package com.gh.gamecenter;

import android.app.Activity;
import android.app.Dialog;
import android.content.Context;
import android.content.Intent;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.support.annotation.Nullable;
import android.support.v4.content.ContextCompat;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.text.TextUtils;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.facebook.common.executors.CallerThreadExecutor;
import com.facebook.common.references.CloseableReference;
import com.facebook.datasource.DataSource;
import com.facebook.drawee.backends.pipeline.Fresco;
import com.facebook.drawee.interfaces.DraweeController;
import com.facebook.imagepipeline.core.ImagePipeline;
import com.facebook.imagepipeline.datasource.BaseBitmapDataSubscriber;
import com.facebook.imagepipeline.image.CloseableImage;
import com.facebook.imagepipeline.request.ImageRequest;
import com.facebook.imagepipeline.request.ImageRequestBuilder;
import com.gh.base.BaseActivity;
import com.gh.common.util.DisplayUtils;
import com.gh.common.util.EntranceUtils;
import com.gh.common.util.ImageUtils;
import com.gh.common.util.MessageShareUtils;
import com.gh.common.util.NetworkUtils;
import com.gh.common.view.EmptyDrawable;
import com.gh.common.view.Gh_RelativeLayout;
import com.gh.common.view.Gh_RelativeLayout.OnSingleTapListener;
import com.gh.common.view.Gh_ViewPager;
import com.gh.common.view.ZoomSimpleDraweeView;
import com.gh.gamecenter.entity.ImageInfoEntity;
import com.gh.gamecenter.retrofit.Response;
import com.gh.gamecenter.retrofit.RetrofitManager;
import com.lightgame.utils.Utils;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Locale;
import java.util.Map;

import butterknife.BindView;
import io.reactivex.android.schedulers.AndroidSchedulers;
import io.reactivex.schedulers.Schedulers;

/**
 * 查看游戏截图页面
 *
 * @author 黄壮华
 */
public class ViewImageActivity extends BaseActivity implements OnPageChangeListener {

    public static final int REQUEST_FOR_VIEWED_IMAGE = 921;
    public static final String VIEWED_IMAGE = "viewed_image";

    @BindView(R.id.image_detail_page)
    Gh_ViewPager mViewPager;
    @BindView(R.id.image_detail_slide)
    View mSlideLine;
    @BindView(R.id.image_detail_progress)
    TextView mProgressHint;

    private RelativeLayout.LayoutParams rparams;

    private ViewImageAdapter adapter;

    private ImagePipeline mImagePipeline;

    private static final String KEY_URLS = "urls";
    private static final String KEY_CURRENT = "current";
    private static final String KEY_SCALETYPE = "ScaleType";

    private ArrayList<String> urls;
    private HashSet<Integer> mViewedSet; // 让调用者知道该图片是否被看过了
    private Map<String, ImageInfoEntity> mImageInfoMap;

    private int width;
    private int mLimitWidth;

    private boolean isOrientation;

    public static Intent getViewImageIntent(Context context, ArrayList<String> list, int position, String entrance) {
        Intent checkIntent = new Intent(context, ViewImageActivity.class);
        checkIntent.putExtra(KEY_URLS, list);
        checkIntent.putExtra(KEY_CURRENT, position);
        checkIntent.putExtra(EntranceUtils.KEY_ENTRANCE, entrance);
        return checkIntent;
    }


    @Override
    protected int getLayoutId() {
        return R.layout.activity_viewimage;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mViewedSet = new HashSet();
        mImageInfoMap = new HashMap();

        // init data
        int current = 0;
        Bundle extras = getIntent().getExtras();
        if (extras != null) {
            urls = extras.getStringArrayList(KEY_URLS);
            current = extras.getInt(KEY_CURRENT, 0);
        }

        if (savedInstanceState != null) {
            current = savedInstanceState.getInt(EntranceUtils.KEY_CURRENTITEM, 0);
            isOrientation = savedInstanceState.getBoolean("isOrientation");
        }

        mImagePipeline = Fresco.getImagePipeline();

        // init slide
        DisplayMetrics outMetrics = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(outMetrics);
        int widthPixels = outMetrics.widthPixels;
        if (NetworkUtils.isWifiOr4GConnected(this)) {
            mLimitWidth = widthPixels * 2;
        } else {
            mLimitWidth = widthPixels;
        }
        width = widthPixels / urls.size();
        rparams = new RelativeLayout.LayoutParams(width, DisplayUtils.dip2px(getApplicationContext(), 1));
        rparams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
        rparams.bottomMargin = DisplayUtils.dip2px(getApplicationContext(), 10);
        rparams.leftMargin = width * current;
        mSlideLine.setLayoutParams(rparams);

        // init viewPage
        adapter = new ViewImageAdapter();
        mViewPager.setAdapter(adapter);
        mViewPager.setCurrentItem(current);
        mViewPager.addOnPageChangeListener(this);

        if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
            isOrientation = true; // 横屏
        } else if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
            isOrientation = false;// 竖屏
        }

        mProgressHint.setOnClickListener(v -> {
            int position = mViewPager.getCurrentItem();
            Object object = mViewPager.findViewWithTag(position);
            if (object != null) {
                mProgressHint.setWidth(mProgressHint.getWidth());
                RelativeLayout view = (RelativeLayout) object;
                final ZoomSimpleDraweeView draweeView = view.findViewById(R.id.viewimage_iv_show);
                draweeView.getHierarchy().setProgressBarImage(new EmptyDrawable(progress -> {
                    if (position == mViewPager.getCurrentItem()) { // 防止下载过程中切换图片
                        int percent = progress / 100;
                        if (percent < 100) {
                            mProgressHint.setText((percent + "%"));
                        } else {
                            mProgressHint.setText("已完成");
                            mBaseHandler.postDelayed(() -> {
                                if (position == mViewPager.getCurrentItem()) {  // 防止等待过程中切换图片
                                    mProgressHint.setVisibility(View.GONE);
                                }
                            }, 500);
                        }
                    }
                }));
                draweeView.setController(Fresco.newDraweeControllerBuilder()
                        // 高清图片
                        .setImageRequest(ImageRequest.fromUri(urls.get(position)))
                        // 低分辨率图片
                        .setLowResImageRequest(ImageRequest.fromUri(ImageUtils.addLimitWidth(urls.get(position), mLimitWidth)))
                        .build());
            }
        });
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putInt(EntranceUtils.KEY_CURRENTITEM, mViewPager.getCurrentItem());
        outState.putBoolean("isOrientation", isOrientation);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mViewPager.onDestroy(); // 注销EventBus
    }

    @Override
    public void onPageScrolled(int position, float positionOffset,
                               int positionOffsetPixels) {
        if (positionOffset != 0) {
            rparams.leftMargin = (int) (width * (positionOffset + position));
            mSlideLine.setLayoutParams(rparams);
            mProgressHint.setVisibility(View.GONE);
        } else {
            String url = urls.get(position);
            ImageInfoEntity imageInfoEntity = mImageInfoMap.get(url);
            if (imageInfoEntity != null && imageInfoEntity.getFileSize() != null &&
                    !mImagePipeline.isInBitmapMemoryCache(ImageRequest.fromUri(url)) &&
                    !mImagePipeline.isInDiskCacheSync(ImageRequest.fromUri(url))) {
                String size = String.format(Locale.CHINA, "%.1fM",
                        Integer.valueOf(imageInfoEntity.getFileSize().getValue()) / 1024F / 1024F);
                mProgressHint.setVisibility(View.VISIBLE);
                mProgressHint.setText(("查看原图(" + size + ")"));
                ViewGroup.LayoutParams layoutParams = mProgressHint.getLayoutParams();
                layoutParams.width = ViewGroup.LayoutParams.WRAP_CONTENT;
                mProgressHint.setLayoutParams(layoutParams);
            }
        }

        mViewedSet.add(position);
        setResult(Activity.RESULT_OK, new Intent().putExtra(VIEWED_IMAGE, mViewedSet));
    }

    @Override
    public void onPageSelected(int position) {
        Gh_RelativeLayout ghRelativeLayout;
        for (int i = 0; i < mViewPager.getChildCount(); i++) {
            if (mViewPager.getChildAt(i).getTag() != null) {
                ghRelativeLayout = (Gh_RelativeLayout) mViewPager.getChildAt(i);
                if (ghRelativeLayout == null) {
                    return;
                }

                ZoomSimpleDraweeView zoomDraweeView = ghRelativeLayout.findViewById(R.id.viewimage_iv_show);
                zoomDraweeView.reset(); // 重置矩阵，还原图片
            }
        }
    }

    @Override
    public void onPageScrollStateChanged(int newState) {

    }

    private void loadImageInfo(int position, int width) {
        String url = urls.get(position);
        RetrofitManager.getInstance(this)
                .getApi().getImageInfo(url + "?x-oss-process=image/info")
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Response<ImageInfoEntity>() {
                    @Override
                    public void onResponse(@Nullable ImageInfoEntity response) {
                        if (response != null && response.getImageWidth() != null &&
                                Integer.valueOf(response.getImageWidth().getValue()) > width) {
                            mImageInfoMap.put(url, response);
                            if (position == mViewPager.getCurrentItem()) {
                                onPageScrolled(position, 0, 0); // 刷新下载原图提示按钮
                            }
                        }
                    }
                });
    }

    private void loadImage(String url, final ZoomSimpleDraweeView imageView) {
        if (url.contains(".gif")) {
            DraweeController controller = Fresco.newDraweeControllerBuilder()
                    .setUri(url)
                    .setAutoPlayAnimations(true)
                    .build();
            imageView.setController(controller);
        } else {
            imageView.setImageURI(url); // 加载原图
        }

    }

    private class ViewImageAdapter extends PagerAdapter implements OnSingleTapListener {

        @Override
        public int getCount() {
            if (urls == null) {
                return 0;
            }
            return urls.size();
        }

        @Override
        public Object instantiateItem(ViewGroup container, int position) {
            String url = urls.get(position);

            Gh_RelativeLayout view = (Gh_RelativeLayout) View.inflate(container.getContext(), R.layout.viewimage_normal_item, null);
            ZoomSimpleDraweeView imageView = view.findViewById(R.id.viewimage_iv_show);

            if (mImagePipeline.isInBitmapMemoryCache(ImageRequest.fromUri(url)) ||
                    mImagePipeline.isInDiskCacheSync(ImageRequest.fromUri(url)) ||
                    NetworkUtils.isWifiOr4GConnected(ViewImageActivity.this) ||
                    url.contains(".gif")) {
                loadImage(url, imageView);
            } else {
                ImageUtils.addLimitWidthAndLoad(imageView, url, mLimitWidth, imageInfo -> {
                    if (imageInfo != null && mImageInfoMap.get(url) == null) {
                        loadImageInfo(position, imageInfo.getWidth()); // 加载图片参数,目的是用户显示原文按钮
                    }
                });
            }

            //单点退出
            imageView.setOnSingleClickListener(ViewImageActivity.this::finish);

            //长按
            imageView.setOnLongClickListener(() -> {
                final Dialog dialog = new Dialog(ViewImageActivity.this);

                LinearLayout container1 = new LinearLayout(ViewImageActivity.this);
                container1.setOrientation(LinearLayout.VERTICAL);
                container1.setBackgroundColor(Color.WHITE);

                final TextView reportTv = new TextView(ViewImageActivity.this);
                reportTv.setPadding(DisplayUtils.dip2px(ViewImageActivity.this, 20), DisplayUtils.dip2px(ViewImageActivity.this, 12),
                        0, DisplayUtils.dip2px(ViewImageActivity.this, 12));
                reportTv.setText(R.string.save_pic);
                reportTv.setTextSize(17);
                reportTv.setTextColor(ContextCompat.getColor(getApplicationContext(), R.color.title));
                reportTv.setBackgroundResource(R.drawable.textview_white_style);
                int widthPixels = getResources().getDisplayMetrics().widthPixels;
                reportTv.setLayoutParams(new LinearLayout.LayoutParams((widthPixels * 9) / 10,
                        LinearLayout.LayoutParams.WRAP_CONTENT));
                container1.addView(reportTv);

                dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
                dialog.setContentView(container1);
                dialog.show();

                reportTv.setOnClickListener(v -> {
                    findImageBM();
                    dialog.cancel();
                });
            });

            view.setTag(position);
            container.addView(view);
            return view;
        }

        private void findImageBM() {
            String url = urls.get(mViewPager.getCurrentItem());
            String limitUrl = ImageUtils.addLimitWidth(urls.get(mViewPager.getCurrentItem()), mLimitWidth);
            String targetUrl = null;

            if (mImagePipeline.isInBitmapMemoryCache(ImageRequest.fromUri(url))) {
                targetUrl = url;
            } else if (mImagePipeline.isInBitmapMemoryCache(ImageRequest.fromUri(limitUrl))) {
                targetUrl = limitUrl;
            } else {
                targetUrl = url;
            }

            if (TextUtils.isEmpty(targetUrl)) return;

            ImageRequest imageRequest = ImageRequestBuilder
                    .newBuilderWithSource(Uri.parse(targetUrl))
                    .setProgressiveRenderingEnabled(true)
                    .build();

            DataSource<CloseableReference<CloseableImage>>
                    dataSource = mImagePipeline.fetchDecodedImage(imageRequest, ViewImageActivity.this);
            final String finalCurUrl = targetUrl;
            dataSource.subscribe(new BaseBitmapDataSubscriber() {
                @Override
                protected void onNewResultImpl(Bitmap bitmap) {
                    saveImage(bitmap, finalCurUrl);
                }

                @Override
                protected void onFailureImpl(DataSource<CloseableReference<CloseableImage>> dataSource) {

                }
            }, CallerThreadExecutor.getInstance());
        }

        private void saveImage(Bitmap bitmap, String curUrl) {

            String fileName = curUrl.substring(curUrl.lastIndexOf("/"));
            String savePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Pictures/ghzhushou/";

            try {
                File file = new File(savePath);
                if (!file.exists()) {
                    file.mkdirs();
                }

                File f = new File(savePath, fileName);
                if (f.exists()) {
                    f.delete();
                }

                FileOutputStream out = new FileOutputStream(f);
                bitmap.compress(Bitmap.CompressFormat.PNG, 90, out);
                out.flush();
                out.close();
                Utils.log("图片保存成功");
                Utils.toast(ViewImageActivity.this, "图片已保存到/Pictures/ghzhushou/");
                MessageShareUtils.refreshImage(new File(savePath), ViewImageActivity.this);
            } catch (IOException e) {
                Utils.log("图片保存失败：" + e.toString());
                System.out.println(e);
            }
        }

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

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

        @Override
        public void onSingleTap() {
            finish();
        }

    }
}