namespace Tmate
{
	[SingleInstance]
	// *INDENT-OFF*
	class Stdout : Object
	{
			public enum TokenType {
				SOCKET, ADDRESS, MATES, EMPTY,
				COMMENT, RESTART, INIT, TERM,
				UNRECOGNIZED, NET_ERROR;

				public string to_string() {
					return EnumClass.to_string(typeof(TokenType), this)
					.replace("TMATE_STDOUT_TOKEN_TYPE_", "Tmate.Stdout.TokenType.");
				}
			}

			public class Token
			{
					public TokenType @class {get; private set;}
					public string[]  tokens {get; private set;}
					public Token(string[] tokens, TokenType @class = UNRECOGNIZED)
					{
						this.class = @class;
						this.tokens = tokens;
					}
					public string to_string()
					{
						var sep = "";
						var end = "";

						if (this.tokens.length > 1) {
							sep += "\n\t";
							end += "\n";
						}
						if(this.tokens.length > 0) {
							sep += "\"";
							end += "\"";
						}
						return @"<$(this.class) {$sep$(
						       string.joinv(@"\", $sep", this.tokens)
						       )$(end.reverse())
						}>";
					}
			}

			private Regex r_connect = /^Connecting to (.+)\.\.\.$/;
			private Regex r_socket  = /^To connect.+ tmate -S (.+) attach$/;
			private Regex r_mates  = /^.+ (joined|left) \(([^()]+)\) -- (\d+) clients? .+$/;
			private Regex r_closed  = /^Session closed$/;
			private Regex r_restarted = /^Session shell restarted$/;
			private Regex r_comment = /^(Note: |Reconnecting)/;
			private Regex r_dnsfail = /^([^ ]+ lookup failure\.).+ \((.+)\)$/;
			private Regex r_netfail = /^(Error [^:]+)[:] [^:]+[:] (.+)$/;
			private Regex r_address = /^(ssh|web) \w+ ?(|read only)[:](?:|.+) ([^ ]+)$/;

			public Token parse(string line)
			{
				MatchInfo info;
				if(line == "")
					return new Token({}, EMPTY);
				else if(r_mates.match(line, 0, out info))
					return new Token({
					info.fetch(1), // joined | left
					info.fetch(2), // mate ip/domain
					info.fetch(3)  // active mates
				}, MATES);
				else if(r_dnsfail.match(line, 0, out info) || r_netfail.match(line, 0, out info))
					return new Token({
					info.fetch(1),
					info.fetch(2),
				}, NET_ERROR);
				else if(r_comment.match(line))
					return new Token({line}, COMMENT);
				else if(r_restarted.match(line))
					return new Token({}, RESTART);
				else if(r_address.match(line, 0, out info))
					return new Token({
					info.fetch(1), // web | ssh
					info.fetch(2), // read only?
					info.fetch(3)  // address
				}, ADDRESS);
				else if(r_socket.match(line, 0, out info))
					return new Token({ info.fetch(1) }, SOCKET);
				else if(r_closed.match(line))
					return new Token({}, TERM);
				else if(r_connect.match(line, 0, out info))
					return new Token({ info.fetch(1) }, INIT);
				return new Token({line});
			}
	}
}