import type { DecodedToken } from '../auth/types/jwt';
import { LdapService } from '../ldap/ldap.service';
import { UsersCache } from './users.cache';
import { Injectable } from '@nestjs/common';
import { JwtService } from '@nestjs/jwt';

@Injectable()
export class UsersService {
  constructor(
    private readonly usersCache: UsersCache,
    private readonly jwtService: JwtService,
    private readonly ldapService: LdapService
  ) {}

  public async getUser(token: string) {
    const { username } = this.jwtService.decode(token) as DecodedToken;

    const cachedUser = await this.usersCache.getUser(username);

    if (!cachedUser) {
      const user = await this.ldapService.authenticate(username);

      await this.usersCache.addUser(username, user);

      return user;
    }

    return cachedUser;
  }
}