package com.gh.common.util;

import android.content.Context;
import android.content.res.Resources;
import android.graphics.drawable.Animatable;
import android.graphics.drawable.ColorDrawable;
import android.net.Uri;
import android.view.ViewGroup;

import com.facebook.common.executors.CallerThreadExecutor;
import com.facebook.drawee.backends.pipeline.Fresco;
import com.facebook.drawee.controller.BaseControllerListener;
import com.facebook.drawee.controller.ControllerListener;
import com.facebook.drawee.drawable.ScalingUtils;
import com.facebook.drawee.generic.GenericDraweeHierarchyBuilder;
import com.facebook.drawee.view.SimpleDraweeView;
import com.facebook.imagepipeline.datasource.BaseBitmapDataSubscriber;
import com.facebook.imagepipeline.image.ImageInfo;
import com.facebook.imagepipeline.request.ImageRequest;
import com.facebook.imagepipeline.request.ImageRequestBuilder;
import com.gh.gamecenter.R;

public class ImageUtils {

    private static ImageUtils singleton;

	public static ImageUtils getInstance() {
		if (singleton == null) {
			synchronized (ImageUtils.class) {
				if (singleton == null) {
					singleton = new ImageUtils();
					return singleton;
				}
			}
		}
		return singleton;
	}

	// 自适应图片宽高
	public void display(final SimpleDraweeView simpleDraweeView, String url, final int width) {
		ControllerListener<ImageInfo> listener = new BaseControllerListener<ImageInfo>(){
			@Override
			public void onFinalImageSet(String id, ImageInfo imageInfo, Animatable animatable) {
				if (imageInfo == null){
					return;
				}
				ViewGroup.LayoutParams layoutParams = simpleDraweeView.getLayoutParams();
				float scale = (float) imageInfo.getHeight() / (float) imageInfo.getWidth();
				layoutParams.height = (int)(width * scale);
				simpleDraweeView.setLayoutParams(layoutParams);
			}
		};
		simpleDraweeView.setController(Fresco.newDraweeControllerBuilder()
				.setUri(url)
				.setControllerListener(listener)
				.build());
	}

	// 设置缩放类型，设置按压状态下的叠加图
	public void display(Resources resources, SimpleDraweeView simpleDraweeView,
	                    ScalingUtils.ScaleType scaleType, String url) {
		simpleDraweeView.setHierarchy(new GenericDraweeHierarchyBuilder(resources)
				.setFadeDuration(500)
				.setPressedStateOverlay(new ColorDrawable(resources.getColor(R.color.pressed_bg)))
				.setPlaceholderImage(R.drawable.ocupy2, ScalingUtils.ScaleType.CENTER)
				.setBackground(new ColorDrawable(resources.getColor(R.color.placeholder_bg)))
				.setActualImageScaleType(scaleType)
				.build());
		simpleDraweeView.setImageURI(url);
	}

	// 设置占位符
	public void display(Resources resources, SimpleDraweeView simpleDraweeView, String url, int placeholderImage) {
		simpleDraweeView.setHierarchy(new GenericDraweeHierarchyBuilder(resources)
				.setFadeDuration(500)
				.setPressedStateOverlay(new ColorDrawable(resources.getColor(R.color.pressed_bg)))
				.setBackground(new ColorDrawable(resources.getColor(R.color.placeholder_bg)))
				.setPlaceholderImage(placeholderImage)
				.build());
		simpleDraweeView.setImageURI(url);
	}

	// 图片下载监听和设置低高分辨率图片
	public void display(SimpleDraweeView simpleDraweeView, String url, String lowUrl,
	                    ControllerListener<? super ImageInfo> listener) {
		simpleDraweeView.setController(Fresco.newDraweeControllerBuilder()
				.setImageRequest(ImageRequest.fromUri(url))
				.setControllerListener(listener)
				.setLowResImageRequest(ImageRequest.fromUri(lowUrl)) // 低分辨率图片
				.build());
	}

	// 获取bitmap
	public void display(Context context, String url, BaseBitmapDataSubscriber dataSubscriber) {
		ImageRequest imageRequest = ImageRequestBuilder
				.newBuilderWithSource(Uri.parse(url))
				.setProgressiveRenderingEnabled(true)
				.build();

		Fresco.getImagePipeline()
				.fetchDecodedImage(imageRequest, context)
				.subscribe(dataSubscriber, CallerThreadExecutor.getInstance());
	}

}