// Copyright 2019 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.cpp;

import com.google.devtools.build.lib.skylarkbuildapi.FileApi;
import com.google.devtools.build.lib.skylarkbuildapi.RunfilesApi;
import com.google.devtools.build.lib.skylarkbuildapi.SkylarkRuleContextApi;
import com.google.devtools.build.lib.skylarkbuildapi.TransitiveInfoCollectionApi;
import com.google.devtools.build.lib.skylarkbuildapi.cpp.CcCompilationContextApi;
import com.google.devtools.build.lib.skylarkbuildapi.cpp.CcInfoApi;
import com.google.devtools.build.lib.skylarkbuildapi.cpp.CcLinkingContextApi;
import com.google.devtools.build.lib.skylarkbuildapi.cpp.CcToolchainProviderApi;
import com.google.devtools.build.lib.skylarkbuildapi.cpp.CompilationInfoApi;
import com.google.devtools.build.lib.skylarkbuildapi.cpp.FeatureConfigurationApi;
import com.google.devtools.build.lib.skylarkbuildapi.cpp.GoCcLinkParamsInfoApi;
import com.google.devtools.build.lib.skylarkbuildapi.cpp.GoWrapCcHelperApi;
import com.google.devtools.build.lib.skylarkbuildapi.cpp.GoWrapCcInfoApi;
import com.google.devtools.build.lib.skylarkbuildapi.cpp.PyCcLinkParamsProviderApi;
import com.google.devtools.build.lib.skylarkbuildapi.cpp.PyWrapCcHelperApi;
import com.google.devtools.build.lib.skylarkbuildapi.cpp.PyWrapCcInfoApi;
import com.google.devtools.build.lib.skylarkbuildapi.cpp.WrapCcHelperApi;
import com.google.devtools.build.lib.skylarkbuildapi.cpp.WrapCcIncludeProviderApi;
import com.google.devtools.build.lib.skylarkbuildapi.go.GoConfigurationApi;
import com.google.devtools.build.lib.skylarkbuildapi.go.GoContextInfoApi;
import com.google.devtools.build.lib.skylarkbuildapi.go.GoPackageInfoApi;
import com.google.devtools.build.lib.skylarkinterface.SkylarkPrinter;
import com.google.devtools.build.lib.syntax.Depset;
import com.google.devtools.build.lib.syntax.EvalException;
import com.google.devtools.build.lib.syntax.Sequence;
import com.google.devtools.build.lib.syntax.Tuple;

/**
 * Fake stub implementations for C++-related Starlark API which are unsupported without use of
 * --experimental_google_legacy_api.
 */
public final class GoogleLegacyStubs {

  private GoogleLegacyStubs() {}

  private static class WrapCcHelper
      implements WrapCcHelperApi<
          FeatureConfigurationApi,
          SkylarkRuleContextApi,
          CcToolchainProviderApi<FeatureConfigurationApi>,
          CompilationInfoApi,
          FileApi,
          CcCompilationContextApi,
          WrapCcIncludeProviderApi> {

    @Override
    public FeatureConfigurationApi skylarkGetFeatureConfiguration(
        SkylarkRuleContextApi skylarkRuleContext,
        CcToolchainProviderApi<FeatureConfigurationApi> ccToolchain)
        throws EvalException, InterruptedException {
      return null;
    }

    @Override
    public Depset skylarkCollectTransitiveSwigIncludes(SkylarkRuleContextApi skylarkRuleContext) {
      return null;
    }

    @Override
    public CompilationInfoApi skylarkCreateCompileActions(
        SkylarkRuleContextApi skylarkRuleContext,
        FeatureConfigurationApi featureConfiguration,
        CcToolchainProviderApi<FeatureConfigurationApi> ccToolchain,
        FileApi ccFile,
        FileApi headerFile,
        Sequence<?> depCcCompilationContexts, // <CcCompilationContextApi>
        Sequence<?> targetCopts /* <String> */)
        throws EvalException, InterruptedException {
      return null;
    }

    @Override
    public String skylarkGetMangledTargetName(SkylarkRuleContextApi skylarkRuleContext)
        throws EvalException, InterruptedException {
      return null;
    }

    @Override
    public WrapCcIncludeProviderApi getWrapCcIncludeProvider(
        SkylarkRuleContextApi skylarkRuleContext, Depset swigIncludes)
        throws EvalException, InterruptedException {
      return null;
    }

    @Override
    public void registerSwigAction(
        SkylarkRuleContextApi skylarkRuleContext,
        CcToolchainProviderApi<FeatureConfigurationApi> ccToolchain,
        FeatureConfigurationApi featureConfiguration,
        CcCompilationContextApi wrapperCcCompilationContext,
        Depset swigIncludes,
        FileApi swigSource,
        Sequence<?> subParameters, // <String>
        FileApi ccFile,
        FileApi headerFile,
        Sequence<?> outputFiles, // <FileApi>
        Object outDir,
        Object javaDir,
        Depset auxiliaryInputs,
        String swigAttributeName,
        Object zipTool)
        throws EvalException, InterruptedException {}
  }

  /**
   * Fake no-op implementation of {@link PyWrapCcHelperApi}. This implementation should be
   * unreachable without (discouraged) use of --experimental_google_legacy_api.
   */
  public static class PyWrapCcHelper extends WrapCcHelper
      implements PyWrapCcHelperApi<
          FileApi,
          SkylarkRuleContextApi,
          CcInfoApi,
          FeatureConfigurationApi,
          CcToolchainProviderApi<FeatureConfigurationApi>,
          CompilationInfoApi,
          CcCompilationContextApi,
          WrapCcIncludeProviderApi> {

    @Override
    public Sequence<String> getPyExtensionLinkopts(SkylarkRuleContextApi skylarkRuleContext) {
      return null;
    }

    @Override
    public Depset getTransitivePythonSources(
        SkylarkRuleContextApi skylarkRuleContext, FileApi pyFile) {
      return null;
    }

    @Override
    public RunfilesApi getPythonRunfiles(
        SkylarkRuleContextApi skylarkRuleContext, Depset filesToBuild) {
      return null;
    }

    @Override
    public PyWrapCcInfoApi getPyWrapCcInfo(
        SkylarkRuleContextApi skylarkRuleContext, CcInfoApi ccInfo) {
      return null;
    }
  }

  /**
   * Fake no-op implementation of {@link GoWrapCcHelperApi}. This implementation should be
   * unreachable without (discouraged) use of --experimental_google_legacy_api.
   */
  public static class GoWrapCcHelper extends WrapCcHelper
      implements GoWrapCcHelperApi<
          FileApi,
          SkylarkRuleContextApi,
          CcInfoApi,
          FeatureConfigurationApi,
          CcToolchainProviderApi<FeatureConfigurationApi>,
          CcLinkingContextApi<FileApi>,
          GoConfigurationApi,
          GoContextInfoApi,
          TransitiveInfoCollectionApi,
          CompilationInfoApi,
          CcCompilationContextApi,
          WrapCcIncludeProviderApi> {

    @Override
    public RunfilesApi skylarkGetGoRunfiles(SkylarkRuleContextApi skylarkRuleContext) {
      return null;
    }

    @Override
    public int getArchIntSize(GoConfigurationApi goConfig) {
      return 0;
    }

    @Override
    public GoContextInfoApi skylarkCollectTransitiveGoContextGopkg(
        SkylarkRuleContextApi skylarkRuleContext,
        FileApi export,
        FileApi pkg,
        FileApi gopkg,
        Object skylarkWrapContext,
        CcInfoApi ccInfo) {
      return null;
    }

    @Override
    public GoWrapCcInfoApi getGoWrapCcInfo(
        SkylarkRuleContextApi skylarkRuleContext, CcInfoApi ccInfo) {
      return null;
    }

    @Override
    public GoCcLinkParamsInfoApi getGoCcLinkParamsProvider(
        SkylarkRuleContextApi ruleContext, CcLinkingContextApi<FileApi> ccLinkingContext) {
      return null;
    }

    @Override
    public Tuple<FileApi> createGoCompileActions(
        SkylarkRuleContextApi skylarkRuleContext,
        CcToolchainProviderApi<FeatureConfigurationApi> ccToolchainProvider,
        Sequence<?> srcs, // <FileApi>
        Sequence<?> deps /* <TransitiveInfoCollectionApi> */) {
      return null;
    }

    @Override
    public Tuple<FileApi> createGoCompileActionsGopkg(
        SkylarkRuleContextApi skylarkRuleContext,
        CcToolchainProviderApi<FeatureConfigurationApi> ccToolchainProvider,
        Sequence<?> srcs, // <FileApi>
        Sequence<?> deps /* <TransitiveInfoCollectionApi> */) {
      return null;
    }

    @Override
    public GoPackageInfoApi createTransitiveGopackageInfo(
        SkylarkRuleContextApi skylarkRuleContext,
        FileApi skylarkGopkg,
        FileApi export,
        FileApi swigOutGo) {
      return null;
    }

    @Override
    public Depset /*<FileApi>*/ getGopackageFilesForStarlark(
        SkylarkRuleContextApi skylarkRuleContext, FileApi skylarkGopkg) {
      return null;
    }
  }

  /**
   * Fake no-op implementation of {@link PyWrapCcInfoApi.Provider}. This implementation should be
   * unreachable without (discouraged) use of --experimental_google_legacy_api.
   */
  public static class PyWrapCcInfoProvider implements PyWrapCcInfoApi.Provider {

    @Override
    public void repr(SkylarkPrinter printer) {
      printer.append("<unknown object>");
    }
  }

  /**
   * Fake no-op implementation of {@link PyCcLinkParamsProviderApi.Provider}. This implementation
   * should be unreachable without (discouraged) use of --experimental_google_legacy_api.
   */
  public static class PyCcLinkParamsProvider implements PyCcLinkParamsProviderApi.Provider {

    @Override
    public void repr(SkylarkPrinter printer) {
      printer.append("<unknown object>");
    }
  }
}