private static ulong CalculateConsumption(InvoiceShared prevInvoice, InvoiceShared invoice,
IEnumerable <MeterConfig> mainMeterConfigHistory, IEnumerable <UserMeterConfigHistory> userMeterConfigHistory)
{
Contract.Requires(invoice != null);
DateRange readOutPeriod = InvoiceExtensions.GetReadOutPeriod(prevInvoice, invoice);
IEnumerable <MeterConfig> meterConfigs = mainMeterConfigHistory.GetMeterConfigHistoryForPeriod(readOutPeriod);
ulong realCommonConsumption = CalculateRealCommonConsumption(prevInvoice, invoice, meterConfigs);
ulong estimatedCommonConsumption = CalculateEstimatedCommonConsumption(prevInvoice, invoice, meterConfigs);
ulong totalEstimatedUserConsumption = 0U;
foreach (var userInvoice in invoice.UserInvoices)
{
UserInvoice prevUserInvoice = prevInvoice?.UserInvoices.GetInvoiceByOwner(userInvoice.InvoiceOwner);
IEnumerable <MeterConfig> userMeterConfigs = userMeterConfigHistory.
GetMeterConfigHistoryByOwner(userInvoice.InvoiceOwner).
GetMeterConfigHistoryForPeriod(readOutPeriod);
ulong realUserConsumption = CalculateRealUserConsumption(readOutPeriod, prevUserInvoice, userInvoice, userMeterConfigs);
totalEstimatedUserConsumption +=
CalculateEstimatedUserConsumption(userInvoice, realUserConsumption, new ConsumptionValue(estimatedCommonConsumption, realCommonConsumption));
}
FineGrainEstimatedUserConsumption(
invoice.UserInvoices,
totalEstimatedUserConsumption,
new ConsumptionValue(estimatedCommonConsumption, realCommonConsumption)
);
return(realCommonConsumption);
}
private static ulong CalculateRealCommonConsumption(InvoiceShared prevInvoice, InvoiceShared invoice, IEnumerable <MeterConfig> meterConfigs)
{
Contract.Requires(invoice != null);
Contract.Requires(meterConfigs != null);
DateRange readOutPeriod = InvoiceExtensions.GetReadOutPeriod(prevInvoice, invoice);
ulong startRealReadOut = prevInvoice?.GetReadOut().Real ?? 0U;
ulong endRealReadOut = invoice.GetReadOut().Real;
ulong commonRealConsumption = CalculateConsumption(readOutPeriod, startRealReadOut, endRealReadOut, meterConfigs);
invoice.GetConsumption().Real = commonRealConsumption;
return(commonRealConsumption);
}
private static ulong CalculateEstimatedCommonConsumption(InvoiceShared prevInvoice, InvoiceShared invoice, IEnumerable <MeterConfig> meterConfigs)
{
Contract.Requires(invoice != null);
Contract.Requires(meterConfigs != null);
DateRange readOutPeriod = InvoiceExtensions.GetReadOutPeriod(prevInvoice, invoice);
ulong commonEstimatedConsumption = invoice.GetConsumption().Estimated;
if (commonEstimatedConsumption == 0)
{
ulong startEstimatedReadOut = prevInvoice?.GetReadOut().Estimated ?? 0U;
ulong endEstimatedReadOut = invoice.GetReadOut().Estimated;
commonEstimatedConsumption = CalculateConsumption(readOutPeriod, startEstimatedReadOut, endEstimatedReadOut, meterConfigs);
invoice.GetConsumption().Estimated = commonEstimatedConsumption;
}
return(commonEstimatedConsumption);
}
/// <summary>
/// Calculates the custom total.
/// </summary>
/// <param name="itemization">
/// The itemization.
/// </param>
/// <returns>
/// The <see cref="decimal"/>.
/// </returns>
public static decimal CalculateCustomTotal(this InvoiceItemItemization itemization)
{
return(InvoiceExtensions.Ensure2Places(itemization.Custom.Sum(x => x.Price * x.Quantity)));
}
