/*
 * Copyright (C) 2016 Simon Vig Therkildsen
 *
 * 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 net.simonvt.cathode.ui.person;

import android.support.v7.util.DiffUtil;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import butterknife.BindView;
import butterknife.ButterKnife;
import java.util.List;
import javax.inject.Inject;
import net.simonvt.cathode.R;
import net.simonvt.cathode.api.enumeration.ItemType;
import net.simonvt.cathode.scheduler.MovieTaskScheduler;
import net.simonvt.cathode.scheduler.ShowTaskScheduler;
import net.simonvt.cathode.widget.RemoteImageView;

public class PersonCreditsAdapter extends RecyclerView.Adapter<PersonCreditsAdapter.ViewHolder> {

  public interface OnCreditClickListener {

    void onShowClicked(long showId, String title, String overview);

    void onMovieClicked(long movieId, String title, String overview);
  }

  @Inject ShowTaskScheduler showScheduler;
  @Inject MovieTaskScheduler movieScheduler;

  private List<PersonCredit> credits;

  private OnCreditClickListener listener;

  public PersonCreditsAdapter(List<PersonCredit> credits, OnCreditClickListener listener) {
    this.credits = credits;
    this.listener = listener;
  }

  public void setCredits(final List<PersonCredit> credits) {
    final List<PersonCredit> oldCredits = this.credits;
    this.credits = credits;

    final int oldSize = oldCredits == null ? 0 : oldCredits.size();
    final int newSize = credits.size();
    if (oldSize == 0) {
      if (credits.size() > 0) {
        notifyItemRangeInserted(0, newSize);
      }
    } else {
      DiffUtil.calculateDiff(new DiffUtil.Callback() {
        @Override public int getOldListSize() {
          return oldSize;
        }

        @Override public int getNewListSize() {
          return newSize;
        }

        @Override public boolean areItemsTheSame(int oldItemPosition, int newItemPosition) {
          final PersonCredit oldItem = oldCredits.get(oldItemPosition);
          final PersonCredit newItem = credits.get(newItemPosition);
          return oldItem.getItemId() == newItem.getItemId();
        }

        @Override public boolean areContentsTheSame(int oldItemPosition, int newItemPosition) {
          final PersonCredit oldItem = oldCredits.get(oldItemPosition);
          final PersonCredit newItem = credits.get(newItemPosition);
          return oldItem.equals(newItem);
        }
      }).dispatchUpdatesTo(this);
    }
  }

  @Override public int getItemCount() {
    return credits == null ? 0 : credits.size();
  }

  @Override public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(parent.getContext())
        .inflate(R.layout.person_item_credit_grid, parent, false);

    final ViewHolder holder = new ViewHolder(view);

    view.setOnClickListener(new View.OnClickListener() {
      @Override public void onClick(View v) {
        final int position = holder.getAdapterPosition();
        if (position != RecyclerView.NO_POSITION) {
          PersonCredit credit = credits.get(position);

          if (credit.getItemType() == ItemType.SHOW) {
            listener.onShowClicked(credit.getItemId(), credit.getTitle(), credit.getOverview());
          } else {
            listener.onMovieClicked(credit.getItemId(), credit.getTitle(), credit.getOverview());
          }
        }
      }
    });

    return holder;
  }

  @Override public void onBindViewHolder(ViewHolder holder, int position) {
    PersonCredit credit = credits.get(position);

    holder.poster.setImage(credit.getPoster());
    holder.title.setText(credit.getTitle());
    if (credit.getJob() != null) {
      holder.job.setText(credit.getJob());
    } else {
      holder.job.setText(credit.getCharacter());
    }
  }

  public static class ViewHolder extends RecyclerView.ViewHolder {

    @BindView(R.id.poster) RemoteImageView poster;
    @BindView(R.id.title) TextView title;
    @BindView(R.id.job) TextView job;

    public ViewHolder(View itemView) {
      super(itemView);
      ButterKnife.bind(this, itemView);
    }
  }
}