export async function executeUseInventoryItemAction(action, context) {
  const token = resolveUserToken(action, context);
  const actor = token?.actor;
  if (!actor) return { success: false, consumed: false, reason: "NO_USER" };

  const item = await resolveItem(actor, action.itemSelection);
  if (!item) return { success: false, consumed: false, reason: "NO_ITEM" };

  if (action.activationMode === "openSheet" || !item.use) {
    item.sheet?.render(true);
    return { success: true, consumed: true };
  }

  if (action.activationMode === "autoUse" && typeof item.use === "function") {
    await item.use();
    return { success: true, consumed: true };
  }

  item.sheet?.render(true);
  return { success: true, consumed: true };
}

function resolveUserToken(action, context) {
  switch (action.userMode ?? "affectedToken") {
    case "sourceToken": return context.sourceToken ?? null;
    case "assignedToken": return context.assignedToken ?? context.targetToken ?? null;
    case "affectedToken":
    default: return context.targetToken ?? context.tokenDocument?.object ?? null;
  }
}

async function resolveItem(actor, selection = {}) {
  if (selection.mode === "itemUuid" && selection.itemUuid) return fromUuid(selection.itemUuid);
  if (selection.mode === "itemName" && selection.itemName) return actor.items.find(item => item.name === selection.itemName);
  return null;
}