using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using Firebase;

using Firebase.Database;

using UnityEngine.UI;

using TMPro;

public class DBManager : MonoBehaviour

$\{$

$//$ Firebase references

public DatabaseReference usersRef;

$//$ UI input fields

public TMP$\_$InputField usernameInput;

public TMP$\_$InputField passwordInput;

void Start$()$

$\{$

$//$ Initialize Firebase asynchronously

StartCoroutine$($InitializeFirebase$())$;

$\}$

private IEnumerator InitializeFirebase$()$

$\{$

var task $=$ FirebaseApp.CheckAndFixDependenciesAsync$()$;

yield return new WaitUntil$(()=>$ task.IsCompleted$)$;

if $($task$.$IsCanceled $||$ task.IsFaulted$)$

$\{$

Debug.LogError$("$Firebase initialization error: $"+$ task.Exception$)$;

yield break;

$\}$

else

$\{$

$//$ Firebase initialization successful

usersRef $=$ FirebaseDatabase.DefaultInstance.GetReference$("$Users$")$;

Debug.Log$("$Firebase initialization completed"$)$;

$\}$

$\}$

$//$ Save user data to Firebase

public void SaveUser$()$

$\{$

string username $=$ usernameInput.text;

string password $=$ passwordInput.text;

Dictionary user $=$ new Dictionary$()$;

user$["$username$"]=$ username;

user$["$password$"]=$ password;

string key $=$ usersRef.Push$().$Key;

usersRef.Child$($key$).$UpdateChildrenAsync$($user$)$;

$\}$

$//$ Get user data from Firebase

public void GetData$()$

$\{$

if $($string$.$IsNullOrEmpty$($usernameInput$.$text$))$

$\{$

Debug.LogWarning$("$Username field is empty"$)$;

return;

$\}$

StartCoroutine$($GetUserData$())$;

$\}$

private IEnumerator GetUserData$()$

$\{$

string username $=$ usernameInput.text;

var task $=$ usersRef.Child$($username$).$GetValueAsync$()$;

yield return new WaitUntil$(()=>$ task.IsCompleted$)$;

if $($task$.$IsCanceled $||$ task.IsFaulted$)$

$\{$

Debug.LogError$("$Firebase data retrieval error: $"+$ task.Exception$)$;

yield break;

$\}$

DataSnapshot snapshot $=$ task.Result;

if $(!$snapshot.Exists$)$

$\{$

Debug.LogWarning$("$User data does not exist for the specified username."$)$;

yield break;

$\}$

foreach $($DataSnapshot user in snapshot.Children$)$

$\{$

if $($user$.$Key $==$ "password"$)$

$\{$

Debug.Log$("$Password: $"+$ user.Value.ToString$())$;

$\}$

else if $($user$.$Key $==$ "username"$)$

$\{$

Debug.Log$("$Username: $"+$ user.Value.ToString$())$;

$\}$

$\}$

$\}$

$\}$User data does not exist for the specified username. error