/*
 * Copyright 2020 Spotify AB
 *
 * 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 fs from 'fs-extra';
import path from 'path';
import { fileURLToPath } from 'url';
import { InputError } from '@backstage/backend-common';
import { PreparerBase, PreparerOptions } from './types';

export class FilePreparer implements PreparerBase {
  async prepare({ url, workspacePath }: PreparerOptions) {
    if (!url.startsWith('file:///')) {
      throw new InputError(`Wrong location protocol, should be 'file', ${url}`);
    }

    const checkoutDir = path.join(workspacePath, 'checkout');
    await fs.ensureDir(checkoutDir);

    const templatePath = fileURLToPath(url);

    await fs.copy(templatePath, checkoutDir, {
      recursive: true,
    });
  }
}
