// Copyright (c) 2016, 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.graph;

import com.android.tools.r8.utils.AndroidApiLevel;
import com.google.common.collect.Iterables;
import java.util.function.BiFunction;
import java.util.function.Function;

public abstract class DexMember<D extends DexEncodedMember<D, R>, R extends DexMember<D, R>>
    extends DexReference implements NamingLensComparable<R> {

  public final DexType holder;
  public final DexString name;

  public DexMember(DexType holder, DexString name) {
    assert holder != null;
    this.holder = holder;
    assert name != null;
    this.name = name;
  }

  public abstract <T> T apply(
      Function<DexField, T> fieldConsumer, Function<DexMethod, T> methodConsumer);

  public abstract DexEncodedMember<?, ?> lookupOnClass(DexClass clazz);

  public abstract DexClassAndMember<?, ?> lookupMemberOnClass(DexClass clazz);

  public abstract ProgramMember<?, ?> lookupOnProgramClass(DexProgramClass clazz);

  public abstract boolean match(R entry);

  public abstract boolean match(D entry);

  @Override
  public DexType getContextType() {
    return holder;
  }

  public DexType getHolderType() {
    return holder;
  }

  public DexString getName() {
    return name;
  }

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

  @Override
  public DexMember<D, R> asDexMember() {
    return this;
  }

  public abstract Iterable<DexType> getReferencedTypes();

  public Iterable<DexType> getReferencedBaseTypes(DexItemFactory dexItemFactory) {
    return Iterables.transform(getReferencedTypes(), type -> type.toBaseType(dexItemFactory));
  }

  public AndroidApiLevel computeApiLevelForReferencedTypes(
      AppView<?> appView, BiFunction<DexReference, AndroidApiLevel, AndroidApiLevel> computeMax) {
    AndroidApiLevel computedLevel =
        appView.options().apiModelingOptions().enableApiCallerIdentification
            ? appView.options().minApiLevel
            : AndroidApiLevel.UNKNOWN;
    for (DexType type : getReferencedBaseTypes(appView.dexItemFactory())) {
      computedLevel = computeMax.apply(type, computedLevel);
    }
    return computedLevel;
  }
}