import { Injectable } from '@nestjs/common';
import { PassportStrategy } from '@nestjs/passport';
import { ExtractJwt, Strategy } from 'passport-jwt';
import { ConfigService } from '@nestjs/config';
import { AuthService } from './auth.service';
import { Request } from 'express';

export interface JwtPayload {
  sub: string;
  email?: string;
}

@Injectable()
export class JwtStrategy extends PassportStrategy(Strategy) {
  constructor(
    private readonly configService: ConfigService,
    private readonly authService: AuthService,
  ) {
    super({
      jwtFromRequest: ExtractJwt.fromExtractors([
        ExtractJwt.fromAuthHeaderAsBearerToken(),
        (req: Request) => {
          if (req?.query && typeof req.query.token === 'string') {
            return req.query.token;
          }
          return null;
        },
      ]),
      ignoreExpiration: false,
      secretOrKey:
        configService.get<string>('JWT_SECRET') ||
        'super-secret-key-whatsapp-commerce-hub',
    });
  }

  async validate(payload: JwtPayload) {
    const business = await this.authService.validateBusiness(payload.sub);
    if (!business) {
      return null;
    }
    return business;
  }
}