import { apiFetch } from './api';
import type { EntityResponse, InventoryTreeNode, ListResponse, NodeContext, Relation } from '../types/inventory';

async function handleResponse<T>(response: Response): Promise<T> {
  if (!response.ok) throw new Error(`API error: ${response.status}`);
  return response.json() as Promise<T>;
}

async function fetchJson<T>(path: string): Promise<T> {
  const response = await apiFetch(path, { cache: 'no-store' });
  return handleResponse<T>(response);
}

export async function fetchInventoryTree(): Promise<InventoryTreeNode[]> {
  const data = await fetchJson<ListResponse<InventoryTreeNode>>('/inventory/tree');
  return data.items;
}

export async function fetchNodeContext(id: string): Promise<NodeContext> {
  const data = await fetchJson<EntityResponse<NodeContext>>(`/inventory/nodes/${id}/context`);
  return data.item;
}

export async function fetchNodeRelations(id: string): Promise<Relation[]> {
  const data = await fetchJson<ListResponse<Relation>>(`/inventory/nodes/${id}/relations`);
  return data.items;
}