// Базовый fetch к Go API
export function useApi() {
  async function get<T>(path: string, params?: Record<string, string | number>) {
    const url = new URL('/api' + path, window.location.origin)
    if (params) {
      Object.entries(params).forEach(([k, v]) => url.searchParams.set(k, String(v)))
    }
    const res = await fetch(url.toString())
    if (!res.ok) throw new Error(await res.text())
    return res.json() as Promise<T>
  }

  async function post<T>(path: string, body?: unknown) {
    const res = await fetch('/api' + path, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: body ? JSON.stringify(body) : undefined,
    })
    if (!res.ok) throw new Error(await res.text())
    return res.json() as Promise<T>
  }

  async function del(path: string) {
    const res = await fetch('/api' + path, { method: 'DELETE' })
    if (!res.ok) throw new Error(await res.text())
    return res.json()
  }

  async function upload(path: string, file: File) {
    const form = new FormData()
    form.append('file', file)
    const res = await fetch('/api' + path, { method: 'POST', body: form })
    if (!res.ok) throw new Error(await res.text())
    return res.json()
  }

  return { get, post, del, upload }
}