// ==UserScript==
// @name           githubugz
// @namespace      paltman.com
// @description    Show commit details in FogBugz Tickets
// @include        https://*.fogbugz.com
// ==/UserScript==
// Set up configuration values by going to about:config in Firefox and changing
// the following parameters:
//
// greasemonkey.scriptvals.paltman.com/githubugz.user
// greasemonkey.scriptvals.paltman.com/githubugz.repo
// greasemonkey.scriptvals.paltman.com/githubugz.login
// greasemonkey.scriptvals.paltman.com/githubugz.token
// greasemonkey.scriptvals.paltman.com/githubugz.commit_regex -- defaults to 'Commit [a-f0-9]{40}'
(function() {
    var gh_localVersion = "0.0.1";
 
    var gh_user = GM_getValue('user', null);
    var gh_repo = GM_getValue('repo', null);
    var gh_login = GM_getValue('login', null);
    var gh_token = GM_getValue('token', null);
 
    if (gh_user && gh_repo && gh_login && gh_token) {
        var regex = GM_getValue('commit_regex', 'Commit: [a-f0-9]{40}');
        var gh_commit_sha = new RegExp(regex);
        var gh_sc = null;
        var gh_sc2 = null;
        var gh_api_url = 'https://github.com/api/v2/json/commits/show/';
        var debugMode = true;
        var jQuery = null;
 
        function init() {
            jQuery = this.jQuery;
            if (jQuery == null) {
                if (gh_sc == null) {
                    gh_sc = document.createElement('script');
                    gh_sc.src = 'http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js';
                    document.getElementsByTagName('head')[0].appendChild(gh_sc);
                }
                setTimeout(init, 500);
            } else {
                showInfo();
            }
        }
        init();
 
        function findSha(string_to_parse) {
            var m = gh_commit_sha.exec(string_to_parse);
            if (m != null && m.length == 1) {
                var u = m[0].replace('Commit: ', '');
                return u;
            }
            return null;
        }
 
 
 
 
        function extend(destination, source) {
            for (var property in source) destination[property] = source[property];
            return destination;
        }
 
        function log(message) {
            if (debugMode) {
                for (var i = 1; i < arguments.length; i++);
                message = message.replace('%s', arguments[i]);
 
                if (typeof GM_log == "function") GM_log(message);
                else if (window.console) console.log(message);
            }
        }
 
        function ajax(params) {
            var defaults = {
                method: 'GET',
                onerror: function(response) {
                    log('ERROR ' + response.status);
                }
            }
            var defaultHeaders = {
                'X-Requested-With': 'XMLHttpRequest',
                'Accept': 'application/json, text/javascript, text/html, */*'
            }
 
            params = extend(defaults, params);
            params.headers = extend(defaultHeaders, params.headers || {});
 
            if (typeof params.data == 'object') {
                params.data = objectToQueryString(params.data);
                params.headers['Content-type'] = 'application/x-www-form-urlencoded; charset=UTF-8';
            }
 
            return GM_xmlhttpRequest(params);
        }
 
        function loadJSON(url, onload, params) {
            params = extend({url: url, onload: onload}, params || {});
            var handler = params.onload;
 
            params.onload = function(response) {
				if (typeof response.getResponseHeader == 'function') {
                    // native XMLHttpRequest interface
                    var responseType = (response.getResponseHeader('Content-type') || '').split(';')[0];
                } else {
                    // GM_xmlhttpRequest interface
				    var responseType = (response.responseHeaders.match(/^Content-[Tt]ype:\s*([^\s;]+)/m) || [])[1];
                }
                if (responseType == 'application/json' || responseType == 'text/javascript') {
                    var object = eval("(" + response.responseText + ")");
                    if (object) handler(object, response);
                }
            }
            return ajax(params);
        }
 
 
        function showInfo() {
			sha = findSha(document.getElementsByTagName('body')[0].innerHTML);
            if (sha != null) {
                url = gh_api_url + gh_user + "/" + gh_repo + "/" + sha + "/?login=" + gh_login + "&token=" + gh_token;
                loadJSON(url, function(updates) {
                    el = jQuery('div.bugevent div.body:contains(Commit: ' + sha + ')');
 
                    html = '<div class="commit-details"><h1>Commit Details</h1><ul><li><b>Author:</b> ';
 					html += updates.commit.author.name + '</li><li><b>Message:</b> ' + updates.commit.message + "</li>";
					html += '<li><b>Commit: </b> <a href="'+ updates.commit.url +'">' + updates.commit.id + "</a></li></ul>";
                    for (i = 0; i < updates.commit.modified.length; i++) {
                        html += '<div class="diff"><pre>' + updates.commit.modified[i].diff + '</pre>';
                        html += '<span class="changed-file">' + updates.commit.modified[i].filename + '</span></div>';
                    }
                    html += '</div>';
                    el.append(html);
 
                    jQuery('div.commit-details ul').css('margin-top', '5px');
                    jQuery('div.diff pre').css('background-color', '#000').css('color', '#EEE').css('padding', '8px');
                    jQuery('div.commit-details h1').css('color', '#900');
                    jQuery('span.changed-file').css('font-size', '10pt').css('font-style', 'italic');
                });
            }
 
        }
    }
})();