manabrew-engine 0.6.2

//! CountersRemoveAll effect — remove all counters of a type from permanents.
//!
//! Ported from Java's `CountersRemoveAllEffect.java`.

use super::{parse_counter_type, EffectContext};
use crate::card::valid_filter;
use forge_foundation::ZoneType;

/// Struct form of this effect so it can participate in the
/// `SpellAbilityEffect` trait hierarchy — mirrors Java's
/// `CountersRemoveAllEffect` class extending `SpellAbilityEffect`.
#[manabrew_engine_macros::spell_effect(CountersRemoveAllEffect)]
fn resolve(ctx: &mut EffectContext, sa: &crate::spellability::SpellAbility) {
    let counter_type_str = sa
        .ir
        .counter_type_text
        .clone()
        .unwrap_or_else(|| "P1P1".to_string());
    let counter_type = parse_counter_type(&counter_type_str);

    let targets: Vec<crate::ids::CardId> = if sa.uses_targeting() {
        sa.target_chosen.target_card.into_iter().collect()
    } else {
        // Remove from all permanents matching ValidCard$.
        let valid = sa.valid_card();
        let source = sa.source.map(|id| ctx.game.card(id));
        ctx.game
            .cards
            .iter()
            .filter(|c| {
                c.zone == ZoneType::Battlefield
                    && source.is_none_or(|source| {
                        valid_filter::matches_valid_card_selector_opt_in_game(
                            valid, c, source, ctx.game,
                        )
                    })
            })
            .map(|c| c.id)
            .collect()
    };

    for card_id in targets {
        let current = *ctx
            .game
            .card(card_id)
            .counters
            .get(&counter_type)
            .unwrap_or(&0);
        if current > 0 {
            ctx.game
                .card_mut(card_id)
                .remove_counter(&counter_type, current);
        }
    }
}