"use strict";

// external modules
var randomcolor = require('randomcolor');

// core
module.exports = function(name) {
    var color = randomcolor({
        seed: name,
        luminosity: 'dark'
    });
    var letter = name.substring(0, 1).toUpperCase();

    var svg = '<?xml version="1.0" encoding="UTF-8" standalone="no"?>';
    svg += '<svg xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns="http://www.w3.org/2000/svg" height="96" width="96" version="1.1" viewBox="0 0 96 96">';
    svg += '<g>';
    svg += '<rect width="96" height="96" fill="' + color + '" />';
    svg += '<text font-size="64px" font-family="sans-serif" text-anchor="middle" fill="#ffffff">';
    svg += '<tspan x="48" y="72" stroke-width=".26458px" fill="#ffffff">' + letter + '</tspan>';
    svg += '</text>';
    svg += '</g>';
    svg += '</svg>';

    return 'data:image/svg+xml;base64,' + new Buffer(svg).toString('base64');
};