manabrew-engine 0.6.0

//! Cloak effect — like Manifest but with Ward {2}.
//!
//! Ported from Java's `CloakEffect.java`.
//! Cloak: Put card face-down as 2/2 creature with ward {2}.

use forge_foundation::ZoneType;

use super::manifest_base_effect::parse_manifest_params;
use super::{emit_zone_trigger, EffectContext};
use crate::ids::{CardId, PlayerId};
use crate::parsing::keys;
use crate::spellability::SpellAbility;

/// Struct form of this effect so it can participate in the
/// `SpellAbilityEffect` trait hierarchy — mirrors Java's
/// `CloakEffect` class extending `SpellAbilityEffect`.
#[manabrew_engine_macros::spell_effect(CloakEffect)]
fn resolve(ctx: &mut EffectContext, sa: &crate::spellability::SpellAbility) {
    let manifest_params = parse_manifest_params(ctx, sa);
    let amount = manifest_params.amount;
    let controller = sa.activating_player;

    let players = if let Some(def) = sa.defined_player() {
        super::resolve_defined_players(def, controller, ctx.game)
    } else {
        vec![controller]
    };

    for pid in players {
        cloak_for_player(ctx, sa, pid, amount);
    }
}

fn cloak_for_player(ctx: &mut EffectContext, sa: &SpellAbility, player: PlayerId, amount: usize) {
    // Default: top N cards of library
    let lib = ctx.game.cards_in_zone(ZoneType::Library, player).to_vec();
    let cards: Vec<CardId> = lib.into_iter().rev().take(amount).collect();

    for card_id in cards {
        let old_zone = ctx.game.card(card_id).zone;

        ctx.game.card_mut(card_id).set_face_down(true);
        ctx.game.card_mut(card_id).set_cloaked(true);
        ctx.game.card_mut(card_id).set_base_pt(Some(2), Some(2));
        // Ward {2} while cloaked
        ctx.game.card_mut(card_id).add_pump_keyword("Ward:2");
        ctx.game.card_mut(card_id).set_controller(player);

        if sa.is_tapped() {
            ctx.game.tap(card_id);
        }

        ctx.move_card(card_id, ZoneType::Battlefield, player);
        ctx.trigger_handler
            .register_active_trigger(ctx.game, card_id);

        if sa.param_is_true(keys::REMEMBER_CLOAKED) {
            if let Some(sid) = sa.source {
                ctx.game.card_mut(sid).add_remembered_card(card_id);
            }
        }

        emit_zone_trigger(
            ctx.trigger_handler,
            card_id,
            old_zone,
            ZoneType::Battlefield,
        );
    }
}