// gk-greyknight — auto-attach loadout on Grey Knight Archetype
Hooks.once("ready", () => {
  const PACK_KEY = "gk-greyknight.gk-items"; // moduleId.packName
  const NAMES = [
    "Aegis of Titan (Ability)",
    "Nemesis Force Halberd",
    "Grey Knight Armour Integrated Storm Bolter",
    "Aegis Power Armour"
  ];

  async function fetchFromCompendium(name) {
    const pack = game.packs.get(PACK_KEY);
    if (!pack) return null;
    const index = await pack.getIndex();
    const hit = index.find(e => e.name === name);
    if (!hit) return null;
    const doc = await pack.getDocument(hit._id);
    return doc?.toObject();
  }

  async function ensureOnActor(actor, name, equip=false) {
    const have = actor.items.getName(name);
    if (have) return have;
    let src = await fetchFromCompendium(name);
    if (!src) {
      // fallback: look in world items directory
      const world = game.items.getName(name);
      if (world) src = world.toObject();
    }
    if (!src) return null;
    // set equipped if item supports it
    if (equip && src.system && typeof src.system.equipped !== "undefined") {
      src.system.equipped = true;
    }
    const created = await actor.createEmbeddedDocuments("Item", [src]);
    return created[0];
  }

  // Hook: when the Grey Knight Archetype is added to an actor
  Hooks.on("createItem", async (item, opts, userId) => {
    try {
      if (item?.type !== "archetype") return;
      if (item?.name !== "Grey Knight (Archetype)") return;
      const actor = item.parent;
      if (!actor || game.userId !== userId) return;

      // Attach base loadout (War-Plate default) + ability
      await ensureOnActor(actor, "Aegis of Titan (Ability)", false);
      await ensureOnActor(actor, "Nemesis Force Halberd", true);
      await ensureOnActor(actor, "Grey Knight Armour Integrated Storm Bolter", true);
      await ensureOnActor(actor, "Aegis Power Armour", true);

      // Optional: enable Aegis Synergy effect if present and Aegis is equipped
      const abil = actor.items.getName("Aegis of Titan (Ability)");
      const aegis = actor.items.getName("Aegis Power Armour");
      const hasAegis = !!(aegis?.system?.equipped);
      if (abil && abil.effects) {
        for (const ef of abil.effects) {
          if (ef.name?.toLowerCase().includes("synergy")) await ef.update({disabled: !hasAegis});
        }
      }

      ui.notifications.info("Grey Knight loadout attached.");
    } catch (e) {
      console.error("gk-greyknight auto-loadout error:", e);
    }
  });
});