/*

 * JavaScript file

 */

var SETUP_ID = 1;

var timervalue = 30;

var initialTimer = 30;

var timeoutId = null;

var paused = true;

var displayUp = true;

function init()

{

	showMainWindow();

	widget.setDisplayPortrait();

	watchSensorNotifications();

	startTimer();

}

// Call this function to add a callback that will be notified of orientation

// changes

function watchSensorNotifications() {

	var sensors = device.getServiceObject("Service.Sensor", "ISensor");

	var SensorParams = {

		SearchCriterion : "Orientation"

	};

	var result = sensors.ISensor.FindSensorChannel(SensorParams);

	if (result.ErrorCode != 0) {

		var errorCode = result.ErrorCode;

		var errorMessage = result.ErrorMessage;

		return null;

	}

	var result2 = sensors.ISensor.RegisterForNotification(

			{ ChannelInfoMap : result.ReturnValue[0], 

				ListeningType : "ChannelData" }, sensorCallback);

	if (result.ErrorCode == 0) {

		var transactionId = result.TransactionID;

		return transactionId;

	} else {

		var errorCode = result.ErrorCode;

		var errorMessage = result.ErrorMessage;

		return null;

	}

}

function turn(up) {

	if (up != displayUp) {

		displayUp = up;

		timervalue = initialTimer - timervalue;

		showValues();

	}

}

// This function can be passed as callback to

// sensors.ISensor.RegisterForNotification method

function sensorCallback(transactionId, code, result) {

	if (result.ErrorCode == 0) {

		var dataType = result.ReturnValue.DataType;

		var orientation = result.ReturnValue.DeviceOrientation;

		if (orientation == "DisplayUp") {

			turn(true);

		} else if (orientation == "DisplayDown") {

			turn(false);

		}

	} else {

		var errorCode = result.ErrorCode;

		var errorMessage = result.ErrorMessage;

	}

}

function startTimer() {

	var hr = parseInt(document.getElementById("hrs").value);

	var min = parseInt(document.getElementById("min").value);

	var sec = parseInt(document.getElementById("sec").value);

	timervalue = hr * 3600 + min * 60 + sec;

	initialTimer = timervalue;

	showMainWindow();

	startCountdown();

}

function startCountdown() {

	if (timeoutId) {

		clearInterval(timeoutId);

	}

	timeoutId = window.setInterval(tick, 1000);

	tick();

}

function showValues() {

	var hrs = Math.floor(timervalue / 3600);

	var mins = Math.floor((timervalue % 3600) / 60);

	var sec = timervalue % 60;

	var sz = pad(hrs) + ":" + pad(mins) + ":" + pad(sec);

	document.getElementById("timervalue").innerHTML = sz;

	var sand=document.getElementById("sand");

	var sandBottom = document.getElementById("sand-bottom");

	var top, bottom;

	top = (50 * (initialTimer-timervalue)/initialTimer).toFixed(0) + "%";

	bottom = "50%";

	if (displayUp) {

		sand.style.top = top;

		sand.style.bottom = bottom;

	} else {

		sandBottom.style.bottom = top;

		sandBottom.style.top = bottom;

	}

	bottom = "0%";

	top = (50 + (50 * timervalue/initialTimer)).toFixed(0) + "%";

	if (displayUp) {

		sandBottom.style.top = top;

		sandBottom.style.bottom = bottom;

	} else {

		sand.style.top = bottom;

		sand.style.bottom = top;

	}

}

function tick() {

	if (timervalue > 0) {

		timervalue = timervalue - 1;

		showValues();

	}

}

function pad(num) {

	if (num < 10) {

		return '0' + num;

	} else {

		return num;

	}

}

function cancelTimer() {

	clearInterval(timeoutId);

	timeoutId = 0;

	timervalue = 0;

	document.getElementById("timervalue").innerHTML = "00:00:00";

	document.getElementById("sand").style.top="50%";

	document.getElementById("sand-bottom").style.top="50%";

}

function showMainWindow() {

	document.getElementById("main-window").style.display = "inherit";

	document.getElementById("time-setup").style.display = "none";

	var item = new MenuItem("Setup timer", SETUP_ID);

	item.onSelect = showTimerSetup;

	menu.append(item);

	menu.setRightSoftkeyLabel("Exit", null);

}

function showTimerSetup() {

	document.getElementById("main-window").style.display = "none";

	document.getElementById("time-setup").style.display = "inherit";

	var item = menu.getMenuItemById(SETUP_ID);

	menu.remove(item);

	menu.setRightSoftkeyLabel("Cancel", showMainWindow);

}