//Developed by Vladimir Lebedko

var sMarkerIcon;
var sMarker;
var dMarkerIcon;
var dMarker;
var seletedLayout;
var seletedLimits;
var seletedLimitToDistanceType;
var seletedLimitValue;
var sIgnorFirst;
var dIgnorFirst;
var mTimeStart;
var mTimeRemaining;

sMarkerIcon = new GIcon();
sMarkerIcon.image = "sMarker.png";
sMarkerIcon.iconSize = new GSize(20, 34);
sMarkerIcon.shadow = "shadow.png"
sMarkerIcon.shadowSize = new GSize(37, 34);
sMarkerIcon.iconAnchor = new GPoint(9, 34);
sMarkerIcon.infoWindowAnchor = new GPoint(5, 1);

dMarkerIcon = new GIcon();
dMarkerIcon.image = "dMarker.png";
dMarkerIcon.iconSize = new GSize(20, 34);
dMarkerIcon.shadow = "shadow.png"
dMarkerIcon.shadowSize = new GSize(37, 34);
dMarkerIcon.iconAnchor = new GPoint(9, 34);
dMarkerIcon.infoWindowAnchor = new GPoint(5, 1);

function changeView(mName){
    if (document.getElementById(mName).style.display != 'none') {
        document.getElementById(mName).style.display = 'none'
    }
    else {
        document.getElementById(mName).style.display = '';
    }
}

function changeLimits(mName){
    document.getElementById("oShowOnlyTop").disabled = true;
    document.getElementById("oLimitToTime").disabled = true;
    document.getElementById("oLimitToDistance").disabled = true;
    document.getElementById("oLimitToDistanceTypeK").disabled = true;
    document.getElementById("oLimitToDistanceTypeM").disabled = true;
    switch (mName) {
        case "showOnlyTop":
            document.getElementById("oShowOnlyTop").disabled = false;
            break;
        case "limitToTime":
            document.getElementById("oLimitToTime").disabled = false;
            break;
        case "limitToDistance":
            document.getElementById("oLimitToDistance").disabled = false;
            document.getElementById("oLimitToDistanceTypeK").disabled = false;
            document.getElementById("oLimitToDistanceTypeM").disabled = false;
            break;
        default:
    }
}

function changeColumnLetter(mGroup, mName){
    var vArray = new Array(false, false, false, false, false, false);
    var fValue = -1;
    
    vArray[document.getElementById(mGroup + "Name").selectedIndex] = true;
    vArray[document.getElementById(mGroup + "Street").selectedIndex] = true;
    vArray[document.getElementById(mGroup + "City").selectedIndex] = true;
    vArray[document.getElementById(mGroup + "Zip").selectedIndex] = true;
    vArray[document.getElementById(mGroup + "State").selectedIndex] = true;
    vArray[document.getElementById(mGroup + "Country").selectedIndex] = true;
    
    for (i = 0; i < vArray.length; i++) {
        if (vArray[i] == false) 
            fValue = i;
    }
    
    if (fValue == -1) 
        return;
    
    if (mName != "Name" && (document.getElementById(mGroup + "Name").selectedIndex == document.getElementById(mGroup + mName).selectedIndex)) {
        document.getElementById(mGroup + "Name").selectedIndex = fValue;
    }
    if (mName != "Street" && (document.getElementById(mGroup + "Street").selectedIndex == document.getElementById(mGroup + mName).selectedIndex)) {
        document.getElementById(mGroup + "Street").selectedIndex = fValue;
    }
    if (mName != "City" && (document.getElementById(mGroup + "City").selectedIndex == document.getElementById(mGroup + mName).selectedIndex)) {
        document.getElementById(mGroup + "City").selectedIndex = fValue;
    }
    if (mName != "Zip" && (document.getElementById(mGroup + "Zip").selectedIndex == document.getElementById(mGroup + mName).selectedIndex)) {
        document.getElementById(mGroup + "Zip").selectedIndex = fValue;
    }
    if (mName != "State" && (document.getElementById(mGroup + "State").selectedIndex == document.getElementById(mGroup + mName).selectedIndex)) {
        document.getElementById(mGroup + "State").selectedIndex = fValue;
    }
    if (mName != "Country" && (document.getElementById(mGroup + "Country").selectedIndex == document.getElementById(mGroup + mName).selectedIndex)) {
        document.getElementById(mGroup + "Country").selectedIndex = fValue;
    }
}

function changeStartingAddressFile(){
    var tS = document.getElementById("fStartingAddressFile").value;
    if (tS.length < 4) {
        return false;
    }
    if ((tS.substring(tS.length - 4, tS.length)).toUpperCase() != ".XLS") {
        alert("File type incorrect. Please select .XLS file.");
        return false;
    }
    document.getElementById("cAction").value = "changeStartingAddressFile";
    document.mForm.submit();
    return true;
}

function changeDestinationAddressFile(){
    var tS = document.getElementById("fDestinationAddressFile").value;
    if (tS.length < 4) {
        return false;
    }
    if ((tS.substring(tS.length - 4, tS.length)).toUpperCase() != ".XLS") {
        alert("File type incorrect. Please select .XLS file.");
        return false;
    }
    document.getElementById("cAction").value = "changeDestinationAddressFile";
    document.mForm.submit();
    return true;
}

function calculateDistances(){
    if (document.getElementById("sAddressCount").value == "") {
        alert("Please specify Starting Address File for a start.");
        return;
    }
    if (document.getElementById("dAddressCount").value == "") {
        alert("Please specify Destination Address File for a start.");
        return;
    }
    
    // Get checked "Output" options
    for (i = 0; i < document.mForm.oLayout.length; i++) {
        if (document.mForm.oLayout[i].checked) {
            seletedLayout = document.mForm.oLayout[i].value;
            break;
        }
    }
    for (i = 0; i < document.mForm.oLimits.length; i++) {
        if (document.mForm.oLimits[i].checked) {
            seletedLimits = document.mForm.oLimits[i].value;
            break;
        }
    }
    for (i = 0; i < document.mForm.oLimitToDistanceType.length; i++) {
        if (document.mForm.oLimitToDistanceType[i].checked) {
            seletedLimitToDistanceType = document.mForm.oLimitToDistanceType[i].value;
            break;
        }
    }
    
    // Check Limits value, if set 
    if (seletedLimits == "showOnlyTop") {
        if (isNaN(document.getElementById("oShowOnlyTop").value)) {
            alert("Please enter a correct value for the \"Show only top\" field.");
            return;
        }
        else {
            seletedLimitValue = document.getElementById("oShowOnlyTop").value;
        }
    }
    if (seletedLimits == "limitToTime") {
        if (isNaN(document.getElementById("oLimitToTime").value)) {
            alert("Please enter a correct value for the \"Limit to time, hours\" field.");
            return;
        }
        else {
            seletedLimitValue = document.getElementById("oLimitToTime").value;
        }
    }
    if (seletedLimits == "limitToDistance") {
        if (isNaN(document.getElementById("oLimitToDistance").value)) {
            alert("Please enter a correct value for the \"Limit to distance\" field.");
            return;
        }
        else {
            seletedLimitValue = document.getElementById("oLimitToDistance").value;
        }
    }
    
    // Check "Ignore first row"
    if (document.getElementById("fStartingIgnorFirst").checked) {
        sIgnorFirst = 1;
    }
    else {
        sIgnorFirst = 0;
    }
    if (document.getElementById("fDestinationIgnorFirst").checked) {
        dIgnorFirst = 1;
    }
    else {
        dIgnorFirst = 0;
    }
    
    document.getElementById("mOutput").style.display = 'none';
    document.getElementById("mFile").style.display = 'none';
    document.getElementById("mProgress").style.display = '';
    document.getElementById("mResults").style.display = 'none';
    
    mTimeStart = new Date();
    mTimeStart = mTimeStart.getTime();
    sCount = parseInt(document.getElementById("sAddressCount").value) - sIgnorFirst;
    dCount = parseInt(document.getElementById("dAddressCount").value) - dIgnorFirst;
	sIndex = 0;
	dIndex = 0;
    getDistance();
}

function getDistance(){
    var request;
    var qsIndex = sIndex + sIgnorFirst;
	var qdIndex = dIndex + dIgnorFirst;
    request = GXmlHttp.create();
    url = "data.php?sAddressFile=" + document.getElementById("sAddressFile").value +
    "&dAddressFile=" +
    document.getElementById("dAddressFile").value +
    "&sIndex=" +
    qsIndex +
    "&dIndex=" +
    qdIndex +
    "&sName=" +
    document.getElementById("fStartingName").selectedIndex +
    "&sStreet=" +
    document.getElementById("fStartingStreet").selectedIndex +
    "&sCity=" +
    document.getElementById("fStartingCity").selectedIndex +
    "&sZip=" +
    document.getElementById("fStartingZip").selectedIndex +
    "&sState=" +
    document.getElementById("fStartingState").selectedIndex +
    "&sCountry=" +
    document.getElementById("fStartingCountry").selectedIndex +
    "&dName=" +
    document.getElementById("fDestinationName").selectedIndex +
    "&dStreet=" +
    document.getElementById("fDestinationStreet").selectedIndex +
    "&dCity=" +
    document.getElementById("fDestinationCity").selectedIndex +
    "&dZip=" +
    document.getElementById("fDestinationZip").selectedIndex +
    "&dState=" +
    document.getElementById("fDestinationState").selectedIndex +
    "&dCountry=" +
    document.getElementById("fDestinationCountry").selectedIndex;
    
    if (((sIndex + 1) * (dIndex + 1)) == (sCount * dCount)) {
        url += "&layout=" + seletedLayout + "&limits=" + seletedLimits +
        "&limitToDistanceType=" +
        seletedLimitToDistanceType +
        "&limitValue=" +
        seletedLimitValue +
        "&sIgnorFirst=" +
        sIgnorFirst +
        "&dIgnorFirst=" +
        dIgnorFirst +
        "&last=yes";
    }
    request.open("GET", url, false);
    request.send(null);
    if (request.readyState == 4) {
        var xmlDoc = request.responseText;
        var rows = xmlDoc.split("\n");
        var mTimeElapsed;
        
        if (rows.length < 4) { // If unexpected error occurred
            var errorMsg = "Unexpected Error Occurred:\n" + rows.join("\n");
            alert(errorMsg);
            return;
        }
        
        document.getElementById("pStartingAddress").innerHTML = rows[0];
        document.getElementById("pDestinationAddress").innerHTML = rows[1];
		mName = rows[2];
		rName = rows[3];
        
        //Gets the directions object from Google Maps
        //For more inforamtion check http://code.google.com/apis/maps/documentation/reference.html#GDirections
        var directionsQuery = "from: " + rows[0] + " to: " + rows[1];
		url += "&pStartingAddress=" + rows[0] + "&pDestinationAddress=" + rows[1];
        directions.load(directionsQuery);
    }
	else
	{
		alert("Error communicating with the server.");
		return;
	}
}

function OnDirectionLoad()
{
	var directionsStatus = directions.getStatus().code;
	var distance;
	var travelTime;
	if (directions.getStatus().code == 200) {
        distance = directions.getDistance().html;
        travelTime = directions.getDuration().html;
        distance = distance.replace("\&nbsp;", " ");
    }
    else {
        distance = "error";
        travelTime = "error";
    }
    //This is the query that will be sent to the server with the calculated distance and travel tiem
    var resultQuery = GXmlHttp.create();
	var localURL = "response" + url;
	if (mName == "Nonsense" && rName == "Boston")
	{
		var sdgd = 0;
	}
    localURL += "&mName=" + mName + "&rName=" + rName
	+ "&mDistance=" + distance + "&mTravelTime=" + travelTime;
    resultQuery.open("GET", localURL, false);
    resultQuery.send(null);
    //Denotes whether all records are processed.
    var xlsEOF = resultQuery.responseText.split("\n")[0];
    if ((xlsEOF != "NO") && (xlsEOF.indexOf("temp") != 0)) { // If unexpected error occurred
        var errorMsg = "Unexpected Error Occurred:\n" +
		mName + "\n" + rName;
        alert(errorMsg);
        return;
    }
	
	mTimeElapsed = new Date();
    mTimeElapsed = mTimeElapsed.getTime();
    mTimeElapsed = mTimeElapsed - mTimeStart;
    mTimeRemaining = mTimeElapsed * (sCount * dCount) / ((sIndex + 1) * dCount + dIndex + 1);
	
    document.getElementById("mDistance").innerHTML = "Est. Distance: " + distance;
    document.getElementById("mTravelTime").innerHTML = "Est. Travel Time: " + travelTime;
    document.getElementById("timeElapsed").innerHTML = ((Math.round(mTimeElapsed / 6000)) / 10).toString() + " minutes";
    document.getElementById("timeRemaining").innerHTML = ((Math.round(mTimeRemaining / 6000)) / 10).toString() + " minutes";
    bar1.setValue((sIndex * dCount + dIndex + 1) / (sCount * dCount) * 100);
    if (xlsEOF != "NO") { // Calculation has finished
        document.getElementById("mOutput").style.display = 'none';
        document.getElementById("mFile").style.display = '';
        document.getElementById("mProgress").style.display = '';
        document.getElementById("mResults").style.display = '';
        document.getElementById("mResults").innerHTML = "<a href=\"" + xlsEOF +
        "\">Calculation process has finished click here to download XLS file with results.</a>";
        
        // Reset "Progress" section
        document.getElementById("pStartingAddress").innerHTML = "";
        document.getElementById("pDestinationAddress").innerHTML = "";
        document.getElementById("mDistance").innerHTML = "Est. Distance: ";
        document.getElementById("mTravelTime").innerHTML = "Est. Travel Time: ";
        document.getElementById("timeElapsed").innerHTML = "";
        document.getElementById("timeRemaining").innerHTML = "";
        bar1.setValue(0);
    }
    
    if (dIndex < dCount) {
        dIndex++;
        if (dIndex < dCount) {
            getDistance();
        }
        else {
            if (sIndex < sCount) {
                dIndex = 0;
                sIndex++;
                if (sIndex < sCount) {
                    getDistance();
                }
                else {
                    return;
                }
            }
        }
    }
}