var DBG = DBG || false;
var DBG1 = 1;
var _sesTimerEl = null;
var _sesExpireTimer = USER_SESSION_EXPIRE || 1200;
var _sesExpireCheck = false;
if (!BASE_URL) throw "Mising BASE_URL";
if (!SESSION_TIMER_URL) throw "Mising SESSION_TIMER_URL";
// if (!SESSION_AUTH_STATUS_URL) throw "Mising SESSION_AUTH_STATUS_URL";
if (!USER_LOGIN) throw "Mising USER_LOGIN";

/**
	IAuthStatus {
		type: string "expired" | "logged_in" | "logged_in_again"
		login: string
		expire: int
		time: timestamp (seconds)
	}
 */

function sesExpireTimeoutUpdate() {
	//console.log('sesExpireTimeoutUpdate: ' + _sesExpireTimer);
	if (!_sesTimerEl) return;
	if (_sesExpireTimer>=0) {
		var min = Math.floor(_sesExpireTimer / 60);
		var sek = _sesExpireTimer % 60;
		if (sek < 10) { sek = '0' + sek; }
		_sesTimerEl.innerHTML='' + min + ':' + sek + '';
		window.setTimeout(sesExpireTimeoutUpdate, 1000);
	} else {
		_sesTimerEl.innerHTML = 'expired!';
		window.setTimeout(sesExpireTimeoutUpdate, 1000);
	}
	_sesExpireTimer -= 1;
}


var sessionTimeoutStop = false;
var sessionTimeoutCheckFreq = 5;
var sessionTimeoutCheck = sessionTimeoutCheckFreq;
function sesAjaxTimerCheck() {
	DBG && console.log("DBG:S:sesAjaxTimerCheck", { sessionTimeoutStop, _sesExpireTimer });
	if (sessionTimeoutStop) return;

	if (SESSION_AUTH_STATUS_URL) fetchAuthStatus(SESSION_AUTH_STATUS_URL);
	else fetchSessionTimer(SESSION_TIMER_URL);

	if (_sesExpireTimer >= 0) {
		window.setTimeout(sesAjaxTimerCheck, sessionTimeoutCheckFreq * 1000);
		_sesExpireCheck = false;
	} else {
		// if (_sesExpireCheck) {
		// 	alert('Your current Session is over.');
		// } else {
		// 	window.setTimeout('sesAjaxTimerCheck', sessionTimeoutCheckFreq * 1000);
		// 	_sesExpireCheck=true;
		// }
	}
}
function fetchAuthStatus(url) {
	window.fetch(url, {
		credentials: "same-origin",
	}).then(function (response) {
		return response.text();
	}).then(function (responseText) {
		DBG && console.log("DBG:S:fetchAuthStatus response", { responseText, sessionTimeoutStop, _sesExpireTimer });
		try {
			var json = JSON.parse(responseText);
			return json;
		} catch (e) {
			return { type: responseText };
		}
	}).then(function (data) {
		DBG && console.warn("DBG:S:response data", { data });
		if (sessionTimeoutStop) return;
		var newSesTimer = parseInt(data.expire);
		if (!isNaN(newSesTimer) && newSesTimer > 0) {
			_sesExpireTimer = newSesTimer;
		} else {
			_sesExpireTimer = -1; // logout
			sendMsgToServiceWorker('session_expired')
			showSesExpireModal()
		}
	}).catch(function (err) {
		DBG && console.error(err)
	})
}
function fetchSessionTimer(url) {
	window.fetch(url, {
		credentials: "same-origin",
	}).then(function (response) {
		return response.text();
	}).then(function (data) {
		DBG && console.warn("DBG:S:response data", { data });
		if (sessionTimeoutStop) return;
		var newSesTimer = parseInt(data);
		if (!isNaN(newSesTimer) && newSesTimer > 0) {
			_sesExpireTimer = newSesTimer;
		} else {
			_sesExpireTimer = -1;// logout
			sendMsgToServiceWorker('session_expired')
			showSesExpireModal()
		}
	}).catch(function (err) {
		DBG && console.error(err)
	})
}
function showSesExpireModal() {
	var exprModal = document.getElementById('session-timer-modal');
	if (!exprModal) {
		var modalHtml = '<div id="session-timer-modal" class="modal fade" tabindex="-1" role="dialog" aria-labelledby="session-timer-modal-label" aria-hidden="true">' +
			'	<div class="modal-dialog">' +
			'		<div class="modal-content">' +
			'			<div class="modal-header">' +
			'				<h3 id="session-timer-modal-label">Zostałeś wylogowany</h3>' +
			'			</div>' +
			'			<div class="modal-footer">' +
			'				<a href="index.php" class="btn btn-primary">Zaloguj</a>' +
			'			</div>' +
			'		</div>' +
			'	</div>' +
			'</div>';
		exprModal = jQuery(modalHtml).appendTo('body');
	}
	jQuery('#session-timer-modal').modal({ show: true, keyboard: false, backdrop: 'static' });
	jQuery('#session-timer-modal').show();
}


jQuery(document).ready(function() {
	_sesTimerEl = document.getElementById('session-timer');
	if (_sesTimerEl) {
		_sesTimerEl.innerHTML = '...';
		sesExpireTimeoutUpdate();
	}
	window.setTimeout(sesAjaxTimerCheck, sessionTimeoutCheckFreq * 1000);
});

function stopTimer() {
	sessionTimeoutStop = true;
	return true;
}


function sendMsgToServiceWorker(data) {
	if (navigator.serviceWorker && navigator.serviceWorker.controller) {
		navigator.serviceWorker.controller.postMessage(data);
	}
}

if ('serviceWorker' in navigator) {
	navigator.serviceWorker.register(BASE_URL + 'sw.js').then(function() {
		return navigator.serviceWorker.ready;
	}).then(function (reg) {
		DBG && console.log("SW registration succeeded. Scope is "+reg.scope, { reg });
		navigator.serviceWorker.addEventListener('message', onServiceWorkerMsg);
		sendMsgToServiceWorker({ type: 'logged_in', login: USER_LOGIN, expire: _sesExpireTimer });
	}).catch(function (err) {
		DBG && console.error("SW registration failed with error "+err);
	});
}

function onServiceWorkerMsg(event) {
	var data = event.data || '';
	var msgType = (data && data.type) ? data.type || '' : data;
	DBG && console.log('DBG:onServiceWorkerMsg ', { msgType, data: event.data, event })
	if ('session_expired' === msgType) {
		_sesExpireTimer = -1;// logout
		showSesExpireModal()
	} else if ('logged_in' === msgType) {
		// jQuery('#session-timer-modal').hide()
	} else if ('logged_in_again' === msgType) {
		jQuery('#session-timer-modal').hide()
		_sesExpireTimer = data.expire;
		sesExpireTimeoutUpdate();
		sessionTimeoutStop = false;
		window.setTimeout(sesAjaxTimerCheck, sessionTimeoutCheckFreq * 1000);
	}
}


// global.sesExpireTimeoutUpdate = sesExpireTimeoutUpdate;
// global.sesAjaxTimerCheck = sesAjaxTimerCheck;