private static void ChargeForBillableHours(ref Charge charge, Bill bill, float amRate, float pmRate)
{
var chargeOverlap = false;
var dayOverlap = false;
for (var date = bill.EntryDate; date < bill.LeaveDate; date = date.AddHours(1))
{
if (date.IsWeekend() || date.IsFreeOfCharge())
{
dayOverlap = true;
continue;
}
var epsilon = 60f;
if ((bill.LeaveDate - date).TotalHours < 1)
epsilon = (float)(bill.LeaveDate - date).TotalMinutes;
TimeSpan overlap;
TimeSpan margin;
if (date.InAmRate())
{
overlap = (date.TimeOfDay - TimeSpan.FromHours(7));
if (overlap.TotalHours < 1 && dayOverlap)
{
epsilon += (float) overlap.TotalMinutes;
dayOverlap = false;
}
margin = TimeSpan.FromHours(12) - date.TimeOfDay;
if (margin.TotalHours < 1)
{
epsilon = (float) margin.TotalMinutes;
chargeOverlap = true;
}
charge.AmRateSpan = charge.AmRateSpan.Add(TimeSpan.FromMinutes(epsilon));
charge.AmRateCharge += (amRate*(epsilon/60f));
}
if (date.InPmRate())
{
overlap = date.TimeOfDay - TimeSpan.FromHours(12);
if (overlap.TotalHours < 1 && chargeOverlap)
{
epsilon += (float) overlap.TotalMinutes;
chargeOverlap = false;
}
margin = TimeSpan.FromHours(19) - date.TimeOfDay;
if (margin.TotalHours < 1)
epsilon = (float) margin.TotalMinutes;
charge.PmRateSpan = charge.PmRateSpan.Add(TimeSpan.FromMinutes(epsilon));
charge.PmRateCharge += (pmRate*(epsilon/60f));
}
}
}
public static Charge Charge(Bill bill)
{
var charge = new Charge();
var amRate = 0f;
var pmRate = 0f;
switch (bill.Vehicle)
{
case Vehicle.Motorbike:
amRate = pmRate = 1f;
break;
case Vehicle.Car:
case Vehicle.Van:
amRate = 2f;
pmRate = 2.5f;
break;
}
ChargeForBillableHours(ref charge, bill, amRate, pmRate);
return charge;
}
