var SESSION_ANSITEX					= (1<<1);
var SESSION_EXT						= 'tex';

var ANSI_FRAME_WIDTH				= 80;
var ANSI_FRAME_HEIGHT				= 22;
var ANSI_FRAME_PROVIDER_LENGTH		= 55;
var ANSI_FRAME_PAGE_LENGTH			= 13;
var ANSI_FRAME_COST_LENGTH			= 10;

/**
 * This function converts ANSI text into an array of attributes
 *
 * We include the attribute for every character, so that if a window is placed on top of this window, the edges
 * render correctly.
 *
 * @param contents	- Our ANSI content to convert
 * @param width		- The width before wrapping to the next line
 * @param yoffset   - fields offset as discovered
 * @param xoffset   - fields offset as discovered
 * @param debug		- Enable debug mode
 */
function anstoattrs(contents,width,yoffset,xoffset,debug) {
	if (debug)
		writeln('DEBUG active: '+debug);

	lines = (''+contents).split(/\r\n/);

	var i = 0;
	var bg = BG_BLACK;
	var fg = LIGHTGRAY;
	var attr = fg + bg + i;

	var y = 0;
	// Saving cursor positions
	var saved = {};

	var frame = {
		content: [],
		dynamic_fields: [],
		input_fields: [],
	};

	// @todo temp hack, rework ansi variable - perhaps have a function that converts an attribute back into an ANSI sequence
	var ansi = { i: 0, f: 37, b: 40 };

	while (lines.length > 0) {
		var x = 0;
		var line = lines.shift();

		if ((debug !== undefined) && (y > debug)) {
			exit(1);
		}

		if (debug) {
			log(LOG_DEBUG,'y:'+y);
			log(LOG_DEBUG,'line:'+line);
		}

		while (line.length > 0) {
			/* parse an attribute sequence*/
			var m = line.match(/^\x1b\[((\d+)(;?(\d+))*)+m/);
			if (m !== null) {
				line = line.substr(m.shift().length);
				m = m.shift().split(';').sort(function(a,b) { return Number(a) < Number(b) ? -1 : 1; });

				if ((debug !== undefined) && debug === y) {
					//writeln();
					log(LOG_DEBUG,'m:'+JSON.stringify(m));
				}

				// Reset
				if (Number(m[0]) === 0) {
					bg = BG_BLACK;
					fg = LIGHTGRAY;
					i = 0;
					ansi = { i:0, b:37, f:40};
					m.shift();

					if (debug)
						log(LOG_DEBUG,' - RESET');
				}

				// High Intensity
				if (Number(m[0]) === 1) {
					i += (((i === 0) || (i === BLINK)) ? HIGH : 0);
					m.shift();
					ansi.i = 1;

					if (debug && (debug === y))
						writeln('fg:'+fg+', bg:'+bg+' i:'+i);
				}

				// Blink
				if (Number(m[0]) === 5) {
					i += (((i === 0) || (i === HIGH)) ? BLINK : 0);
					m.shift();
				}

				// Foreground
				if ((Number(m[0]) >= 30) && (Number(m[0]) <= 37)) {
					ansi.f = Number(m[0]);

					switch(Number(m.shift())) {
						case 30:
							fg = BLACK;
							break;

						case 31:
							fg = RED;
							break;

						case 32:
							fg = GREEN;
							break;

						case 33:
							fg = BROWN;
							break;

						case 34:
							fg = BLUE;
							break;

						case 35:
							fg = MAGENTA;
							break;

						case 36:
							fg = CYAN;
							break;

						case 37:
							fg = LIGHTGRAY;
							break;
					}
				}

				// Background
				if ((Number(m[0]) >= 40) && (Number(m[0]) <= 47)) {
					ansi.b = Number(m[0]);

					switch (Number(m.shift())) {
						case 40:
							bg = BG_BLACK;
							break;

						case 41:
							bg = BG_RED;
							break;

						case 42:
							bg = BG_GREEN;
							break;

						case 43:
							bg = BG_BROWN;
							break;

						case 44:
							bg = BG_BLUE;
							break;

						case 45:
							bg = BG_MAGENTA;
							break;

						case 46:
							bg = BG_CYAN;
							break;

						case 47:
							bg = BG_LIGHTGRAY;
							break;
					}
				}

				if (debug) {
					log(LOG_DEBUG,'fg:'+fg+', bg:'+bg+' i:'+i);
					log(LOG_DEBUG,'ansi:'+JSON.stringify(ansi));
				}

				attr = bg + fg + i;
				continue;
			}

			if (debug)
				log(LOG_DEBUG,'= Current attr:'+attr);

			/* parse absolute character position */
			var m = line.match(/^\x1b\[(\d*);?(\d*)[Hf]/);
			if (m !== null) {
				line = line.substr(m.shift().length);

				if (m.length === 0) {
					x = 0;
					y = 0;

				} else {
					if(m[0])
						y = Number(m.shift())-1;

					if(m[0])
						x = Number(m.shift())-1;
				}

				continue;
			}

			/* ignore a bullshit sequence */
			var n = line.match(/^\x1b\[\?7h/);
			if (n !== null) {
				line = line.substr(n.shift().length);
				continue;
			}

			/* parse an up positional sequence */
			var n = line.match(/^\x1b\[(\d*)A/);
			if (n !== null) {
				line = line.substr(n.shift().length);

				var chars = n.shift();

				y -= (chars < 1) ? 0 : Number(chars);

				continue;
			}

			/* parse a down positional sequence */
			var n = line.match(/^\x1b\[(\d*)B/);
			if (n !== null) {
				line = line.substr(n.shift().length);

				var chars = n.shift();

				y += (chars < 1) ? 0 : Number(chars);

				continue;
			}

			/* parse a forward positional sequence */
			var n = line.match(/^\x1b\[(\d*)C/);
			if (n !== null) {
				line = line.substr(n.shift().length);

				var chars = n.shift();

				x += (chars < 1) ? 0 : Number(chars);

				continue;
			}

			/* parse a backward positional sequence */
			var n = line.match(/^\x1b\[(\d*)D/);
			if (n !== null) {
				line = line.substr(n.shift().length);

				var chars = n.shift()

				x -= (chars < 1) ? 0 : Number(chars);

				continue;
			}

			/* parse a clear screen sequence */
			var n = line.match(/^\x1b\[2J/);
			if (n !== null) {
				line = line.substr(n.shift().length);

				continue;
			}

			/* parse save cursor sequence */
			var n = line.match(/^\x1b\[s/);
			if (n !== null) {
				line = line.substr(n.shift().length);
				saved.x = x;
				saved.y = y;

				continue;
			}

			/* parse restore cursor sequence */
			var n = line.match(/^\x1b\[u/);
			if (n !== null) {
				line = line.substr(n.shift().length);
				x = saved.x;
				y = saved.y;

				continue;
			}

			/* parse an input field */
			// Input field 'FIELD;valueTYPE;input char'
			// @todo remove the trailing ESC \ to end the field, just use a control code ^B \x02 (Start of Text) and ^C \x03
			var m = line.match(/^\x1b_(([A-Z]+;[0-9a-z]+)([;]?.+)?)\x1b\\/);
			if (m !== null) {
				log(LOG_DEBUG,'Got input field: '+JSON.stringify(m));
				log(LOG_DEBUG,'ansi:'+JSON.stringify(ansi));
				// full string that matched
				match = m.shift();

				// thus, the rest of the line
				line = line.substr(match.length);
				//writeln('rest of line:'+JSON.stringify(line));

				// We are interested in our field match
				var sos = m.shift().split(';');
				//writeln('sos:'+JSON.stringify(sos));

				for (var num in sos) {
					switch (num) {
						// First value is the field name
						case '0':
							field = sos[num];
							break;

						// Second value is the length/type of the field, nnX nn=size in chars, T=type (lower case)
						case '1':
							var c = sos[num].match(/([0-9]+)([a-z])/);
							if (! c) {
								log(LOG_ERROR,'SOS FAILED PARSING FIELD LENGTH/TYPE. ['+r+'x'+c+'] '+sos[num]);
								break;
							}

							//log(LOG_DEBUG,'SOS ['+r+'x'+c+'] NUM CHARS: '+x[1]+', TYPE: '+x[2]);
							fieldlen = c[1];
							fieldtype = c[2];
							break;

						// Third field is the char to to use
						case '2':
							fieldchar = sos[num];
							break;

						default:
							log(LOG_ERROR,'IGNORING ADDITIONAL SOS FIELDS. ['+r+'x'+c+'] '+sos[num]);
					}
				}

				// If we are padding our field with a char, we need to add that back to line
				// @todo validate if this goes beyond our width (and if scrolling not enabled)
				if (fieldlen)
					line = fieldchar.repeat(fieldlen)+line;

				frame.input_fields.push({
					type: fieldtype,
					length: Number(fieldlen),
					char: fieldchar,
					name: field,
					attribute: JSON.parse(JSON.stringify(ansi)),
					x: Number(x+(xoffset !== undefined ? xoffset : 0)),
					y: Number(y+(yoffset !== undefined ? yoffset : 0)),
					value: '',
				});

				log(LOG_DEBUG,'input_field:'+JSON.stringify(frame.input_fields.last));
			}

			/* parse dynamic value field */
			// @todo remove the trailing ESC \ to end the field, just use a control code ie: ^E \x05 (Enquiry) or ^Z \x26 (Substitute)
			var m = line.match(/^\x1bX(([a-zA-Z._:^;]+[0-9]?;-?[0-9^;]+)([;]?[^;]+)?)\x1b\\/);
			if (m !== null) {
				// full string that matched
				match = m.shift();

				// thus, the rest of the line
				line = line.substr(match.length);
				//writeln('rest of line:'+JSON.stringify(line));

				// We are interested in our field match
				var df = m.shift().split(';');

				log(LOG_DEBUG,'- DF found at ['+x+'x'+y+'], Field: '+df[0]+', Length: '+df[1]+', Pad:'+df[2]);
				// If we are padding our field with a char, we need to add that back to line
				// @todo validate if this goes beyond our width (and if scrolling not enabled)
				line = (df[2] ? df[2] : '_').repeat(Math.abs(df[1]))+line;

				frame.dynamic_fields.push({
					name: df[0],
					length: df[1],
					pad: df[2],
					x: x+(xoffset !== undefined ? xoffset : 0),
					y: y+(yoffset !== undefined ? yoffset : 0),
					value: undefined,
				});
			}

			/* set character and attribute */
			var ch = line[0];
			line = line.substr(1);

			if (debug && debug === y) {
				log(LOG_DEBUG,'Got char: '+ch);
				//write(ch);
			}

			/* validate position */
			if (y < 0)
				y = 0;
			if (x < 0)
				x = 0;

			if (x >= width) {
				x = 0;
				y++;
			}

			/* set character and attribute */
			if (! frame.content[y+1])
				frame.content[y+1]=[];

			if (attr === null)
				throw new Error('Attribute is null?');

			frame.content[y+1][x+1] = new Char(ch,attr);

			x++;
		}

		// If we got a BG_BLACK|LIGHTGRAY ESC [0m, but not character, we include it as it resets any background that was going on
		if ((attr === BG_BLACK|LIGHTGRAY) && frame.content[y+1] && (frame.content[y+1][x].__properties__.attr !== attr))
			frame.content[y+1][x+1] = new Char(undefined,attr);

		y++;
	}

	return frame;
}

load('ansitex/load/session.js');

// Our frame object
function SessionAnsitex() {
	Session.apply(this,arguments);

	/* File Extension used for frames */
	this.settings.ext = 'tex';

	/* Length of a frame */
	this.settings.FRAME_LENGTH			= 22;
	/* Width of a frame */
	this.settings.FRAME_WIDTH			= 80;
	/* Size of page owner (length) */
	this.settings.FRAME_HEADER			= 56;
	/* Size of page number (length with a-z) */
	this.settings.FRAME_PAGENUM			= 12;
	/* Size of cost	(length without unit) */
	this.settings.FRAME_COST				= 9;

	this.settings.MSG_SENDORNOT			= '\1n\1h\1GKEY 1 TO SEND, 2 NOT TO SEND';
	this.settings.MSG_LOGON				= '\1n\1h\1GKEY 1 TO LOGON, 2 TO RETURN';
	this.settings.MSG_SENT				= '\1n\1h\1GMESSAGE SENT - KEY # TO CONTINUE';
	this.settings.MSG_NOTSENT			= '\1n\1h\1GMESSAGE NOT SENT - KEY # TO CONTINUE';
	this.settings.ERR_NO_PARENT			= '\1n\1h\1RPARENT FRAME DOESNT EXIST';
	this.settings.ERR_NOT_IMPLEMENTED	= '\1n\1h\1RNOT IMPLEMENTED YET?';
	this.settings.ERR_ROUTE				= '\1n\1h\1WMISTAKE? \1GTRY AGAIN OR TELL US ON *08';
	this.settings.ERR_METHOD_NOT_EXIST	= '\1n\1h\1WMISTAKE? \1GTRY AGAIN OR TELL US ON *08';
	this.settings.ACCESS_DENIED			= '\1n\1h\1RACCESS DENIED. MISTAKE? TRY AGAIN OR TELL US *08';
	this.settings.ALREADY_MEMBER		= '\1n\1h\1RALREADY MEMBER OF CUG'
	this.settings.INACTIVITY			= '\1n\1h\1RINACTIVITY ALERT, DISCONNECT PENDING...';
	this.settings.INACTIVE				= '\1n\1h\1RINACTIVITY DISCONNECT';
	this.settings.NOACTION				= '\1n\1h\1RNO ACTION PERFORMED';
	this.settings.BASESTAR				= '\1N\1G\1H*';
	this.settings.INVALID_CODE			= '\1n\1h\1RINVAID CODE, PLEASE TRY AGAIN *00';
	this.settings.TOKEN_EMAIL			= '\1n\1h\1RTOKEN EMAILED TO YOU...';
	this.settings.TOKEN_SENT			= '\1n\1h\1RTOKEN SENT, PLEASE ENTER TOKEN';
	this.settings.INVALID_EMAIL			= '\1n\1h\1RINVAID EMAIL, PLEASE TRY AGAIN *00';
	this.settings.INVALID_UID			= '\1n\1h\1RINVAID USER ID, PLEASE TRY AGAIN *00';
	this.settings.CANNOT_SEND_TOKEN		= '\1n\1h\1RCANNOT SEND VALIDATION CODE, PLEASE TRY AGAIN *00';
	this.settings.USER_EXISTS			= '\1n\1h\1RERROR USER EXISTS, PLEASE TRY AGAIN *00';
	this.settings.USER_CREATE_ERROR		= '\1n\1h\1RERROR CREATING USER, PLEASE TRY AGAIN *00';
	this.settings.LOGIN_ERROR			= '\1n\1h\1RERROR LOGGING IN, PLEASE TRY AGAIN *00';
	this.settings.CANCEL_MSG			= '\1n\1h\1GPRESS 2 TO CANCEL';
	this.settings.SYS_ERROR				= '\1n\1h\1RSYSTEM ERROR DETECTED - TRY AGAIN OR TELL US *08';
	this.settings.LOADING				= '\1n\1h\1Kloading...';
	this.settings.PROCESSING			= '\1n\1h\1Kprocessing...';

	/**
	 * Set the attribute at the current position
	 */
	this.attr = function(field) {
		write('\x1b['+field.i+';'+field.f+';'+field.b+'m');
	}

	this.baselineClear = function(reposition) {
		this.cursorSave();
		this.gotoxy(0,24);
		this.cleareol();

		if (! reposition)
			this.cursorRestore();
	}

	/**
	 * Send a message to the baseline.
	 *
	 * @param text
	 * @param reposition
	 */
	this.baselineSend = function(text,reposition) {
		this.cursorSave();
		this.gotoxy(0,24);
		write(this.getMessage(text));
		this.cleareol();

		if (! reposition)
			this.cursorRestore();
	}

	/**
	 * Turn off the cursor
	 */
	this.cursorOff = function() {
		write('\x1b[?25l');
		write('\x1b[24;0H');
	}

	/**
	 * Turn on cursor
	 * @param x
	 * @param y
	 */
	this.cursorOn = function(x,y) {
		write('\x1b[?25h');

		if (x && y)
			this.gotoxy(x,y);
	}

	this.cursorRestore = function() {
		write('\x1b[u');
	}

	this.cursorSave = function() {
		write('\x1b[s');
	}

	this.cleareol = function() {
		write('\x1b[0K');
	}

	// Field backspace, that leaves the field filler char
	this.fieldbs = function(char) {
		write('\x1b[D'+char+'\x1b[D');
	}

	/**
	 * Position the cursor in a specific location
	 *
	 * @param x
	 * @param y
	 */
	this.gotoxy = function(x,y) {
		write('\x1b['+y+';'+x+'H');
	}

	/*
	// Render the frame to the user
	this.render=function(context,withoutHeader) {
		log(LOG_DEBUG,'- ANSI FRAME');
		owner = base64_decode(this.owner);

		const frame = new Frame(1,1,this.settings.FRAME_WIDTH,this.settings.FRAME_LENGTH+2,LIGHTGRAY);
		frame.open();

		// Dont show the page number on system login page
		if ((! withoutHeader) && (user.number || (this.type !== FRAME_TYPE_LOGIN && NO_HISTORY_FRAMES.indexOf(this.page) === -1))) {
			log(LOG_DEBUG,'  - Owner: ['+this.pageowner+']');

			cost = (this.isAccessible ? this.cost+FRAME_COSTUNIT : ' -');

			header = '\1n'+this.pageownerlogo+' '.repeat(this.settings.FRAME_HEADER-console.strlen(this.pageownerlogo))+'\1n '+
				(this.isAccessible ? '\1W' : '\1R')+'\1H'+this.page+' '.repeat(this.settings.FRAME_PAGENUM-this.page.length)+' '+
				'\1G\1H'+' '.repeat(this.settings.FRAME_COST-cost.toString().length+1)+cost+'\1n'+
				(console.screen_columns > 80 ? '\n\r' : '');

			frame.putmsg(header);
		}

		contentgraphic = new Graphic(this.settings.FRAME_WIDTH);
		contentgraphic.auto_extend = true;
		contentgraphic.atcodes = false;
		contentgraphic.ANSI = this.parse(base64_decode(this.content),context);

		var contentframe = new Frame(1,2,this.settings.FRAME_WIDTH,this.settings.FRAME_LENGTH,LIGHTGRAY,frame);
		contentframe.open();
		contentframe.lf_strict = false;
		contentframe.atcodes = false;
		contentframe.word_wrap = false

		contentframe.putmsg(contentgraphic.MSG)
		contentframe.scrollTo(0,0);

		frame.cycle();

		return contentframe;
	};
	*/

	this.qrcode=function(qr,subframe) {
		// SMALL Image
		var full = ascii(0xdb);
		var top = ascii(0xdf);
		var bot = ascii(0xdc);
		var blank = ' ';

		var qrcode = '';

		/*
		// Render the top line
		var line = ascii(27)+'[1;37m'+bot;
		for (var y = 0; y < qr.size; y++) {
			line += bot;
		}
		qrcode += line+bot+bot+ascii(27)+'[0m'+"\r\n";
		*/

		// Render the body
		for (var x = -1; x < qr.size; x=x+2) {
			line = ascii(27)+'[1;37m'+full;

			for (var y = 0; y < qr.size; y++) {
				// Top is white
				if (! ((x===-1)? 0 : qr.getModule(x, y))) {
					line += (qr.getModule(x+1, y)) ? top : full;

				// Top is black
				} else {
					line += (qr.getModule(x+1, y)) ? blank : bot;
				}
			}

			qrcode += line+full+ascii(27)+'[0m'+"\r\n";
		}

		// Render the bottom
		line = ascii(27)+'[1;37m'+top;
		for (var y = 0; y < qr.size; y++) {
			line += top;
		}
		qrcode += line+top+ascii(27)+'[0m'+"\r\n";

		ans2bin(fo.parse(qrcode),subframe);
		subframe.open();
		subframe.cycle();
	};

	/*
	this.save=function() {
		file = system.mods_dir+'ansitex/text/'+this.page+'.tex';
		w = new File(file);
		if (! w.open('w')) {
			log(LOG_ERROR,'! ERROR: Unable to create TEX file for '+this.page);
			exit(1);
		}

		w.write(JSON.stringify(this));
		w.close();

		log(LOG_DEBUG,'Saved file: '+this.page+'.tex');
	}
	*/
}

SessionAnsitex.prototype = Session.prototype;
SessionAnsitex.prototype.constructor = SessionAnsitex;