private static Option <ICommand> CastSpell(Player player, int spellnum, Spell.ISpell spell)
{
int mainMana = spell.Cost.MainManaUsed();
int altMana = spell.Cost.AltManaUsed();
int minMainCost = spell.Cost.MainCost.Item1;
int minAltCost = spell.Cost.AltCost.Item1;
if (mainMana < minMainCost || mainMana < minAltCost)
{
Game.MessagePanel.AddMessage("Not enough mana");
return(Option.None <ICommand>());
}
if (spell.Instant)
{
// TODO: multi-hitting instants
return(spell.Zone.GetAllValidTargets(player.Pos)
.Random(Game.Rand)
.FlatMap(cursor =>
{
IEnumerable <Loc> targets = spell.Zone.GetTilesInRange(player.Pos, cursor);
PaySpellCost(player, spell, mainMana, altMana);
return Option.Some(spell.Evoke(player, targets, (mainMana, altMana)));
}));
}
else
{
Game.StateHandler.PushState(
new TargettingState(player, spell.Zone, spellnum, targets =>
{
if (!targets.Any())
{
return(Option.None <ICommand>());
}
PaySpellCost(player, spell, mainMana, altMana);
Game.StateHandler.PopState();
return(Option.Some(spell.Evoke(player, targets, (mainMana, altMana))));
}));
