/*******************************************************************************
 * Copyright (c) 2013 Chris Banes.
 *
 * 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 uk.co.blatech.blaupload.ui;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Matrix;
import android.graphics.RectF;
import android.graphics.drawable.Drawable;
import android.support.v4.view.PagerAdapter;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView.ScaleType;

import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.listener.SimpleImageLoadingListener;
import com.squareup.picasso.Picasso;
import com.squareup.picasso.Target;

import java.io.IOException;
import java.util.ArrayList;

import uk.co.blatech.blaupload.R;

public class ImagePagerAdapter extends PagerAdapter {

    private final ArrayList<String> mUrls;

    private final Context mContext;
    private float[] mWidths;

    private float[] mHeights;
    private int position;
    private ViewGroup container;

    private TouchImageView imageView;
    private TouchImageView zoomImageView;
    private ImageLoader imageLoader;
    private ZoomViewPager mPager;
    private ArrayList<String> filenames;

    public ImagePagerAdapter(Context context, ArrayList<String> urls) {
        mUrls = urls;
        mContext = context;
        mWidths = new float[mUrls.size()];

        mHeights = new float[mUrls.size()];
        filenames = new ArrayList<String>();
    }


    private Target target = new Target() {
        @Override
        public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
            zoomImageView.setImageBitmap(bitmap);
            zoomImageView.setVisibility(View.VISIBLE);
            imageView.setVisibility(View.GONE);
        }

        @Override
        public void onBitmapFailed(Drawable errorDrawable) {

        }

        @Override
        public void onPrepareLoad(Drawable placeHolderDrawable) {

        }


    };

    @Override
    public int getCount() {
        return null != mUrls ? mUrls.size() : 0;
    }

    @Override
    public View instantiateItem(ViewGroup con, int pos) {
        container = con;
        position = pos;


        LayoutInflater inflater = (LayoutInflater) container.getContext()
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View view = inflater.inflate(R.layout.image_pager_item, container, false);


        imageView = (TouchImageView) view.findViewById(R.id.imageView);
        zoomImageView = (TouchImageView) view.findViewById(R.id.zoomImageView);
        final String url = mUrls.get(position);
        String[] parts = url.split("/");
        final String filename = parts[parts.length-1];


        imageLoader = ImageLoader.getInstance();
        imageLoader.displayImage(url, imageView);

        imageView.setScaleType(ScaleType.FIT_CENTER);
        zoomImageView.setScaleType(ScaleType.FIT_CENTER);
        container.refreshDrawableState();

        imageView.setTag("img"+pos);
        zoomImageView.setTag("zoom"+pos);
        mWidths[position] = 0;
        mHeights[position] = 0;
        filenames.add(pos, filename);
        mPager = (ZoomViewPager) container.findViewById(R.id.imagePager);

        imageView.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {
                final TouchImageView thisImage = (TouchImageView) container.findViewWithTag("img" + mPager.getCurrentItem());
                final TouchImageView zoomImage = (TouchImageView) container.findViewWithTag("zoom" + mPager.getCurrentItem());

                if (thisImage.getCurrentZoom() > 1.0) {

                    imageLoader.displayImage("http://www.blaupload.co.uk/"+ filenames.get(mPager.getCurrentItem()), zoomImage, new SimpleImageLoadingListener() {
                        //
                        @Override
                        public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {

                            zoomImage.setZoom(thisImage.getCurrentZoom());

                            zoomImage.setVisibility(View.VISIBLE);
                            thisImage.setVisibility(View.GONE);
                        }
                    });

                }
                Log.d(ImagePagerAdapter.class.toString(), "Initial width: "+ mWidths[position] +", height: "+ mHeights[position]);
                Log.d(ImagePagerAdapter.class.toString(), "Current width: " + thisImage.getMeasuredWidth() + ", height: " + thisImage.getMeasuredHeight());
                Log.d(ImagePagerAdapter.class.toString(), "Other width: " + thisImage.getWidth() + ", height: " + thisImage.getHeight());
                Log.d(ImagePagerAdapter.class.toString(), "Zoom: " + thisImage.getCurrentZoom());
                return true;
            }
        });

        container.addView(view, 0);

        return view;
    }

    @Override
    public void destroyItem(ViewGroup container, int position, Object object) {
        container.removeView((View) object);
    }

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

}