export class ApiError extends Error {
  readonly status: number;

  constructor(message: string, status: number) {
    super(message);
    this.name = "ApiError";
    this.status = status;
  }
}

export function mapHttpStatusToMessage(status: number, data?: unknown): string {
  if (status === 401) {
    return "You are not authorized to access this page.";
  }
  if (status === 403) {
    return "You do not have permission to perform this action.";
  }
  if (status === 404) {
    return "The requested resource was not found.";
  }
  if (status === 500) {
    return "A server error occurred. Please try again later.";
  }

  if (data && typeof data === "object") {
    const record = data as Record<string, unknown>;
    const message = record.message ?? record.Message ?? record.error;
    if (typeof message === "string" && message.length > 0) {
      return message;
    }
  }

  return "An error occurred";
}

export async function createApiErrorFromResponse(response: Response): Promise<ApiError> {
  let data: unknown;
  try {
    data = await response.json();
  } catch {
    data = undefined;
  }

  return new ApiError(mapHttpStatusToMessage(response.status, data), response.status);
}