//How much can I borrow Calculator

//Variables

// Current Loan
var loan_min = 25000;
var loan_max = 900000;
var loan_initial = 100000;
var current_loan_value = loan_initial;
var loanValues = null;

// deposit
var deposit_min = 100;
var deposit_max = 250000;
var deposit_initial = 10000;
var current_deposit_value = deposit_initial;
var depositValues = null;

//Current Rate
var rate_min = 0.25;
var rate_max = 10;
var rate_initial = 4.5;
var current_rate_value = rate_initial;
var rateValues = null;

//Overpayments
var overpay_min = 10;
var overpay_max = 5000;
var overpay_initial = 50;
var current_overpay_value = overpay_initial;
var overpayValues = null;




//Only call the function when you need to - on mouse up
var cancelAjax = true;


// Set Inital Values and create slider Arrays

function InitializeHowMuchCanIBorrowCalculator()
{   

    // loan slider values
    loanValues = CreateSliderValues(new Array(), loan_min, 25000, 1000);
    loanValues = CreateSliderValues(loanValues, 26000, loan_max, 1000);

    // deposit  values
    depositValues = CreateSliderValues(new Array(), deposit_min, 100000, 1000);
    depositValues = CreateSliderValues(depositValues, 100000, deposit_max, 10000);
	
    // rate  values
    rateValues = CreateRSliderValues(new Array(), rate_min, rate_max);
	
	  // overpay slider values
    overpayValues = CreateSliderValues(new Array(), overpay_min, 200, 10);
    overpayValues = CreateSliderValues(overpayValues, 210, overpay_max, 50);

    // loan slider
    $('#loanTrack').slider({
        min: 0,
        max: loanValues.length - 1,
        steps: loanValues.length,
        change: function(e, ui)
		
        {
            current_loan_value = loanValues[ui.value]; recalmpay=1;
            ShowResult();
        },
        slide: function(e, ui)
        {
            $('#loanTextInput').val(loanValues[ui.value]);
        }
    });

    // deposit slider
    $('#depositTrack').slider({
        min: 0,
        max: depositValues.length - 1,
		
        steps: depositValues.length,
        change: function(e, ui)
        {
            current_deposit_value = depositValues[ui.value]; recalmpay=1;
            ShowResult();
        },
        slide: function(e, ui)
        {
            $('#depositTextInput').val(depositValues[ui.value]);
        }
    });
	
	  
    
    // rate slider
    $('#rateTrack').slider({
        min: 0,
        max: rateValues.length - 1,
        steps: rateValues.length,
        change: function(e, ui)
        {
            current_rate_value = rateValues[ui.value]; recalmpay=1;
            ShowResult();
        },


        slide: function(e, ui)
        {
            $('#rateTextInput').val(rateValues[ui.value]);
        }
    });
	
	   // overpay slider
    $('#overpayTrack').slider({
        min: 0,
        max: overpayValues.length - 1,
        steps: overpayValues.length,
        change: function(e, ui)
        {
            current_overpay_value = overpayValues[ui.value]; recalmpay=1;
            ShowResult();
        },


        slide: function(e, ui)
        {
            $('#overpayTextInput').val(overpayValues[ui.value]);
        }
    });
	

   
   
    $('#loanTextInput').change(function(eventArgs) { return handleKeyPress(eventArgs, loanValues, 'loanTrack'); });
    $('#loanTextInput').val(current_loan_value);
	
    $('#rateTextInput').change(function(eventArgs) { return handleKeyPress(eventArgs, rateValues, 'rateTrack'); });
    $('#rateTextInput').val(current_rate_value);
	
	$('#depositTextInput').change(function(eventArgs) { return handleKeyPress(eventArgs, depositValues, 'depositTrack'); } );
    $('#depositTextInput').val(current_deposit_value);
	
	$('#overpayTextInput').change(function(eventArgs) { return handleKeyPress(eventArgs, overpayValues, 'overpayTrack'); } );
    $('#overpayTextInput').val(current_overpay_value);
	
    $('#loanTrack').slider("value", FindValueIndex(loanValues, current_loan_value));
	$('#depositTrack').slider("value", FindValueIndex(depositValues, current_deposit_value));
	$('#rateTrack').slider("value", FindValueIndex(rateValues, current_rate_value));
$('#overpayTrack').slider("value", FindValueIndex(overpayValues, current_overpay_value));
    
	// setting this to false will trigget the ajax call
	cancelAjax = false;
    
}

function handleKeyPress(eventArgs, valuesArr, trackId)
{
//    if (eventArgs.keyCode == 13)
//    {
        var v = parseFloat($(eventArgs.target).val());

        // is it a number?
        if (isNaN(v))
        {
            alert('Sorry, the amount is invalid.');
            return false;
        }
        else
        {
            var sliderIdx = FindValueIndex(valuesArr, v);

            if (!isNaN(sliderIdx))
            {
                // cancel this ajax request - we'll call it later on
                cancelAjax = true;
                $('#' + trackId).slider("value", sliderIdx);
                cancelAjax = false;
            }
            else
            {
                alert('Please enter a value higher than ' + valuesArr[0] + ' and lower than ' + valuesArr[valuesArr.length - 1] + '.');
                return false;
            }
        }

        $(eventArgs.target).val(v);

       
		
		
        ShowResult(); // calling the ajax request here will send the correct "current" values
        //return false;
 
}

function floor(number) {
return Math.floor(number*Math.pow(10,2))/Math.pow(10,2);
}

function ShowResult()
{

// don't keep doing it, honestly, everything will go crazy.  
    if (cancelAjax) { return; }    
	

//declare variables

var balance = document.getElementById("depositTextInput").value;
var growth = document.getElementById("rateTextInput").value;
var deposit = document.getElementById("loanTextInput").value;
var monthlyinvestment = document.getElementById("overpayTextInput").value;
var monthlyinterest = Number(growth)/1200;
var months = 0;
var yr=0;
var result = ""

if (isNaN(balance) || isNaN(growth) || isNaN(deposit) || isNaN(monthlyinvestment)) {alert('Please insert only numbers')
} else 
//whilst we haven't yet hit the required amount, keep going in months
{
if (Number(document.getElementById("depositTextInput").value) < Number(document.getElementById("loanTextInput").value) ) 
	{

while (balance < deposit) 
		{
			var lastbalance = balance;
			if (months < 12)
				{
					balance = Number(balance) + (Number(balance)*monthlyinterest) + Number(monthlyinvestment);
					months++;
				} 
			else 	
				{
					yr++;
					result = "\nYear " + yr + " : " + floor(balance);
					months=1;
					var prev_m_yr = yr;
					var prev_month = 1
					
				};
		};

		yr++;

		if (isNaN(balance))
		{
			alert('Please insert numbers only');
		}
		else
		{
			if (months!=1)
			{
				var prev_m_yr = yr;
				var prev_month = months;
				result =  prev_m_yr + " Years and "   + prev_month + " months. ";
			}
		}
	}
}

	


	document.getElementById("years").innerHTML = prev_m_yr
	document.getElementById("months").innerHTML = prev_month
	document.getElementById('resultPane').style.display = "block";



}



$(document).ready(InitializeHowMuchCanIBorrowCalculator);