// standalone script that spawns a web server from SlimerJS
// start it with `slimerjs-0.9.6/slimerjs webserver.js`

"use strict";

var nbPages = 3;
var page_i = 0;
var pages = [];
for (var i = 0; i < nbPages; i++) {
        pages[i] = require("webpage").create();
        pages[i].customHeaders = {
            "Accept":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
            "User-Agent":"Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.81 Safari/537.36",
        };
}

var webserver = require("webserver").create();

// use your exact hostname here. Otherwise the webserver won't be accessible
webserver.listen('ec2-22-173-41-22.compute-1.amazonaws.com:5000', function(request, response) {
    console.log('requested' + request.url);
    var infos = request.path.split('/');
    if (infos.length === 2) {
        var url = infos[1];

        page_i = (++page_i) % nbPages;
        console.log('using ' + page_i);
        var page = pages[page_i];
        page.open(url).then(function(){
            page.evaluateAsync(function(__end) {
                setTimeout(function() {
                    var canvas = document.querySelector('canvas');
                    var body = document.querySelector('body');
                    body.appendChild(canvas);
                    while ( body.firstChild.tagName !== 'CANVAS' ) body.removeChild( body.firstChild );
                }, 2200);
            });
            setTimeout(function() {
                var imagesrc = page.renderBase64('PNG');
                response.writeHead(200, {'Content-Type': 'image/png'});
                response.setEncoding('binary');
                response.write(atob(imagesrc));
                response.close();
            }, 100 + 2200);
        });
    }
    else {
        response.statusCode = 404;
        response.write('Not found');
        response.close();
    }
});
console.log('Listening on 5000');