var
	_ = require('_'),
	ko = require('ko'),

	Enums = require('Common/Enums'),
	Utils = require('Common/Utils'),
	Translator = require('Common/Translator'),

	Cache = require('Common/Cache'),

	MessageStore = require('Stores/User/Message'),

	Remote = require('Remote/User/Ajax'),

	kn = require('Knoin/Knoin'),
	AbstractView = require('Knoin/AbstractView');

/**
 * @constructor
 * @extends AbstractView
 */
function FolderClearPopupView()
{
	AbstractView.call(this, 'Popups', 'PopupsFolderClear');

	this.selectedFolder = ko.observable(null);
	this.clearingProcess = ko.observable(false);
	this.clearingError = ko.observable('');

	this.folderFullNameForClear = ko.computed(function() {
		var oFolder = this.selectedFolder();
		return oFolder ? oFolder.printableFullName() : '';
	}, this);

	this.folderNameForClear = ko.computed(function() {
		var oFolder = this.selectedFolder();
		return oFolder ? oFolder.localName() : '';
	}, this);

	this.dangerDescHtml = ko.computed(function() {
		return Translator.i18n('POPUPS_CLEAR_FOLDER/DANGER_DESC_HTML_1', {
			'FOLDER': this.folderNameForClear()
		});
	}, this);

	this.clearCommand = Utils.createCommand(this, function() {

		var
			self = this,
			oFolderToClear = this.selectedFolder();

		if (oFolderToClear)
		{
			MessageStore.message(null);
			MessageStore.messageList([]);

			this.clearingProcess(true);

			oFolderToClear.messageCountAll(0);
			oFolderToClear.messageCountUnread(0);

			Cache.setFolderHash(oFolderToClear.fullNameRaw, '');

			Remote.folderClear(function(sResult, oData) {

				self.clearingProcess(false);
				if (Enums.StorageResultType.Success === sResult && oData && oData.Result)
				{
					require('App/User').default.reloadMessageList(true);
					self.cancelCommand();
				}
				else
				{
					if (oData && oData.ErrorCode)
					{
						self.clearingError(Translator.getNotification(oData.ErrorCode));
					}
					else
					{
						self.clearingError(Translator.getNotification(Enums.Notification.MailServerError));
					}
				}
			}, oFolderToClear.fullNameRaw);
		}

	}, function() {

		var
			oFolder = this.selectedFolder(),
			bIsClearing = this.clearingProcess();

		return !bIsClearing && null !== oFolder;

	});

	kn.constructorEnd(this);
}

kn.extendAsViewModel(['View/Popup/FolderClear', 'PopupsFolderClearViewModel'], FolderClearPopupView);
_.extend(FolderClearPopupView.prototype, AbstractView.prototype);

FolderClearPopupView.prototype.clearPopup = function()
{
	this.clearingProcess(false);
	this.selectedFolder(null);
};

FolderClearPopupView.prototype.onShow = function(oFolder)
{
	this.clearPopup();
	if (oFolder)
	{
		this.selectedFolder(oFolder);
	}
};

module.exports = FolderClearPopupView;