package org.thoughtcrime.securesms.giph.ui;


import android.content.Context;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ProgressBar;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.recyclerview.widget.RecyclerView;

import com.bumptech.glide.RequestBuilder;
import com.bumptech.glide.load.DataSource;
import com.bumptech.glide.load.engine.DiskCacheStrategy;
import com.bumptech.glide.load.engine.GlideException;
import com.bumptech.glide.load.resource.drawable.DrawableTransitionOptions;
import com.bumptech.glide.load.resource.gif.GifDrawable;
import com.bumptech.glide.request.RequestListener;
import com.bumptech.glide.request.target.Target;
import com.bumptech.glide.util.ByteBufferUtil;

import org.session.libsession.utilities.MaterialColor;
import org.session.libsession.utilities.Util;
import org.session.libsession.utilities.ViewUtil;
import org.session.libsignal.utilities.Log;
import org.thoughtcrime.securesms.giph.model.ChunkedImageUrl;
import org.thoughtcrime.securesms.giph.model.GiphyImage;
import org.thoughtcrime.securesms.mms.GlideApp;
import org.thoughtcrime.securesms.mms.GlideRequests;

import java.util.List;
import java.util.concurrent.ExecutionException;

import network.loki.messenger.R;


class GiphyAdapter extends RecyclerView.Adapter<GiphyAdapter.GiphyViewHolder> {

  private static final String TAG = GiphyAdapter.class.getSimpleName();

  private final Context       context;
  private final GlideRequests glideRequests;

  private List<GiphyImage>     images;
  private OnItemClickListener  listener;

  class GiphyViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener, RequestListener<Drawable> {

    public AspectRatioImageView thumbnail;
    public GiphyImage           image;
    public ProgressBar          gifProgress;
    public volatile boolean     modelReady;

    GiphyViewHolder(View view) {
      super(view);
      thumbnail   = ViewUtil.findById(view, R.id.thumbnail);
      gifProgress = ViewUtil.findById(view, R.id.gif_progress);
      thumbnail.setOnClickListener(this);
      gifProgress.setVisibility(View.GONE);
    }

    @Override
    public void onClick(View v) {
      if (listener != null) listener.onClick(this);
    }

    @Override
    public boolean onLoadFailed(@Nullable GlideException e, Object model, Target<Drawable> target, boolean isFirstResource) {
      Log.w(TAG, e);

      synchronized (this) {
        if (new ChunkedImageUrl(image.getGifUrl(), image.getGifSize()).equals(model)) {
          this.modelReady = true;
          notifyAll();
        }
      }

      return false;
    }

    @Override
    public boolean onResourceReady(Drawable resource, Object model, Target<Drawable> target, DataSource dataSource, boolean isFirstResource) {
      synchronized (this) {
        if (new ChunkedImageUrl(image.getGifUrl(), image.getGifSize()).equals(model)) {
          this.modelReady = true;
          notifyAll();
        }
      }

      return false;
    }


    public byte[] getData(boolean forMms) throws ExecutionException, InterruptedException {
      synchronized (this) {
        while (!modelReady) {
          Util.wait(this, 0);
        }
      }

      GifDrawable drawable = glideRequests.asGif()
                                          .load(forMms ? new ChunkedImageUrl(image.getGifMmsUrl(), image.getMmsGifSize()) :
                                                         new ChunkedImageUrl(image.getGifUrl(), image.getGifSize()))
                                          .submit(Target.SIZE_ORIGINAL, Target.SIZE_ORIGINAL)
                                          .get();

      return ByteBufferUtil.toBytes(drawable.getBuffer());
    }

    public synchronized void setModelReady() {
      this.modelReady = true;
      notifyAll();
    }
  }

  GiphyAdapter(@NonNull Context context, @NonNull GlideRequests glideRequests, @NonNull List<GiphyImage> images) {
    this.context       = context.getApplicationContext();
    this.glideRequests = glideRequests;
    this.images        = images;
  }

  public void setImages(@NonNull List<GiphyImage> images) {
    this.images = images;
    notifyDataSetChanged();
  }

  public void addImages(List<GiphyImage> images) {
    this.images.addAll(images);
    notifyDataSetChanged();
  }

  @Override
  public @NonNull GiphyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    View itemView = LayoutInflater.from(parent.getContext())
                                  .inflate(R.layout.giphy_thumbnail, parent, false);

    return new GiphyViewHolder(itemView);
  }

  @Override
  public void onBindViewHolder(@NonNull GiphyViewHolder holder, int position) {
    GiphyImage image = images.get(position);

    holder.modelReady = false;
    holder.image      = image;
    holder.thumbnail.setAspectRatio(image.getGifAspectRatio());
    holder.gifProgress.setVisibility(View.GONE);

    RequestBuilder<Drawable> thumbnailRequest = GlideApp.with(context)
                                                        .load(new ChunkedImageUrl(image.getStillUrl(), image.getStillSize()))
                                                        .diskCacheStrategy(DiskCacheStrategy.NONE);

    if (org.thoughtcrime.securesms.util.Util.isLowMemory(context)) {
      glideRequests.load(new ChunkedImageUrl(image.getStillUrl(), image.getStillSize()))
                   .placeholder(new ColorDrawable(Util.getRandomElement(MaterialColor.values()).toConversationColor(context)))
                   .diskCacheStrategy(DiskCacheStrategy.NONE)
                   .transition(DrawableTransitionOptions.withCrossFade())
                   .listener(holder)
                   .into(holder.thumbnail);

      holder.setModelReady();
    } else {
      glideRequests.load(new ChunkedImageUrl(image.getGifUrl(), image.getGifSize()))
                   .thumbnail(thumbnailRequest)
                   .placeholder(new ColorDrawable(Util.getRandomElement(MaterialColor.values()).toConversationColor(context)))
                   .diskCacheStrategy(DiskCacheStrategy.NONE)
                   .transition(DrawableTransitionOptions.withCrossFade())
                   .listener(holder)
                   .into(holder.thumbnail);
    }
  }

  @Override
  public void onViewRecycled(@NonNull GiphyViewHolder holder) {
    super.onViewRecycled(holder);
    glideRequests.clear(holder.thumbnail);
  }

  @Override
  public int getItemCount() {
    return images.size();
  }

  public void setListener(OnItemClickListener listener) {
    this.listener = listener;
  }

  public interface OnItemClickListener {
    void onClick(GiphyViewHolder viewHolder);
  }
}