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

@Injectable()
export class PortalJwtStrategy extends PassportStrategy(Strategy, 'portal-jwt') {
  constructor(config: ConfigService) {
    super({
      jwtFromRequest: ExtractJwt.fromAuthHeaderAsBearerToken(),
      ignoreExpiration: false,
      secretOrKey: config.get<string>('JWT_SECRET') || 'fallback',
    });
  }

  validate(payload: any) {
    if (payload.type !== 'portal') {
      throw new UnauthorizedException('Invalid token type');
    }
    return { sub: payload.sub, tenantId: payload.tenantId, type: 'portal' };
  }
}