using UnityEngine;
using UnityEngine.UI;
using TMPro;

using RR.Game2D.Core.Managers;
using RR.Common.Settings;

namespace RR.Common.UI
{
    public class MainMenu : MonoBehaviour
    {
        [Header("Кнопки")]
        [SerializeField] private Button newGameButton;
        [SerializeField] private Button quitButton;

        [Header("Тексты")] 
        [SerializeField] private TextMeshProUGUI paymentText;

        private RR.Common.Managers.PaymentManager _paymentManager;
        private RR.Common.Settings.SettingsManager _settingsManager;
        
        private void Start()
        {
            _paymentManager = RR.Common.Managers.PaymentManager.Instance;
            _settingsManager = RR.Common.Settings.SettingsManager.Instance;
            
            Bootstrap();

            if (Application.platform == RuntimePlatform.WebGLPlayer) 
            {
                quitButton.gameObject.SetActive(false);
            }
            
            if (_paymentManager != null) 
                _paymentManager.OnCreditsChanged.AddListener(OnCreditsChanged);
            
            if (_settingsManager != null)
            {
                _settingsManager.OnSettingsLoaded += OnSettingsChanged;
                _settingsManager.OnSettingsSaved += OnSettingsChanged;
            }
        }

        private void OnDestroy()
        {
            if (_paymentManager != null) 
                _paymentManager.OnCreditsChanged.RemoveListener(OnCreditsChanged);
            
            if (_settingsManager != null)
            {
                _settingsManager.OnSettingsLoaded -= OnSettingsChanged;
                _settingsManager.OnSettingsSaved -= OnSettingsChanged;
            }
        }

        /// <summary>
        /// Метод для загрузки элементов сцены.
        /// Вешает события на кнопки
        /// </summary>
        private void Bootstrap()
        {
            if (newGameButton)
            {
                newGameButton.onClick.AddListener(OnNewGame);
                // Устанавливаем начальное состояние кнопки
                UpdatePlayButtonState();
            }
            if (quitButton) quitButton.onClick.AddListener(OnQuit);
        }

        /// <summary>
        /// Метод начала новой игры
        /// </summary>
        private static void OnNewGame()
        {
            GameManager.Instance.NewGame();
        }

        /// <summary>
        /// Метод выхода из игры
        /// </summary>
        private static void OnQuit()
        {
            Application.Quit();
        }
        
        private void OnCreditsChanged(int credits)
        {
            UpdatePlayButtonState(credits);
        }
        
        private void OnSettingsChanged()
        {
            UpdatePlayButtonState();
        }
        
        private void UpdatePlayButtonState(int credits = -1)
        {
            if (credits < 0)
                credits = _paymentManager?.CreditsCount ?? 0;
            
            // Проверяем только через SettingsManager, так как PaymentManager обновляется с задержкой
            if (_settingsManager != null && _settingsManager.GetBool("payment.freeGame"))
            {
                newGameButton.interactable = true;
                paymentText.gameObject.SetActive(false);
                return;
            }
            
            paymentText.gameObject.SetActive(true);

            if (!newGameButton) return;
            bool canStartGame = credits >= 1;
            newGameButton.interactable = canStartGame;
            paymentText.gameObject.SetActive(!canStartGame);
        }
    }
}