/**
 * Copyright 2022 Google Inc. 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.
 */
import glob from 'glob';
import {nodeResolve} from '@rollup/plugin-node-resolve';
import commonjs from '@rollup/plugin-commonjs';
import copy from 'rollup-plugin-copy';
import {dirname, join, relative} from 'path';

export default ['cjs', 'esm'].flatMap(outputType => {
  const configs = [];
  // Note we don't use path.join here. We cannot since `glob` does not support
  // the backslash path separator.
  const sourcePath = `.wireit/third_party/${outputType}/`;
  for (const file of glob.sync(`${sourcePath}**/*.js`)) {
    const typesFile = `${file.slice(0, -3)}.d.ts`;
    configs.push({
      input: file,
      output: {
        file: join(
          'lib',
          outputType,
          'third_party',
          relative(sourcePath, file)
        ),
        format: outputType,
      },
      plugins: [
        commonjs(),
        nodeResolve(),
        copy({
          targets: [
            {
              src: typesFile,
              dest: dirname(
                join(
                  'lib',
                  outputType,
                  'third_party',
                  relative(sourcePath, typesFile)
                )
              ),
            },
          ],
        }),
      ],
    });
  }
  return configs;
});