import {
  Controller,
  Get,
  Headers,
  Param,
  Req,
  Res,
} from '@nestjs/common';
import type { Request, Response } from 'express';
import { TrackingService } from './tracking.service';

/**
 * ریدایرکت عمومی بدون احراز هویت.
 * مسیر نهایی: GET /api/t/:token
 */
@Controller('t')
export class PublicTrackingController {
  constructor(private readonly tracking: TrackingService) {}

  @Get(':token')
  async redirect(
    @Param('token') token: string,
    @Headers('user-agent') userAgent: string | undefined,
    @Headers('referer') referer: string | undefined,
    @Req() req: Request,
    @Res() res: Response,
  ) {
    const ip =
      (typeof req.headers['x-forwarded-for'] === 'string'
        ? req.headers['x-forwarded-for'].split(',')[0]?.trim()
        : undefined) ||
      req.ip ||
      undefined;

    const target = await this.tracking.handleClick(token, {
      userAgent,
      referer,
      ip,
    });

    return res.redirect(302, target);
  }
}