/*
    This script shows how to use a nifty js color function that I've found here:
    // http://www.codingforums.com/showthread.php?t=11156
    
    This function converts HSL to RGB values.
    Why use HSL?
    It is much easier to create harmonic colors. 
    */
main();
function main() {
	/*
    
     This is white: R: 255 G: 255 B: 255
    
    var hue        =   0;
    var saturation =   0;
    var lightness  = 100;
    
    var rgb = color_hsl2rgb(hue, saturation, lightness);
    
    alert("R: " + rgb.r + " G: "+ rgb.g + " B: " + rgb.b);
    
     */

	var pw = 200; // For easier handling...
	var ph = 200; // For easier handling...
	var gutter = 23; // The margins till the page bounds:

	// Create a document:
	var doc = app.documents.add({
		facingPages: false,
		documentPreferences: {
			pageWidth: pw,
			pageHeight: ph,
		},
	});

	var radius = pw / 2 - gutter; // The radius of our circle:

	var page = doc.pages[0]; // Get the first page:

	page.marginPreferences.properties = {
		/* set some properties */ top: gutter,
		left: gutter,
		right: gutter,
		bottom: gutter,
	};

	var origin = [pw / 2, ph / 2]; // The origin of the graphic line:

	// Now lets loop over a circle:
	for (var degrees = 0; degrees < 360; degrees++) {
		/*
		 * Now comes some wired Math stuff
		 * To get this right we have to transform the degrees
		 * into radians. Than we can calculate the outer point with Math.sin and Math.cos.
		 */
		var radians_angle = ((degrees / 360) % 360) * 2 * Math.PI; // Turn the degrees into radians:

		var x = origin[0] + radius * Math.cos(radians_angle); // Calc the outer x.
		var y = origin[1] + radius * Math.sin(radians_angle); // Calc the outer y.

		/*
		 *  Lets create a color for every line.
		 *  We use the degrees of the circle to get the hue of color.
		 *  Saturation and lightness are fixed values in this example.
		 */
		var temp_hue = degrees; // The hue of the color.
		var temp_saturation = 100; // The saturation of the color.
		var temp_lightness = 70; // The lightness of the color.
		/*
		 *  The conversion function returns an object that looks like this:
		 *  { "r": value, "g": value, "b": value }
		 */
		var temp_rgb = color_hsl2rgb(temp_hue, temp_saturation, temp_lightness);

		var color = doc.colors.add(); // Add a color every iteration.
		color.properties = {
			/* Set some props... */ name: "color " + degrees,
			model: ColorModel.PROCESS,
			space: ColorSpace.RGB,
			colorValue: [temp_rgb.r, temp_rgb.g, temp_rgb.b],
		};

		// colors_convertToCMYK(color); // If you use this function by Dave Saunders you get CMYK colors.

		var gl = page.graphicLines.add({
			/* Add a graphicLine every iteration... */ endCap: EndCap.ROUND_END_CAP,
			strokeColor: color,
			/* leftLineEnd  : ArrowHead.CIRCLE_ARROW_HEAD, */
			rightLineEnd: ArrowHead.CIRCLE_SOLID_ARROW_HEAD,
		});

		gl.paths[0].pathPoints[0].anchor = origin; // Set the first point of the gl.
		gl.paths[0].pathPoints[1].anchor = [x, y]; // Set the second point of the gl.
	} // End of loop degrees.
} // End of main function.

//   DESCRIPTION: Convert RGB to rounded CMYK.

/*
        ©Copyright Dave Saunders.
        This function converts RGB colors
        to CMYK, rounding the values to the nearest whole number.
        Found here: http://indesignsecrets.com/rgb-to-cmyk-0.php
    */

function colors_convertToCMYK(color) {
	color.space = ColorSpace.cmyk;
	var vals = color.colorValue;
	for (var j = vals.length - 1; j >= 0; j--) {
		vals[j] = Math.round(vals[j]);
	}
	color.colorValue = vals;
}

/* ------------------------------------------------------------------------------------------------ */
// Color conversion found here:
// http://www.codingforums.com/showthread.php?t=11156
// This is deep stuff...just use it!
function color_hsl2rgb(h, s, l) {
	var m1, m2, hue;
	var r, g, b;
	s /= 100;
	l /= 100;
	if (s == 0) {
		r = g = b = l * 255;
	} else {
		if (l <= 0.5) {
			m2 = l * (s + 1);
		} else {
			m2 = l + s - l * s;
		}
		m1 = l * 2 - m2;
		hue = h / 360;
		r = color_HueToRgb(m1, m2, hue + 1 / 3);
		g = color_HueToRgb(m1, m2, hue);
		b = color_HueToRgb(m1, m2, hue - 1 / 3);
	}
	return { r: r, g: g, b: b };
}

function color_HueToRgb(m1, m2, hue) {
	var v;
	if (hue < 0) {
		hue += 1;
	} else if (hue > 1) {
		hue -= 1;
	}

	if (6 * hue < 1) {
		v = m1 + (m2 - m1) * hue * 6;
	} else if (2 * hue < 1) {
		v = m2;
	} else if (3 * hue < 2) {
		v = m1 + (m2 - m1) * (2 / 3 - hue) * 6;
	} else {
		v = m1;
	}

	return 255 * v;
}
/* ------------------------------------------------------------------------------------------------ */