import vm from 'vm'
import fs from 'fs'
import path from 'path'
import spawn from 'cross-spawn'

const webpack_path = path.resolve(__dirname, '../node_modules/webpack-cli/bin/cli.js')
const test_dirs = fs.readdirSync(__dirname).filter(f => fs.lstatSync(path.join(__dirname, f)).isDirectory() && f !== 'common')
const nr_tests = test_dirs.length

const pad = (n: number) => ('' + n).padStart(('' + nr_tests).length, ' ')
const ok = (i: number, msg: string) => console.log(`\x1b[32mOK\x1b[0m   [${pad(i+1)}/${nr_tests}] ${msg}`)
const fail = (i: number, msg: string) => console.log(`\x1b[31mFAIL\x1b[0m [${pad(i+1)}/${nr_tests}] ${msg}`)

const sandbox = {
	console: {
		log: (str: string) => out.push(str + '\n')
	},
	process: {
		stdout: {
			write: (str: string) => out.push(str)
		},
		stderr: {
			write: (str: string) => out.push(str)
		}
	}
}

let out: string[] = []

for (const [i, _dir] of test_dirs.entries()) {
	const dir = path.join(__dirname, _dir)
	spawn.sync('node', [webpack_path], { cwd: dir })

	const out_js = fs.readFileSync(path.join(dir, 'dist/output.js'), 'utf8')
	const expected_out = fs.readFileSync(path.join(dir, 'expected_out.txt'), 'utf8')

	vm.runInNewContext(out_js, sandbox)
	const actual_out = out.join('')
	out = []

	if (actual_out === expected_out) {
		ok(i, _dir)
	} else {
		fail(i, _dir)
		console.log('')
		console.log('-------expected-------')
		console.log(expected_out)
		console.log('-------received-------')
		console.log(actual_out)
		console.log('----------------------')
		process.exit(1)
	}
}