using System;
using Firebase.Auth;
using Google;
using UnityEngine;
using System.Threading.Tasks;
using Firebase.Extensions;
using PlayFab;
using PlayFab.ClientModels;
using UnityEngine.UI;

public class GoogleSignInHandler : MonoBehaviour
{
    private FirebaseAuth auth;
    private GoogleSignInConfiguration configuration;
    [SerializeField] private Button googleSignInButton;
    [SerializeField] private Button guestLoginButton;
    [SerializeField] private Bootstrapper bootstrapper;
    private void OnEnable()
    {
        googleSignInButton.onClick.AddListener(SignInWithGoogle);
        guestLoginButton.onClick.AddListener(GuestLogin);
    }

    private void OnDisable()
    {
        googleSignInButton.onClick.RemoveListener(SignInWithGoogle);
        guestLoginButton.onClick.RemoveListener(GuestLogin);
    }

    void Start()
    {
        PlayFabSettings.staticSettings.TitleId = GameConstants.PlayfabTitleId;
        auth = FirebaseAuth.DefaultInstance;
        configuration = new GoogleSignInConfiguration
        {
            WebClientId = GameConstants.WebClientID,
            RequestEmail = true,
            RequestAuthCode = true,
            RequestIdToken = true
        };
        GoogleSignIn.Configuration = configuration;
        GoogleSignIn.DefaultInstance.EnableDebugLogging(true);
    }

    
    public void GuestLogin()
    {
        Debug.Log("Starting game in Guest Mode...");
        SafePlayerPrefs.SetInt("GuestMode", 1);
        PlayerPrefs.Save();

        googleSignInButton.gameObject.SetActive(false);
        guestLoginButton.gameObject.SetActive(false);

        PlayFabSettings.staticSettings.TitleId = GameConstants.PlayfabTitleId;

        string customId = SystemInfo.deviceUniqueIdentifier;
        SafePlayerPrefs.SetString("GuestCustomID", customId); // Save customId

        var request = new LoginWithCustomIDRequest
        {
            CustomId = customId,
            CreateAccount = true
        };

        PlayFabClientAPI.LoginWithCustomID(request, result =>
            {
                Debug.Log("✅ Guest Login Success! PlayFab ID: " + result.PlayFabId);
                SafePlayerPrefs.SetString("PlayFabID", result.PlayFabId);
                PlayerPrefs.Save();

                if (result.NewlyCreated)
                {
                    SafePlayerPrefs.SetInt("NeedsDisplayNameUpload", 1);
                    PlayerPrefs.Save();
                }
                
                bootstrapper.StartGame();
            },
            error =>
            {
                Debug.LogError("❌ Guest PlayFab login failed: " + error.GenerateErrorReport());
                googleSignInButton.gameObject.SetActive(true);
                guestLoginButton.gameObject.SetActive(true);
            });
    }
    
    private void SignInWithGoogle()
    {
        if (GoogleSignIn.Configuration == null)
        {
            Debug.LogWarning("Google Sign-In Configuration is not set.");
            return;
        }

        GoogleSignIn.DefaultInstance.SignIn().ContinueWith(OnGoogleSignIn);
    }

    private void OnGoogleSignIn(Task<GoogleSignInUser> task)
    {
        if (task.IsFaulted || task.IsCanceled || task.Result == null)
        {
            Debug.LogError("Google Sign-In failed.");
            return;
        }

        // PlayFab uses ServerAuthCode
        var request = new LoginWithGoogleAccountRequest
        {
            TitleId = PlayFabSettings.staticSettings.TitleId,
            ServerAuthCode = task.Result.AuthCode,
            CreateAccount = true
        };
        Debug.Log($"LoginWithGoogleAccount Title {request.TitleId} AuthCode {request.ServerAuthCode}");
        PlayFabClientAPI.LoginWithGoogleAccount(request, OnPlayFabLoginSuccess, OnPlayFabLoginFailure);
        // // Firebase uses ID token
        // var firebaseCredential = GoogleAuthProvider.GetCredential(task.Result.IdToken, null);
        // FirebaseAuth.DefaultInstance.SignInWithCredentialAsync(firebaseCredential).ContinueWith(authTask =>
        // {
        //     if (authTask.IsCompleted && !authTask.IsFaulted)
        //     {
        //         Debug.Log("Firebase sign-in successful");
        //
        //     }
        //     else
        //     {
        //         Debug.LogError("Firebase sign-in failed: " + authTask.Exception);
        //     }
        // });
    }
    private void OnPlayFabLoginSuccess(LoginResult result)
    {
        Debug.Log("PlayFab Login Success! PlayFab ID: " + result.PlayFabId);

        SafePlayerPrefs.SetString("PlayFabID", result.PlayFabId);
        PlayerPrefs.Save();
        bootstrapper.StartGame();
    }

    private void OnPlayFabLoginFailure(PlayFabError error)
    {
        Debug.LogError("PlayFab Login Failed: " + error.GenerateErrorReport());

        googleSignInButton.gameObject.SetActive(true);
        googleSignInButton.interactable = true;
    }
    
}