/*
 * Copyright 2015-present Facebook, Inc.
 *
 * 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.facebook.buck.dotnet;

import com.facebook.buck.model.BuildTarget;
import com.facebook.buck.model.Either;
import com.facebook.buck.rules.BuildRule;
import com.facebook.buck.rules.BuildRuleParams;
import com.facebook.buck.rules.BuildRuleResolver;
import com.facebook.buck.rules.CellPathResolver;
import com.facebook.buck.rules.CommonDescriptionArg;
import com.facebook.buck.rules.Description;
import com.facebook.buck.rules.HasSrcs;
import com.facebook.buck.rules.SourcePath;
import com.facebook.buck.rules.TargetGraph;
import com.facebook.buck.util.immutables.BuckStyleImmutable;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import org.immutables.value.Value;

public class CsharpLibraryDescription implements Description<CsharpLibraryDescriptionArg> {

  @Override
  public Class<CsharpLibraryDescriptionArg> getConstructorArgType() {
    return CsharpLibraryDescriptionArg.class;
  }

  @Override
  public BuildRule createBuildRule(
      TargetGraph targetGraph,
      BuildRuleParams params,
      BuildRuleResolver resolver,
      CellPathResolver cellRoots,
      CsharpLibraryDescriptionArg args) {

    ImmutableList.Builder<Either<BuildRule, String>> refsAsRules = ImmutableList.builder();
    for (Either<BuildTarget, String> ref : args.getDeps()) {
      if (ref.isLeft()) {
        refsAsRules.add(Either.ofLeft(resolver.getRule(ref.getLeft())));
      } else {
        refsAsRules.add(Either.ofRight(ref.getRight()));
      }
    }

    return new CsharpLibrary(
        params,
        args.getDllName(),
        args.getSrcs(),
        refsAsRules.build(),
        args.getResources(),
        args.getFrameworkVer());
  }

  @BuckStyleImmutable
  @Value.Immutable
  interface AbstractCsharpLibraryDescriptionArg extends CommonDescriptionArg, HasSrcs {
    FrameworkVersion getFrameworkVer();

    ImmutableMap<String, SourcePath> getResources();

    @Value.Default
    default String getDllName() {
      return getName() + ".dll";
    }

    // We may have system-provided references ("System.Core.dll") or other build targets
    ImmutableList<Either<BuildTarget, String>> getDeps();
  }
}