// Copyright (c) 2020, the R8 project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

package com.android.tools.r8.naming.mappinginformation;

import com.android.tools.r8.naming.MapVersion;
import com.android.tools.r8.naming.MappingComposeException;
import com.android.tools.r8.naming.mappinginformation.MappingInformation.ReferentialMappingInformation;
import com.google.gson.JsonObject;
import com.google.gson.JsonPrimitive;
import java.util.function.Consumer;

public class CompilerSynthesizedMappingInformation extends ReferentialMappingInformation {

  private static final CompilerSynthesizedMappingInformation INSTANCE =
      new CompilerSynthesizedMappingInformation();
  public static final MapVersion SUPPORTED_VERSION = MapVersion.MAP_VERSION_1_0;
  public static final String ID = "com.android.tools.r8.synthesized";

  public static boolean isSupported(MapVersion version) {
    return version.isGreaterThanOrEqualTo(SUPPORTED_VERSION);
  }

  private CompilerSynthesizedMappingInformation() {}

  public static CompilerSynthesizedMappingInformation getInstance() {
    return INSTANCE;
  }

  @Override
  public String getId() {
    return ID;
  }

  @Override
  public boolean isCompilerSynthesizedMappingInformation() {
    return true;
  }

  @Override
  public CompilerSynthesizedMappingInformation asCompilerSynthesizedMappingInformation() {
    return this;
  }

  @Override
  public MappingInformation compose(MappingInformation existing) throws MappingComposeException {
    // There is no difference between taking the existing or new so we just do a consistent choice.
    return existing;
  }

  @Override
  public boolean allowOther(MappingInformation information) {
    return true;
  }

  @Override
  public String serialize() {
    JsonObject object = new JsonObject();
    object.add(MAPPING_ID_KEY, new JsonPrimitive(ID));
    return object.toString();
  }

  public static void deserialize(
      MapVersion version,
      Consumer<MappingInformation> onMappingInfo) {
    if (isSupported(version)) {
      onMappingInfo.accept(getInstance());
    }
  }
}