import { ExtractJwt, Strategy } from 'passport-jwt';
import { PassportStrategy } from '@nestjs/passport';
import { Injectable } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';

// Interface สำหรับ Payload ใน Token
interface JwtPayload {
  sub: number;
  username: string;
}

import { UserService } from '../../modules/user/user.service.js';

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

  async validate(payload: JwtPayload) {
    const user = await this.userService.findOne(payload.sub);
    if (!user) {
      throw new Error('User not found');
    }
    return user;
  }
}