type Method = 'GET' | 'POST' | 'PUT' | 'DELETE'

// 使用宽松签名，返回类型由调用方通过泛型指定
const rawFetch = $fetch as unknown as <T>(url: string, opts?: { method?: Method, body?: unknown }) => Promise<T>

/** 统一的接口调用：自动弹出错误提示 */
export function useApi() {
  const toast = useToast()

  async function call<T = unknown>(url: string, method: Method = 'GET', body?: unknown, opts: { silent?: boolean, title?: string } = {}): Promise<T> {
    try {
      return await rawFetch<T>(url, { method, body })
    }
    catch (err) {
      if (!opts.silent) toast.add({ title: opts.title ?? '操作失败', description: apiErrorMessage(err), color: 'error', icon: 'i-lucide-circle-alert' })
      throw err
    }
  }

  return {
    get: <T>(url: string) => call<T>(url, 'GET'),
    post: <T>(url: string, body?: unknown, opts?: { silent?: boolean }) => call<T>(url, 'POST', body ?? {}, opts),
    put: <T>(url: string, body?: unknown) => call<T>(url, 'PUT', body ?? {}),
    del: <T>(url: string) => call<T>(url, 'DELETE'),
    upload: <T>(url: string, form: FormData) => call<T>(url, 'POST', form, { title: '上传失败' }),
    toast
  }
}