package cn.flightfeather.thirdapp.adapter;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.support.v4.view.PagerAdapter;
import android.view.View;
import android.view.ViewGroup;

import com.bm.library.PhotoView;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import cn.flightfeather.thirdapp.util.ScreenUtils;
import cn.flightfeather.thirdapp.util.photo.PhotoUtil;

/**
 * Created by hyhb01 on 2018/3/26.
 */

public class CommonPagerAdapter extends PagerAdapter {
    private List<File> fileList;
    private List<PhotoView> viewList;
    private List<String> titleList;
    private Context context;
    private View currentView;
    private boolean hasAdd = false;

    public CommonPagerAdapter(List<PhotoView> viewList, List<String> titleList, Context context) {
        this.viewList = viewList;
        this.titleList = titleList;
        this.fileList = new ArrayList<>();
    }

    public CommonPagerAdapter(List<File> fileList, Context context) {
        this.fileList = fileList;
        this.context = context;
        this.viewList = new ArrayList<PhotoView>();
        this.titleList = new ArrayList<>();
        for (int i = 0; i < fileList.size(); i++) {
            viewList.add(new PhotoView(context));
        }
    }

    @Override
    public int getCount() {
        return fileList.size();
    }

    @Override
    public boolean isViewFromObject(View view, Object object) {
        return view == object;
    }

    @Override
    public Object instantiateItem(ViewGroup container, int position) {

        Bitmap bm = PhotoUtil.decodeSampledBitmapFromResource(fileList.get(position).getAbsolutePath(), ScreenUtils.getScreenWidth(context), ScreenUtils.getScreenHeight(context));
        viewList.get(position).setImageBitmap(bm);

        container.addView(viewList.get(position));

        return viewList.get(position);
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        BitmapDrawable bitmapDrawable = (BitmapDrawable) viewList.get(position).getDrawable();
        viewList.get(position).setImageDrawable(null);
        if (bitmapDrawable != null) {
            Bitmap bitmap = bitmapDrawable.getBitmap();
            if (bitmap != null) {
                bitmap.recycle();
                System.gc();
            }
        }

        container.removeView(viewList.get(position));
    }

    @Override
    public CharSequence getPageTitle(int position) {
        return titleList.get(position);
    }


}