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

@Injectable()
export class JwtStrategy extends PassportStrategy(Strategy, 'jwt') {
  constructor(
    private readonly prisma: PrismaService,
    configService: ConfigService,
  ) {
    super({
      jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
      ignoreExpiration: false,
      secretOrKey: configService.get<string>('JWT_SECRET') || 'fallback-secret',
    });
  }

  async validate(payload: { sub: number; email: string }) {
    const user = await this.prisma.user.findUnique({
      where: { id: payload.sub },
    });

    if (!user || !user.isActive) {
      throw new UnauthorizedException('User not found or inactive');
    }

    const { passwordHash, refreshToken, ...result } = user;
    return result;
  }
}