manabrew-engine 0.2.0

//! Card assembly pipeline — separates parsing from behavior rewrites.
//!
//! Splits the old monolithic `Card::from_rules` into three phases:
//!
//! 1. **`parse_card_components`** — pure parsing, no side effects
//! 2. **`synthesize_derived`** — behavior rewrites (SpellCastOrCopy duplication,
//!    AlternativeCost keyword extraction, Exert trigger synthesis)
//! 3. **`assemble_card`** — combines components into a `Card`
//!
//! This mirrors Java's separation between `AbilityFactory` (parsing),
//! `TriggerHandler` (registration), and `Card` (construction).

use forge_carddb::CardRules;
use forge_foundation::CardStateName;

use crate::ids::{CardId, PlayerId};
use crate::parsing::parse_classified_or_warn;
use crate::replacement::{parse_replacement_effect, ReplacementEffect};
use crate::staticability::{parse_static_ability, StaticAbility};
use crate::trigger::{parse_trigger, Trigger};

use super::{Card, CardOtherPart};

fn mark_triggers_card_state(triggers: &mut [Trigger], card: &Card, state_name: CardStateName) {
    let mut state = crate::card::card_state::CardState::new(card.clone(), state_name);
    state.set_name(match state_name {
        CardStateName::RightSplit => card
            .svars
            .get("RoomRightSplitName")
            .cloned()
            .unwrap_or_else(|| card.card_name.clone()),
        _ => card.card_name.clone(),
    });
    for trigger in triggers {
        trigger.base.set_card_state(state.clone());
    }
}

/// Devoid as a CDA colorless override across all zones — mirrors
/// `CardFactoryUtil.addKeywordAbility("Devoid", ...)`.
fn intrinsic_color(face: &forge_carddb::CardFace) -> forge_foundation::ColorSet {
    if face.keywords.iter().any(|k| k == "Devoid") {
        return forge_foundation::ColorSet::COLORLESS;
    }
    face.resolved_color()
}

// ── Phase 1: Parse ──────────────────────────────────────────────────────────

/// Parsed components from a card face's raw text, before any rewrites.
pub(crate) struct ParsedComponents {
    pub triggers: Vec<Trigger>,
    pub static_abilities: Vec<StaticAbility>,
    pub replacement_effects: Vec<ReplacementEffect>,
    /// Raw trigger lines that contained `Mode$ SpellCastOrCopy`,
    /// needed for Magecraft duplication in Phase 2.
    pub spell_cast_or_copy_raw: Vec<String>,
}

/// Phase 1: Parse triggers, static abilities, and replacement effects from
/// a card face's raw text lines.
pub(crate) fn parse_card_components(face: &forge_carddb::CardFace) -> ParsedComponents {
    let mut next_trigger_id = 0u32;
    let mut triggers = Vec::new();
    let mut spell_cast_or_copy_raw = Vec::new();

    for raw in &face.triggers {
        if let Some(trig) =
            parse_classified_or_warn(parse_trigger(raw, &mut next_trigger_id), "Trigger", raw)
        {
            triggers.push(trig);
            if raw.contains("Mode$ SpellCastOrCopy") {
                spell_cast_or_copy_raw.push(raw.clone());
            }
        }
    }

    // Parse static abilities from S: lines (need S$ prefix for the parser)
    let mut static_abilities = Vec::new();
    for raw in &face.static_abilities {
        let prefixed = format!("S$ {}", raw);
        if let Some(sa) =
            parse_classified_or_warn(parse_static_ability(&prefixed), "StaticAbility", raw)
        {
            static_abilities.push(sa);
        }
    }

    // Parse replacement effects from R: lines (need R$ prefix for the parser)
    let replacement_effects: Vec<ReplacementEffect> = face
        .replacements
        .iter()
        .filter_map(|raw| {
            let prefixed = format!("R$ {}", raw);
            parse_classified_or_warn(
                parse_replacement_effect(&prefixed),
                "ReplacementEffect",
                raw,
            )
        })
        .collect();

    ParsedComponents {
        triggers,
        static_abilities,
        replacement_effects,
        spell_cast_or_copy_raw,
    }
}

// ── Phase 2: Synthesize ─────────────────────────────────────────────────────

/// Phase 2: Apply behavior rewrites that derive new triggers/keywords from
/// parsed components.
///
/// - Duplicate `SpellCastOrCopy` triggers as `SpellCopied` (Magecraft)
/// - Synthesize `Exerted` triggers from `OptionalAttackCost` with Exert cost
pub(crate) fn synthesize_derived(components: &mut ParsedComponents, existing_trigger_count: usize) {
    let mut next_trig_id = (existing_trigger_count + components.triggers.len()) as u32;

    // Duplicate SpellCastOrCopy triggers as SpellCopied (for Magecraft)
    for raw in &components.spell_cast_or_copy_raw {
        let converted = raw.replace("Mode$ SpellCastOrCopy", "Mode$ SpellCopied");
        if let Some(trig) = parse_trigger(&converted, &mut next_trig_id) {
            components.triggers.push(trig);
        }
    }

    // OptionalAttackCost with Exert + Trigger$: register an Exerted trigger
    for sa in &components.static_abilities {
        if !sa.check_mode(&crate::staticability::StaticMode::OptionalAttackCost) {
            continue;
        }
        let has_exert = sa
            .ir
            .cost
            .as_deref()
            .map(|c| c.contains("Exert"))
            .unwrap_or(false);
        if has_exert {
            if let Some(svar_name) = sa.ir.trigger_text.as_deref() {
                let raw = format!(
                    "Mode$ Exerted | ValidCard$ Card.Self | Execute$ {} | TriggerZones$ Battlefield",
                    svar_name
                );
                if let Some(mut trig) = parse_trigger(&raw, &mut next_trig_id) {
                    trig.execute = svar_name.to_string();
                    components.triggers.push(trig);
                }
            }
        }
    }
}

// ── Phase 3: Assemble ───────────────────────────────────────────────────────

/// Phase 3: Combine parsed + synthesized components into a `Card`.
pub(crate) fn assemble_card(
    rules: &CardRules,
    owner: PlayerId,
    mut components: ParsedComponents,
) -> Card {
    let face = &rules.main_part;

    let full_name = rules.name();
    let mut card = Card::new(
        CardId(0),
        face.name.clone(),
        owner,
        face.type_line.clone(),
        face.mana_cost.clone(),
        intrinsic_color(face),
        face.int_power,
        face.int_toughness,
        face.keywords.clone(),
        face.abilities.clone(),
    );
    // Set the full combined name for split/room cards (e.g. "A // B").
    // card_name stays as the front face; full_name is used for hand/graveyard/lookup.
    card.full_name = full_name;
    // Preserve rules-level color identity (CR 903.4: includes mana symbols in
    // oracle text, e.g. Ashling, the Limitless mentions {W}{U}{B}{R}{G} so its
    // identity is five-colour even though its mana cost is just {2}{R}).
    card.color_identity = rules.color_identity;
    card.attraction_lights = face.attraction_lights.clone();
    card.initial_loyalty = face.initial_loyalty.clone();

    // Append parsed triggers to keyword-generated ones.
    if rules.split_type == forge_foundation::CardSplitType::Split
        && card.type_line.has_subtype("Room")
    {
        mark_triggers_card_state(&mut components.triggers, &card, CardStateName::LeftSplit);
    }
    for trig in components.triggers {
        card.add_trigger(trig);
    }

    // Merge card-text SVars (keyword-generated SVars already set by constructor)
    for (k, v) in &face.svars {
        card.svars.entry(k.clone()).or_insert_with(|| v.clone());
    }

    // Java parity: convert ETBReplacement keywords into intrinsic
    // Event$ Moved replacement effects after SVars are available.
    super::card_factory_util::add_etb_keyword_replacements(&mut card);

    // Java parity: convert Dredge:N keywords into Draw replacement effects.
    super::card_factory_util::add_dredge_replacement(&mut card);

    // Java parity: convert Madness:{cost} keywords into Moved replacement effects.
    super::card_factory_util::add_madness_replacement(&mut card);

    // Java parity: convert Flashback:{cost} keywords into Moved replacement effects
    // that exile the card instead of putting it into the graveyard from the stack.
    super::card_factory_util::add_flashback_replacement(&mut card);

    super::card_factory_util::add_harmonize_replacement(&mut card);

    // Add parsed static abilities and replacement effects.
    for sa in components.static_abilities {
        card.add_static_ability(sa);
    }
    for re in components.replacement_effects {
        card.add_replacement_effect(re);
    }
    // Room enchantments with Split type: generate unlock-door activated ability.
    // Mirrors Java CardFactoryUtil: "ST$ UnlockDoor | Cost$ {mana_cost} | ..."
    // When a Room enters the battlefield, the first door is unlocked.
    // Paying the second door's mana cost unlocks it and fires the UnlockDoor trigger.
    if rules.split_type == forge_foundation::CardSplitType::Split
        && card.type_line.has_subtype("Room")
    {
        if let Some(ref other_face) = rules.other_part {
            let unlock_cost = other_face
                .mana_cost
                .to_string()
                .replace('{', "")
                .replace('}', " ")
                .trim()
                .to_string();
            let unlock_name = &other_face.name;
            card.set_s_var("RoomRightSplitName", unlock_name.as_str());
            card.set_s_var("RoomRightSplitCost", &unlock_cost);
            // Build an activated ability for unlocking the second door.
            let ab_text = format!(
                "AB$ UnlockDoor | Cost$ {} | SorcerySpeed$ True | CardState$ RightSplit | SpellDescription$ Unlock {}",
                unlock_cost, unlock_name
            );
            let next_idx = card.activated_abilities.len();
            if let Some(ab) = crate::ability::activated::parse_activated_ability(&ab_text, next_idx)
            {
                card.activated_abilities.push(ab);
            }
            // Copy other face's SVars so the Execute$ SVar can be found
            // when the second door is unlocked via the activated ability.
            for (k, v) in &other_face.svars {
                card.svars.entry(k.clone()).or_insert_with(|| v.clone());
            }
            let mut next_trigger_id = card.triggers.len() as u32;
            let mut other_triggers: Vec<_> = other_face
                .triggers
                .iter()
                .filter_map(|raw| {
                    parse_classified_or_warn(
                        parse_trigger(raw, &mut next_trigger_id),
                        "Trigger",
                        raw,
                    )
                })
                .collect();
            mark_triggers_card_state(&mut other_triggers, &card, CardStateName::RightSplit);
            for trig in other_triggers {
                card.add_trigger(trig);
            }
        }
    }

    // Double-faced cards
    if rules.split_type.is_dual_faced() {
        if let Some(ref back_face) = rules.other_part {
            let mut back_trigger_id = 0u32;
            let back_triggers: Vec<_> = back_face
                .triggers
                .iter()
                .filter_map(|raw| {
                    parse_classified_or_warn(
                        parse_trigger(raw, &mut back_trigger_id),
                        "Trigger",
                        raw,
                    )
                })
                .collect();

            let back_static_abilities: Vec<StaticAbility> = back_face
                .static_abilities
                .iter()
                .filter_map(|raw| {
                    parse_classified_or_warn(
                        parse_static_ability(&format!("S$ {}", raw)),
                        "StaticAbility",
                        raw,
                    )
                })
                .collect();

            let back_replacement_effects: Vec<ReplacementEffect> = back_face
                .replacements
                .iter()
                .filter_map(|raw| {
                    parse_classified_or_warn(
                        parse_replacement_effect(&format!("R$ {}", raw)),
                        "ReplacementEffect",
                        raw,
                    )
                })
                .collect();

            card.other_part = Some(CardOtherPart {
                name: back_face.name.clone(),
                type_line: back_face.type_line.clone(),
                mana_cost: back_face.mana_cost.clone(),
                color: intrinsic_color(back_face),
                base_power: back_face.int_power,
                base_toughness: back_face.int_toughness,
                keywords: crate::keyword::keyword_collection::KeywordCollection::from_strings(
                    &back_face.keywords,
                ),
                abilities: back_face.abilities.clone(),
                triggers: back_triggers,
                static_abilities: back_static_abilities,
                replacement_effects: back_replacement_effects,
                svars: back_face.svars.clone(),
            });
        }
    }

    // Parsed triggers and any constructor-time synthetic abilities/triggers have
    // now all been attached. Refresh the base counts so continuous-layer reset
    // logic does not strip real printed abilities from hidden-zone cards.
    card.refresh_action_specs();
    card.base_ability_count = card.activated_abilities.len();
    card.base_trigger_count = card.triggers.len();

    card
}