import { isHTTPError, isNetworkError, isTimeoutError } from "ky";

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 function normalizeApiRequestError(error: Error): Error {
  if (isHTTPError(error)) {
    error.message = mapHttpStatusToMessage(error.response.status, error.data);
    return error;
  }

  if (isNetworkError(error)) {
    error.message = "No response from server. Please check your connection.";
    return error;
  }

  if (isTimeoutError(error)) {
    error.message = "The request timed out. Please try again.";
    return error;
  }

  return error;
}