import { Injectable, CanActivate, ExecutionContext } from '@nestjs/common';
import { Observable } from 'rxjs';
import { JwtService } from '@nestjs/jwt';

@Injectable()
export class JwtAuthGuard implements CanActivate {
  constructor(private jwtService: JwtService) {}

  canActivate(context: ExecutionContext): boolean | Promise<boolean> | Observable<boolean> {
    const request = context.switchToHttp().getRequest();
    try {
      const token = this.extractToken(request);
      if (!token) return false;
      
      const payload = this.jwtService.verify(token);
      request.user = payload;
      return true;
    } catch (e) {
      return false;
    }
  }

  private extractToken(request): string | null {
    return request.cookies?.access_token || 
           request.headers.authorization?.split(' ')[1] || 
           null;
  }
}