import { NextApiResponse } from 'next';

const getErrorMessage = (error: unknown): any => {
  if (error instanceof Error) {
    const shellError = error as any;

    // Handle shell errors
    if ('code' in shellError || 'stderr' in shellError || 'stdout' in shellError) {
      return {
        code: shellError.code ?? null,
        cmd: shellError.cmd ?? null,
        stderr: shellError.stderr ?? null,
        stdout: shellError.stdout ?? null,
      };
    }

    return error.message;
  }

  if (typeof error === 'object' && error !== null && 'code' in error) {
    const err = error as { code?: string };
    if (err.code === 'ENOENT') {
      return 'No such file or directory';
    }
  }

  return 'API error, contact the administrator';
};

export default class ApiResponse {
  static success<T>(res: NextApiResponse, message = 'Success', data?: T) {
    res.status(200).json({ status: 200, message, data });
  }

  static badRequest(res: NextApiResponse, message = 'Bad Request') {
    res.status(400).json({ status: 400, message });
  }

  static unauthorized(res: NextApiResponse, message = 'Unauthorized') {
    res.status(401).json({ status: 401, message });
  }

  static forbidden(res: NextApiResponse, message = 'Forbidden') {
    res.status(403).json({ status: 403, message });
  }

  static notFound(res: NextApiResponse, message = 'Not Found') {
    res.status(404).json({ status: 404, message });
  }

  static methodNotAllowed(res: NextApiResponse, message = 'Method Not Allowed') {
    res.status(405).json({ status: 405, message });
  }

  static validationError(res: NextApiResponse, message = 'Validation Error') {
    res.status(422).json({ status: 422, message });
  }

  static conflict(res: NextApiResponse, message = 'Conflict') {
    res.status(409).json({ status: 409, message });
  }

  static serverError(
    res: NextApiResponse,
    error: unknown,
    fallbackMessage = 'API error, contact the administrator'
  ) {
    const message = getErrorMessage(error) || fallbackMessage;
    res.status(500).json({ status: 500, message });
  }
}