const BASE_URL = import.meta.env.VITE_API_BASE || '/api'

async function request(method, path, body = null) {
  const headers = { 'Content-Type': 'application/json' }
  const token = localStorage.getItem('token')
  if (token) headers['Authorization'] = `Bearer ${token}`

  const res = await fetch(`${BASE_URL}${path}`, {
    method,
    headers,
    body: body ? JSON.stringify(body) : null,
  })

  if (res.status === 401) {
    localStorage.removeItem('token')
    const basePath = import.meta.env.VITE_BASE_PATH || '/leopost-full'
    window.location.href = basePath ? `${basePath}/login` : '/login'
    return
  }

  if (!res.ok) {
    const error = await res.json().catch(() => ({ detail: 'Request failed' }))
    // Pass through structured errors (upgrade_required etc.)
    const detail = error.detail
    if (typeof detail === 'object' && detail !== null) {
      const err = new Error(detail.message || 'Request failed')
      err.data = detail
      throw err
    }
    throw new Error(detail || 'Request failed')
  }

  if (res.status === 204) return null
  return res.json()
}

export const api = {
  get: (path) => request('GET', path),
  post: (path, body) => request('POST', path, body),
  put: (path, body) => request('PUT', path, body),
  delete: (path) => request('DELETE', path),
}

export { BASE_URL }