import { atom } from "jotai";
import { APIClient } from "./ApiClient";

const TokenStateKey = "auth-token";

export class AuthApi {
  /**
   * Check out whether user is signed in or not
   */
  static get SignedIn(): boolean {
    return sessionStorage.getItem(TokenStateKey) !== null;
  }

  static authStatus = atom(this.SignedIn);

  /**
   * Get user auth token
   */
  static get AuthToken(): string {
    if (!this.SignedIn) throw new Error("User is not authenticated!");
    return sessionStorage.getItem(TokenStateKey)!;
  }

  /**
   * Start OpenID login
   *
   * @param id The ID of the OIDC provider to use
   */
  static async StartOpenIDLogin(id: string): Promise<{ url: string }> {
    return (
      await APIClient.exec({
        uri: "/auth/start_openid_login",
        method: "POST",
        jsonData: { provider: id },
      })
    ).data;
  }

  /**
   * Finish OpenID login
   */
  static async FinishOpenIDLogin(code: string, state: string): Promise<void> {
    const res: { user_id: number; token: string } = (
      await APIClient.exec({
        uri: "/auth/finish_openid_login",
        method: "POST",
        jsonData: { code: code, state: state },
      })
    ).data;

    sessionStorage.setItem(TokenStateKey, res.token);
  }

  /**
   * Sign out
   */
  static async SignOut(): Promise<void> {
    await APIClient.exec({
      uri: "/auth/logout",
      method: "GET",
    });

    sessionStorage.removeItem(TokenStateKey);
  }

  /**
   * Request to reset password
   */
  static async RequestResetPassword(mail: string): Promise<void> {
    await APIClient.exec({
      uri: "/auth/request_reset_password",
      method: "POST",
      jsonData: { mail: mail },
    });
  }
}