/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the Source EULA. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

import * as http from 'http';
import * as fs from 'fs';
import * as nls from 'vscode-nls';

const localize = nls.loadMessageBundle();

function fatal(err: any): void {
	console.error(localize('missOrInvalid', "Missing or invalid credentials."));
	console.error(err);
	process.exit(1);
}

function main(argv: string[]): void {
	if (argv.length !== 5) {
		return fatal('Wrong number of arguments');
	}

	if (!process.env['VSCODE_GIT_ASKPASS_HANDLE']) {
		return fatal('Missing handle');
	}

	if (!process.env['VSCODE_GIT_ASKPASS_PIPE']) {
		return fatal('Missing pipe');
	}

	if (process.env['VSCODE_GIT_COMMAND'] === 'fetch' && !!process.env['VSCODE_GIT_FETCH_SILENT']) {
		return fatal('Skip silent fetch commands');
	}

	const output = process.env['VSCODE_GIT_ASKPASS_PIPE'] as string;
	const socketPath = process.env['VSCODE_GIT_ASKPASS_HANDLE'] as string;
	const request = argv[2];
	const host = argv[4].substring(1, argv[4].length - 2);
	const opts: http.RequestOptions = {
		socketPath,
		path: '/',
		method: 'POST'
	};

	const req = http.request(opts, res => {
		if (res.statusCode !== 200) {
			return fatal(`Bad status code: ${res.statusCode}`);
		}

		const chunks: string[] = [];
		res.setEncoding('utf8');
		res.on('data', (d: string) => chunks.push(d));
		res.on('end', () => {
			const raw = chunks.join('');

			try {
				const result = JSON.parse(raw);
				fs.writeFileSync(output, result + '\n');
			} catch (err) {
				return fatal(`Error parsing response`);
			}

			setTimeout(() => process.exit(0), 0);
		});
	});

	req.on('error', () => fatal('Error in request'));
	req.write(JSON.stringify({ request, host }));
	req.end();
}

main(process.argv);