using Bootstrap;
using Data.CardSystem;
using Pixelplacement;
using UI.Core;
using UnityEngine;
using UnityEngine.UI;

namespace UI.CardSystem
{
    /// <summary>
    /// UI page for viewing the player's card collection in an album.
    /// Manages booster pack button visibility and opening flow.
    /// </summary>
    public class AlbumViewPage : UIPage
    {
        [Header("UI References")]
        [SerializeField] private CanvasGroup canvasGroup;
        [SerializeField] private Button exitButton;
        [SerializeField] private BookCurlPro.BookPro book;
        
        [Header("Booster Pack UI")]
        [SerializeField] private GameObject[] boosterPackButtons;
        [SerializeField] private BoosterOpeningPage boosterOpeningPage;
        
        private Input.InputMode _previousInputMode;

        private void Awake()
        {
            // Make sure we have a CanvasGroup for transitions
            if (canvasGroup == null)
                canvasGroup = GetComponent<CanvasGroup>();
            if (canvasGroup == null)
                canvasGroup = gameObject.AddComponent<CanvasGroup>();
            
            // Set up exit button
            if (exitButton != null)
            {
                exitButton.onClick.AddListener(OnExitButtonClicked);
            }
            
            // Set up booster pack button listeners
            SetupBoosterButtonListeners();
            
            // Register for post-boot initialization
            BootCompletionService.RegisterInitAction(InitializePostBoot);
            
            // UI pages should start disabled
            gameObject.SetActive(false);
        }
        
        private void InitializePostBoot()
        {
            // Subscribe to CardSystemManager events
            if (CardSystemManager.Instance != null)
            {
                CardSystemManager.Instance.OnBoosterCountChanged += OnBoosterCountChanged;
                
                // Update initial button visibility
                int initialCount = CardSystemManager.Instance.GetBoosterPackCount();
                UpdateBoosterButtons(initialCount);
            }
        }
        
        private void SetupBoosterButtonListeners()
        {
            if (boosterPackButtons == null) return;
            
            for (int i = 0; i < boosterPackButtons.Length; i++)
            {
                if (boosterPackButtons[i] == null) continue;
                
                Button button = boosterPackButtons[i].GetComponent<Button>();
                if (button != null)
                {
                    button.onClick.AddListener(OnBoosterButtonClicked);
                }
            }
        }

        private void OnDestroy()
        {
            // Unsubscribe from CardSystemManager
            if (CardSystemManager.Instance != null)
            {
                CardSystemManager.Instance.OnBoosterCountChanged -= OnBoosterCountChanged;
            }
            
            // Clean up exit button
            if (exitButton != null)
            {
                exitButton.onClick.RemoveListener(OnExitButtonClicked);
            }
            
            // Clean up booster button listeners
            if (boosterPackButtons != null)
            {
                foreach (var buttonObj in boosterPackButtons)
                {
                    if (buttonObj == null) continue;
                    
                    Button button = buttonObj.GetComponent<Button>();
                    if (button != null)
                    {
                        button.onClick.RemoveListener(OnBoosterButtonClicked);
                    }
                }
            }
        }

        private void OnExitButtonClicked()
        {
            if (book != null && book.CurrentPaper != 1)
            {
                // Not on page 0, flip to page 0 first
                BookCurlPro.AutoFlip autoFlip = book.GetComponent<BookCurlPro.AutoFlip>();
                if (autoFlip == null)
                {
                    autoFlip = book.gameObject.AddComponent<BookCurlPro.AutoFlip>();
                }
                
                autoFlip.enabled = true;
                autoFlip.StartFlipping(1);
            }
            else
            {
                // Already on page 0 or no book reference, exit
                // Restore input mode before popping
                if (Input.InputManager.Instance != null)
                {
                    Input.InputManager.Instance.SetInputMode(_previousInputMode);
                    Debug.Log($"[AlbumViewPage] Restored input mode to {_previousInputMode} on exit");
                }
                
                if (UIPageController.Instance != null)
                {
                    UIPageController.Instance.PopPage();
                }
            }
        }
        
        private void OnBoosterCountChanged(int newCount)
        {
            UpdateBoosterButtons(newCount);
        }
        
        private void UpdateBoosterButtons(int boosterCount)
        {
            if (boosterPackButtons == null || boosterPackButtons.Length == 0) return;
            
            int visibleCount = Mathf.Min(boosterCount, boosterPackButtons.Length);
            
            for (int i = 0; i < boosterPackButtons.Length; i++)
            {
                if (boosterPackButtons[i] != null)
                {
                    boosterPackButtons[i].SetActive(i < visibleCount);
                }
            }
        }
        
        private void OnBoosterButtonClicked()
        {
            if (boosterOpeningPage != null && UIPageController.Instance != null)
            {
                // Pass current booster count to the opening page
                int boosterCount = CardSystemManager.Instance?.GetBoosterPackCount() ?? 0;
                boosterOpeningPage.SetAvailableBoosterCount(boosterCount);
                
                UIPageController.Instance.PushPage(boosterOpeningPage);
            }
        }
        
        public override void TransitionIn()
        {
            // Only store and switch input mode if this is the first time entering
            // (when _previousInputMode hasn't been set yet)
            if (Input.InputManager.Instance != null)
            {
                // Store the current input mode before switching
                _previousInputMode = Input.InputMode.GameAndUI;
                Input.InputManager.Instance.SetInputMode(Input.InputMode.UI);
                Debug.Log("[AlbumViewPage] Switched to UI-only input mode on first entry");
            }
            
            base.TransitionIn();
        }
        
        public override void TransitionOut()
        {
            // Don't restore input mode here - only restore when actually exiting (in OnExitButtonClicked)
            base.TransitionOut();
        }

        protected override void DoTransitionIn(System.Action onComplete)
        {
            // Simple fade in animation
            if (canvasGroup != null)
            {
                canvasGroup.alpha = 0f;
                Tween.Value(0f, 1f, (value) => canvasGroup.alpha = value, transitionDuration, 0f, Tween.EaseInOut, Tween.LoopType.None, null, onComplete, obeyTimescale: false);
            }
            else
            {
                // Fallback if no CanvasGroup
                onComplete?.Invoke();
            }
        }

        protected override void DoTransitionOut(System.Action onComplete)
        {
            // Simple fade out animation
            if (canvasGroup != null)
            {
                Tween.Value(canvasGroup.alpha, 0f, (value) => canvasGroup.alpha = value, transitionDuration, 0f, Tween.EaseInOut, Tween.LoopType.None, null, onComplete, obeyTimescale: false);
            }
            else
            {
                // Fallback if no CanvasGroup
                onComplete?.Invoke();
            }
        }
    }
}