#!/usr/bin/env node

var colors = require('colors'),
	cproc = require('child_process'),
	argv = require('minimist')(process.argv.slice(2)),
	fs = require('fs'),
	async = require('async');

var getRunningPid = function(callback) {
		fs.readFile(__dirname + '/pidfile', {
			encoding: 'utf-8'
		}, function(err, pid) {
			if (err) {
				return callback(err);
			}

			try {
				process.kill(parseInt(pid, 10), 0);
				callback(null, parseInt(pid, 10));
			} catch(e) {
				callback(e);
			}
		});
	};

function fork(args) {
	cproc.fork('app.js', args, {
		cwd: __dirname,
		silent: false
	});
}

switch(process.argv[2]) {
	case 'status':
		getRunningPid(function(err, pid) {
			if (!err) {
				process.stdout.write('\nNodeBB Running '.bold + '(pid '.cyan + pid.toString().cyan + ')\n'.cyan);
				process.stdout.write('\t"' + './nodebb stop'.yellow + '" to stop the NodeBB server\n');
				process.stdout.write('\t"' + './nodebb log'.yellow + '" to view server output\n');
				process.stdout.write('\t"' + './nodebb restart'.yellow + '" to restart NodeBB\n\n');
			} else {
				process.stdout.write('\nNodeBB is not running\n'.bold);
				process.stdout.write('\t"' + './nodebb start'.yellow + '" to launch the NodeBB server\n\n'.reset);
			}
		})
		break;

	case 'start':
		process.stdout.write('\nStarting NodeBB\n'.bold);
		process.stdout.write('  "' + './nodebb stop'.yellow + '" to stop the NodeBB server\n');
		process.stdout.write('  "' + './nodebb log'.yellow + '" to view server output\n');
		process.stdout.write('  "' + './nodebb restart'.yellow + '" to restart NodeBB\n\n'.reset);

		// Spawn a new NodeBB process
		cproc.fork(__dirname + '/loader.js', {
			env: process.env
		});
		break;

	case 'stop':
		getRunningPid(function(err, pid) {
			if (!err) {
				process.kill(pid, 'SIGTERM');
				process.stdout.write('Stopping NodeBB. Goodbye!\n')
			} else {
				process.stdout.write('NodeBB is already stopped.\n');
			}
		});
		break;

	case 'restart':
		getRunningPid(function(err, pid) {
			if (!err) {
				process.kill(pid, 'SIGHUP');
			} else {
				process.stdout.write('NodeBB could not be restarted, as a running instance could not be found.');
			}
		});
		break;

	case 'reload':
		getRunningPid(function(err, pid) {
			if (!err) {
				process.kill(pid, 'SIGUSR2');
			} else {
				process.stdout.write('NodeBB could not be reloaded, as a running instance could not be found.');
			}
		});
		break;

	case 'dev':
		process.env.NODE_ENV = 'development';
		cproc.fork(__dirname + '/loader.js', ['--no-daemon', '--no-silent'], {
			env: process.env
		});
		break;

	case 'log':
		process.stdout.write('\nType '.red + 'Ctrl-C '.bold + 'to exit'.red);
		process.stdout.write('\n\n'.reset);
		cproc.spawn('tail', ['-F', './logs/output.log'], {
			cwd: __dirname,
			stdio: 'inherit'
		});
		break;

	case 'setup':
		cproc.fork('app.js', ['--setup'], {
			cwd: __dirname,
			silent: false
		});
		break;

	case 'reset':
		var args = process.argv.slice(0);
		args.unshift('--reset');
		fork(args);
		break;

	case 'activate':
		var args = process.argv.slice(0);
		args.unshift('--activate');
		fork(args);
		break;

	case 'plugins':
		var args = process.argv.slice(0);
		args.unshift('--plugins');
		fork(args);
		break;

	case 'upgrade':
		async.series([
			function(next) {
				process.stdout.write('1. '.bold + 'Bringing base dependencies up to date... '.yellow);
				require('child_process').execFile('/usr/bin/env', ['npm', 'i', '--production'], next);
			},
			function(next) {
				process.stdout.write('OK\n'.green);
				process.stdout.write('2. '.bold + 'Updating NodeBB data store schema.\n'.yellow);
				var upgradeProc = cproc.fork('app.js', ['--upgrade'], {
					cwd: __dirname,
					silent: false
				});

				upgradeProc.on('close', next)
			}
		], function(err) {
			if (err) {
				process.stdout.write('\nError'.red + ': ' + err.message + '\n');
			} else {
				var message = 'NodeBB Upgrade Complete!';
				// some consoles will return undefined/zero columns, so just use 2 spaces in upgrade script if we can't get our column count
				var columns = process.stdout.columns;
				var spaces = columns ? new Array(Math.floor(columns / 2) - (message.length / 2) + 1).join(' ') : "  ";

				process.stdout.write('OK\n'.green);
				process.stdout.write('\n' + spaces + message.green.bold + '\n\n'.reset);
			}
		});
		break;

	default:
		process.stdout.write('\nWelcome to NodeBB\n\n'.bold);
		process.stdout.write('Usage: ./nodebb {start|stop|reload|restart|log|setup|reset|upgrade|dev}\n\n');
		process.stdout.write('\t' + 'start'.yellow + '\tStart the NodeBB server\n');
		process.stdout.write('\t' + 'stop'.yellow + '\tStops the NodeBB server\n');
		process.stdout.write('\t' + 'reload'.yellow + '\tRestarts NodeBB\n');
		process.stdout.write('\t' + 'restart'.yellow + '\tRestarts NodeBB\n');
		process.stdout.write('\t' + 'log'.yellow + '\tOpens the logging interface (useful for debugging)\n');
		process.stdout.write('\t' + 'setup'.yellow + '\tRuns the NodeBB setup script\n');
		process.stdout.write('\t' + 'reset'.yellow + '\tDisables all plugins, restores the default theme.\n');
		process.stdout.write('\t' + 'activate'.yellow + '\tActivate a plugin on start up.\n');
		process.stdout.write('\t' + 'plugins'.yellow + '\tList all plugins that have been installed.\n');
		process.stdout.write('\t' + 'upgrade'.yellow + '\tRun NodeBB upgrade scripts, ensure packages are up-to-date\n');
		process.stdout.write('\t' + 'dev'.yellow + '\tStart NodeBB in interactive development mode\n');
		process.stdout.write('\t' + 'watch'.yellow + '\tStart NodeBB in development mode and watch for changes\n');
		process.stdout.write('\n'.reset);
		break;
}