private IEnumerable <Choice> Choice_CastSpell()
{
var choices = new List <Choice>();
// 301.1. A player who has priority may cast an artifact card from his or her hand
// during a main phase of his or her turn when the stack is empty. Casting an artifact
// as a spell uses the stack. (See rule 601, "Casting Spells.")
// 302.1. A player who has priority may cast a creature card from his or her hand
// during a main phase of his or her turn when the stack is empty. Casting a creature
// as a spell uses the stack. (See rule 601, "Casting Spells.")
// 303.1. A player who has priority may cast an enchantment card from his or her hand
// during a main phase of his or her turn when the stack is empty. Casting an enchantment
// as a spell uses the stack. (See rule 601, "Casting Spells.")
// 306.1. A player who has priority may cast a planeswalker card from his or her hand
// during a main phase of his or her turn when the stack is empty. Casting a planeswalker
// as a spell uses the stack. (See rule 601, "Casting Spells.")
// 307.1. A player who has priority may cast a sorcery card from his or her hand
// during a main phase of his or her turn when the stack is empty. Casting a sorcery
// as a spell uses the stack. (See rule 601, "Casting Spells.")
var canCastNonInstants = (_gs.Phase == Phase.PreCombatMain || _gs.Phase == Phase.PostCombatMain) &&
_gs.Stack.Empty &&
_gs.Priority == _gs.Active;
var activeIndex = _gs.Players.IndexOf(_gs.Active);
var nonInstantTypes = new CardType[] { CardType.Artifact, CardType.Creature, CardType.Enchantment,
CardType.Planeswalker, CardType.Sorcery };
if (canCastNonInstants)
{
_gs.Hands[activeIndex]
.Objects
.Where(c => c.CardTypes.Any(ct => nonInstantTypes.Contains(ct)))
.ForEach(c => choices.Add(new PlayCardChoice(_gs.Active, c)));
}
// 304.1. A player who has priority may cast an instant card from his or her hand.
// Casting an instant as a spell uses the stack. (See rule 601, "Casting Spells.")
_gs.Hands[activeIndex]
.Objects
.Where(c => c.CardTypes.Contains(CardType.Instant))
.ForEach(c => choices.Add(new PlayCardChoice(_gs.Active, c)));
return(choices);
}
