package com.imagepick.adapter;

import android.content.Context;
import android.graphics.Point;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.StateListDrawable;
import android.graphics.drawable.shapes.RoundRectShape;
import android.net.Uri;
import android.os.Build;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.BaseAdapter;
import android.widget.TextView;

import com.facebook.drawee.backends.pipeline.Fresco;
import com.facebook.drawee.interfaces.DraweeController;
import com.facebook.drawee.view.SimpleDraweeView;
import com.facebook.imagepipeline.common.ResizeOptions;
import com.facebook.imagepipeline.request.ImageRequest;
import com.facebook.imagepipeline.request.ImageRequestBuilder;
import com.imagepick.R;
import com.imagepick.bean.Image;
import com.imagepick.bean.OptionBean;
import com.imagepick.utils.Utils;

import java.util.ArrayList;
import java.util.List;


/**
 * 图片Adapter
 */
public class ImageGridAdapter extends BaseAdapter {

    private static final int TYPE_CAMERA = 0;
    private static final int TYPE_NORMAL = 1;
    private final OptionBean mOption;

    private Context mContext;

    private LayoutInflater mInflater;
    private boolean showCamera = true;
    private boolean showSelectIndicator = true;

    private List<Image> mImages = new ArrayList<>();
    private List<Image> mSelectedImages = new ArrayList<>();
//
//    //优化单选用
//    private Map<String, ViewHolder> mViewMap = new HashMap<>();

    final int mGridWidth;
    private StateListDrawable mStates;
    private ShapeDrawable mIndicatorDrawable;

    public ImageGridAdapter(Context context, boolean showCamera, int column, OptionBean optionBean) {
        mContext = context;
        mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        this.showCamera = showCamera;
        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        int width = 0;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
            Point size = new Point();
            wm.getDefaultDisplay().getSize(size);
            width = size.x;
        } else {
            width = wm.getDefaultDisplay().getWidth();
        }
        //计算每一列的宽度
        mGridWidth = width / column;

        this.mOption = optionBean;
    }

    /**
     * 显示选择指示器
     *
     * @param showSelectIndicator
     */
    public void showSelectIndicator(boolean showSelectIndicator) {
        this.showSelectIndicator = showSelectIndicator;
    }

    public void setShowCamera(boolean showCamera) {
        if (this.showCamera == showCamera) return;
        this.showCamera = showCamera;
        notifyDataSetChanged();
    }

    public boolean isShowCamera() {
        return showCamera;
    }

    /**
     * 选择某个图片，改变选择状态(待继续优化刷新机制，如只刷新当前选中的item)
     *
     * @param image
     */
    public void select(Image image) {
        if (mSelectedImages.contains(image)) {
            mSelectedImages.remove(image);
        } else {
            mSelectedImages.add(image);
        }
        notifyDataSetChanged();
    }


    /**
     * 通过图片路径设置默认选择
     *
     * @param resultList
     */
    public void setDefaultSelected(ArrayList<String> resultList) {
        for (String path : resultList) {
            Image image = getImageByPath(path);
            if (image != null) {
                mSelectedImages.add(image);
            }
        }
        if (mSelectedImages.size() > 0) {
            notifyDataSetChanged();
        }
    }

    private Image getImageByPath(String path) {
        if (mImages != null && mImages.size() > 0) {
            for (Image image : mImages) {
                if (image.path.equalsIgnoreCase(path)) {
                    return image;
                }
            }
        }
        return null;
    }

    /**
     * 设置数据集
     *
     * @param images
     */
    public void setData(List<Image> images) {
        mSelectedImages.clear();

        if (images != null && images.size() > 0) {
            mImages = images;
        } else {
            mImages.clear();
        }
        notifyDataSetChanged();
    }

    @Override
    public int getViewTypeCount() {
        return 2;
    }

    @Override
    public int getItemViewType(int position) {
        if (showCamera) {
            //如果现实照相机，则第一个是相机图标
            return position == 0 ? TYPE_CAMERA : TYPE_NORMAL;
        }
        return TYPE_NORMAL;
    }

    @Override
    public int getCount() {
        return showCamera ? mImages.size() + 1 : mImages.size();
    }

    @Override
    public Image getItem(int i) {
        if (showCamera) {
            if (i == 0) {
                return null;
            }
            return mImages.get(i - 1);
        } else {
            return mImages.get(i);
        }
    }

    @Override
    public long getItemId(int i) {
        return i;
    }

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {

        if (isShowCamera()) {
            if (i == 0) {
                view = mInflater.inflate(R.layout.list_item_camera, viewGroup, false);
                ViewGroup.LayoutParams layoutParams = view.getLayoutParams();
                layoutParams.width = mGridWidth;
                layoutParams.height = mGridWidth;
                view.setLayoutParams(layoutParams);
                return view;
            }
        }

        ViewHolder holder;
        if (view == null) {
            view = mInflater.inflate(R.layout.list_item_image, viewGroup, false);
            holder = new ViewHolder(view);
        } else {
            holder = (ViewHolder) view.getTag();
        }

        if (holder != null) {
            holder.bindData(getItem(i));
        }

        return view;
    }


    class ViewHolder {
        SimpleDraweeView image;
        TextView indicator;
        View mask;

        ViewHolder(View view) {
            image = (SimpleDraweeView) view.findViewById(R.id.image);
            //设置image的宽高
            ViewGroup.LayoutParams layoutParams = image.getLayoutParams();
            layoutParams.width = mGridWidth;
            layoutParams.height = mGridWidth;
            image.setLayoutParams(layoutParams);

            indicator = (TextView) view.findViewById(R.id.checkmark);
            indicator.setBackgroundDrawable(getDefaultBackground());
            //设置蒙版的宽高
            mask = view.findViewById(R.id.mask);
            mask.setLayoutParams(layoutParams);
            view.setTag(this);
        }

        void bindData(final Image data) {
            if (data == null) return;

//            mViewMap.put(data.path, this);
            updateDate(data);

        }

        void updateDate(Image data) {
            // 处理单选和多选状态
            if (showSelectIndicator) {
                indicator.setVisibility(View.VISIBLE);
                if (mSelectedImages.contains(data)) {
                    // 设置选中状态
                    indicator.setText("" + (mSelectedImages.indexOf(data) + 1));
                    indicator.setVisibility(View.VISIBLE);
                    mask.setVisibility(View.VISIBLE);
                } else {
                    // 未选择
                    indicator.setVisibility(View.INVISIBLE);
                    mask.setVisibility(View.INVISIBLE);
                }
            } else {
                indicator.setVisibility(View.INVISIBLE);
                mask.setVisibility(View.INVISIBLE);
            }
            //使用ReactNative默认引入的图片加载框架Fresco
            ImageRequest request = ImageRequestBuilder
                    .newBuilderWithSource(Uri.parse("file://" + data.path))
                    .setLocalThumbnailPreviewsEnabled(true)
                    .setLowestPermittedRequestLevel(ImageRequest.RequestLevel.FULL_FETCH)
                    .setResizeOptions(new ResizeOptions(mGridWidth, mGridWidth))
                    .build();
            DraweeController controller = Fresco.newDraweeControllerBuilder()
                    .setImageRequest(request)
                    .build();
            image.setController(controller);
        }
    }

    private ShapeDrawable getDefaultBackground() {
        if (mIndicatorDrawable != null) return mIndicatorDrawable;
        int r = Utils.dipToPixels(mContext, 100);
        float[] outerR = new float[]{r, r, r, r, r, r, r, r};

        RoundRectShape rr = new RoundRectShape(outerR, null, null);
        mIndicatorDrawable = new ShapeDrawable(rr);
        mIndicatorDrawable.getPaint().setColor(mOption.listNavigationBarIndicatorColor);

        return mIndicatorDrawable;
    }
}