var request = require('request');
var cheerio = require('cheerio');
// var app = express();
// var cors = require('cors');


// app.use(cors());

//app.addHeader("Access-Control-Allow-Origin", "*");
module.exports = function (req, res) {
	res.header('Access-Control-Allow-Origin', '*');
	
	//
	// Because I couldn't find a good source for colorpalette ids on colorhunt,
	// the below function generates a random number from 0 - 10000 and sees if it matches
	// a color palette code, and calls the function recursively if it doesn't.
	// 
	// This means its usually making several calls before returning data.
	//
	function getColorJson(url) {
	
		// Loads in colorhunt url via request
		request(url, function(error, _, html) {

			if(!error){

				// Parses html via cheerioJS
				
				var $ = cheerio.load(html);

				var json = {
					id: "",
					code: "",
					date: "",
					likes: "",
					c1: "",
					c2: "",
					c3: "",
					c4: ""
				};
										
				var script = $('#jscode').next().html();
				
				// Finds our string of data on the page
				// -- or returns "-1" to itemerIndex if the random code guess doesn't work
				var itemerIndex = script.search("itemer");  
				
				if (itemerIndex === -1) {
						console.log(url + "didn't work.");
						url = Math.floor(Math.random() * 100000).toString();
						getColorJson('http://colorhunt.co/c/' + url);
						return;
				}
				
				var itemerString = script.substr(itemerIndex, itemerIndex + 100);
				
				var itemer = itemerString.split("'");
				//console.log(itemer);
				
				json.id = itemer[1];
				json.code = itemer[3];
				json.date = itemer[5];
				json.likes = itemer[7];
				json.c1 = "#" + json.code.substring(0,6); 
				json.c2 = "#" + json.code.substring(6,12); 
				json.c3 = "#" + json.code.substring(12,18); 
				json.c4 = "#" + json.code.substring(18,24);

				console.log("The code " + json.id + " worked!");
				res.json(json);
				return;
			} else {
				console.log("Error on request: ")
				console.log(error);
			}

		})
	}

	// Generates first color code and initializes recursive function.
	var url = Math.floor(Math.random() * 100000).toString();
	getColorJson('http://colorhunt.co/c/' + url);
};