/*
 * This script generates an index file for each asset folder specified in `assetFolders`.
 * The index file will export all assets in the folder as an object.
 *
 * Usage:
 *   1. Add the names of your asset folders to the `assetFolders` array.
 *   2. Run `pnpm assets gen` to generate the index files.
 *
 * The generated index files will have the name `index.ts` and will be located in the root of each asset folder.
 */
import fs from 'fs';
import { dirname, join } from 'path';
import prettier from 'prettier';
import { fileURLToPath } from 'url';

const assetFolders = ['icons', 'images'];

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);

assetFolders.forEach((folder) => {
	const indexFilePath = join(__dirname, '..', folder, 'index.ts');
	const assetsFolderPath = join(__dirname, '..', folder);

	// Delete the index file if it already exists.
	if (fs.existsSync(indexFilePath)) {
		fs.unlinkSync(indexFilePath);
	}

	const fileNames = fs.readdirSync(assetsFolderPath);

	// Generate the import statements for each asset.
	const assetImports = fileNames
		.filter((fileName) => fileName !== 'index.ts')
		.map((fileName) => {
			const variableName = fileName.split('.')[0].replace(/-/g, '');
			return `import ${variableName} from './${fileName}';`;
		})
		.join('\n');

	// Generate the export statements for each asset.
	const assetExports = fileNames
		.filter((fileName) => fileName !== 'index.ts')
		.map((fileName) => {
			const variableName = fileName.split('.')[0].replace(/-/g, '');
			return `${variableName},`;
		})
		.join('\n');

	// Generate the index file content.
	const indexFileContent = `
	/*
	* This file was automatically generated by a script.
	* To regenerate this file, run: pnpm assets gen
	*/
		
${assetImports}\n\nexport {\n  ${assetExports}\n};\n`;

	// Write the index file.
	prettier.resolveConfig(join(__dirname, '..', '..', '..', '.prettierrc.js')).then((options) => {
		fs.writeFileSync(
			indexFilePath,
			prettier.format(indexFileContent, { ...options, parser: 'typescript' })
		);
	});
});