import { Injectable, Logger, UnauthorizedException } from '@nestjs/common';
import { PassportStrategy } from '@nestjs/passport';
import { ExtractJwt, Strategy } from 'passport-jwt';
import { ConfigService } from '@nestjs/config';
import { UserService } from 'modules/user/users.service';

@Injectable()
export class JwtStrategy extends PassportStrategy(Strategy) {
  private logger = new Logger('JwtStrategy');
  constructor(
    private configService: ConfigService,
    private readonly userService: UserService,
  ) {
    super({
      jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
      ignoreExpiration: false,
      secretOrKey: configService.get<string>('JWT_SECRET'),
    });
  }

  async validate(payload: { id: number; role: string }) {
    const user = await this.userService.findUserById(payload.id);
    if (!user) {
      this.logger.error('Invalid authentication token');
      throw new UnauthorizedException('Invalid authentication token');
    }
    return user;
  }
}