var FRAME_VIEWDATA					= (1<<2);

var VIEWDATA_LEFT					= ascii(0x08);
var VIEWDATA_RIGHT					= ascii(0x09);
var VIEWDATA_DOWN					= ascii(0x0a);
var VIEWDATA_UP						= ascii(0x0b);
var VIEWDATA_CLS					= ascii(0x0c);
var VIEWDATA_CR						= ascii(0x0d);
var VIEWDATA_CON					= ascii(0x11);
var VIEWDATA_COFF					= ascii(0x14);
var VIEWDATA_HOME					= ascii(0x1e);
var VIEWDATA_MOSIAC_RED				= ascii(27)+ascii(0x51);
var VIEWDATA_MOSIAC_GREEN			= ascii(27)+ascii(0x52);
var VIEWDATA_MOSIAC_YELLOW			= ascii(27)+ascii(0x53);
var VIEWDATA_MOSIAC_BLUE			= ascii(27)+ascii(0x54);
var VIEWDATA_MOSIAC_MAGENTA			= ascii(27)+ascii(0x55);
var VIEWDATA_MOSIAC_CYAN			= ascii(27)+ascii(0x56);
var VIEWDATA_MOSIAC_WHITE			= ascii(27)+ascii(0x57);

load('ansitex/load/frame-page.js');

// Our frame object
function FrameViewdata() {
	PageFrame.apply(this,arguments);

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

	/* Length of a frame */
	this.settings.FRAME_LENGTH			= 22;
	/* Width of a frame */
	this.settings.FRAME_WIDTH			= 40;
	/* Size of page owner (length) */
	this.settings.FRAME_HEADER			= 23;
	/* Size of page number (length with a-z) */
	this.settings.FRAME_PAGENUM			= 11;
	/* Size of cost	(length without unit) */
	this.settings.FRAME_COST				= 3;

	this.settings.MSG_SENDORNOT			= ascii(27)+'BKEY 1 TO SEND, 2 NOT TO SEND';
	this.settings.MSG_LOGON				= ascii(27)+'BKEY 1 TO LOGON, 2 TO RETURN';
	this.settings.MSG_SENT				= ascii(27)+'BMESSAGE SENT - KEY _ TO CONTINUE';
	this.settings.MSG_NOTSENT			= ascii(27)+'BMESSAGE NOT SENT - KEY _ TO CONTINUE';
	this.settings.ERR_NO_PARENT			= ascii(27)+'APARENT FRAME DOESNT EXIST';
	this.settings.ERR_NOT_IMPLEMENTED	= ascii(27)+'ANOT IMPLEMENTED YET?';
	this.settings.ERR_ROUTE				= ascii(27)+'GMISTAKE?'+ascii(27)+'BTRY AGAIN OR TELL US ON *08';
	this.settings.ERR_METHOD_NOT_EXIST	= ascii(27)+'GMISTAKE?'+ascii(27)+'BTRY AGAIN OR TELL US ON *08';
	this.settings.ACCESS_DENIED			= ascii(27)+'AACCESS DENIED.';
	this.settings.ALREADY_MEMBER		= ascii(27)+'AALREADY MEMBER OF CUG'
	this.settings.INACTIVITY			= ascii(27)+'AINACTIVITY ALERT, DISCONNECT PENDING...';
	this.settings.INACTIVE				= ascii(27)+'AINACTIVITY DISCONNECT';
	this.settings.NOACTION				= ascii(27)+'ANO ACTION PERFORMED';
	this.settings.BASESTAR				= ascii(27)+'B*';
	this.settings.INVALID_CODE			= ascii(27)+'AINVAID CODE, PLEASE TRY AGAIN *00';
	this.settings.TOKEN_EMAIL			= ascii(27)+'ATOKEN EMAILED TO YOU...';
	this.settings.TOKEN_SENT			= ascii(27)+'ATOKEN SENT, PLEASE ENTER TOKEN';
	this.settings.INVALID_EMAIL			= ascii(27)+'AINVAID EMAIL, PLEASE TRY AGAIN *00';
	this.settings.INVALID_UID			= ascii(27)+'AINVAID USER ID, PLEASE TRY AGAIN *00';
	this.settings.CANNOT_SEND_TOKEN		= ascii(27)+'ACANNOT SEND VALIDATION CODE, PLEASE TRY AGAIN *00';
	this.settings.USER_EXISTS			= ascii(27)+'AERROR USER EXISTS, PLEASE TRY AGAIN *00';
	this.settings.USER_CREATE_ERROR		= ascii(27)+'AERROR CREATING USER, PLEASE TRY AGAIN *00';
	this.settings.LOGIN_ERROR			= ascii(27)+'AERROR LOGGING IN, PLEASE TRY AGAIN *00';
	this.settings.CANCEL_MSG			= ascii(27)+'BPRESS 2 TO CANCEL';
	this.settings.SYS_ERROR				= ascii(27)+'ASYS ERR, TRY AGAIN OR TELL US ON *08';
	this.settings.LOADING				= VIEWDATA_MOSIAC_WHITE+'loading...';

	var blp=0;							// Length of data on the bottom line

	/**
	 * Set the attribute at the current position
	 */
	this.attr=function(field) {
		//NOOP
	}

	/**
	 * Turn off the cursor
	 */
	this.cursorOff=function() {
		write_raw(VIEWDATA_COFF);
		this.gotoxy(1,1);
	}

	this.cursorOn=function(x,y) {
		write_raw(VIEWDATA_CON);
		this.gotoxy(x,y);
	}

	// Field backspace, that leaves the field filler char
	this.fieldbs=function(char) {
		console.write(VIEWDATA_LEFT+char+VIEWDATA_LEFT);
	}

	this.gotoxy=function(x,y) {
		// @todo This could be optimised to go the shortest route
		write_raw(VIEWDATA_HOME);
		if (x>0)
			write_raw(VIEWDATA_RIGHT.repeat(x));
		if (y>0)
			write_raw(VIEWDATA_DOWN.repeat(y));
	}

	this.strlen=function(str) {
		return str.replace(/\x1b/g,'').length;
	};

	// Render the frame to the user
	this.render=function(withHeader) {
		log(LOG_DEBUG,'- VIEWDATA FRAME');
		owner = base64_decode(this.owner);

		header = VIEWDATA_DOWN;

		//log(LOG_DEBUG,'  - FRAME User: ['+JSON.stringify(user)+']');

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

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

			header = videotex(this.pageownerlogo)+' '.repeat(this.settings.FRAME_HEADER-this.strlen(videotex(this.pageownerlogo)))+
				(this.isAccessible ? ascii(27)+'G' : ascii(27)+'A')+this.page+' '.repeat(this.settings.FRAME_PAGENUM-this.page.length)+
				ascii(27)+'B'+' '.repeat(this.settings.FRAME_COST-cost.toString().length+1)+cost;
		}

		//console.status |= CON_RAW_IN;
		write_raw(VIEWDATA_CLS);
		write_raw(header);
		return write_raw(videotex(base64_decode(this.content)));
	};

	this.qrcode = function(qr) {
		// Render the body
		var qrcode = VIEWDATA_HOME+VIEWDATA_DOWN.repeat(5);
		var offset = this.settings.FRAME_WIDTH-Math.ceil(qr.size/2)-1;

		for (var x = -1; x < qr.size; x=x+3) {
			var line = VIEWDATA_RIGHT.repeat(offset ? offset-1 : 0)+VIEWDATA_MOSIAC_WHITE;

			for (var y = -1; y < qr.size; y=y+2) {
				var char = 0;

				//TL
				char |= ((x===-1) || (y===-1) || ! qr.getModule(x,y)) ? (1<<0) : (0<<0);
				//TR
				char |= ((x===-1) || (y === qr.size-1) || ! qr.getModule(x,y+1)) ? (1<<1) : (0<<1);
				//ML
				char |= ((y===-1) || ! qr.getModule(x+1,y)) ? (1<<2) : (0<<2);
				//MR
				char |= ((y === qr.size-1) || ! qr.getModule(x+1,y+1)) ? (1<<3) : (0<<3);
				//BL
				char |= ((x===qr.size-2) || (y===-1) || ! qr.getModule(x+2,y)) ? (1<<4) : (0<<4);
				//BR
				char |= ((x===qr.size-2) || (y === qr.size-1) || ! qr.getModule(x+2,y+1)) ? (1<<5) : (0<<5);

				char += 0x20;
				if (char > 0x3f)
					char += 0x20;

				line += ascii(char);
			}

			// Render the right column
			if (y%2)
				line += ascii(0x35);

			repeat_count = this.settings.FRAME_WIDTH-Math.ceil(qr.size/2)-offset-(offset ? 1 : 2)-(y%2 === 1 ? 0 : 1);

			qrcode += line+' '.repeat(repeat_count > 0 ? repeat_count : 0);

			// To fix some terminals where moving right from col 40 doesnt advance to col 1 on the next line
			qrcode +=VIEWDATA_LEFT+VIEWDATA_CR+VIEWDATA_DOWN;
		}

		log(LOG_DEBUG,'WIDTH:'+this.settings.FRAME_WIDTH);
		log(LOG_DEBUG,'QR   :'+(Math.ceil(qr.size/2)+1));
		log(LOG_DEBUG,'OFF  :'+offset);
		log(LOG_DEBUG,'Y    :'+(y%2 ? 0 : 1));
		log(LOG_DEBUG,'X    :'+(x%3 ? 0 : 1));

		// Render the bottom
		if (x%3) {
			line = VIEWDATA_RIGHT.repeat(offset ? offset-1 : 0)+VIEWDATA_MOSIAC_WHITE;

			for (var y = 0; y < qr.size; y=y+2) {
				line += ascii(0x23);
			}

			// Render the right column
			if (y%2 === 0) {
				line += ascii(0x21);
			}

			qrcode += line+' '.repeat(repeat_count > 0 ? repeat_count : 0);
		}

		write_raw(qrcode);
	};

	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');
	}

	/**
	 * Send a message to the baseline.
	 *
	 * @param text
	 * @param reposition
	 */
	this.sendBaseline=function(text,reposition) {
		var msg = this.getMessage(text);
		var x = this.strlen(msg);

		write_raw(VIEWDATA_HOME+VIEWDATA_UP+msg+
			((blp > x)
			? (' '.repeat(blp-x)+(reposition ? VIEWDATA_HOME+VIEWDATA_UP+VIEWDATA_RIGHT.repeat(x) : ''))
			: '')
		);

		blp = x;
	}

	this.clearBaseline=function(reposition) {
		msg = '';

		write_raw(VIEWDATA_HOME+VIEWDATA_UP+msg+
			((blp > msg.length)
				? (' '.repeat(blp-msg.length)+(reposition ? VIEWDATA_HOME+VIEWDATA_UP+VIEWDATA_RIGHT.repeat(msg.length) : ''))
				: '')
		);

		blp = msg.length;
	}
}

function videotex(data) {
	var output = '';
	//$output .= ($byte < 32) ? ESC.chr($byte+64) : chr($byte);
	for (var i = 0; i < data.length; i++) {
		output += (data.charCodeAt(i) < 32) ? "\x1b"+String.fromCharCode(data.charCodeAt(i)+64) : String.fromCharCode(data.charCodeAt(i));
	}
	return output;
}

FrameViewdata.prototype = PageFrame.prototype;
FrameViewdata.prototype.constructor = FrameViewdata;