export const DEFAULT_AUGMENTS = [
    { id: "force", name: "Kinetic Amplifier", effect: "+1 Damage on Melee attacks", cost: "2 Iron", precompile: 1 },
    { id: "fire", name: "Thermal Core", effect: "Deals Fire damage instead of Physical", cost: "1 Blaze Glass", precompile: 1 },
    { id: "shock", name: "Static Coil", effect: "Targets hit are Dazed", cost: "3 Copper", precompile: 2 },
    { id: "shield", name: "Reactive Plating", effect: "+1 Armor while equipped", cost: "2 Steel", precompile: 1 },
    { id: "range", name: "Long-Range Optics", effect: "Increases Range by 1 step", cost: "1 Lens", precompile: 2 },
    { id: "crit", name: "Precision Chip", effect: "+1 to Crit range", cost: "1 Gold", precompile: 3 },
    { id: "multi", name: "Burst Module", effect: "Can target 2 enemies (Half damage)", cost: "2 Gears", precompile: 4 },
    { id: "drain", name: "Siphon Link", effect: "Recover 1 Hope on kill", cost: "1 Soul Gem", precompile: 4 },
    { id: "weight", name: "Gravity Plate", effect: "Weapon is Heavy (more damage)", cost: "4 Lead", precompile: 2 }
];

// Global caches for resolved features to keep getters fast
const _featureCache = new Map();

export function getAugments() {
    return game.settings.get('dh-ikonis', 'augmentsList') || DEFAULT_AUGMENTS;
}

/**
 * Pre-loads all features from the compendium into memory.
 * This is necessary because sheetLists getter is synchronous.
 */
export async function loadIkonisFeatures() {
    console.log("DH-Ikonis | Pre-loading features into cache...");
    const allAugs = getAugments();
    const bondedUuid = game.settings.get('dh-ikonis', 'defaultBondedUuid');
    
    const uuids = new Set(allAugs.map(a => a.featureUuid).filter(Boolean));
    if (bondedUuid) uuids.add(bondedUuid);

    for (const uuid of uuids) {
        try {
            const item = await fromUuid(uuid);
            if (item) {
                _featureCache.set(uuid, item);
                console.log(`DH-Ikonis | Cached feature: ${item.name} [${uuid}]`);
            }
        } catch (e) {
            console.error(`DH-Ikonis | Failed to load feature ${uuid}`, e);
        }
    }
    console.log(`DH-Ikonis | Cache size: ${_featureCache.size}`);
}

/**
 * Robust feature fetching. Tries cache first, then async fromUuid.
 */
export async function getAttachedFeature(uuid) {
    if (!uuid) return null;
    if (_featureCache.has(uuid)) return _featureCache.get(uuid);
    return await fromUuid(uuid);
}

export function getSlotCount(item) {
    const flags = item.getFlag('dh-ikonis') || {};
    if (typeof flags.slotOverride === "number") return flags.slotOverride;

    let tier = item.system?.tier?.value;
    if (tier === undefined) tier = item.system?.tier;
    const tierNum = parseInt(tier) || 1;
    
    const settingKey = `slotsTier${tierNum}`;
    try {
        return game.settings.get('dh-ikonis', settingKey);
    } catch (e) {
        return tierNum >= 2 ? 3 : 2;
    }
}

/**
 * Synchronizes Ikonis Augments into the Daggerheart Homebrew settings.
 * This makes them "Real" Weapon Features to the system.
 */
export async function syncIkonisToHomebrew() {
    if (!game.user.isGM) return;

    const MODULE_ID = 'dh-ikonis';
    const homebrewKey = game.settings.settings.has('daggerheart.Homebrew') ? 'Homebrew' : 'homebrew';
    const homebrew = game.settings.get('daggerheart', homebrewKey);
    
    if (!homebrew.itemFeatures) homebrew.itemFeatures = { weaponFeatures: {}, armorFeatures: {} };
    if (!homebrew.itemFeatures.weaponFeatures) homebrew.itemFeatures.weaponFeatures = {};

    let updates = false;
    const allAugments = getAugments();

    for (const aug of allAugments) {
        const feature = _featureCache.get(aug.featureUuid) || await fromUuid(aug.featureUuid);
        if (feature && !homebrew.itemFeatures.weaponFeatures[aug.id]) {
            console.log(`DH-Ikonis | Registering ${aug.name} as native weapon feature...`);
            
            // Format actions for the system's Homebrew model
            const actions = {};
            if (feature.system.actions) {
                for (const [id, action] of Object.entries(feature.system.actions)) {
                    actions[id] = action.toObject();
                }
            }

            homebrew.itemFeatures.weaponFeatures[aug.id] = {
                name: aug.name,
                img: aug.img || feature.img,
                description: feature.system.description,
                actions: actions,
                effects: Array.from(feature.effects || []).map(e => e.toObject())
            };
            updates = true;
        }
    }

    if (updates) {
        await game.settings.set('daggerheart', homebrewKey, homebrew);
        console.log("DH-Ikonis | Homebrew settings synchronized.");
    }
}

/**
 * Patches the system's weapon data preparation to handle slot counts.
 */
export function patchIkonisLogic() {
    // We no longer need to patch Actor.allApplicableEffects 
    // because the system handles native weapon features automatically.
}

/**
 * Placeholder for character patching - no longer needed for virtual items
 */
export function patchDhCharacter(DhCharacter) {
    // Injection is deprecated in favor of native weapon features
}

export function patchDHWeapon() {
    // Future: Add damage type override logic here
}