import {Prototype} from '../common/reflect/Prototype';
import {MathUtil} from './MathUtil';

export class Color {

	public static ColorKeywords = {
		'aliceblue': 0xF0F8FF, 'antiquewhite': 0xFAEBD7, 'aqua': 0x00FFFF, 'aquamarine': 0x7FFFD4, 'azure': 0xF0FFFF,
		'beige': 0xF5F5DC, 'bisque': 0xFFE4C4, 'black': 0x000000, 'blanchedalmond': 0xFFEBCD, 'blue': 0x0000FF, 'blueviolet': 0x8A2BE2,
		'brown': 0xA52A2A, 'burlywood': 0xDEB887, 'cadetblue': 0x5F9EA0, 'chartreuse': 0x7FFF00, 'chocolate': 0xD2691E, 'coral': 0xFF7F50,
		'cornflowerblue': 0x6495ED, 'cornsilk': 0xFFF8DC, 'crimson': 0xDC143C, 'cyan': 0x00FFFF, 'darkblue': 0x00008B, 'darkcyan': 0x008B8B,
		'darkgoldenrod': 0xB8860B, 'darkgray': 0xA9A9A9, 'darkgreen': 0x006400, 'darkgrey': 0xA9A9A9, 'darkkhaki': 0xBDB76B, 'darkmagenta': 0x8B008B,
		'darkolivegreen': 0x556B2F, 'darkorange': 0xFF8C00, 'darkorchid': 0x9932CC, 'darkred': 0x8B0000, 'darksalmon': 0xE9967A, 'darkseagreen': 0x8FBC8F,
		'darkslateblue': 0x483D8B, 'darkslategray': 0x2F4F4F, 'darkslategrey': 0x2F4F4F, 'darkturquoise': 0x00CED1, 'darkviolet': 0x9400D3,
		'deeppink': 0xFF1493, 'deepskyblue': 0x00BFFF, 'dimgray': 0x696969, 'dimgrey': 0x696969, 'dodgerblue': 0x1E90FF, 'firebrick': 0xB22222,
		'floralwhite': 0xFFFAF0, 'forestgreen': 0x228B22, 'fuchsia': 0xFF00FF, 'gainsboro': 0xDCDCDC, 'ghostwhite': 0xF8F8FF, 'gold': 0xFFD700,
		'goldenrod': 0xDAA520, 'gray': 0x808080, 'green': 0x008000, 'greenyellow': 0xADFF2F, 'grey': 0x808080, 'honeydew': 0xF0FFF0, 'hotpink': 0xFF69B4,
		'indianred': 0xCD5C5C, 'indigo': 0x4B0082, 'ivory': 0xFFFFF0, 'khaki': 0xF0E68C, 'lavender': 0xE6E6FA, 'lavenderblush': 0xFFF0F5, 'lawngreen': 0x7CFC00,
		'lemonchiffon': 0xFFFACD, 'lightblue': 0xADD8E6, 'lightcoral': 0xF08080, 'lightcyan': 0xE0FFFF, 'lightgoldenrodyellow': 0xFAFAD2, 'lightgray': 0xD3D3D3,
		'lightgreen': 0x90EE90, 'lightgrey': 0xD3D3D3, 'lightpink': 0xFFB6C1, 'lightsalmon': 0xFFA07A, 'lightseagreen': 0x20B2AA, 'lightskyblue': 0x87CEFA,
		'lightslategray': 0x778899, 'lightslategrey': 0x778899, 'lightsteelblue': 0xB0C4DE, 'lightyellow': 0xFFFFE0, 'lime': 0x00FF00, 'limegreen': 0x32CD32,
		'linen': 0xFAF0E6, 'magenta': 0xFF00FF, 'maroon': 0x800000, 'mediumaquamarine': 0x66CDAA, 'mediumblue': 0x0000CD, 'mediumorchid': 0xBA55D3,
		'mediumpurple': 0x9370DB, 'mediumseagreen': 0x3CB371, 'mediumslateblue': 0x7B68EE, 'mediumspringgreen': 0x00FA9A, 'mediumturquoise': 0x48D1CC,
		'mediumvioletred': 0xC71585, 'midnightblue': 0x191970, 'mintcream': 0xF5FFFA, 'mistyrose': 0xFFE4E1, 'moccasin': 0xFFE4B5, 'navajowhite': 0xFFDEAD,
		'navy': 0x000080, 'oldlace': 0xFDF5E6, 'olive': 0x808000, 'olivedrab': 0x6B8E23, 'orange': 0xFFA500, 'orangered': 0xFF4500, 'orchid': 0xDA70D6,
		'palegoldenrod': 0xEEE8AA, 'palegreen': 0x98FB98, 'paleturquoise': 0xAFEEEE, 'palevioletred': 0xDB7093, 'papayawhip': 0xFFEFD5, 'peachpuff': 0xFFDAB9,
		'peru': 0xCD853F, 'pink': 0xFFC0CB, 'plum': 0xDDA0DD, 'powderblue': 0xB0E0E6, 'purple': 0x800080, 'red': 0xFF0000, 'rosybrown': 0xBC8F8F,
		'royalblue': 0x4169E1, 'saddlebrown': 0x8B4513, 'salmon': 0xFA8072, 'sandybrown': 0xF4A460, 'seagreen': 0x2E8B57, 'seashell': 0xFFF5EE,
		'sienna': 0xA0522D, 'silver': 0xC0C0C0, 'skyblue': 0x87CEEB, 'slateblue': 0x6A5ACD, 'slategray': 0x708090, 'slategrey': 0x708090, 'snow': 0xFFFAFA,
		'springgreen': 0x00FF7F, 'steelblue': 0x4682B4, 'tan': 0xD2B48C, 'teal': 0x008080, 'thistle': 0xD8BFD8, 'tomato': 0xFF6347, 'turquoise': 0x40E0D0,
		'violet': 0xEE82EE, 'wheat': 0xF5DEB3, 'white': 0xFFFFFF, 'whitesmoke': 0xF5F5F5, 'yellow': 0xFFFF00, 'yellowgreen': 0x9ACD32
	};

	public r = 1;
	public g = 1;
	public b = 1;

	public constructor(color1?: any, color2?: any, color3?: any) {
		if (arguments.length === 3) {
			return this.fromArray(arguments);
		}
		return this.set(color1);
	}

	public set(value) {
		if (value instanceof Color) {
			this.copy(value);
		} else if (typeof value === 'number') {
			this.setHex(value);
		} else if (typeof value === 'string') {
			this.setStyle(value);
		}
		return this;
	}

	public setScalar(scalar) {
		this.r = scalar;
		this.g = scalar;
		this.b = scalar;
	}

	public setHex(hex) {
		hex = Math.floor(hex);
		this.r = (hex >> 16 & 255) / 255;
		this.g = (hex >> 8 & 255) / 255;
		this.b = (hex & 255) / 255;
		return this;
	}

	public setRGB(r, g, b) {
		this.r = r;
		this.g = g;
		this.b = b;
		return this;
	}

	@Prototype()
	public setHSL(h?: any, s?: any, l?: any) {
		function hue2rgb(p, q, t) {
			if (t < 0) t += 1;
			if (t > 1) t -= 1;
			if (t < 1 / 6) return p + (q - p) * 6 * t;
			if (t < 1 / 2) return q;
			if (t < 2 / 3) return p + (q - p) * 6 * (2 / 3 - t);
			return p;
		}
		return function (h?: any, s?: any, l?: any) {
			h = MathUtil.euclideanModulo(h, 1);
			s = MathUtil.clamp(s, 0, 1);
			l = MathUtil.clamp(l, 0, 1);
			if (s === 0) {
				this.r = this.g = this.b = l;
			} else {
				var p = l <= 0.5 ? l * (1 + s) : l + s - (l * s);
				var q = (2 * l) - p;
				this.r = hue2rgb(q, p, h + 1 / 3);
				this.g = hue2rgb(q, p, h);
				this.b = hue2rgb(q, p, h - 1 / 3);
			}
			return this;
		};
	}

	public setStyle(style): any {
		function handleAlpha(string) {
			if (string === undefined) return;
			if (parseFloat(string) < 1) {
				console.warn('THREE.Color: Alpha component of ' + style + ' will be ignored.');
			}
		}
		var m;
		if (m = /^((?:rgb|hsl)a?)\(\s*([^\)]*)\)/.exec(style)) {
			// rgb / hsl
			var color;
			var name = m[1];
			var components = m[2];
			switch (name) {
				case 'rgb':
				case 'rgba':
					if (color = /^(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*(,\s*([0-9]*\.?[0-9]+)\s*)?$/.exec(components)) {
						// rgb(255,0,0) rgba(255,0,0,0.5)
						this.r = Math.min(255, parseInt(color[1], 10)) / 255;
						this.g = Math.min(255, parseInt(color[2], 10)) / 255;
						this.b = Math.min(255, parseInt(color[3], 10)) / 255;
						handleAlpha(color[5]);
						return this;
					}
					if (color = /^(\d+)\%\s*,\s*(\d+)\%\s*,\s*(\d+)\%\s*(,\s*([0-9]*\.?[0-9]+)\s*)?$/.exec(components)) {
						// rgb(100%,0%,0%) rgba(100%,0%,0%,0.5)
						this.r = Math.min(100, parseInt(color[1], 10)) / 100;
						this.g = Math.min(100, parseInt(color[2], 10)) / 100;
						this.b = Math.min(100, parseInt(color[3], 10)) / 100;
						handleAlpha(color[5]);
						return this;
					}
					break;
				case 'hsl':
				case 'hsla':
					if (color = /^([0-9]*\.?[0-9]+)\s*,\s*(\d+)\%\s*,\s*(\d+)\%\s*(,\s*([0-9]*\.?[0-9]+)\s*)?$/.exec(components)) {
						// hsl(120,50%,50%) hsla(120,50%,50%,0.5)
						var h = parseFloat(color[1]) / 360;
						var s = parseInt(color[2], 10) / 100;
						var l = parseInt(color[3], 10) / 100;
						handleAlpha(color[5]);
						return this.setHSL(h, s, l);
					}
					break;
			}
		} else if (m = /^\#([A-Fa-f0-9]+)$/.exec(style)) {
			// hex color
			var hex = m[1];
			var size = hex.length;
			if (size === 3) {
				// #ff0
				this.r = parseInt(hex.charAt(0) + hex.charAt(0), 16) / 255;
				this.g = parseInt(hex.charAt(1) + hex.charAt(1), 16) / 255;
				this.b = parseInt(hex.charAt(2) + hex.charAt(2), 16) / 255;
				return this;
			} else if (size === 6) {
				// #ff0000
				this.r = parseInt(hex.charAt(0) + hex.charAt(1), 16) / 255;
				this.g = parseInt(hex.charAt(2) + hex.charAt(3), 16) / 255;
				this.b = parseInt(hex.charAt(4) + hex.charAt(5), 16) / 255;
				return this;
			}
		}
		if (style && style.length > 0) {
			// color keywords
			var hex = Color.ColorKeywords[style];
			if (hex !== undefined) {
				// red
				this.setHex(hex);
			} else {
				// unknown color
				console.warn('THREE.Color: Unknown color ' + style);
			}
		}
		return this;
	}

	public clone() {
		return new (this as any).constructor(this.r, this.g, this.b);
	}

	public copy(color) {
		this.r = color.r;
		this.g = color.g;
		this.b = color.b;
		return this;
	}

	public copyGammaToLinear(color, gammaFactor) {
		if (gammaFactor === undefined) gammaFactor = 2.0;
		this.r = Math.pow(color.r, gammaFactor);
		this.g = Math.pow(color.g, gammaFactor);
		this.b = Math.pow(color.b, gammaFactor);
		return this;
	}

	public copyLinearToGamma(color, gammaFactor) {
		if (gammaFactor === undefined) gammaFactor = 2.0;
		var safeInverse = (gammaFactor > 0) ? (1.0 / gammaFactor) : 1.0;
		this.r = Math.pow(color.r, safeInverse);
		this.g = Math.pow(color.g, safeInverse);
		this.b = Math.pow(color.b, safeInverse);
		return this;
	}

	public convertGammaToLinear() {
		var r = this.r, g = this.g, b = this.b;
		this.r = r * r;
		this.g = g * g;
		this.b = b * b;
		return this;
	}

	public convertLinearToGamma() {
		this.r = Math.sqrt(this.r);
		this.g = Math.sqrt(this.g);
		this.b = Math.sqrt(this.b);
		return this;
	}

	public getHex() {
		return (this.r * 255) << 16 ^ (this.g * 255) << 8 ^ (this.b * 255) << 0;
	}

	public getHexString() {
		return ('000000' + this.getHex().toString(16)).slice(- 6);
	}

	public getHSL(optionalTarget?: any) {
		var hsl = optionalTarget || { h: 0, s: 0, l: 0 };
		var r = this.r, g = this.g, b = this.b;
		var max = Math.max(r, g, b);
		var min = Math.min(r, g, b);
		var hue, saturation;
		var lightness = (min + max) / 2.0;
		if (min === max) {
			hue = 0;
			saturation = 0;
		} else {
			var delta = max - min;
			saturation = lightness <= 0.5 ? delta / (max + min) : delta / (2 - max - min);
			switch (max) {
				case r: hue = (g - b) / delta + (g < b ? 6 : 0); break;
				case g: hue = (b - r) / delta + 2; break;
				case b: hue = (r - g) / delta + 4; break;
			}
			hue /= 6;
		}
		hsl.h = hue;
		hsl.s = saturation;
		hsl.l = lightness;
		return hsl;
	}

	public getStyle() {
		return 'rgb(' + ((this.r * 255) | 0) + ',' + ((this.g * 255) | 0) + ',' + ((this.b * 255) | 0) + ')';
	}

	public offsetHSL(h, s, l) {
		var hsl = this.getHSL();
		hsl.h += h; hsl.s += s; hsl.l += l;
		this.setHSL(hsl.h, hsl.s, hsl.l);
		return this;
	}

	public add(color) {
		this.r += color.r;
		this.g += color.g;
		this.b += color.b;
		return this;
	}

	public addColors(color1, color2) {
		this.r = color1.r + color2.r;
		this.g = color1.g + color2.g;
		this.b = color1.b + color2.b;
		return this;
	}

	public addScalar(s) {
		this.r += s;
		this.g += s;
		this.b += s;
		return this;
	}

	public multiply(color) {
		this.r *= color.r;
		this.g *= color.g;
		this.b *= color.b;
		return this;
	}

	public multiplyScalar(s) {
		this.r *= s;
		this.g *= s;
		this.b *= s;
		return this;
	}

	public lerp(color, alpha) {
		this.r += (color.r - this.r) * alpha;
		this.g += (color.g - this.g) * alpha;
		this.b += (color.b - this.b) * alpha;
		return this;
	}

	public equals(c) {
		return (c.r === this.r) && (c.g === this.g) && (c.b === this.b);
	}

	public fromArray(array, offset?: any) {
		if (offset === undefined) offset = 0;
		this.r = array[offset];
		this.g = array[offset + 1];
		this.b = array[offset + 2];
		return this;
	}

	public toArray(array, offset) {
		if (array === undefined) array = [];
		if (offset === undefined) offset = 0;
		array[offset] = this.r;
		array[offset + 1] = this.g;
		array[offset + 2] = this.b;
		return array;
	}


	public static getRandomHexColor() {
		var letters = '0123456789ABCDEF'.split('');
		var color = '';
		for (var i = 0; i < 6; i++) {
			color += letters[Math.floor(Math.random() * 16)];
		}

		return parseInt(color, 16);
	}
}