const BASE = '/cashup/api'

async function req<T>(method: string, path: string, body?: unknown): Promise<T> {
  const res = await fetch(BASE + path, {
    method,
    credentials: 'include',
    headers: body ? { 'Content-Type': 'application/json' } : undefined,
    body: body ? JSON.stringify(body) : undefined,
  })
  if (!res.ok) {
    const err = await res.json().catch(() => ({ error: res.statusText }))
    throw new Error((err as { error?: string }).error || res.statusText)
  }
  return res.json()
}

export const api = {
  get:    <T>(path: string) => req<T>('GET', path),
  post:   <T>(path: string, body: unknown) => req<T>('POST', path, body),
  put:    <T>(path: string, body: unknown) => req<T>('PUT', path, body),
  delete: <T>(path: string) => req<T>('DELETE', path),
}

export async function uploadAttachment(
  cashUpId: number,
  file: File,
  attachmentType: 'pdq_z_report' | 'receipt_error' | 'other' = 'other',
  label?: string,
) {
  const fd = new FormData()
  fd.append('attachment_type', attachmentType)
  if (label) fd.append('label', label)
  fd.append('file', file)
  const res = await fetch(`${BASE}/attachments/upload/${cashUpId}`, {
    method: 'POST',
    credentials: 'include',
    body: fd,
  })
  if (!res.ok) {
    const err = await res.json().catch(() => ({ error: res.statusText }))
    throw new Error((err as { error?: string }).error || res.statusText)
  }
  return res.json()
}