// Copyright 2024 The Bazel Authors. All rights reserved.
//
// 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.
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package com.google.devtools.build.lib.skyframe.config;

import com.google.auto.value.AutoValue;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.devtools.build.lib.analysis.config.FragmentOptions;
import com.google.devtools.build.lib.cmdline.RepositoryMapping;
import com.google.devtools.common.options.OptionsParser;
import com.google.devtools.common.options.OptionsParsingException;
import com.google.devtools.common.options.OptionsParsingResult;
import javax.annotation.Nullable;

/**
 * Container for storing a set of native and Starlark flag settings in separate buckets.
 *
 * <p>This is necessary because native and Starlark flags are parsed with different logic.
 */
@AutoValue
public abstract class NativeAndStarlarkFlags {

  /** Builder for new {@link NativeAndStarlarkFlags} instances. */
  @AutoValue.Builder
  public abstract static class Builder {
    public abstract Builder nativeFlags(ImmutableList<String> nativeFlags);

    public abstract Builder starlarkFlags(ImmutableMap<String, Object> starlarkFlags);

    public abstract Builder optionsClasses(
        ImmutableSet<Class<? extends FragmentOptions>> optionsClasses);

    public abstract Builder repoMapping(RepositoryMapping repoMapping);

    public abstract NativeAndStarlarkFlags build();
  }

  /** Returns a new {@link Builder}. */
  public static Builder builder() {
    return new AutoValue_NativeAndStarlarkFlags.Builder()
        .nativeFlags(ImmutableList.of())
        .starlarkFlags(ImmutableMap.of())
        .optionsClasses(ImmutableSet.of());
  }

  public abstract ImmutableList<String> nativeFlags();

  public abstract ImmutableMap<String, Object> starlarkFlags();

  abstract ImmutableSet<Class<? extends FragmentOptions>> optionsClasses();

  @Nullable
  abstract RepositoryMapping repoMapping();

  public OptionsParsingResult parse() throws OptionsParsingException {
    OptionsParser parser =
        OptionsParser.builder()
            .optionsClasses(this.optionsClasses())
            // We need the ability to re-map internal options in the mappings file.
            .ignoreInternalOptions(false)
            .withConversionContext(this.repoMapping())
            .build();
    parser.parse(this.nativeFlags().asList());
    parser.setStarlarkOptions(this.starlarkFlags());
    return parser;
  }
}