// 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.skylarkbuildapi.java;

import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.events.Location;
import com.google.devtools.build.lib.skylarkbuildapi.FileApi;
import com.google.devtools.build.lib.skylarkbuildapi.ProviderApi;
import com.google.devtools.build.lib.skylarkbuildapi.SkylarkActionFactoryApi;
import com.google.devtools.build.lib.skylarkbuildapi.StructApi;
import com.google.devtools.build.lib.skylarkinterface.Param;
import com.google.devtools.build.lib.skylarkinterface.SkylarkCallable;
import com.google.devtools.build.lib.skylarkinterface.SkylarkConstructor;
import com.google.devtools.build.lib.skylarkinterface.SkylarkModule;
import com.google.devtools.build.lib.skylarkinterface.SkylarkModuleCategory;
import com.google.devtools.build.lib.syntax.Environment;
import com.google.devtools.build.lib.syntax.EvalException;
import com.google.devtools.build.lib.syntax.SkylarkList;
import com.google.devtools.build.lib.syntax.SkylarkNestedSet;

/**
 * Info object encapsulating all information by java rules.
 */
@SkylarkModule(
    name = "JavaInfo",
    doc = "Encapsulates all information provided by Java rules.",
    category = SkylarkModuleCategory.PROVIDER)
public interface JavaInfoApi <FileT extends FileApi> extends StructApi {

  @SkylarkCallable(
      name = "transitive_runtime_jars",
      doc = "Depset of runtime jars required by this target",
      structField = true
  )
  public SkylarkNestedSet getTransitiveRuntimeJars();

  @SkylarkCallable(
      name = "transitive_compile_time_jars",
      doc = "Depset of compile time jars recusrively required by this target. See `compile_jars` "
          + "for more details.",
      structField = true
  )
  public SkylarkNestedSet getTransitiveCompileTimeJars();

  @SkylarkCallable(
      name = "compile_jars",
      doc = "Returns the compile time jars required by this target directly. They can be: <ul>"
          + "<li> interface jars (ijars), if an ijar tool was used, either by calling "
          + "java_common.create_provider(use_ijar=True, ...) or by passing --use_ijars on the "
          + "command line for native Java rules and `java_common.compile`</li>"
          + "<li> normal full jars, if no ijar action was requested</li>"
          + "<li> both ijars and normal full jars, if this provider was created by merging two or "
          + "more providers created with different ijar requests </li> </ul>",
      structField = true
  )
  public SkylarkNestedSet getCompileTimeJars();

  @SkylarkCallable(
      name = "full_compile_jars",
      doc = "Returns the full compile time jars required by this target directly. They can be <ul>"
          + "<li> the corresponding normal full jars of the ijars returned by `compile_jars`</li>"
          + "<li> the normal full jars returned by `compile_jars`</li></ul>"
          + "Note: `compile_jars` can return a mix of ijars and normal full jars. In that case, "
          + "`full_compile_jars` returns the corresponding full jars of the ijars and the remaining"
          + "normal full jars in `compile_jars`.",
      structField = true
  )
  public SkylarkNestedSet getFullCompileTimeJars();

  @SkylarkCallable(
      name = "source_jars",
      doc = "Returns a list of jar files containing all the uncompiled source files (including "
      + "those generated by annotations) from the target itself, i.e. NOT including the sources of "
      + "the transitive dependencies",
      structField = true
  )
  public SkylarkList<FileT> getSourceJars();

  @SkylarkCallable(
    name = "outputs",
    doc = "Returns information about outputs of this Java target.",
    structField = true,
    allowReturnNones = true
  )
  public JavaRuleOutputJarsProviderApi<?> getOutputJars();

  @SkylarkCallable(
      name = "annotation_processing",
      structField = true,
      allowReturnNones = true,
      doc = "Returns information about annotation processing for this Java target."
  )
  public JavaAnnotationProcessingApi<?> getGenJarsProvider();

  @SkylarkCallable(
    name = "compilation_info",
    structField = true,
    allowReturnNones = true,
    doc = "Returns compilation information for this Java target."
  )
  public JavaCompilationInfoProviderApi<?> getCompilationInfoProvider();

  @SkylarkCallable(
      name = "runtime_output_jars",
      doc = "Returns the runtime output jars provided by this Java target.",
      structField = true)
  public SkylarkList<FileT> getRuntimeOutputJars();

  @SkylarkCallable(
    name = "transitive_deps",
    doc = "Returns the transitive set of Jars required to build the target.",
    structField = true
  )
  public NestedSet<FileT> getTransitiveDeps();

  @SkylarkCallable(
    name = "transitive_runtime_deps",
    doc = "Returns the transitive set of Jars required on the target's runtime classpath.",
    structField = true
  )
  public NestedSet<FileT> getTransitiveRuntimeDeps();

  @SkylarkCallable(
    name = "transitive_source_jars",
    doc = "Returns the Jars containing Java source files for the target "
            + "and all of its transitive dependencies.",
    structField = true
  )
  public NestedSet<FileT> getTransitiveSourceJars();

  @SkylarkCallable(
      name = "transitive_exports",
      structField = true,
      doc = "Returns transitive set of labels that are being exported from this rule."
  )
  public NestedSet<Label> getTransitiveExports();

  /** Provider class for {@link JavaInfoApi} objects. */
  @SkylarkModule(name = "Provider", documented = false, doc = "")
  public interface JavaInfoProviderApi extends ProviderApi {

    @SkylarkCallable(
      name = "JavaInfo",
      doc = "The <code>JavaInfo</code> constructor.",
      parameters = {
        @Param(
            name = "output_jar",
            type = FileApi.class,
            named = true,
            doc =
                "The jar that was created as a result of a compilation "
                    + "(e.g. javac, scalac, etc)."),
        @Param(
            name = "compile_jar",
            type = FileApi.class,
            named = true,
            noneable = true,
            defaultValue = "None",
            doc =
                "A jar that is added as the compile-time dependency in lieu of "
                    + "<code>output_jar</code>. Typically this is the ijar produced by "
                    + "<code><a class=\"anchor\" href=\"java_common.html#run_ijar\">"
                    + "run_ijar</a></code>. "
                    + "If you cannot use ijar, consider instead using the output of "
                    + "<code><a class=\"anchor\" href=\"java_common.html#stamp_jar\">"
                    + "stamp_ijar</a></code>. If you do not wish to use either, "
                    + "you can simply pass <code>output_jar</code>."),
        @Param(
            name = "source_jar",
            type = FileApi.class,
            named = true,
            noneable = true,
            defaultValue = "None",
            doc =
                "The source jar that was used to create the output jar. "
                    + "Use <code><a class=\"anchor\" href=\"java_common.html#pack_sources\">"
                    + "pack_sources</a></code> to produce this source jar."),
        @Param(
            name = "neverlink",
            type = Boolean.class,
            named = true,
            defaultValue = "False",
            doc = "If true only use this library for compilation and not at runtime."),
        @Param(
            name = "deps",
            type = SkylarkList.class,
            generic1 = JavaInfoApi.class,
            named = true,
            defaultValue = "[]",
            doc = "Compile time dependencies that were used to create the output jar."),
        @Param(
            name = "runtime_deps",
            type = SkylarkList.class,
            generic1 = JavaInfoApi.class,
            named = true,
            defaultValue = "[]",
            doc = "Runtime dependencies that are needed for this library."),
        @Param(
            name = "exports",
            type = SkylarkList.class,
            generic1 = JavaInfoApi.class,
            named = true,
            defaultValue = "[]",
            doc =
                "Libraries to make available for users of this library. See also "
                    + "<a class=\"anchor\" href=\"https://docs.bazel.build/versions/"
                    + "master/be/java.html#java_library.exports\">java_library.exports</a>."),
        @Param(
            name = "actions",
            type = SkylarkActionFactoryApi.class,
            named = true,
            defaultValue = "None",
            noneable = true,
            doc =
                "Deprecated. No longer needed when <code>compile_jar</code> and/or "
                    + "<code>source_jar</code> are used. "
                    + "<p>Used to create the ijar and pack source files to jar actions.</p>"),
        @Param(
            name = "sources",
            type = SkylarkList.class,
            generic1 = FileApi.class,
            named = true,
            defaultValue = "None",
            noneable = true,
            doc =
                "Deprecated. Use <code>source_jar</code> instead. "
                    + "<p>The sources that were used to create the output jar.</p>"),
        @Param(
            name = "source_jars",
            type = SkylarkList.class,
            generic1 = FileApi.class,
            named = true,
            defaultValue = "None",
            noneable = true,
            doc =
                "Deprecated. Use <code>source_jar</code> instead. "
                    + "<p>The source jars that were used to create the output jar.</p>"),
        @Param(
            name = "use_ijar",
            type = Boolean.class,
            named = true,
            defaultValue = "None",
            noneable = true,
            doc =
                "Deprecated. Use <code>compile_jar</code> instead. "
                    + "<p>If an ijar of the output jar should be created and stored in the "
                    + "provider. </p>"),
        @Param(
            name = "java_toolchain",
            type = Object.class,
            named = true,
            defaultValue = "None",
            noneable = true,
            doc =
                "Deprecated. No longer needed when <code>compile_jar</code> and/or "
                    + "<code>source_jar</code> are used. "
                    + "<p>The toolchain to be used for retrieving the ijar tool and packing source "
                    + "files to Jar. This should be a Target.</p>"),
        @Param(
            name = "host_javabase",
            type = Object.class,
            named = true,
            defaultValue = "None",
            noneable = true,
            doc =
                "Deprecated. No longer needed when <code>compile_jar</code> and/or "
                    + "<code>source_jar</code> are used. "
                    + "<p>The host_javabase to be used for packing source files to Jar. "
                    + "This should be a Target.</p>"),
        @Param(
            name = "jdeps",
            type = FileApi.class,
            named = true,
            defaultValue = "None",
            noneable = true,
            doc = "jdeps information for the rule output (if available). This should be a "
                + "binary proto encoded using the deps.proto protobuf included with Bazel.  "
                + "If available this file is typically produced by a compiler. IDEs and other "
                + "tools can use this information for more efficient processing."),
      },
      selfCall = true,
      useLocation = true,
      useEnvironment = true)
    @SkylarkConstructor(objectType = JavaInfoApi.class, receiverNameForDoc = "JavaInfo")
    public JavaInfoApi<?> javaInfo(
        FileApi outputJarApi,
        Object compileJarApi,
        Object sourceJarApi,
        Boolean neverlink,
        SkylarkList<?> deps,
        SkylarkList<?> runtimeDeps,
        SkylarkList<?> exports,
        Object actionsApi,
        Object sourcesApi,
        Object sourceJarsApi,
        Object useIjarApi,
        Object javaToolchainApi,
        Object hostJavabaseApi,
        Object jdepsApi,
        Location loc,
        Environment env)
        throws EvalException;
  }
}