/**
 * @preserve A class to parse color values
 * @author Stoyan Stefanov <sstoo@gmail.com>
 * @link   http://www.phpied.com/rgb-color-parser-in-javascript/
 * @license Use it if you like it
 */
 
(function ( global ) {
 
	function RGBColor(color_string)
	{
		this.ok = false;

		// strip any leading #
		if (color_string.charAt(0) == '#') { // remove # if any
			color_string = color_string.substr(1,6);
		}

		color_string = color_string.replace(/ /g,'');
		color_string = color_string.toLowerCase();

		// before getting into regexps, try simple matches
		// and overwrite the input
		var simple_colors = {
			aliceblue: 'f0f8ff',
			antiquewhite: 'faebd7',
			aqua: '00ffff',
			aquamarine: '7fffd4',
			azure: 'f0ffff',
			beige: 'f5f5dc',
			bisque: 'ffe4c4',
			black: '000000',
			blanchedalmond: 'ffebcd',
			blue: '0000ff',
			blueviolet: '8a2be2',
			brown: 'a52a2a',
			burlywood: 'deb887',
			cadetblue: '5f9ea0',
			chartreuse: '7fff00',
			chocolate: 'd2691e',
			coral: 'ff7f50',
			cornflowerblue: '6495ed',
			cornsilk: 'fff8dc',
			crimson: 'dc143c',
			cyan: '00ffff',
			darkblue: '00008b',
			darkcyan: '008b8b',
			darkgoldenrod: 'b8860b',
			darkgray: 'a9a9a9',
			darkgreen: '006400',
			darkkhaki: 'bdb76b',
			darkmagenta: '8b008b',
			darkolivegreen: '556b2f',
			darkorange: 'ff8c00',
			darkorchid: '9932cc',
			darkred: '8b0000',
			darksalmon: 'e9967a',
			darkseagreen: '8fbc8f',
			darkslateblue: '483d8b',
			darkslategray: '2f4f4f',
			darkturquoise: '00ced1',
			darkviolet: '9400d3',
			deeppink: 'ff1493',
			deepskyblue: '00bfff',
			dimgray: '696969',
			dodgerblue: '1e90ff',
			feldspar: 'd19275',
			firebrick: 'b22222',
			floralwhite: 'fffaf0',
			forestgreen: '228b22',
			fuchsia: 'ff00ff',
			gainsboro: 'dcdcdc',
			ghostwhite: 'f8f8ff',
			gold: 'ffd700',
			goldenrod: 'daa520',
			gray: '808080',
			green: '008000',
			greenyellow: 'adff2f',
			honeydew: 'f0fff0',
			hotpink: 'ff69b4',
			indianred : 'cd5c5c',
			indigo : '4b0082',
			ivory: 'fffff0',
			khaki: 'f0e68c',
			lavender: 'e6e6fa',
			lavenderblush: 'fff0f5',
			lawngreen: '7cfc00',
			lemonchiffon: 'fffacd',
			lightblue: 'add8e6',
			lightcoral: 'f08080',
			lightcyan: 'e0ffff',
			lightgoldenrodyellow: 'fafad2',
			lightgrey: 'd3d3d3',
			lightgreen: '90ee90',
			lightpink: 'ffb6c1',
			lightsalmon: 'ffa07a',
			lightseagreen: '20b2aa',
			lightskyblue: '87cefa',
			lightslateblue: '8470ff',
			lightslategray: '778899',
			lightsteelblue: 'b0c4de',
			lightyellow: 'ffffe0',
			lime: '00ff00',
			limegreen: '32cd32',
			linen: 'faf0e6',
			magenta: 'ff00ff',
			maroon: '800000',
			mediumaquamarine: '66cdaa',
			mediumblue: '0000cd',
			mediumorchid: 'ba55d3',
			mediumpurple: '9370d8',
			mediumseagreen: '3cb371',
			mediumslateblue: '7b68ee',
			mediumspringgreen: '00fa9a',
			mediumturquoise: '48d1cc',
			mediumvioletred: 'c71585',
			midnightblue: '191970',
			mintcream: 'f5fffa',
			mistyrose: 'ffe4e1',
			moccasin: 'ffe4b5',
			navajowhite: 'ffdead',
			navy: '000080',
			oldlace: 'fdf5e6',
			olive: '808000',
			olivedrab: '6b8e23',
			orange: 'ffa500',
			orangered: 'ff4500',
			orchid: 'da70d6',
			palegoldenrod: 'eee8aa',
			palegreen: '98fb98',
			paleturquoise: 'afeeee',
			palevioletred: 'd87093',
			papayawhip: 'ffefd5',
			peachpuff: 'ffdab9',
			peru: 'cd853f',
			pink: 'ffc0cb',
			plum: 'dda0dd',
			powderblue: 'b0e0e6',
			purple: '800080',
			red: 'ff0000',
			rosybrown: 'bc8f8f',
			royalblue: '4169e1',
			saddlebrown: '8b4513',
			salmon: 'fa8072',
			sandybrown: 'f4a460',
			seagreen: '2e8b57',
			seashell: 'fff5ee',
			sienna: 'a0522d',
			silver: 'c0c0c0',
			skyblue: '87ceeb',
			slateblue: '6a5acd',
			slategray: '708090',
			snow: 'fffafa',
			springgreen: '00ff7f',
			steelblue: '4682b4',
			tan: 'd2b48c',
			teal: '008080',
			thistle: 'd8bfd8',
			tomato: 'ff6347',
			turquoise: '40e0d0',
			violet: 'ee82ee',
			violetred: 'd02090',
			wheat: 'f5deb3',
			white: 'ffffff',
			whitesmoke: 'f5f5f5',
			yellow: 'ffff00',
			yellowgreen: '9acd32'
		};
		for (var key in simple_colors) {
			if (color_string == key) {
				color_string = simple_colors[key];
			}
		}
		// emd of simple type-in colors

		// array of color definition objects
		var color_defs = [
			{
				re: /^rgb\((\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3})\)$/,
				example: ['rgb(123, 234, 45)', 'rgb(255,234,245)'],
				process: function (bits){
					return [
						parseInt(bits[1]),
						parseInt(bits[2]),
						parseInt(bits[3])
					];
				}
			},
			{
				re: /^(\w{2})(\w{2})(\w{2})$/,
				example: ['#00ff00', '336699'],
				process: function (bits){
					return [
						parseInt(bits[1], 16),
						parseInt(bits[2], 16),
						parseInt(bits[3], 16)
					];
				}
			},
			{
				re: /^(\w{1})(\w{1})(\w{1})$/,
				example: ['#fb0', 'f0f'],
				process: function (bits){
					return [
						parseInt(bits[1] + bits[1], 16),
						parseInt(bits[2] + bits[2], 16),
						parseInt(bits[3] + bits[3], 16)
					];
				}
			}
		];

		// search through the definitions to find a match
		for (var i = 0; i < color_defs.length; i++) {
			var re = color_defs[i].re;
			var processor = color_defs[i].process;
			var bits = re.exec(color_string);
			if (bits) {
				channels = processor(bits);
				this.r = channels[0];
				this.g = channels[1];
				this.b = channels[2];
				this.ok = true;
			}

		}

		// validate/cleanup values
		this.r = (this.r < 0 || isNaN(this.r)) ? 0 : ((this.r > 255) ? 255 : this.r);
		this.g = (this.g < 0 || isNaN(this.g)) ? 0 : ((this.g > 255) ? 255 : this.g);
		this.b = (this.b < 0 || isNaN(this.b)) ? 0 : ((this.b > 255) ? 255 : this.b);

		// some getters
		this.toRGB = function () {
			return 'rgb(' + this.r + ', ' + this.g + ', ' + this.b + ')';
		}
		this.toHex = function () {
			var r = this.r.toString(16);
			var g = this.g.toString(16);
			var b = this.b.toString(16);
			if (r.length == 1) r = '0' + r;
			if (g.length == 1) g = '0' + g;
			if (b.length == 1) b = '0' + b;
			return '#' + r + g + b;
		}

		// help
		this.getHelpXML = function () {

			var examples = new Array();
			// add regexps
			for (var i = 0; i < color_defs.length; i++) {
				var example = color_defs[i].example;
				for (var j = 0; j < example.length; j++) {
					examples[examples.length] = example[j];
				}
			}
			// add type-in colors
			for (var sc in simple_colors) {
				examples[examples.length] = sc;
			}

			var xml = document.createElement('ul');
			xml.setAttribute('id', 'rgbcolor-examples');
			for (var i = 0; i < examples.length; i++) {
				try {
					var list_item = document.createElement('li');
					var list_color = new RGBColor(examples[i]);
					var example_div = document.createElement('div');
					example_div.style.cssText =
							'margin: 3px; '
							+ 'border: 1px solid black; '
							+ 'background:' + list_color.toHex() + '; '
							+ 'color:' + list_color.toHex()
					;
					example_div.appendChild(document.createTextNode('test'));
					var list_item_value = document.createTextNode(
						' ' + examples[i] + ' -> ' + list_color.toRGB() + ' -> ' + list_color.toHex()
					);
					list_item.appendChild(example_div);
					list_item.appendChild(list_item_value);
					xml.appendChild(list_item);

				} catch(e){}
			}
			return xml;

		}

	}

    // export as AMD...
    if ( typeof define !== 'undefined' && define.amd ) {
        define( function () { return RGBColor; });
    }

    // ...or as browserify
    else if ( typeof module !== 'undefined' && module.exports ) {
        module.exports = RGBColor;
    }

    global.RGBColor = RGBColor;

}( typeof window !== 'undefined' ? window : this ));
