import assert from 'assert';
import * as fs from 'fs';
import * as path from 'path';
import { rollup } from 'rollup';
import { svelte } from '../helpers.js';

describe( 'js', () => {
	fs.readdirSync( 'test/js/samples' ).forEach( dir => {
		if ( dir[0] === '.' ) return;

		// add .solo to a sample directory name to only run that test
		const solo = /\.solo/.test( dir );

		if ( solo && process.env.CI ) {
			throw new Error( 'Forgot to remove `solo: true` from test' );
		}

		( solo ? it.only : it )( dir, () => {
			dir = path.resolve( 'test/js/samples', dir );
			const input = fs.readFileSync( `${dir}/input.html`, 'utf-8' ).replace( /\s+$/, '' );

			let actual;

			try {
				actual = svelte.compile( input, {
					shared: true
				}).code;
			} catch ( err ) {
				console.log( err.frame );
				throw err;
			}

			fs.writeFileSync( `${dir}/_actual.js`, actual );
			const expected = fs.readFileSync( `${dir}/expected.js`, 'utf-8' );
			const expectedBundle = fs.readFileSync( `${dir}/expected-bundle.js`, 'utf-8' );

			return rollup({
				entry: `${dir}/_actual.js`,
				plugins: [{
					resolveId ( importee, importer ) {
						if ( !importer ) return importee;
						if ( importee === 'svelte/shared.js' ) return path.resolve('shared.js');
						return null;
					}
				}]
			}).then(bundle => {
				const actualBundle = bundle.generate({ format: 'es' }).code;
				fs.writeFileSync( `${dir}/_actual-bundle.js`, actualBundle );

				assert.equal(
					actual.trim().replace( /^\s+$/gm, '' ),
					expected.trim().replace( /^\s+$/gm, '' )
				);

				assert.equal(
					actualBundle.trim().replace( /^\s+$/gm, '' ),
					expectedBundle.trim().replace( /^\s+$/gm, '' )
				);
			});
		});
	});
});