/*
 * Copyright 2017 The Android Open Source Project
 *
 * 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.android.tv.twopanelsettings.slices.compat.builders;

import android.content.Context;
import android.net.Uri;
import android.util.Pair;
import androidx.annotation.NonNull;
import com.android.tv.twopanelsettings.slices.compat.Clock;
import com.android.tv.twopanelsettings.slices.compat.Slice;
import com.android.tv.twopanelsettings.slices.compat.SliceManager;
import com.android.tv.twopanelsettings.slices.compat.SliceProvider;
import com.android.tv.twopanelsettings.slices.compat.SliceSpec;
import com.android.tv.twopanelsettings.slices.compat.SystemClock;
import com.android.tv.twopanelsettings.slices.compat.builders.impl.TemplateBuilderImpl;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;

/**
 * Base class of builders of various template types.
 *
 * <p>Slice framework has been deprecated, it will not receive any updates moving forward. If you
 * are looking for a framework that handles communication across apps, consider using {@link
 * android.app.appsearch.AppSearchManager}.
 */
// @Deprecated // Supported for TV
public abstract class TemplateSliceBuilder {

  private static final String TAG = "TemplateSliceBuilder";

  private final Slice.Builder mBuilder;
  private final Context mContext;
  private final TemplateBuilderImpl mImpl;
  private List<SliceSpec> mSpecs;

  /** */
  // @RestrictTo(LIBRARY)
  protected TemplateSliceBuilder(TemplateBuilderImpl impl) {
    mContext = null;
    mBuilder = null;
    mImpl = impl;
    setImpl(impl);
  }

  /** */
  // @RestrictTo(LIBRARY)
  public TemplateSliceBuilder(Context context, Uri uri) {
    mBuilder = new Slice.Builder(uri);
    mContext = context;
    mSpecs = getSpecs(uri);
    mImpl = selectImpl();
    if (mImpl == null) {
      throw new IllegalArgumentException("No valid specs found");
    }
    setImpl(mImpl);
  }

  /** Construct the slice. */
  @NonNull
  public Slice build() {
    return mImpl.build();
  }

  /** */
  // @RestrictTo(LIBRARY)
  protected Slice.Builder getBuilder() {
    return mBuilder;
  }

  /** */
  // @RestrictTo(LIBRARY)
  abstract void setImpl(TemplateBuilderImpl impl);

  /** */
  // @RestrictTo(LIBRARY)
  protected TemplateBuilderImpl selectImpl() {
    return null;
  }

  /** */
  // @RestrictTo(LIBRARY)
  protected boolean checkCompatible(SliceSpec candidate) {
    final int size = mSpecs.size();
    for (int i = 0; i < size; i++) {
      if (mSpecs.get(i).canRender(candidate)) {
        return true;
      }
    }
    return false;
  }

  private List<SliceSpec> getSpecs(Uri uri) {
    if (SliceProvider.getCurrentSpecs() != null) {
      return new ArrayList<>(SliceProvider.getCurrentSpecs());
    }
    Set<SliceSpec> pinnedSpecs = SliceManager.getInstance(mContext).getPinnedSpecs(uri);
    return new ArrayList<>(pinnedSpecs);
  }

  /** */
  // @RestrictTo(LIBRARY)
  protected Clock getClock() {
    if (SliceProvider.getClock() != null) {
      return SliceProvider.getClock();
    }
    return new SystemClock();
  }

  /** This is for typing, to clean up the code. */
  // @RestrictTo(LIBRARY)
  @SuppressWarnings("unchecked")
  static <T> Pair<SliceSpec, Class<? extends TemplateBuilderImpl>> pair(
      SliceSpec spec, Class<T> cls) {
    return new Pair(spec, cls);
  }
}