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

export interface JwtPayload {
  sub: string; // user ID
  email: string;
  iat?: number;
  exp?: number;
}

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

  async validate(payload: JwtPayload) {
    return { userId: payload.sub, email: payload.email };
  }
}