager extends RelativeLayout implements ViewPager.OnPageChangeListener {
    private View mLayout;//布局
    private Activity mContext;//上下文
    private ViewPager mViewPager;//viewpager
    private HDLCoverFlowViewPagerAdapter mPagerAdapter;//adapter
    private List<View> mViewsList;//url数组
    private int currentIndex = 0;//当前实际page
//    private int startCurrentIndex = 0;//当前page
    private long secondTime = 0, firstTime = 0;

    //private Timer mTimer=null;//定时器
    //private MyTimerTask mTimerTask=null;

    private Handler mHandler = null;
    private AutoRollRunnable mAutoRollRunnable = null;
    private int mRollTime = 5000;
    //    private int resId_piont_press= R.mipmap.ic_banner_point_press;
//    private int resId_piont=R.mipmap.ic_banner_point;
    private boolean isPoint = false;//开启指示器


    private int mScrolledCurrentIndex = 0;


    public static interface OnClickGalleryListener {
        void onGalleryClick(int position);

        void onGalleryPositionChange(int position);
    }

    private OnClickGalleryListener mOnClickGalleryListener;

    public HDLCoverFlowViewPager addGalleryListener(OnClickGalleryListener listener) {
        mOnClickGalleryListener = listener;
        return this;
    }

    //ui更新
//    Handler mHandler=mHandler= new Handler(){
//        public void handleMessage(Message msg) {
//            int index =  mViewPager.getCurrentItem()+1;//下一个页
//            mViewPager.setCurrentItem(index);//设置此次要显示的pager
//            currentIndex=index%mList.size();
//            setImageBackground(currentIndex);
//        }
//    };

    public HDLCoverFlowViewPager(Context context) {
        super(context);
        this.mContext = (Activity) context;
    }

    public HDLCoverFlowViewPager(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        this.mContext = (Activity) context;
    }

    public HDLCoverFlowViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
        this.mContext = (Activity) context;

    }

    /**
     * 初始化viewpager
     *
     * @param list      view集合
     * @param isGallery 是否使用3D画廊效果
     */
    public HDLCoverFlowViewPager initBanner(List<View> list, boolean isGallery) {
        mViewsList = list;
        //引入布局
        mLayout = LayoutInflater.from(mContext).inflate(R.layout.hdl_gallery_banner_view_layout, null);
        mViewPager = (ViewPager) mLayout.findViewById(R.id.hdl_gallery_viewPager);//关闭
//        mLineIndicator  = (LinearLayout) mLayout.findViewById(R.id.lineIndicator);
//        //初始化位置
//        currentIndex = startCurrentIndex%mList.size();
        currentIndex = 0;
        mPagerAdapter = new HDLCoverFlowViewPagerAdapter(mViewsList);
        mPagerAdapter.setOnClickViewsListener(new HDLCoverFlowViewPagerAdapter.OnClickViewsListener() {
            @Override
            public void onViewsClick(int position) {
                if (mOnClickGalleryListener != null) {
                    mOnClickGalleryListener.onGalleryClick(position);
                }
            }
        });

        mViewPager.setAdapter(mPagerAdapter);
        if (isGallery) {
            mViewPager.setPageTransformer(true, new HDLZoomPageTransformer());
//            mViewPager.setPageTransformer(true, new CoverTransformer(0.8f,0f, 0f,25f));
        }

        mViewPager.setCurrentItem(currentIndex);
        mViewPager.setOffscreenPageLimit(2);//设置预加载的数量，这里设置了2,会预加载中心item左边两个Item和右边两个Item
        mViewPager.addOnPageChangeListener(this);
        return this;
    }


    /**
     * 初始化viewpager
     *
     * @param list      view集合
     * @param isGallery 是否使用3D画廊效果
     * @param rotationY 旋转角度
     */
    public HDLCoverFlowViewPager initBanner(List<View> list, boolean isGallery, float rotationY) {
        mViewsList = list;
        rotationY = dip2px(rotationY);
        //引入布局
        mLayout = LayoutInflater.from(mContext).inflate(R.layout.hdl_gallery_banner_view_layout, null);
        mViewPager = (ViewPager) mLayout.findViewById(R.id.hdl_gallery_viewPager);//关闭
        mPagerAdapter = new HDLCoverFlowViewPagerAdapter(mViewsList);
        mPagerAdapter.setOnClickViewsListener(new HDLCoverFlowViewPagerAdapter.OnClickViewsListener() {
            @Override
            public void onViewsClick(int position) {
                if (mOnClickGalleryListener != null) {
                    mOnClickGalleryListener.onGalleryClick(position);
                }
            }
        });

        mViewPager.setAdapter(mPagerAdapter);
        if (isGallery) {
//            mViewPager.setPageTransformer(true, new HDLZoomPageTransformer(alpha));
            mViewPager.setPageTransformer(true, new CoverTransformer(0.3f,0f, 0f, rotationY));

        }
        mViewPager.setCurrentItem(currentIndex);
        mViewPager.setOffscreenPageLimit(2);//设置预加载的数量，这里设置了2,会预加载中心item左边两个Item和右边两个Item
        mViewPager.addOnPageChangeListener(this);
        return this;
    }

//    /**
//     * 添加圆角
//     * @param corners
//     * @return
//     */
//    public HDLGalleryViewPager addRoundCorners(int corners){
//        mPagerAdapter.setmRoundCorners(corners);
//        return this;
//    }

    /**
     * @param columnMargin 两个Page之间的距离
     * @param rowMargin    page的外边距
     *                     注意当添加了3D画廊效果时,columnMargin尽量设小。应该本是已经进行了x、y的缩放
     */
    public HDLCoverFlowViewPager addPageMargin(int columnMargin, int rowMargin) {

        mViewPager.setPageMargin(dip2px(columnMargin));
        RelativeLayout.LayoutParams layout = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
                RelativeLayout.LayoutParams.WRAP_CONTENT);
        layout.setMargins(dip2px(rowMargin), 0, dip2px(rowMargin), 0);
        mViewPager.setLayoutParams(layout);
        return this;
    }

//

    /**
     * 配置完成,将布局添加到父容器
     */
    public HDLCoverFlowViewPager finishConfig() {
        this.addView(mLayout);
        return this;
    }

    /**
     * 设置是否开始自动轮播，并设置时间间隔
     */
    public HDLCoverFlowViewPager addStartTimer(int time) {
        mRollTime = time;
        if (mHandler == null) {
            mHandler = new Handler();
        }
        if (mAutoRollRunnable == null) {
            mAutoRollRunnable = new AutoRollRunnable();
        }

        mAutoRollRunnable.start();
        return this;
    }

    // 停止轮播
    public void stopTimer() {
        if (mAutoRollRunnable != null) {
            mAutoRollRunnable.stop();
        }
    }

    private class AutoRollRunnable implements Runnable {
        //是否在轮播的标志
        boolean isRunning = false;

        @Override
        public void run() {
            if (isRunning) {
                int index = mViewPager.getCurrentItem() + 1;//下一个页
                mViewPager.setCurrentItem(index);//设置此次要显示的pager
                currentIndex = index % mViewsList.size();
//                setImageBackground(currentIndex);
                mHandler.postDelayed(this, 1000 * mRollTime);
            }
        }

        public void start() {
            if (!isRunning) {
                isRunning = true;
                mHandler.removeCallbacks(this);
                mHandler.postDelayed(this, 1000 * mRollTime);
            }
        }

        public void stop() {
            if (isRunning) {
                mHandler.removeCallbacks(this);
                isRunning = false;
            }
        }
    }


    /**
     * 根据手机的分辨率从 dp 的单位 转成为 px(像素)
     */
    public int dip2px(float dpValue) {
        final float scale = mContext.getResources().getDisplayMetrics().density;
        return (int) (dpValue * scale + 0.5f);
    }

    //---------------viewpager滑动事件-----------------
    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

        if(mScrolledCurrentIndex == position) return;

        mScrolledCurrentIndex = position;

        if (mOnClickGalleryListener != null) {
            mOnClickGalleryListener.onGalleryPositionChange(mScrolledCurrentIndex);
        }
    }

    @Override
    public void onPageScrollStateChanged(int state) {

    }

    /**
     * 滑动时同步改变底部小圆点
     *
     * @param position
     */
    @Override
    public void onPageSelected(int position) {
        currentIndex = position;
    }


    public void updateViewsList(List<View> list){
        mViewsList = list;
        if(mPagerAdapter != null) {
            mPagerAdapter.updateViewsList(mViewsList);
            refreshViewPager();
        }
    }

    private void refreshViewPager(){
        currentIndex = 0;
        mPagerAdapter.notifyDataSetChanged();
        if(mViewsList.size() > 1) {
            mViewPager.setCurrentItem(currentIndex + 1);
            new Handler().postDelayed(new Runnable() {
                @Override
                public void run() {
                    mViewPager.setCurrentItem(currentIndex);
                }
            }, 1);
        }
    }

    public void setCurrentItem(int item){
        currentIndex = item;
        mViewPager.setCurrentItem(item);
    }
}