let Utils = new Object();

Utils.lightOrDark = function (color) {

    // Variables for red, green, blue values
    var r, g, b, hsp;

    // Check the format of the color, HEX or RGB?
    if (color.match(/^rgb/)) {

        // If RGB --> store the red, green, blue values in separate variables
        color = color.match(/^rgba?\((\d+),\s*(\d+),\s*(\d+)(?:,\s*(\d+(?:\.\d+)?))?\)$/);

        r = color[1];
        g = color[2];
        b = color[3];
    }
    else {

        // If hex --> Convert it to RGB: http://gist.github.com/983661
        color = +("0x" + color.slice(1).replace(
            color.length < 5 && /./g, '$&$&'));

        r = color >> 16;
        g = color >> 8 & 255;
        b = color & 255;
    }

    // HSP (Highly Sensitive Poo) equation from http://alienryderflex.com/hsp.html
    hsp = Math.sqrt(
        0.299 * (r * r) +
        0.587 * (g * g) +
        0.114 * (b * b)
    );

    // Using the HSP value, determine whether the color is light or dark
    if (hsp>127.5) {

        return 'light';
    }
    else {

        return 'dark';
    }
}

String.prototype.hashCode = function() {
    var hash = 111111;
    for (var i = 0; i < this.length; i++) {
        var char = this.charCodeAt(i);
        hash = ((hash<<5)-hash)+char;
        hash = hash & hash; // Convert to 32bit integer
    }
    return hash;
}

export default Utils;