/**
 * ImportPanel.js zarafa calender to ics im/exporter
 *
 * Author: Christoph Haas <christoph.h@sprinternet.at>
 * Copyright (C) 2012-2016 Christoph Haas
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *	
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

/**
 * ImportPanel
 *
 * The main Panel of the calendarimporter plugin.
 */
Ext.namespace("Zarafa.plugins.calendarimporter.dialogs"); 

/**
 * @class Zarafa.plugins.calendarimporter.dialogs.ImportPanel
 * @extends Ext.Panel
 */
Zarafa.plugins.calendarimporter.dialogs.ImportPanel = Ext.extend(Ext.Panel, {

	/* store the imported timezone here... */
	timezone: null,
	
	/* ignore daylight saving time... */
	ignoredst: null,
	
	/* path to ics file on server... */
	icsfile: null,
	
	/* loadmask for timezone/dst changes... */
	loadMask: null,
	
	/* export event buffer */
	exportResponse: [],
	
	/* how many requests are still running? */
	runningRequests: null,
	
	/* The store for the selection grid */
	store: null,

	/* selected folder */
	folder : null,

	/**
	 * @constructor
	 * @param {object} config
	 */
	constructor : function (config) {
		config = config || {};
		var self = this;
		this.timezone = container.getSettingsModel().get("zarafa/v1/plugins/calendarimporter/default_timezone");

		if (!Ext.isEmpty(config.filename)) {
			this.icsfile = config.filename;
		}

		if (!Ext.isEmpty(config.folder)) {
			this.folder = config.folder;
		}
		
		// create the data store
		this.store = new Ext.data.ArrayStore({
			fields: [
				{name: 'title'},
				{name: 'start'},
				{name: 'end'},
				{name: 'location'},
				{name: 'description'},
				{name: 'priority'},
				{name: 'label'},
				{name: 'busy'},
				{name: 'privatestate'},
				{name: 'organizer'},
				{name: 'trigger'}
			]
		});
		
		Ext.apply(config, {
			xtype     : 'calendarimporter.importpanel',
			ref		  : "importpanel",
			id		  : "importpanel",
			layout    : {
				type  : 'form',
				align : 'stretch'
			},
			anchor	  : '100%',
			bodyStyle : 'background-color: inherit;',
			defaults  : {
				border      : true,
				bodyStyle   : 'background-color: inherit; padding: 3px 0px 3px 0px; border-style: none none solid none;'
			},
			items : [
				this.createSelectBox(),
				this.createTimezoneBox(),
				this.createDaylightSavingCheckBox(),
				this.initForm(),
				this.createGrid()
			],
			buttons: [
				this.createSubmitAllButton(),
				this.createSubmitButton(),
				this.createCancelButton()
			], 
			listeners: {
				afterrender: function (cmp) {
					this.loadMask = new Ext.LoadMask(this.getEl(), {msg:'Loading...'});
					
					if(this.icsfile != null) { // if we have got the filename from an attachment
						this.parseCalendar(this.icsfile, this.timezone, this.ignoredst);
					}
				},
				scope: this
			}
		});
		
		Zarafa.plugins.calendarimporter.dialogs.ImportPanel.superclass.constructor.call(this, config);
	},

	/**
	 * Init embedded form, this is the form that is
	 * posted and contains the attachments
	 * @private
	 */
	initForm : function () {
		return {
			xtype: 'form',
			ref: 'addFormPanel',
			layout : 'column',
			fileUpload: true,
			autoWidth: true,
			autoHeight: true,
			border: false,
			bodyStyle: 'padding: 5px;',
			defaults: {
				anchor: '95%',
				border: false,
				bodyStyle: 'padding: 5px;'
			},
			items: [this.createUploadField()]
		};
	},

	/**
	 * Get all calendar folders.
	 * @param {boolean} asDropdownStore If true, a simple array store will be returned.
	 * @returns {*}
	 */
	getAllCalendarFolders: function (asDropdownStore) {
		asDropdownStore = Ext.isEmpty(asDropdownStore) ? false : asDropdownStore;

		var allFolders = [];

		var inbox = container.getHierarchyStore().getDefaultStore();
		var pub = container.getHierarchyStore().getPublicStore();

		if (!Ext.isEmpty(inbox.subStores) && inbox.subStores.folders.totalLength > 0) {
			for (var i = 0; i < inbox.subStores.folders.totalLength; i++) {
				var folder = inbox.subStores.folders.getAt(i);
				if (folder.get("container_class") == "IPF.Appointment") {
					if (asDropdownStore) {
						allFolders.push([
							folder.get("entryid"),
							folder.get("display_name")
						]);
					} else {
						allFolders.push({
							display_name : folder.get("display_name"),
							entryid      : folder.get("entryid"),
							store_entryid: folder.get("store_entryid"),
							is_public    : false
						});
					}
				}
			}
		}

		if (!Ext.isEmpty(pub.subStores) && pub.subStores.folders.totalLength > 0) {
			for (var j = 0; j < pub.subStores.folders.totalLength; j++) {
				var folder = pub.subStores.folders.getAt(j);
				if (folder.get("container_class") == "IPF.Appointment") {
					if (asDropdownStore) {
						allFolders.push([
							folder.get("entryid"),
							folder.get("display_name") + " (Public)"
						]);
					} else {
						allFolders.push({
							display_name : folder.get("display_name"),
							entryid      : folder.get("entryid"),
							store_entryid: folder.get("store_entryid"),
							is_public    : true
						});
					}
				}
			}
		}

		if (asDropdownStore) {
			return allFolders.sort(this.dynamicSort(1));
		} else {
			return allFolders;
		}
	},

	/**
	 * Dynamic sort function, sorts by property name.
	 * @param {string|int} property
	 * @returns {Function}
	 */
	dynamicSort: function (property) {
		var sortOrder = 1;
		if (property[0] === "-") {
			sortOrder = -1;
			property = property.substr(1);
		}
		return function (a, b) {
			var result = (a[property].toLowerCase() < b[property].toLowerCase()) ? -1 : (a[property].toLowerCase() > b[property].toLowerCase()) ? 1 : 0;
			return result * sortOrder;
		}
	},

	/**
	 * Return a calendar folder element by name.
	 * @param {string} name
	 * @returns {*}
	 */
	getCalendarFolderByName: function (name) {
		var folders = this.getAllCalendarFolders(false);

		for (var i = 0; i < folders.length; i++) {
			if (folders[i].display_name == name) {
				return folders[i];
			}
		}

		return container.getHierarchyStore().getDefaultFolder('calendar');
	},

	/**
	 * Return a calendar folder element by entryid.
	 * @param {string} entryid
	 * @returns {*}
	 */
	getCalendarFolderByEntryid: function (entryid) {
		var folders = this.getAllCalendarFolders(false);

		for (var i = 0; i < folders.length; i++) {
			if (folders[i].entryid == entryid) {
				return folders[i];
			}
		}

		return container.getHierarchyStore().getDefaultFolder('calendar');
	},

	/**
	 * Reloads the data of the grid
	 * @private
	 */
	reloadGridStore: function(eventdata) {
		var parsedData = [];
		
		// this is done to get rid of the local browser timezone....
		// because all timezone specific stuff is done via php
		var local_tz_offset = new Date().getTimezoneOffset() * 60000;  // getTimezoneOffset returns minutes... we need milliseconds
		
		
		if(eventdata !== null) {
			parsedData = new Array(eventdata.events.length);
			var i = 0;
			for(i = 0; i < eventdata.events.length; i++) {
				var trigger = null;
				
				if(eventdata.events[i]["VALARM"]) {
					trigger = eventdata.events[i]["VALARM"]["TRIGGER"];
					trigger = new Date(parseInt(trigger) + local_tz_offset);
				}
				parsedData[i] = new Array(eventdata.events[i]["SUMMARY"], new Date(parseInt(eventdata.events[i]["DTSTART"]) + local_tz_offset), new Date(parseInt(eventdata.events[i]["DTEND"]) + local_tz_offset), eventdata.events[i]["LOCATION"], eventdata.events[i]["DESCRIPTION"],eventdata.events[i]["PRIORITY"],eventdata.events[i]["X-ZARAFA-LABEL"],eventdata.events[i]["X-MICROSOFT-CDO-BUSYSTATUS"],eventdata.events[i]["CLASS"],eventdata.events[i]["ORGANIZER"],trigger);
			}
		} else {
			return null;
		}

		this.store.loadData(parsedData, false);
	},
	
	/**
	 * Init embedded form, this is the form that is
	 * posted and contains the attachments
	 * @private
	 */
	createGrid : function() {
		return {
			xtype: 'grid',
			ref: 'eventgrid',
			id: 'eventgrid',
			columnWidth: 1.0,
			store: this.store,
			width: '100%',
			height: 300,
			title: 'Select events to import',
			frame: false,
			viewConfig:{
				forceFit:true
			},
			colModel: new Ext.grid.ColumnModel({
				defaults: {
					width: 300,
					sortable: true
				},
				columns: [
					{id: 'Summary', header: 'Title', width: 200, sortable: true, dataIndex: 'title'},
					{header: 'Start', width: 200, sortable: true, dataIndex: 'start', renderer : Zarafa.common.ui.grid.Renderers.datetime},
					{header: 'End', width: 200, sortable: true, dataIndex: 'end', renderer : Zarafa.common.ui.grid.Renderers.datetime},
					{header: 'Location', width: 150, sortable: true, dataIndex: 'location'},
					{header: 'Description', sortable: true, dataIndex: 'description'},
					{header: "Priority", dataIndex: 'priority', hidden: true},
					{header: "Label", dataIndex: 'label', hidden: true},
					{header: "Busystatus", dataIndex: 'busy', hidden: true},
					{header: "Privacystatus", dataIndex: 'privatestate', hidden: true},
					{header: "Organizer", dataIndex: 'organizer', hidden: true},
					{header: "Alarm", dataIndex: 'trigger', hidden: true, renderer : Zarafa.common.ui.grid.Renderers.datetime}
				]
			}),
			sm: new Ext.grid.RowSelectionModel({multiSelect:true})
		}
	},
	
	createSelectBox: function() {
		var myStore = this.getAllCalendarFolders(true);

		return {
			xtype: "selectbox",
			ref: 'calendarselector',
			editable: false,
			name: "choosen_calendar",
			value: Ext.isEmpty(this.folder) ? this.getCalendarFolderByName(container.getSettingsModel().get("zarafa/v1/plugins/calendarimporter/default_calendar")).entryid : this.folder,
			width: 100,
			fieldLabel: "Select folder",
			store: myStore,
			mode: 'local',
			labelSeperator: ":",
			border: false,
			anchor: "100%",
			scope: this,
			hidden        : Ext.isEmpty(this.folder) ? false : true,
			allowBlank: false
		}
	},
	
	createTimezoneBox: function() {
		return {
			xtype: "selectbox",
			ref: 'timezoneselector',
			editable: false,
			name: "choosen_timezone",
			value: Zarafa.plugins.calendarimporter.data.Timezones.unMap(container.getSettingsModel().get("zarafa/v1/plugins/calendarimporter/default_timezone")),
			width: 100,
			fieldLabel: "Timezone",
			store: Zarafa.plugins.calendarimporter.data.Timezones.store,
			labelSeperator: ":",
			mode: 'local',
			border: false,
			anchor: "100%",
			scope: this,
			allowBlank: true,
			listeners: {
				select: this.onTimezoneSelected,
				scope: this
			}
		}
	},
	
	createDaylightSavingCheckBox: function() {
		return {
			xtype: "checkbox",
			ref: 'dstcheck',
			name: "dst_check",
			width: 100,
			fieldLabel: "Ignore DST",
			boxLabel: 'This will ignore "Daylight saving time" offsets.',
			labelSeperator: ":",
			border: false,
			anchor: "100%",
			scope: this,
			allowBlank: true,
			listeners: {
				check: this.onDstChecked,
				scope: this
			}
		}
	},
	
	createUploadField: function() {
		return {
			xtype: "fileuploadfield",
			ref: 'fileuploadfield',
			columnWidth: 1.0,
			id: 'form-file',    
			name: 'icsdata',
			emptyText: 'Select an .ics calendar',
			border: false,
			anchor: "100%",
			height     : "30",
			scope: this,
			allowBlank: false,
			listeners: {
				fileselected: this.onFileSelected,
				scope: this
			}
		}
	},
	
	createSubmitButton: function() {
		return {
			xtype: "button",
			ref: "submitButton",
			disabled: true,
			width: 100,
			border: false,
			text: _("Import"),
			anchor: "100%",
			handler: this.importCheckedEvents,
			scope: this
		}
	},
	
	createSubmitAllButton: function() {
		return {
			xtype: "button",
			ref: "submitAllButton",
			disabled: true,
			width: 100,
			border: false,
			text: _("Import All"),
			anchor: "100%",
			handler: this.importAllEvents,
			scope: this
		}
	},
	
	createCancelButton: function() {
		return {
			xtype: "button",
			width: 100,
			border: false,
			text: _("Cancel"),
			anchor: "100%",
			handler: this.close,
			scope: this
		}
	},
	
	/**
	 * This is called when a timezone has been seleceted in the timezone dialog
	 * @param {Ext.form.ComboBox} combo
	 * @param {Ext.data.Record} record
	 * @param {Number} index
	 */
	onTimezoneSelected : function(combo, record, index) {
		this.timezone = record.data.field1;
		
		if(this.icsfile != null) {
			this.parseCalendar(this.icsfile, this.timezone, this.ignoredst);
		}
	},
	
	/**
	 * This is called when the dst checkbox has been selected
	 * @param {Ext.form.CheckBox} checkbox
	 * @param {boolean} checked
	 */
	onDstChecked : function(checkbox, checked) {
		this.ignoredst = checked;
		
		if(this.icsfile != null) {
			this.parseCalendar(this.icsfile, this.timezone, this.ignoredst);
		}
	},
	
	/**
	 * This is called when a file has been seleceted in the file dialog
	 * in the {@link Ext.ux.form.FileUploadField} and the dialog is closed
	 * @param {Ext.ux.form.FileUploadField} uploadField being added a file to
	 */
	onFileSelected : function(uploadField) {
		var form = this.addFormPanel.getForm();

		if (form.isValid()) {
			form.submit({
				waitMsg: 'Uploading and parsing calendar...',
				url: 'plugins/calendarimporter/php/upload.php',
				failure: function(file, action) {
					this.submitButton.disable();
					this.submitAllButton.disable();
					Zarafa.common.dialogs.MessageBox.show({
						title   : _('Error'),
						msg     : _(action.result.error),
						icon    : Zarafa.common.dialogs.MessageBox.ERROR,
						buttons : Zarafa.common.dialogs.MessageBox.OK
					});
				},
				success: function(file, action){
					uploadField.reset();
					this.icsfile = action.result.ics_file;
					
					this.parseCalendar(this.icsfile, this.timezone, this.ignoredst);
				},
				scope : this
			});
		}
	},
	
	parseCalendar: function (icsPath, timezone, ignoredst) {
		this.loadMask.show();

		var responseHandler = new Zarafa.plugins.calendarimporter.data.ResponseHandler({
			successCallback: this.handleParsingResult,
			scope: this
		});
		
		container.getRequest().singleRequest(
			'calendarmodule',
			'load',
			{
				ics_filepath: icsPath,
				timezone: timezone,
				ignore_dst: ignoredst
			},
			responseHandler
		);
	},
	
	handleParsingResult: function(response) {
		this.loadMask.hide();
		
		if(response["status"] == true) {
			this.submitButton.enable();
			this.submitAllButton.enable();

			if(typeof response.parsed.calendar["X-WR-TIMEZONE"] !== "undefined") {
				this.timezone = response.parsed.calendar["X-WR-TIMEZONE"];
				this.timezoneselector.setValue(Zarafa.plugins.calendarimporter.data.Timezones.unMap(this.timezone));
			}
			this.reloadGridStore(response.parsed);
		} else {
			this.submitButton.disable();
			this.submitAllButton.disable();
			Zarafa.common.dialogs.MessageBox.show({
				title   : _('Parser Error'),
				msg     : _(response["message"]),
				icon    : Zarafa.common.dialogs.MessageBox.ERROR,
				buttons : Zarafa.common.dialogs.MessageBox.OK
			});
		}
	},

	close: function () {
		this.addFormPanel.getForm().reset();
		this.dialog.close()
	},

	importCheckedEvents: function () {
		var newRecords = this.eventgrid.selModel.getSelections();
		this.importEvents(newRecords);
    },

	importAllEvents: function () {
		//receive Records from grid rows
		this.eventgrid.selModel.selectAll();  // select all entries
		var newRecords = this.eventgrid.selModel.getSelections();
		this.importEvents(newRecords);
    },
	
	/** 
	 * This function stores all given events to the appointmentstore 
	 * @param events
	 */
	importEvents: function (events) {
		//receive existing calendar store
		var calValue = this.calendarselector.getValue();

		if(Ext.isEmpty(calValue)) { // no calendar choosen
			Zarafa.common.dialogs.MessageBox.show({
				title   : _('Error'),
				msg     : _('You have to choose a calendar!'),
				icon    : Zarafa.common.dialogs.MessageBox.ERROR,
				buttons : Zarafa.common.dialogs.MessageBox.OK
			});
		} else {
			if(this.eventgrid.selModel.getCount() < 1) {
				Zarafa.common.dialogs.MessageBox.show({
					title   : _('Error'),
					msg     : _('You have to choose at least one event to import!'),
					icon    : Zarafa.common.dialogs.MessageBox.ERROR,
					buttons : Zarafa.common.dialogs.MessageBox.OK
				});
			} else {
				var calendarFolder = this.getContactFolderByEntryid(folderValue);

				this.loadMask.show();
				var uids = [];

				//receive Records from grid rows
				Ext.each(events, function(newRecord) {
					uids.push(newRecord.data.record.internal_fields.event_uid);
				}, this);

				var responseHandler = new Zarafa.plugins.contactimporter.data.ResponseHandler({
					successCallback: this.importEventsDone,
					scope: this
				});

				container.getRequest().singleRequest(
					'calendarmodule',
					'import',
					{
						storeid     : contactFolder.store_entryid,
						folderid    : contactFolder.entryid,
						uids        : uids,
						vcf_filepath: this.vcffile
					},
					responseHandler
				);
			}
		}
	},

	/**
	 * Callback for the import request.
	 * @param {Object} response
	 */
	importEventsDone: function (response) {
		this.loadMask.hide();
		this.dialog.close();
		if (response.status == true) {
			container.getNotifier().notify('info', 'Imported', 'Imported ' + response.count + ' events. Please reload your calendar!');
		} else {
			Zarafa.common.dialogs.MessageBox.show({
				title  : _('Error'),
				msg    : _('Import failed: ') + response.message,
				icon   : Zarafa.common.dialogs.MessageBox.ERROR,
				buttons: Zarafa.common.dialogs.MessageBox.OK
			});
		}
	}
});

Ext.reg('calendarimporter.importpanel', Zarafa.plugins.calendarimporter.dialogs.ImportPanel);