import { Controller, Get, Param, Res } from '@nestjs/common';
import { ApiExcludeController } from '@nestjs/swagger';
import type { Response } from 'express';
import { Public } from '../auth/decorators/public.decorator';
import { ShortLinksService } from './short-links.service';

/**
 * Registered outside the global `api` prefix (see main.ts) so links stay short,
 * e.g. `https://api.example.com/s/aB3xQ9k`.
 */
@ApiExcludeController()
@Controller('s')
export class ShortLinksController {
  constructor(private readonly shortLinksService: ShortLinksService) {}

  @Public()
  @Get(':code')
  async redirect(@Param('code') code: string, @Res() res: Response) {
    const targetUrl = await this.shortLinksService.resolveAndTrack(code);
    return res.redirect(targetUrl);
  }
}