import { logger } from 'infra/logger.ts';

export default class Controller {
  constructor(
    public path: string,
    public method: string,
    public handler: (req: Request) => Response | Promise<Response>,
    public headers: Record<string, string> = {},
  ) {}

  public static response = (req: Request, body?: string, json = false) => {
    const url = new URL(req.url);
    const output = new TextEncoder().encode(body);
    const response = new Response(output);
    const userName = this.getUser(req);

    if (json) {
      response.headers.set('Content-Type', 'application/json');
    }

    logger.info(
      `[${req.method}] ${url.pathname} ${
        userName ? userName + ' ' : ''
      }${response.status} ${output.byteLength}`,
    );
    return response;
  };

  public static responseJSON = (req: Request, body?: unknown) => {
    return this.response(req, JSON.stringify(body), true);
  };

  private static getUser = (req: Request): string | undefined => {
    const authHeader = req.headers.get('Authorization');

    if (authHeader && authHeader.startsWith('Basic ')) {
      const base64Credentials = authHeader.slice(6);
      const credentials = atob(base64Credentials);
      const [userName] = credentials.split(':');

      return userName;
    }

    return;
  };
}