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

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

	Settings = require('Storage/Settings'),

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

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

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

	this.lock = ko.observable(false);

	this.capaTwoFactor = Settings.capa(Enums.Capa.TwoFactor);

	this.processing = ko.observable(false);
	this.clearing = ko.observable(false);
	this.secreting = ko.observable(false);

	this.viewUser = ko.observable('');
	this.twoFactorStatus = ko.observable(false);

	this.twoFactorTested = ko.observable(false);

	this.viewSecret = ko.observable('');
	this.viewBackupCodes = ko.observable('');
	this.viewUrlTitle = ko.observable('');
	this.viewUrl = ko.observable('');

	this.viewEnable_ = ko.observable(false);

	this.viewEnable = ko.computed({
		'owner': this,
		'read': this.viewEnable_,
		'write': function(bValue) {

			var self = this;

			bValue = !!bValue;

			if (bValue && this.twoFactorTested())
			{
				this.viewEnable_(bValue);

				Remote.enableTwoFactor(function(sResult, oData) {
					if (Enums.StorageResultType.Success !== sResult || !oData || !oData.Result)
					{
						self.viewEnable_(false);
					}

				}, true);
			}
			else
			{
				if (!bValue)
				{
					this.viewEnable_(bValue);
				}

				Remote.enableTwoFactor(function(sResult, oData) {
					if (Enums.StorageResultType.Success !== sResult || !oData || !oData.Result)
					{
						self.viewEnable_(false);
					}

				}, false);
			}
		}
	});

	this.viewTwoFactorEnableTooltip = ko.computed(function() {
		Translator.trigger();
		return this.twoFactorTested() || this.viewEnable_() ? '' :
			Translator.i18n('POPUPS_TWO_FACTOR_CFG/TWO_FACTOR_SECRET_TEST_BEFORE_DESC');
	}, this);

	this.viewTwoFactorStatus = ko.computed(function() {
		Translator.trigger();
		return Translator.i18n(this.twoFactorStatus() ?
			'POPUPS_TWO_FACTOR_CFG/TWO_FACTOR_SECRET_CONFIGURED_DESC' :
			'POPUPS_TWO_FACTOR_CFG/TWO_FACTOR_SECRET_NOT_CONFIGURED_DESC'
		);
	}, this);

	this.twoFactorAllowedEnable = ko.computed(function() {
		return this.viewEnable() || this.twoFactorTested();
	}, this);

	this.onResult = _.bind(this.onResult, this);
	this.onShowSecretResult = _.bind(this.onShowSecretResult, this);

	kn.constructorEnd(this);
}

kn.extendAsViewModel(['View/Popup/TwoFactorConfiguration', 'TwoFactorConfigurationPopupView'], TwoFactorConfigurationPopupView);
_.extend(TwoFactorConfigurationPopupView.prototype, AbstractView.prototype);

TwoFactorConfigurationPopupView.prototype.showSecret = function()
{
	this.secreting(true);
	Remote.showTwoFactorSecret(this.onShowSecretResult);
};

TwoFactorConfigurationPopupView.prototype.hideSecret = function()
{
	this.viewSecret('');
	this.viewBackupCodes('');
	this.viewUrlTitle('');
	this.viewUrl('');
};

TwoFactorConfigurationPopupView.prototype.createTwoFactor = function()
{
	this.processing(true);
	Remote.createTwoFactor(this.onResult);
};

TwoFactorConfigurationPopupView.prototype.logout = function()
{
	require('App/User').default.logout();
};

TwoFactorConfigurationPopupView.prototype.testTwoFactor = function()
{
	require('Knoin/Knoin').showScreenPopup(require('View/Popup/TwoFactorTest'), [this.twoFactorTested]);
};

TwoFactorConfigurationPopupView.prototype.clearTwoFactor = function()
{
	this.viewSecret('');
	this.viewBackupCodes('');
	this.viewUrlTitle('');
	this.viewUrl('');

	this.twoFactorTested(false);

	this.clearing(true);
	Remote.clearTwoFactor(this.onResult);
};

TwoFactorConfigurationPopupView.prototype.onShow = function(bLock)
{
	this.lock(!!bLock);

	this.viewSecret('');
	this.viewBackupCodes('');
	this.viewUrlTitle('');
	this.viewUrl('');
};

TwoFactorConfigurationPopupView.prototype.onHide = function()
{
	if (this.lock())
	{
		window.location.reload();
	}
};

TwoFactorConfigurationPopupView.prototype.getQr = function()
{
	return 'otpauth://totp/' + window.encodeURIComponent(this.viewUser()) +
		'?secret=' + window.encodeURIComponent(this.viewSecret()) +
		'&issuer=' + window.encodeURIComponent('');
};

TwoFactorConfigurationPopupView.prototype.onResult = function(sResult, oData)
{
	this.processing(false);
	this.clearing(false);

	if (Enums.StorageResultType.Success === sResult && oData && oData.Result)
	{
		this.viewUser(Utils.pString(oData.Result.User));
		this.viewEnable_(!!oData.Result.Enable);
		this.twoFactorStatus(!!oData.Result.IsSet);
		this.twoFactorTested(!!oData.Result.Tested);

		this.viewSecret(Utils.pString(oData.Result.Secret));
		this.viewBackupCodes(Utils.pString(oData.Result.BackupCodes).replace(/[\s]+/g, '  '));

		this.viewUrlTitle(Utils.pString(oData.Result.UrlTitle));
		this.viewUrl(qr.toDataURL({level: 'M', size: 8, value: this.getQr()}));
	}
	else
	{
		this.viewUser('');
		this.viewEnable_(false);
		this.twoFactorStatus(false);
		this.twoFactorTested(false);

		this.viewSecret('');
		this.viewBackupCodes('');
		this.viewUrlTitle('');
		this.viewUrl('');
	}
};

TwoFactorConfigurationPopupView.prototype.onShowSecretResult = function(sResult, oData)
{
	this.secreting(false);

	if (Enums.StorageResultType.Success === sResult && oData && oData.Result)
	{
		this.viewSecret(Utils.pString(oData.Result.Secret));
		this.viewUrlTitle(Utils.pString(oData.Result.UrlTitle));
		this.viewUrl(qr.toDataURL({level: 'M', size: 6, value: this.getQr()}));
	}
	else
	{
		this.viewSecret('');
		this.viewUrlTitle('');
		this.viewUrl('');
	}
};

TwoFactorConfigurationPopupView.prototype.onBuild = function()
{
	if (this.capaTwoFactor)
	{
		this.processing(true);
		Remote.getTwoFactor(this.onResult);
	}
};

module.exports = TwoFactorConfigurationPopupView;