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

interface JwtPayload {
  sub: string;
  username: string;
}

@Injectable()
export class JwtStrategy extends PassportStrategy(Strategy) {
  constructor() {
    const jwtExtractor = ExtractJwt.fromAuthHeaderAsBearerToken();
    const options: StrategyOptions = {
      jwtFromRequest: jwtExtractor,
      ignoreExpiration: false,
      secretOrKey: process.env.JWT_SECRET || 'your-secret-key',
    };

    super(options);
  }

  validate(payload: JwtPayload): { id: string; username: string } {
    return { id: payload.sub, username: payload.username };
  }
}