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use super::EffectContext;
use crate::ids::CardId;
use crate::parsing::keys;
use crate::replacement::replacement_handler::{apply_replacements, ReplacementEvent};
use crate::replacement::ReplacementResult;
use crate::spellability::SpellAbilityMode;
/// Mirrors Java's `SetStateEffect.java`.
///
/// `DB$ SetState | Defined$ Self | Mode$ Transform`
///
/// Optionally gated by:
/// `ConditionDefined$ Remembered | ConditionPresent$ Card.Instant,Card.Sorcery | ConditionCompare$ EQ1`
///
/// If the condition passes, transforms the source DFC card to its other face.
/// Struct form of this effect so it can participate in the
/// `SpellAbilityEffect` trait hierarchy — mirrors Java's
/// `SetStateEffect` class extending `SpellAbilityEffect`.
#[manabrew_engine_macros::spell_effect(SetStateEffect)]
fn resolve(ctx: &mut EffectContext, sa: &crate::spellability::SpellAbility) {
let mode = sa.ir.mode.as_ref();
let source_id = match sa.source {
Some(id) => id,
None => return,
};
match mode {
Some(SpellAbilityMode::Transform) => {
// Evaluate optional condition.
if let Some(cond_defined) = sa.ir.condition_defined.as_ref() {
if cond_defined.refs.first().is_some_and(|defined| {
matches!(defined, crate::ability::ability_ir::DefinedRef::Remembered)
}) {
let cond_present = sa.ir.condition_present.clone().unwrap_or_default();
let cond_compare = sa.ir.condition_compare.clone().unwrap_or_default();
let remembered: Vec<CardId> = ctx.game.card(source_id).remembered_cards.clone();
let match_count = remembered
.iter()
.filter(|&&cid| matches_type_filter(ctx, cid, &cond_present))
.count();
if !evaluate_compare(&cond_compare, match_count) {
return; // Condition not met.
}
}
}
// Run Transform replacement effects before transforming.
let mut transform_event = ReplacementEvent::Transform { card: source_id };
let transform_result = apply_replacements(ctx.game, &mut transform_event);
if transform_result == ReplacementResult::Skipped
|| transform_result == ReplacementResult::Replaced
{
return;
}
// Perform the transform.
ctx.game.card_mut(source_id).transform();
// Fire Transformed trigger
ctx.trigger_handler.run_trigger(
crate::trigger::TriggerType::Transformed,
crate::event::RunParams {
card: Some(source_id),
..Default::default()
},
false,
);
// Re-scan active triggers so the new face's trigger list takes effect.
ctx.trigger_handler.reset_active_triggers(ctx.game);
}
Some(SpellAbilityMode::Flip) => {
// Toggle the flipped state.
let card = ctx.game.card_mut(source_id);
card.set_flipped(!card.flipped);
}
Some(SpellAbilityMode::TurnFaceUp) => {
// Run TurnFaceUp replacement effects before turning face up.
let mut faceup_event = ReplacementEvent::TurnFaceUp { card: source_id };
let faceup_result = apply_replacements(ctx.game, &mut faceup_event);
if faceup_result == ReplacementResult::Skipped
|| faceup_result == ReplacementResult::Replaced
{
return;
}
let card = ctx.game.card_mut(source_id);
if card.face_down {
card.set_face_down(false);
// Restore original P/T by clearing the face-down overrides
card.set_static_set_pt(None, None);
// Remove the synthetic morph turn-face-up ability
card.activated_abilities
.retain(|ab| !ab.ability_text.contains("Mode$ TurnFaceUp"));
// Megamorph: add a +1/+1 counter when turning face-up
if sa.param_is_true(keys::MEGA) {
ctx.add_counter(
source_id,
&crate::card::CounterType::P1P1,
1,
sa,
crate::event::RunParams::default(),
);
}
// Fire TurnFaceUp trigger
ctx.trigger_handler.run_trigger(
crate::trigger::TriggerType::TurnFaceUp,
crate::event::RunParams {
card: Some(source_id),
..Default::default()
},
false,
);
// Re-scan active triggers for the revealed card
ctx.trigger_handler.reset_active_triggers(ctx.game);
}
}
Some(SpellAbilityMode::TurnFaceDown) => {
let card = ctx.game.card_mut(source_id);
if !card.face_down {
card.set_face_down(true);
}
}
_ => {
let err = crate::ability::IllegalAbilityException::new(format!(
"Unknown SetState mode: {:?}",
mode.map(ToString::to_string)
));
eprintln!("{err}");
}
}
}
/// Check if a card matches a comma-separated type filter (OR semantics).
/// E.g. `"Card.Instant,Card.Sorcery"` → true if the card is an Instant or Sorcery.
fn matches_type_filter(ctx: &EffectContext, card_id: CardId, filter: &str) -> bool {
if filter.is_empty() {
return true;
}
for part in filter.split(',') {
let type_name = part.trim().strip_prefix("Card.").unwrap_or(part.trim());
let card = ctx.game.card(card_id);
if card
.type_line
.core_types
.iter()
.any(|t| t.name().eq_ignore_ascii_case(type_name))
{
return true;
}
}
false
}
/// Evaluate a `ConditionCompare` expression (e.g. `"EQ1"`, `"GT0"`) against a count.
fn evaluate_compare(compare: &str, count: usize) -> bool {
if compare.len() < 3 {
return true;
}
let op = &compare[..2];
let num: usize = compare[2..].parse().unwrap_or(0);
match op {
"EQ" => count == num,
"GT" => count > num,
"GE" => count >= num,
"LT" => count < num,
"LE" => count <= num,
"NE" => count != num,
_ => true,
}
}