export interface ApiEnvelope<T> {
  code: number
  message: string
  data?: T | null
  error?: string | null
  error_code?: string | null
  request_id?: string
}

export class ApiFailure extends Error {
  readonly code: number
  readonly errorCode?: string | null
  readonly requestId?: string | null

  constructor(message: string, code: number, errorCode?: string | null, requestId?: string | null) {
    super(message)
    this.name = 'ApiFailure'
    this.code = code
    this.errorCode = errorCode
    this.requestId = requestId
  }
}

export async function unwrapApi<T>(
  method: PromiseLike<
    | ApiEnvelope<unknown>
    | {
        code: number
        message: string
        data?: unknown
        error?: string | null
        error_code?: string | null
        request_id?: string
      }
  >,
): Promise<T> {
  const res = (await method) as ApiEnvelope<unknown>
  if (res.code !== 200) {
    throw new ApiFailure(res.error || res.message || 'request failed', res.code, res.error_code, res.request_id)
  }
  return res.data as T
}