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

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

  public async login(login: string, password: string) {
    const {
      displayName,
      department,
      title,
      mail,
      sAMAccountName: username,
    } = await this.ldapService.authenticate(login, password);

    const user = {
      username,
      domain: process.env.domain,
      displayName,
      department,
      position: title,
      mail,
      domainName: `${process.env.domain}\\${username}`,
    };
    await this.usersCache.addUser(username, user);

    const payload: TokenPayload = {
      username,
      domain: process.env.domain,
    };

    return this.jwtService.sign(payload);
  }

  public async logout(token: string) {
    const { username } = this.jwtService.decode(token) as DecodedToken;
    await this.usersCache.deleteUser(username);
  }

  public checkToken(token: string) {
    this.jwtService.verify(token);
  }

  public refreshToken(token: string) {
    const { exp, iat, ...payload } = this.jwtService.decode(token) as DecodedToken;

    return this.jwtService.sign(payload);
  }
}