private decimal TryFindProductionOrders(IDemandToProvider demand, decimal amount)
{
var possibleMatchingProductionOrders = _context.ProductionOrders.Where(a => a.ArticleId == demand.ArticleId && a.ProductionOrderWorkSchedule.Any(b => b.ProducingState != ProducingState.Finished)).ToList();
while (amount > 0 && possibleMatchingProductionOrders.Any())
{
var earliestProductionOrder = _context.GetEarliestProductionOrder(possibleMatchingProductionOrders);
var availableAmountFromProductionOrder = _context.GetAvailableAmountFromProductionOrder(earliestProductionOrder);
if (availableAmountFromProductionOrder == 0)
{
possibleMatchingProductionOrders.Remove(possibleMatchingProductionOrders.Find(a => a.Id == earliestProductionOrder.Id));
continue;
}
var provider = _context.CreateProviderProductionOrder(demand, earliestProductionOrder, amount >= availableAmountFromProductionOrder ? availableAmountFromProductionOrder : amount);
var duetime = _context.GetDueTimeByOrder(demand);
if (provider.ProductionOrder.DemandProviderProductionOrders.Count == 1)
{
provider.ProductionOrder.Duetime = duetime;
}
else if (provider.ProductionOrder.Duetime > duetime)
{
provider.ProductionOrder.Duetime = duetime;
}
_context.AssignProviderToDemand(demand, provider);
_context.AssignProductionOrderToDemandProvider(earliestProductionOrder, provider);
if (amount > availableAmountFromProductionOrder)
{
amount -= availableAmountFromProductionOrder;
}
else
{
amount = 0;
}
possibleMatchingProductionOrders.ToList().Remove(earliestProductionOrder);
}
return(amount);
}