/**
 * Copyright 2024 Google LLC
 *
 * 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.
 */

import { Genkit } from './genkit.js';

export interface PluginProvider {
  name: string;
  initializer: () => void | Promise<void>;
}

type PluginInit = (genkit: Genkit) => void | Promise<void>;

export type GenkitPlugin = (genkit: Genkit) => PluginProvider;

/**
 * Defines a Genkit plugin.
 */
export function genkitPlugin<T extends PluginInit>(
  pluginName: string,
  initFn: T
): GenkitPlugin {
  return (genkit: Genkit) => ({
    name: pluginName,
    initializer: async () => {
      await initFn(genkit);
    },
  });
}