import os from './npm:@jspm/core@2/nodelibs/os';
import escapeStringRegexp from './npm:escape-string-regexp@5.0.0';

const extractPathRegex = /\s+at.*[(\s](.*)\)?/;
const pathRegex = /^(?:(?:(?:node|node:[\w/]+|(?:(?:node:)?internal\/[\w/]*|.*node_modules\/(?:babel-polyfill|pirates)\/.*)?\w+)(?:\.js)?:\d+:\d+)|native)/;
const homeDir = typeof os.homedir === 'undefined' ? '' : os.homedir().replace(/\\/g, '/');

function cleanStack(stack, {pretty = false, basePath} = {}) {
	const basePathRegex = basePath && new RegExp(`(at | \\()${escapeStringRegexp(basePath.replace(/\\/g, '/'))}`, 'g');

	if (typeof stack !== 'string') {
		return undefined;
	}

	return stack.replace(/\\/g, '/')
		.split('\n')
		.filter(line => {
			const pathMatches = line.match(extractPathRegex);
			if (pathMatches === null || !pathMatches[1]) {
				return true;
			}

			const match = pathMatches[1];

			// Electron
			if (
				match.includes('.app/Contents/Resources/electron.asar') ||
				match.includes('.app/Contents/Resources/default_app.asar')
			) {
				return false;
			}

			return !pathRegex.test(match);
		})
		.filter(line => line.trim() !== '')
		.map(line => {
			if (basePathRegex) {
				line = line.replace(basePathRegex, '$1');
			}

			if (pretty) {
				line = line.replace(extractPathRegex, (m, p1) => m.replace(p1, p1.replace(homeDir, '~')));
			}

			return line;
		})
		.join('\n');
}

export default cleanStack;

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