public override void Execute(params string[] commandParams)
{
int numberOfUnits = int.Parse(commandParams[0]);
if (numberOfUnits < 0)
{
throw new ArgumentOutOfRangeException("Number of units should be non-negative");
}
string cityName = commandParams[2];
var city = this.Engine.Continent.GetCityByName(cityName);
if (city == null)
{
throw new ArgumentNullException();
}
string unitType = commandParams[1];
var factory = new UnitFactory();
var units = factory.CreateUnits(unitType, numberOfUnits);
if (city.AvailableUnitCapacity(units.First().Type) <
units.Sum(u => u.HousingSpacesRequired))
{
throw new InvalidOperationException(string.Format(
"City {0} does not have enough housing spaces to accommodate {1}" +
" units of {2}",
cityName,
numberOfUnits,
unitType));
}
if (city.ControllingHouse.TreasuryAmount < units.Sum(u => u.TrainingCost))
{
throw new InvalidOperationException(string.Format(
"House {0} does not have enough funds to train {1} units of {2}",
city.ControllingHouse.Name,
numberOfUnits,
unitType));
}
city.AddUnits(units);
city.ControllingHouse.TreasuryAmount -= units.Sum(u => u.TrainingCost);
this.Engine.Render(
"Successfully added {0} units of {1} to city {2}",
numberOfUnits,
unitType,
cityName);
}