content: /*
   * Copyright (c) 2017. André Mion
   *
   * 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 com.andremion.heroes.ui.section.view;
  
  import android.app.Activity;
  import android.content.Intent;
  import android.databinding.DataBindingUtil;
  import android.os.Bundle;
  import android.support.v4.app.ActivityCompat;
  import android.support.v4.app.ActivityOptionsCompat;
  import android.support.v4.view.ViewCompat;
  import android.support.v4.view.ViewPager;
  import android.support.v7.app.AppCompatActivity;
  import android.view.View;
  
  import com.andremion.heroes.R;
  import com.andremion.heroes.api.data.SectionVO;
  import com.andremion.heroes.databinding.ActivitySectionBinding;
  import com.andremion.heroes.ui.section.SectionContract;
  import com.andremion.heroes.ui.section.SectionPresenter;
  import com.andremion.heroes.ui.util.PagerSharedElementCallback;
  
  import java.io.Serializable;
  import java.util.List;
  
  
  public class SectionActivity extends AppCompatActivity implements SectionContract.View {
  
      private static final String EXTRA_ATTRIBUTION = SectionActivity.class.getPackage().getName() + ".extra.ATTRIBUTION";
      private static final String EXTRA_ENTRIES = SectionActivity.class.getPackage().getName() + ".extra.ENTRIES";
      private static final String EXTRA_POSITION = SectionActivity.class.getPackage().getName() + ".extra.POSITION";
      private static final String EXTRA_TYPE = SectionActivity.class.getPackage().getName() + ".extra.TYPE";
      public static final int EXTRA_NOT_FOUND = -1;
  
      public static void start(Activity activity, @SectionVO.Type int type, View heroView, String attribution, List<SectionVO> entries, int position) {
  
          ActivityOptionsCompat options = ActivityOptionsCompat
                  .makeSceneTransitionAnimation(activity,
                          heroView, ViewCompat.getTransitionName(heroView));
          Intent intent = new Intent(activity, SectionActivity.class);
          intent.putExtra(EXTRA_TYPE, type);
          intent.putExtra(EXTRA_ATTRIBUTION, attribution);
          intent.putExtra(EXTRA_ENTRIES, (Serializable) entries);
          intent.putExtra(EXTRA_POSITION, position);
  
          ActivityCompat.startActivity(activity, intent, options.toBundle());
      }
  
      public static int getType(int resultCode, Intent data) {
          if (resultCode == RESULT_OK && data != null && data.hasExtra(EXTRA_TYPE)) {
              return data.getIntExtra(EXTRA_TYPE, EXTRA_NOT_FOUND);
          }
          return EXTRA_NOT_FOUND;
      }
  
      public static int getPosition(int resultCode, Intent data) {
          if (resultCode == RESULT_OK && data != null && data.hasExtra(EXTRA_POSITION)) {
              return data.getIntExtra(EXTRA_POSITION, EXTRA_NOT_FOUND);
          }
          return EXTRA_NOT_FOUND;
      }
  
      private ViewPager mViewPager;
      private SectionPresenter mPresenter;
      private int mType;
      private PagerSharedElementCallback mSharedElementCallback;
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          ActivitySectionBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_section);
  
          // Postpone transition until the image of ViewPager's initial item is loaded
          supportPostponeEnterTransition();
          setEnterSharedElementCallback(mSharedElementCallback = new PagerSharedElementCallback());
  
          mViewPager = (ViewPager) findViewById(R.id.pager);
  
          mType = getIntent().getExtras().getInt(EXTRA_TYPE);
          String attribution = getIntent().getStringExtra(EXTRA_ATTRIBUTION);
          //noinspection unchecked
          List<SectionVO> entries = (List<SectionVO>) getIntent().getExtras().get(EXTRA_ENTRIES);
          assert entries != null;
          int position = getIntent().getExtras().getInt(EXTRA_POSITION);
  
          if (savedInstanceState == null) {
              mPresenter = new SectionPresenter(entries, position);
          } else {
              mPresenter = (SectionPresenter) getLastCustomNonConfigurationInstance();
          }
          mPresenter.attachView(this);
  
          binding.setAttribution(attribution);
          binding.setPresenter(mPresenter);
      }
  
      @Override
      public void finish() {
          setResult();
          super.finish();
      }
  
      @Override
      public void finishAfterTransition() {
          setResult();
          super.finishAfterTransition();
      }
  
      @Override
      public Object onRetainCustomNonConfigurationInstance() {
          return mPresenter;
      }
  
      @Override
      protected void onDestroy() {
          mPresenter.detachView();
          super.onDestroy();
      }
  
      @Override
      public void showItems(List<SectionVO> entries, int position) {
          SectionPagerAdapter adapter = new SectionPagerAdapter(this, mType, entries, mSharedElementCallback);
          adapter.setInitialPosition(position);
          mViewPager.setAdapter(adapter);
          mViewPager.setCurrentItem(position, false);
      }
  
      @Override
      public void close() {
          super.onBackPressed();
      }
  
      private void setResult() {
          int position = mViewPager.getCurrentItem();
          Intent data = new Intent();
          data.putExtra(EXTRA_TYPE, mType);
          data.putExtra(EXTRA_POSITION, position);
          setResult(RESULT_OK, data);
      }
  
  }
  