// Copyright 2020 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.docgen.annot;

import com.google.common.base.Ascii;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * An annotation applied to a class that indicates to docgen that the class's {@link
 * net.starlark.java.annot.StarlarkMethod}-annotated methods should be included in docgen's output
 * as standalone global functions.
 */
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface GlobalMethods {
  /** The environment in which the global methods in the annotated class are available. */
  enum Environment {
    ALL(
        "All Bazel files",
        "Methods available in all Bazel files, including .bzl files, BUILD, MODULE.bazel,"
            + " and WORKSPACE."),
    BZL(".bzl files", "Global methods available in all .bzl files."),
    BUILD(
        "BUILD files",
        "Methods available in BUILD files. See also the Build"
            + " Encyclopedia for extra <a href=\"${link functions}\">functions</a> and build rules,"
            + " which can also be used in BUILD files."),
    MODULE("MODULE.bazel files", "Methods available in MODULE.bazel files."),
    WORKSPACE("WORKSPACE files", "Methods available in WORKSPACE files.");

    private final String title;
    private final String description;

    Environment(String title, String description) {
      this.title = title;
      this.description = description;
    }

    public String getTitle() {
      return title;
    }

    public String getDescription() {
      return description;
    }

    public String getPath() {
      return Ascii.toLowerCase(name());
    }
  }

  Environment[] environment();
}