/**

* Simple in memory stats object per request for displaying stats in developer mode

*/

var _ = require('lodash');

var fs = require('fs');

var Hogan = require('hogan.js');

var crypto = require('crypto');

function DebugMode() {

var self = this;

self.data = {}

}

module.exports = DebugMode;

DebugMode.prototype.add = function(fragmentUrl, data) {

var self = this;

var debugData = _.clone(data);

var hash = crypto.createHash('md5').update(fragmentUrl).digest('hex');

debugData.hash = hash;

self.data[hash] = _.merge(debugData, self.data[hash] || {});

};

DebugMode.prototype.render = function() {

var self = this;

// sync read JS - ok as this is only used in dev or debug

var js = fs.readFileSync(__dirname + '/client/cx-stats.js');

var jsLib = fs.readFileSync(__dirname + '/client/cx-libs.js');

var css = fs.readFileSync(__dirname + '/client/cx-stats.css');

var htmlTemplate = Hogan.compile(fs.readFileSync(__dirname + '/client/cx-template.html').toString());

// Run each fragment through the template;

var output = ['<style>',css,'</style>','<script>','var cxStats = ' + JSON.stringify(self.data, null, 4),jsLib,js,'</script>'].join('\n');

for(var key in self.data) {

output += htmlTemplate.render(self.data[key]) + '\n';

}

return output;

};