// Copyright 2018 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.starlarkbuildapi.cpp;

import com.google.devtools.build.docgen.annot.DocCategory;
import com.google.devtools.build.lib.collect.nestedset.Depset;
import com.google.devtools.build.lib.packages.semantics.BuildLanguageOptions;
import com.google.devtools.build.lib.starlarkbuildapi.FileApi;
import javax.annotation.Nullable;
import net.starlark.java.annot.StarlarkBuiltin;
import net.starlark.java.annot.StarlarkMethod;
import net.starlark.java.eval.EvalException;
import net.starlark.java.eval.Sequence;
import net.starlark.java.eval.StarlarkSemantics;
import net.starlark.java.eval.StarlarkThread;
import net.starlark.java.eval.StarlarkValue;

/** Wrapper for every C++ linking provider. */
@StarlarkBuiltin(
    name = "LinkingContext",
    category = DocCategory.BUILTIN,
    doc =
        "Immutable store of information needed for C++ linking that is aggregated across "
            + "dependencies.")
public interface CcLinkingContextApi<FileT extends FileApi> extends StarlarkValue {
  @StarlarkMethod(
      name = "user_link_flags",
      doc = "Returns the list of user link flags passed as strings.",
      disableWithFlag = BuildLanguageOptions.INCOMPATIBLE_REQUIRE_LINKER_INPUT_CC_API,
      structField = true)
  Sequence<String> getStarlarkUserLinkFlags();

  @StarlarkMethod(
      name = "libraries_to_link",
      doc =
          "Returns the depset of <code>LibraryToLink</code>. May return a list but this is"
              + "deprecated. See #8118.",
      disableWithFlag = BuildLanguageOptions.INCOMPATIBLE_REQUIRE_LINKER_INPUT_CC_API,
      structField = true,
      useStarlarkSemantics = true)
  Object getStarlarkLibrariesToLink(StarlarkSemantics semantics);

  @StarlarkMethod(
      name = "additional_inputs",
      doc = "Returns the depset of additional inputs, e.g.: linker scripts.",
      disableWithFlag = BuildLanguageOptions.INCOMPATIBLE_REQUIRE_LINKER_INPUT_CC_API,
      structField = true)
  Depset getStarlarkNonCodeInputs();

  @StarlarkMethod(
      name = "linker_inputs",
      doc = "Returns the depset of linker inputs.",
      structField = true)
  Depset getStarlarkLinkerInputs();

  /**
   * TODO(bazel-team): Do not expose this publicly. This was a mistake. Linkstamps should be
   * accessed through linker_inputs. Remove this method.
   */
  @StarlarkMethod(name = "linkstamps", documented = false, useStarlarkThread = true)
  Depset getLinkstampsForStarlark(StarlarkThread thread) throws EvalException;

  @StarlarkMethod(
      name = "go_link_c_archive",
      documented = false,
      allowReturnNones = true,
      useStarlarkThread = true)
  @Nullable
  ExtraLinkTimeLibraryApi getGoLinkCArchiveForStarlark(StarlarkThread thread) throws EvalException;

  @StarlarkMethod(name = "extra_link_time_libraries", documented = false, useStarlarkThread = true)
  public Object getExtraLinkTimeLibrariesForStarlark(StarlarkThread thread) throws EvalException;
}
