var lifeExpectency = {
	'male' : {
		  0 : 79.34,
		  1 : 78.75,
		  2 : 77.78,
		  3 : 76.80,
		  4 : 75.81,
		  5 : 74.83,
		  6 : 73.84,
		  7 : 72.85,
		  8 : 71.85,
		  9 : 70.86,
		 10 : 69.86,
		 11 : 68.87,
		 12 : 67.87,
		 13 : 66.88,
		 14 : 65.90,
		 15 : 64.92,
		 16 : 63.94,
		 17 : 62.98,
		 18 : 62.02,
		 19 : 61.07,
		 20 : 60.13,
		 21 : 59.19,
		 22 : 58.24,
		 23 : 57.30,
		 24 : 56.35,
		 25 : 55.39,
		 26 : 54.44,
		 27 : 53.47,
		 28 : 52.51,
		 29 : 51.55,
		 30 : 50.58,
		 31 : 49.62,
		 32 : 48.65,
		 33 : 47.69,
		 34 : 46.73,
		 35 : 45.77,
		 36 : 44.82,
		 37 : 43.86,
		 38 : 42.91,
		 39 : 41.97,
		 40 : 41.02,
		 41 : 40.08,
		 42 : 39.14,
		 43 : 38.20,
		 44 : 37.26,
		 45 : 36.33,
		 46 : 35.41,
		 47 : 34.48,
		 48 : 33.56,
		 49 : 32.65,
		 50 : 31.74,
		 51 : 30.83,
		 52 : 29.93,
		 53 : 29.04,
		 54 : 28.15,
		 55 : 27.27,
		 56 : 26.39,
		 57 : 25.52,
		 58 : 24.66,
		 59 : 23.80,
		 60 : 22.96,
		 61 : 22.11,
		 62 : 21.28,
		 63 : 20.46,
		 64 : 19.64,
		 65 : 18.84,
		 66 : 18.05,
		 67 : 17.27,
		 68 : 16.50,
		 69 : 15.74,
		 70 : 15.00,
		 71 : 14.28,
		 72 : 13.56,
		 73 : 12.87,
		 74 : 12.18,
		 75 : 11.52,
		 76 : 10.87,
		 77 : 10.24,
		 78 :  9.63,
		 79 :  9.03,
		 80 :  8.46,
		 81 :  7.91,
		 82 :  7.38,
		 83 :  6.87,
		 84 :  6.40,
		 85 :  5.95,
		 86 :  5.53,
		 87 :  5.14,
		 88 :  4.77,
		 89 :  4.44,
		 90 :  4.13,
		 91 :  3.83,
		 92 :  3.55,
		 93 :  3.29,
		 94 :  3.04,
		 95 :  2.82,
		 96 :  2.61,
		 97 :  2.41,
		 98 :  2.24,
		 99 :  2.08,
		100 :  1.93,
		101 :  1.80,
		102 :  1.68,
		103 :  1.58,
		104 :  1.49,
		105 :  1.40		
	},
	'female' : {
		  0 : 83.01,
		  1 : 82.34,
		  2 : 81.37,
		  3 : 80.39,
		  4 : 79.40,
		  5 : 78.41,
		  6 : 77.42,
		  7 : 76.42,
		  8 : 75.43,
		  9 : 74.43,
		 10 : 73.44,
		 11 : 72.44,
		 12 : 71.45,
		 13 : 70.45,
		 14 : 69.47,
		 15 : 68.48,
		 16 : 67.50,
		 17 : 66.52,
		 18 : 65.54,
		 19 : 64.56,
		 20 : 63.59,
		 21 : 62.61,
		 22 : 61.64,
		 23 : 60.66,
		 24 : 59.68,
		 25 : 58.70,
		 26 : 57.72,
		 27 : 56.75,
		 28 : 55.77,
		 29 : 54.79,
		 30 : 53.81,
		 31 : 52.83,
		 32 : 51.86,
		 33 : 50.88,
		 34 : 49.91,
		 35 : 48.94,
		 36 : 47.97,
		 37 : 47.00,
		 38 : 46.03,
		 39 : 45.07,
		 40 : 44.11,
		 41 : 43.15,
		 42 : 42.19,
		 43 : 41.23,
		 44 : 40.28,
		 45 : 39.33,
		 46 : 38.39,
		 47 : 37.45,
		 48 : 36.51,
		 49 : 35.58,
		 50 : 34.65,
		 51 : 33.73,
		 52 : 32.80,
		 53 : 31.88,
		 54 : 30.97,
		 55 : 30.05,
		 56 : 29.14,
		 57 : 28.24,
		 58 : 27.34,
		 59 : 26.44,
		 60 : 25.55,
		 61 : 24.67,
		 62 : 23.79,
		 63 : 22.93,
		 64 : 22.07,
		 65 : 21.22,
		 66 : 20.39,
		 67 : 19.56,
		 68 : 18.74,
		 69 : 17.93,
		 70 : 17.13,
		 71 : 16.34,
		 72 : 15.56,
		 73 : 14.79,
		 74 : 14.03,
		 75 : 13.29,
		 76 : 12.55,
		 77 : 11.84,
		 78 : 11.13,
		 79 : 10.45,
		 80 :  9.79,
		 81 :  9.14,
		 82 :  8.52,
		 83 :  7.92,
		 84 :  7.35,
		 85 :  6.81,
		 86 :  6.31,
		 87 :  5.83,
		 88 :  5.39,
		 89 :  4.97,
		 90 :  4.58,
		 91 :  4.22,
		 92 :  3.87,
		 93 :  3.56,
		 94 :  3.27,
		 95 :  3.00,
		 96 :  2.76,
		 97 :  2.54,
		 98 :  2.34,
		 99 :  2.17,
		100 :  2.01,
		101 :  1.86,
		102 :  1.74,
		103 :  1.62,
		104 :  1.52,
		105 :  1.42		
	}
};

function pmt(rate, nper, pv, fv, type) {
	var pmt;
	fv = fv ? fv : 0;
	type = type ? type : 0;
	
	if(rate == 0) {
		pmt = (pv + fv) / nper;
	}
	else {
		pmt = (pv * Math.pow((1 + rate), nper) + fv) / ((1 + rate * type) * ( Math.pow((1 + rate), nper) - 1) / rate);
	}
	
	return Math.round((pmt * -1) * 100) / 100;
}

$(function() {
	
	$('#resident_last_5').bind('click', function() {
		//$('input[type=checkbox][name=resident_last_5]').is(':checked')
		$('#exchange-rate-wrapper').toggle();
	});
	
	
	$('input[type=submit][name=calculate]').bind('click', function() {
		
		var gender = $('select[name=gender]').val();
		var age = $('select[name=age]').val();
		var frequency = $('select[name=frequency]').val();
		var fund_amount = $('input[type=text][name=fund_amount]').val();
		
			
		if($('input[type=checkbox][name=resident_last_5]').is(':checked')) {
			
			var exchange_rate = $('input[type=text][name= exchange_rate]').val();		
			var rate = $('input[type=hidden][name= rate]').val();
				
			// Clean up user entered fund amount
			fund_amount = fund_amount.replace(/[^\d.]/g, '');
			fund_amount = Math.round(fund_amount * 100) / 100;
			$('input[type=text][name=fund_amount]').val(parseFloat(fund_amount).toFixed(2));
			
			exchange_rate = Math.round(exchange_rate * 10000) / 10000;
			exchange_rate = parseFloat(exchange_rate).toFixed(4)
			$('input[type=text][name=exchange_rate]').val(exchange_rate);
			
			if(!gender.length || !age.length || !frequency.length || fund_amount == 0 || exchange_rate == 0 || !$('input[type=checkbox][name=resident_last_5]').is(':checked')) {
				// Form incomplete
				alert('Please complete all fields');
				return false;
			}
			
			$.ajax({
			  dataType: "json",
			  type: "POST",
			  url: 'calculator/calculator.v2.js',
			  data: {
			  	rate: rate,
			    gender: gender,
			    age: age,
			    frequency: frequency,
			    fund_amount: fund_amount,
			    exchange_rate: exchange_rate
			  },
			  success: function(data){
			    $('input[type=text][name=result_minimum]').val(data.min_amount);
			    $('input[type=text][name=result]').val(data.base_amount);
			    $('input[type=text][name=result_maximum]').val(data.max_amount);
			  },
			  error: function(){
			    alert('There was a problem during the calculation');
			  },
			});
			
		} else {
			
			var rate = 0.036; // 10-year bond rate
			var nper = 0; // Remaining life expectency
			var pv = 0; // Fund amount entered by user
			var fv = 0; // Always be zero
			var type = 1; // Payments will always be in advance
			var result = 0; // What we need to work out!
			
			// Clean up user entered fund amount
			fund_amount = fund_amount.replace(/[^\d.]/g, '');
			fund_amount = Math.round(fund_amount * 100) / 100;
			$('input[type=text][name=fund_amount]').val(parseFloat(fund_amount).toFixed(2));
			
			if(!gender.length || !age.length || !frequency.length) {
				// Form incomplete
				return false;
			}
			
			if(!lifeExpectency[gender][age]) {
				// Unable to source remaining life expectency
				window.alert('Unable to source remaining life expectency');
				return false;
			}
			
			nper = Math.round(lifeExpectency[gender][age] * 100) / 100;
			pv = fund_amount;
			
			// Adjust rate and nper to suit frequency
			switch(frequency.toLowerCase()) {
				case 'monthly':
					rate = rate / 12;
					nper = nper * 12;
					break;
				case 'quarterly':
					rate = rate / 4;
					nper = nper * 4;
					break;
				case 'six_monthly':
					rate = rate / 2;
					nper = nper * 2;
					break;
				case 'annually':
					// Nothing required
					break;
			}
			
			result = pmt(rate, nper, pv, fv, type) * -1;
			
			result = Math.round(result * 100) / 100;
			if($('input[type=text][name=result_minimum]')) {
				$('input[type=text][name=result_minimum]').val(parseFloat(result * 0).toFixed(2));
			}
			if($('input[type=text][name=result]')) {
				$('input[type=text][name=result]').val(parseFloat(result).toFixed(2));
			}
			if($('input[type=text][name=result_maximum]')) {
				$('input[type=text][name=result_maximum]').val(parseFloat(result * 1.5).toFixed(2));
			}
		}
		
		
		return false;
	});
});