// Copyright 2014 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.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.devtools.build.lib.rules.python;

import com.google.common.base.Function;
import com.google.devtools.build.lib.analysis.TransitiveInfoCollection;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
import com.google.devtools.build.lib.packages.NativeInfo;
import com.google.devtools.build.lib.packages.NativeProvider;
import com.google.devtools.build.lib.rules.cpp.AbstractCcLinkParamsStore;
import com.google.devtools.build.lib.rules.cpp.CcLinkingInfo;
import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec;
import com.google.devtools.build.lib.skylarkinterface.SkylarkCallable;
import com.google.devtools.build.lib.skylarkinterface.SkylarkModule;
import com.google.devtools.build.lib.skylarkinterface.SkylarkModuleCategory;

/** A target that provides C++ libraries to be linked into Python targets. */
@Immutable
@AutoCodec
@SkylarkModule(
    name = "PyCcLinkParamsProvider",
    documented = false,
    category = SkylarkModuleCategory.PROVIDER,
    doc = "Wrapper for every C++ linking provider")
public final class PyCcLinkParamsProvider extends NativeInfo {
  public static final NativeProvider<PyCcLinkParamsProvider> PROVIDER =
      new NativeProvider<PyCcLinkParamsProvider>(
          PyCcLinkParamsProvider.class, "PyCcLinkParamsProvider") {};

  private final CcLinkingInfo ccLinkingInfo;

  public PyCcLinkParamsProvider(CcLinkingInfo ccLinkingInfo) {
    super(PROVIDER);
    this.ccLinkingInfo = ccLinkingInfo;
  }

  @SkylarkCallable(name = "cc_linking_info", doc = "", documented = false)
  public CcLinkingInfo getCcLinkingInfo() {
    return ccLinkingInfo;
  }

  public static final Function<TransitiveInfoCollection, AbstractCcLinkParamsStore> TO_LINK_PARAMS =
      input -> {
        PyCcLinkParamsProvider provider = input.get(PyCcLinkParamsProvider.PROVIDER);
        return provider == null ? null : provider.getCcLinkingInfo().getCcLinkParamsStore();
      };
}