define(['require','modules/apps_cache','shared/manifest_helper','modules/settings_cache','modules/mvvm/list_view','./layout_template'],function(require){'use strict';var AppsCache=require('modules/apps_cache');var ManifestHelper=require('shared/manifest_helper');var SettingsCache=require('modules/settings_cache');var ListView=require('modules/mvvm/list_view');var template=require('./layout_template');var THEME_SELECTED='theme.selected';var WALLPAPER_LIST='/wallpaper.json';var WALLPAPER_KEY='wallpaper.image';var Themes=function ctor_themes(){return{_container:null,_settings:null,_selectedTheme:null,_previousTheme:null,_themes:null,_config:{},onInit:function th_onInit(panel){this._container=panel.querySelector('.theme-list');this._settings=navigator.mozSettings;},onBeforeShow:function th_onBeforeShow(){this._themes=[];this.getInstalledThemes((this.setTheme));},getInstalledThemes:function th_getInstalledThemes(callback){AppsCache.apps().then(function(apps){apps=apps.filter(function(app){var manifest=app.manifest||app.updateManifest;return manifest&&manifest.type&&manifest.type==='certified'&&manifest.role&&manifest.role==='theme';});for(var app in apps){var manifest=new ManifestHelper(apps[app].manifest);var theme={'name':manifest.name,'manifestURL':apps[app].manifestURL,'onclick':callback.bind(this)};this._themes.push(theme);}
this._themes.sort(function(a,b){return a.name.localeCompare(b.name);});this.renderThemes();}.bind(this));},renderThemes:function th_renderThemes(){this._listView=ListView(this._container,this._themes,template);this.updateRadioButtons();},updateRadioButtons:function th_updateRadioButtons(){var currentSetting=SettingsCache.cache;if(!currentSetting){return;}
var theme=this._selectedTheme=currentSetting[THEME_SELECTED];this._updateRow(theme,true);},_doSetTheme:function th_doSetTheme(theme){if(this._selectedTheme===theme){return Promise.resolve();}
return new Promise((function(resolve,reject){var setting={};this._previousTheme=this._selectedTheme;setting[THEME_SELECTED]=this._selectedTheme=theme;var req=this._settings.createLock().set(setting);req.onsuccess=(function(){this.getWallpaperPath().then((this.loadWallpaper).bind(this)).then((this.setWallpaper).bind(this)).then((this.saveConfig).bind(this)).then(resolve,reject);}).bind(this);req.onerror=reject;}).bind(this));},setTheme:function th_setTheme(theme){this.disableSelection();return this._doSetTheme(theme).then(this.enableSelection.bind(this),this.rollbackTheme.bind(this));},rollbackTheme:function th_rollbackTheme(){this._config={};if(this._previousTheme===this._selectedTheme||this._previousTheme===null){return Promise.reject('No previous theme to rollback');}
var previous=''+this._previousTheme;var current=''+this._selectedTheme;return this._doSetTheme(this._previousTheme).then((function(){this._updateRow(previous,true);this._updateRow(current,false);this.enableSelection();}).bind(this));},_updateRow:function th_updateRow(theme,checked){var rule='gaia-radio[value="'+theme+'"]';var node=this._container.querySelector(rule);if(node){node.checked=!!checked;}},disableSelection:function th_disableSelection(){var nodes=this._container.querySelectorAll('gaia-radio:not([value="'+
this._selectedTheme+'"])');if(nodes){Array.prototype.slice.call(nodes).forEach(function(node){node.parentNode.parentNode.classList.add('disabled');});}},enableSelection:function th_enableSelection(){var nodes=this._container.querySelectorAll('gaia-radio');if(nodes){Array.prototype.slice.call(nodes).forEach(function(node){node.parentNode.parentNode.classList.remove('disabled');});}},getWallpaperPath:function th_getWallpaper(){var url=this._selectedTheme.substring(0,this._selectedTheme.lastIndexOf('/'))+WALLPAPER_LIST;var xhr=new XMLHttpRequest({mozSystem:true});xhr.open('GET',url,true);xhr.responseType='json';return new Promise(function(resolve,reject){xhr.onload=function successGettingWallpaperList(){if(xhr.status!==200){reject(xhr.status);return;}
var filename=xhr.response.homescreen;resolve(filename);};xhr.send(null);});},loadWallpaper:function th_loadWallpaper(filename){if(!filename){return Promise.resolve(null);}
var url=this._selectedTheme.substring(0,this._selectedTheme.lastIndexOf('/'))+filename;var xhr=new XMLHttpRequest({mozSystem:true});xhr.open('GET',url,true);xhr.responseType='blob';return new Promise(function(resolve,reject){xhr.onload=function(){if(xhr.status!==200){reject(xhr.status);return;}
resolve(xhr.response);};xhr.send(null);});},setWallpaper:function th_setWallpaper(blob){this._config[WALLPAPER_KEY]=blob;return Promise.resolve(this._config);},saveConfig:function th_saveConfig(){var self=this;return new Promise(function(resolve,reject){var request=self._settings.createLock().set(self._config);request.onerror=reject;request.onsuccess=resolve;});}};};return Themes;});