function pathFilename(path) {
	var match = /\/([^\/]+)$/.exec(path);
	if (match) {
		return match[1];
	}
}

function getRandomInt(min, max) {
	// via https://developer.mozilla.org/en/Core_JavaScript_1.5_Reference/Global_Objects/Math/random#Examples
	return Math.floor(Math.random() * (max - min + 1)) + min;
}

function randomChoice(items) {
	return items[getRandomInt(0, items.length-1)];
}


TerminalShell.commands['sudo'] = function(terminal) {
	var cmd_args = Array.prototype.slice.call(arguments);
	cmd_args.shift(); // terminal
	if (cmd_args.join(' ') == 'make me a sandwich') {
		terminal.print('Okay.');
	} else if (cmd_args.join(' ') == 'su'){ 
		terminal.config.prompt = 'root@ryanj.us/#';
	} else {
		var cmd_name = cmd_args.shift();
		cmd_args.unshift(terminal);
		cmd_args.push('sudo');
		if (TerminalShell.commands.hasOwnProperty(cmd_name)) {
			this.sudo = true;
			this.commands[cmd_name].apply(this, cmd_args);
			delete this.sudo;
		} else if (!cmd_name) {
			terminal.print('sudo what?');
		} else {
			terminal.print('sudo: '+cmd_name+': command not found');
		}
	}
};

TerminalShell.filters.push(function (terminal, cmd) {
	if (/!!/.test(cmd)) {
		var newCommand = cmd.replace('!!', this.lastCommand);
		terminal.print(newCommand);
		return newCommand;
	} else {
		return cmd;
	}
});

TerminalShell.commands['shutdown'] = TerminalShell.commands['poweroff'] = function(terminal) {
	if (this.sudo) {
		terminal.print('Broadcast message from guest@ryanj');
		terminal.print();
		terminal.print('The system is going down for maintenance NOW!');
		return $('#screen').fadeOut();
	} else {
		terminal.print('Must be root.');
	}
};

TerminalShell.commands['logout'] =
TerminalShell.commands['exit'] = 
TerminalShell.commands['quit'] = function(terminal) {
	terminal.print('Bye.');
	$('#prompt, #cursor').hide();
	terminal.promptActive = false;
};

TerminalShell.commands['restart'] = TerminalShell.commands['reboot'] = function(terminal) {
	if (this.sudo) {
		TerminalShell.commands['poweroff'](terminal).queue(function(next) {
			window.location.reload();
		});
	} else {
		terminal.print('Must be root.');
	}
};

function linkFile(url) {
	return {type:'dir', enter:function() {
		window.location = url;
	}};
}

Filesystem = {
	'welcome.txt': {type:'file', read:function(terminal) {
		terminal.print($('<h4>').text('Welcome to ryans site .'));
		terminal.print('It works something like a *nix shell if you have javascript enabled.');
		terminal.print('Good luck!');
	}},
	'license.txt': {type:'file', read:function(terminal) {
		terminal.print($('<p>').html('whowants to read a license???</a>'));
		terminal.print($('<p>').html(''));
		terminal.print();
		$.each([
			'This program is free software; you can redistribute it and/or',
			'modify it under the terms of the GNU General Public License',
			'as published by the Free Software Foundation; either version 2',
			'of the License, or (at your option) any later version.',
			'',
			'This program is distributed in the hope that it will be useful,',
			'but WITHOUT ANY WARRANTY; without even the implied warranty of',
			'MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the',
			'GNU General Public License for more details.',
			'',
			'You should have received a copy of the GNU General Public License',
			'along with this program; if not, write to the Free Software',
			'Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.'
		], function(num, line) {
			terminal.print(line);
		});
	}}
};
Filesystem['blog'] = linkFile('http://www.urcorp.net');
Filesystem['docs'] = linkFile('#');
TerminalShell.pwd = Filesystem;

TerminalShell.commands['cd'] = function(terminal, path) {
	if (path in this.pwd) {
		if (this.pwd[path].type == 'dir') {
			this.pwd[path].enter(terminal);
		} else if (this.pwd[path].type == 'file') {
			terminal.print('cd: '+path+': Not a directory');
		}
	} else {
		terminal.print('cd: '+path+': No such file or directory');
	}
};

TerminalShell.commands['dir'] =
TerminalShell.commands['ls'] = function(terminal, path) {
	var name_list = $('<ul>');
	$.each(this.pwd, function(name, obj) {
		if (obj.type == 'dir') {
			name += '/';
		}
		name_list.append($('<li>').text(name));
	});
	terminal.print(name_list);
};

TerminalShell.commands['cat'] = function(terminal, path) {
	if (path in this.pwd) {
		if (this.pwd[path].type == 'file') {
			this.pwd[path].read(terminal);
		} else if (this.pwd[path].type == 'dir') {
			terminal.print('cat: '+path+': Is a directory');
		}
	} else {
		terminal.print('You\'re a kitty!');
	}
};

TerminalShell.commands['rm'] = function(terminal, flags, path) {
	if (flags && flags[0] != '-') {
		path = flags;
	}
	if (!path) {
		terminal.print('rm: missing operand');
	} else if (path in this.pwd) {
		if (this.pwd[path].type == 'file') {
			delete this.pwd[path];
		} else if (this.pwd[path].type == 'dir') {
			if (/r/.test(flags)) {
				delete this.pwd[path];
			} else {
				terminal.print('rm: cannot remove '+path+': Is a directory');
			}
		}
	} else if (flags == '-rf' && path == '/') {
		if (this.sudo) {
			TerminalShell.commands = {};
		} else {
			terminal.print('rm: cannot remove /: Permission denied');
		}
	}
};


TerminalShell.commands['irc'] =
TerminalShell.commands['write'] =
TerminalShell.commands['irssi'] = function(terminal, nick) {
	if (nick) {
		$('.irc').slideUp('fast', function() {
			$(this).remove();
		});
		var url = "##";
		if (nick) {
			url += "&nick=" + encodeURIComponent(nick);
		}
		TerminalShell.commands['curl'](terminal, url).addClass('irc');
	} else {
		terminal.print('usage: irc <NAmE>');
	}
};


TerminalShell.commands['apt-get'] = TerminalShell.commands['aptitude'] = function(terminal, subcmd) {
	if (!this.sudo && (subcmd in {'update':true, 'upgrade':true, 'dist-upgrade':true})) {
		terminal.print('E: Unable to lock the administration directory, are you root?');
	} else {
		if (subcmd == 'update') {
			terminal.print('Reading package lists... Done');
		} else if (subcmd == 'upgrade') {
			if (($.browser.name == 'msie') || ($.browser.name == 'firefox' && $.browser.versionX < 3)) {
				terminal.print($('<p>').append($('<a>').attr('href', 'http://abetterbrowser.org/').text('To complete installation, click here.')));
			} else {
				terminal.print('This looks pretty good to me.');
			}
		} else if (subcmd == 'dist-upgrade') {
			var longNames = {'win':'Windows', 'mac':'OS X', 'linux':'Linux'};
			var name = $.os.name;
			if (name in longNames) {
				name = longNames[name];
			} else {
				name = 'something fancy';
			}
			terminal.print('You are already running '+name+'.');
		} else if (subcmd == 'moo') {
			terminal.print('        (__)');
			terminal.print('        (oo)');
			terminal.print('  /------\\/ ');
			terminal.print(' / |    ||  ');
			terminal.print('*  /\\---/\\  ');
			terminal.print('   ~~   ~~  '); 
			terminal.print('...."Have you mooed today?"...');
		} else if (!subcmd) {
			terminal.print('This APT has Super Cow Powers.');
		} else {
			terminal.print('E: Invalid operation '+subcmd);
		}
	}
};

function oneLiner(terminal, msg, msgmap) {
	if (msgmap.hasOwnProperty(msg)) {
		terminal.print(msgmap[msg]);
		return true;
	} else {
		return false;
	}
}

TerminalShell.commands['man'] = function(terminal, what) {
	pages = {
		'last': 'Man, last night was AWESOME.',
		'help': 'Man, help me out here.',
		'next': 'Request confirmed; you will be reincarnated as a man next.',
		'cat':  'You are now riding a half-man half-cat.'
	};
	if (!oneLiner(terminal, what, pages)) {
		terminal.print('Oh, I\'m sure you can figure it out.');
	}
};

TerminalShell.commands['locate'] = function(terminal, what) {
	keywords = {
		'ninja': 'Ninja can not be found!',
		'keys': 'Have you checked your coat pocket?',
		'joke': 'Joke found on user.',
		'problem': 'Problem exists between keyboard and chair.',
		'raptor': 'BEHIND YOU!!!'
	};
	if (!oneLiner(terminal, what, keywords)) {
		terminal.print('Locate what?');
	}
};



TerminalShell.commands['sleep'] = function(terminal, duration) {
	duration = Number(duration);
	if (!duration) {
		duration = 5;
	}
	terminal.setWorking(true);
	terminal.print("You take a nap.");
	$('#screen').fadeOut(1000);
	window.setTimeout(function() {
		terminal.setWorking(false);
		$('#screen').fadeIn();
		terminal.print("You awake refreshed.");
	}, 1000*duration);
};

// No peeking!
TerminalShell.commands['help'] = TerminalShell.commands['halp'] = function(terminal) {
	terminal.print('That would be cheating!  But we\'re not even done yet so try back later!');
}; 

TerminalShell.fallback = function(terminal, cmd) {
	oneliners = {
		'make me a sandwich': 'What? Make it yourself.',
		'make love': 'I put on my robe and wizard hat.',
		'i read the source code': '<3',
		'pwd': 'You are in a maze of twisty passages, all alike.',
		'lpr': 'PC LOAD LETTER',
		'hello joshua': 'How about a nice game of Global Thermonuclear War?',
		'xyzzy': 'Nothing happens.',
		'date': 'November 69th',
		'hello': 'Why hello there!',
		'who': 'Doctor Who?',
		'ryan': 'Yes?',
		'whoareyou': 'I am your father....',
		'ryanj': 'what!?',
		'urcorp': '... server are up ...',
		'treat': 'you need to pass firewall my cmd...',
		'firewall': 'sorry... but you might want to brushup on your skills...',
		'cmd': 'hmm... your in command line.. you must be from alabama...',
		'hacker': 'shhhh... the po po be watching',
		'su': 'God mode activated. Remember, with great power comes great ... aw, screw it, go have fun.',
		'fuck': 'I have a headache.',
		'whoami': 'You are not important',
		'nano': 'Seriously? Why don\'t you just use Notepad.exe? Or MS Paint?',
		'top': 'It\'s up there --^',
		'moo':'moo',
		'ping': 'There is another submarine three miles ahead, bearing 225, forty fathoms down.',
		'find': 'What do you want to find? Kitten would be nice.',
		'hello':'Hello.','more':'Oh, yes! More! More!',
		'your gay': 'Keep your hands off it!',
		'hi':'Hi.','echo': 'Echo ... echo ... echo ...',
		'bash': 'You bash your head against the wall. It\'s not very effective.','ssh': 'ssh, this is a library.',
		'uname': 'Illudium Q-36 Explosive Space Modulator',
		'finger': 'Mmmmmm...',
		'kill': 'Terminator deployed to 1984.',
		'use the force luke': 'I believe you mean source.',
		'use the source luke': 'I\'m not luke, you\'re luke!',
		'serenity': 'You can\'t take the sky from me.',
		'enable time travel': 'TARDIS error: Time Lord missing.',
		'ed': 'You are not a diety.'
	};
	oneliners['emacs'] = 'You should really use vim.';
	oneliners['vi'] = oneliners['vim'] = 'You should really use emacs.';
	
	cmd = cmd.toLowerCase();
	if (!oneLiner(terminal, cmd, oneliners)) {
		if (cmd == "asl" || cmd == "a/s/l") {
			terminal.print(randomChoice([
				'2/AMD64/Server Rack',
				'24/I/in your computer',
				'328/M/Transylvania',
				'6/M/Battle School',
				'48/M/The White House',
				'7/F/Rapture',
				'Exactly your age/A gender you\'re attracted to/Far far away.',
				'7,831/F/Lothl贸rien',
				'42/M/FBI Field Office'
			]));
		} else if  (cmd == "hint") {
			terminal.print(randomChoice([
 				'We offer some really nice polos.',
 				$('<p>').html('This terminal will remain available at <a href="http://ryanj.us/">http://ryanj.us/</a>'),
 				'Use the source, Luke!',
 				'There are cheat codes.'
 			]));
		} else if (cmd == 'find kitten') {
			terminal.print($('<iframe width="800" height="600" src="http://www.robotfindskitten.net/rfk.swf"></iframe>'));
		} else if (cmd == 'buy stuff') {
			Filesystem['store'].enter();
		} else if (cmd == 'time travel') {
			cmdlineDisplay(terminal, 630);
		} else if (/:\(\)\s*{\s*:\s*\|\s*:\s*&\s*}\s*;\s*:/.test(cmd)) {
			Terminal.setWorking(true);
		} else {
			$.get("/cmdline/missing", {cmd: cmd});
			return false;
		}
	}
	return true;
};

$(document).ready(function() {
	Terminal.promptActive = true;
	function noData() {
		Terminal.print($('<p>').addClass('error').text('Unable to load startup data. :-('));
		Terminal.promptActive = true;
	}
	$('#screen').bind('cli-load', function(e){});
});