using System.Collections;
using System.Collections.Generic;
using AppleHills.Data.CardSystem;
using Core;
using Data.CardSystem;
using Pixelplacement;
using UI.Core;
using UnityEngine;
using UnityEngine.UI;

namespace UI.CardSystem
{
    /// <summary>
    /// UI page for opening booster packs and displaying the cards obtained.
    /// </summary>
    public class BoosterOpeningPage : UIPage
    {
        [Header("UI Elements")]
        [SerializeField] private GameObject boosterPackObject;
        [SerializeField] private RectTransform cardRevealContainer; // This should have a HorizontalLayoutGroup component with pre-populated card backs
        [SerializeField] private GameObject cardPrefab;
        [SerializeField] private Button openBoosterButton;
        [SerializeField] private Button continueButton;
        [SerializeField] private CanvasGroup canvasGroup;
        
        [Header("Navigation")]
        [SerializeField] private Button backButton;
        
        [Header("Animation Settings")]
        [SerializeField] private float cardRevealDelay = 0.3f;
        [SerializeField] private float flipAnimationDuration = 0.5f;
        
        // State tracking
        private enum OpeningState
        {
            BoosterReady,
            CardBacksVisible,
            CardsRevealing,
            CardsRevealed,
            MovingToBackpack,
            Completed
        }
        
        private OpeningState _currentState = OpeningState.BoosterReady;
        private List<CardUIElement> _revealedCards = new List<CardUIElement>();
        private List<Button> _cardBackButtons = new List<Button>();
        private List<CardData> _boosterCards = new List<CardData>();
        private int _revealedCardCount = 0;
        private CardSystemManager _cardManager;
        private CardAlbumUI _cardAlbumUI;
        private Coroutine _moveToBackpackCoroutine;

        private void Awake()
        {
            _cardAlbumUI = FindFirstObjectByType<CardAlbumUI>();
            
            // Set up button listeners
            if (openBoosterButton != null)
            {
                openBoosterButton.onClick.AddListener(OnOpenBoosterClicked);
            }
            
            if (continueButton != null)
            {
                continueButton.onClick.AddListener(OnContinueClicked);
                continueButton.gameObject.SetActive(false);
            }
            
            // Set up back button
            if (backButton != null)
            {
                backButton.onClick.AddListener(OnBackButtonClicked);
            }
            
            // Make sure we have a CanvasGroup for transitions
            if (canvasGroup == null)
                canvasGroup = GetComponent<CanvasGroup>();
            if (canvasGroup == null)
                canvasGroup = gameObject.AddComponent<CanvasGroup>();
                
            // Cache card back buttons from container
            CacheCardBackButtons();
            
            // Initially hide all card backs
            HideAllCardBacks();
        }
        
        protected override void OnManagedAwake()
        {
            base.OnManagedAwake();
            
            // Safe to access manager instance here
            _cardManager = CardSystemManager.Instance;
        }
        
        /// <summary>
        /// Cache all card back buttons from the container
        /// </summary>
        private void CacheCardBackButtons()
        {
            _cardBackButtons.Clear();
            
            if (cardRevealContainer != null)
            {
                // Get all buttons in the container (these are our card backs)
                Button[] buttonsInContainer = cardRevealContainer.GetComponentsInChildren<Button>(true);
                _cardBackButtons.AddRange(buttonsInContainer);
                
                Debug.Log($"[BoosterOpeningPage] Found {_cardBackButtons.Count} card back buttons in container");
            }
            else
            {
                Debug.LogError("[BoosterOpeningPage] Card reveal container is null, can't find card backs!");
            }
        }
        
        /// <summary>
        /// Hides all card backs in the container
        /// </summary>
        private void HideAllCardBacks()
        {
            foreach (var cardBack in _cardBackButtons)
            {
                if (cardBack != null && cardBack.gameObject != null)
                {
                    cardBack.gameObject.SetActive(false);
                }
            }
        }
        
        private void OnDestroy()
        {
            // Clean up button listeners
            if (openBoosterButton != null)
            {
                openBoosterButton.onClick.RemoveListener(OnOpenBoosterClicked);
            }
            
            if (continueButton != null)
            {
                continueButton.onClick.RemoveListener(OnContinueClicked);
            }
            
            if (backButton != null)
            {
                backButton.onClick.RemoveListener(OnBackButtonClicked);
            }
            
            // Stop any running coroutines
            if (_moveToBackpackCoroutine != null)
                StopCoroutine(_moveToBackpackCoroutine);
        }
        
        /// <summary>
        /// Handles click on the back button
        /// </summary>
        private void OnBackButtonClicked()
        {
            // Don't allow going back during animations or card reveals
            if (_currentState == OpeningState.CardsRevealing || 
                _currentState == OpeningState.MovingToBackpack)
            {
                return;
            }
            
            // Use the UIPageController to go back to the previous page
            UIPageController pageController = UIPageController.Instance;
            if (pageController != null)
            {
                pageController.PopPage();
            }
        }

        /// <summary>
        /// Resets the page to its initial state when it becomes active
        /// </summary>
        public override void TransitionIn()
        {
            base.TransitionIn();
            
            ResetState();
        }
        
        /// <summary>
        /// Resets the state of the booster opening process
        /// </summary>
        private void ResetState()
        {
            // Clear any previously revealed cards
            foreach (var card in _revealedCards)
            {
                if (card != null && card.gameObject != null)
                    Destroy(card.gameObject);
            }
            _revealedCards.Clear();
            
            // Re-cache card backs in case they changed
            CacheCardBackButtons();
            
            // Reset all card backs - both visibility and scale
            foreach (var cardBack in _cardBackButtons)
            {
                if (cardBack != null && cardBack.gameObject != null)
                {
                    cardBack.gameObject.SetActive(false);
                    cardBack.transform.localScale = Vector3.one; // Reset scale
                    cardBack.transform.localRotation = Quaternion.identity; // Reset rotation
                }
            }
            
            // Reset state
            _currentState = OpeningState.BoosterReady;
            _revealedCardCount = 0;
            _boosterCards.Clear();
            
            // Show booster pack, show open button, hide continue button
            if (boosterPackObject != null)
            {
                boosterPackObject.SetActive(true);
                boosterPackObject.transform.localScale = Vector3.one; // Reset scale
                boosterPackObject.transform.localRotation = Quaternion.identity; // Reset rotation
            }
            
            if (openBoosterButton != null)
            {
                openBoosterButton.gameObject.SetActive(true);
            }
            
            if (continueButton != null)
            {
                continueButton.gameObject.SetActive(false);
                continueButton.transform.localScale = Vector3.one; // Reset scale
            }
            
            // Make back button visible
            if (backButton != null)
            {
                backButton.gameObject.SetActive(true);
            }
            
            Debug.Log("[BoosterOpeningPage] State reset complete, all scales and rotations reset to defaults");
        }
        
        /// <summary>
        /// Handles click on the booster pack to open it
        /// </summary>
        private void OnOpenBoosterClicked()
        {
            if (_currentState != OpeningState.BoosterReady) return;
            
            _currentState = OpeningState.CardBacksVisible;
            
            // Open the booster pack and get the cards
            _boosterCards = _cardManager.OpenBoosterPack();
            
            if (_boosterCards.Count > 0)
            {
                // Hide the booster pack and open button
                if (boosterPackObject != null)
                {
                    // Animate the booster pack opening
                    Tween.LocalScale(boosterPackObject.transform, Vector3.zero, 0.3f, 0f, Tween.EaseInBack, Tween.LoopType.None, null, () => {
                        boosterPackObject.SetActive(false);
                    }, obeyTimescale: false);
                }
                
                if (openBoosterButton != null)
                {
                    openBoosterButton.gameObject.SetActive(false);
                }
                
                // Show card backs first
                StartCoroutine(ShowCardBacks());
            }
            else
            {
                Logging.Warning("[BoosterOpeningPage] No cards were obtained from the booster pack.");
                UIPageController.Instance.PopPage();
            }
        }
        
        /// <summary>
        /// Shows card backs in the reveal positions
        /// </summary>
        private IEnumerator ShowCardBacks()
        {
            // Wait a short delay before showing card backs
            yield return new WaitForSeconds(0.5f);
            
            // Check if we have proper container setup
            if (cardRevealContainer == null)
            {
                Debug.LogError("[BoosterOpeningPage] Card reveal container is null!");
                yield break;
            }
            
            // Check if we found any card backs
            if (_cardBackButtons.Count == 0)
            {
                Debug.LogError("[BoosterOpeningPage] No card back buttons found in container!");
                yield break;
            }
            
            // Determine how many cards to show based on the booster cards and available card backs
            int cardsToShow = Mathf.Min(_boosterCards.Count, _cardBackButtons.Count);
            
            // Activate and animate the card backs
            for (int i = 0; i < cardsToShow; i++)
            {
                Button cardBack = _cardBackButtons[i];
                if (cardBack == null) continue;
                
                GameObject cardBackObj = cardBack.gameObject;
                
                // Ensure the card back is active
                cardBackObj.SetActive(true);
                
                // Store the index for later reference when clicked
                int cardIndex = i;
                
                // Configure the button
                cardBack.onClick.RemoveAllListeners(); // Clear any previous listeners
                cardBack.onClick.AddListener(() => OnCardBackClicked(cardIndex));
                
                // Set initial scale to zero for animation
                cardBackObj.transform.localScale = Vector3.zero;
                
                Debug.Log($"[BoosterOpeningPage] Card back {i} activated");
                
                // Play reveal animation using Pixelplacement.Tween
                Tween.LocalScale(cardBackObj.transform, Vector3.one, 0.5f, 0f, Tween.EaseOutBack, obeyTimescale: false);
                
                // Wait for animation delay
                yield return new WaitForSeconds(cardRevealDelay);
            }
            
            // Update state
            _currentState = OpeningState.CardBacksVisible;
            Debug.Log($"[BoosterOpeningPage] All {cardsToShow} card backs should now be visible");
        }
        
        /// <summary>
        /// Handles click on a card back to reveal the card
        /// </summary>
        private void OnCardBackClicked(int cardIndex)
        {
            Logging.Debug($"[BoosterOpeningPage] Card back clicked at index {cardIndex}");
            
            // Only respond to clicks when in the appropriate state
            if (_currentState != OpeningState.CardBacksVisible)
            {
                Logging.Warning($"[BoosterOpeningPage] Card clicked in wrong state: {_currentState}");
                return;
            }
            
            // Ensure the index is valid
            if (cardIndex < 0 || cardIndex >= _boosterCards.Count || cardIndex >= _cardBackButtons.Count)
            {
                Debug.LogError($"[BoosterOpeningPage] Invalid card index: {cardIndex}");
                return;
            }
            
            // Get the card data and card back
            CardData cardData = _boosterCards[cardIndex];
            Button cardBack = _cardBackButtons[cardIndex];
            
            // Start the reveal animation for this specific card
            StartCoroutine(RevealCard(cardIndex, cardData, cardBack.gameObject));
        }

        /// <summary>
        /// Reveals an individual card with animation
        /// </summary>
        private IEnumerator RevealCard(int cardIndex, CardData cardData, GameObject cardBack)
        {
            if (cardBack == null)
                yield break;

            // Start flip animation
            Transform cardBackTransform = cardBack.transform;

            // Step 1: Flip the card 90 degrees (showing the edge)
            Tween.LocalRotation(cardBackTransform, new Vector3(0, 90, 0), flipAnimationDuration * 0.5f, 0, obeyTimescale: false);

            // Wait for half the flip duration
            yield return new WaitForSeconds(flipAnimationDuration * 0.5f);

            // Step 2: Hide the card back and show the actual card
            cardBack.SetActive(false);

            // Instantiate the card prefab at the same position
            if (cardPrefab != null)
            {
                // Instantiate the card in the same parent as the card back and at the same position
                GameObject cardObj = Instantiate(cardPrefab, cardBack.transform.parent);
                cardObj.transform.SetSiblingIndex(cardBackTransform.GetSiblingIndex()); // Keep the same order in hierarchy
                cardObj.transform.position = cardBackTransform.position; // Same world position

                // Set initial rotation to continue the flip animation
                cardObj.transform.localRotation = Quaternion.Euler(0, 90, 0);

                // Configure the card UI with the card data
                CardUIElement cardUI = cardObj.GetComponent<CardUIElement>();
                if (cardUI != null)
                {
                    cardUI.SetupCard(cardData);
                    _revealedCards.Add(cardUI);

                    // Play special effects based on card rarity
                    PlayRevealEffect(cardObj, cardData.Rarity);
                }

                // Step 3: Finish the flip animation (from 90 degrees to 0)
                Tween.LocalRotation(cardObj.transform, Vector3.zero, flipAnimationDuration * 0.5f, 0, obeyTimescale: false);

                // Increment counter of revealed cards
                _revealedCardCount++;

                // Update state if all cards are revealed
                if (_revealedCardCount >= _boosterCards.Count)
                {
                    _currentState = OpeningState.CardsRevealed;

                    // Show continue button after a short delay
                    StartCoroutine(ShowContinueButton());
                }
            }
        }

        /// <summary>
        /// Plays reveal effect for a card based on its rarity
        /// </summary>
        private void PlayRevealEffect(GameObject cardObject, CardRarity rarity)
        {
            // Add visual effect based on rarity
            if (rarity >= CardRarity.Rare)
            {
                // For rare cards and above, add a particle effect
                var particleSystem = cardObject.GetComponentInChildren<ParticleSystem>();
                if (particleSystem != null)
                {
                    particleSystem.Play();
                }

                // Scale up and down for emphasis
                Transform cardTransform = cardObject.transform;
                Vector3 originalScale = cardTransform.localScale;

                // Sequence: Scale up slightly, then back to normal
                Tween.LocalScale(cardTransform, originalScale * 1.2f, 0.2f, 0.1f, Tween.EaseOutBack, obeyTimescale: false);
                Tween.LocalScale(cardTransform, originalScale, 0.15f, 0.3f, Tween.EaseIn, obeyTimescale: false);

                // Play sound effect based on rarity (if available)
                // This would require audio source components to be set up
            }
        }

        /// <summary>
        /// Shows the continue button after all cards are revealed
        /// </summary>
        private IEnumerator ShowContinueButton()
        {
            // Wait for a moment to let the user see all cards
            yield return new WaitForSeconds(1.0f);

            if (continueButton != null)
            {
                // Show the continue button with a nice animation
                continueButton.gameObject.SetActive(true);
                continueButton.transform.localScale = Vector3.zero;

                Tween.LocalScale(continueButton.transform, Vector3.one, 0.3f, 0f, Tween.EaseOutBack, obeyTimescale: false);
            }
        }

        /// <summary>
        /// Handles click on the continue button
        /// </summary>
        private void OnContinueClicked()
        {
            if (_currentState != OpeningState.CardsRevealed) return;

            _currentState = OpeningState.MovingToBackpack;

            // Hide continue button
            if (continueButton != null)
            {
                continueButton.gameObject.SetActive(false);
            }

            // Hide back button during transition
            if (backButton != null)
            {
                backButton.gameObject.SetActive(false);
            }

            // Start animation to move cards to backpack
            _moveToBackpackCoroutine = StartCoroutine(MoveCardsToBackpack());
        }

        /// <summary>
        /// Animates cards moving to the backpack icon
        /// </summary>
        private IEnumerator MoveCardsToBackpack()
        {
            // Find the backpack button GameObject
            GameObject backpackButton = null;
            Transform backpackTransform = null;
            
            if (_cardAlbumUI != null && _cardAlbumUI.BackpackIcon != null)
            {
                // Get the backpack icon
                GameObject backpackIcon = _cardAlbumUI.BackpackIcon;
                backpackTransform = backpackIcon.transform;
                
                // Find the parent button that controls visibility
                backpackButton = backpackIcon.transform.parent.gameObject;
                
                // Make sure the backpack button is visible for the animation
                if (backpackButton != null)
                {
                    backpackButton.SetActive(true);
                    Debug.Log("[BoosterOpeningPage] Made backpack button visible for animation");
                }
            }
            
            if (backpackTransform == null)
            {
                // If no backpack is found, just return to the menu
                UIPageController.Instance.PopPage();
                yield break;
            }
            
            // Speed up the animation by reducing the delay
            float animationDuration = 0.3f; // Faster animation duration
            float cardDelay = 0.15f; // Even shorter delay between cards
            
            // Move each card to the backpack with slight delay between cards
            for (int i = 0; i < _revealedCards.Count; i++)
            {
                CardUIElement card = _revealedCards[i];
                if (card != null)
                {
                    // Get the world position of the backpack
                    Vector3 backpackWorldPos = backpackTransform.position;
                    
                    // Convert to local space of the card's parent for Tween
                    Vector3 targetPos = card.transform.parent.InverseTransformPoint(backpackWorldPos);
                    
                    // Start the move animation - ensure no cancellation between animations
                    Tween.LocalPosition(card.transform, targetPos, animationDuration, cardDelay * i, Tween.EaseInOut, obeyTimescale: false);
                    Tween.LocalScale(card.transform, Vector3.zero, animationDuration, cardDelay * i, Tween.EaseIn, obeyTimescale: false);
                    
                    Debug.Log($"[BoosterOpeningPage] Starting animation for card {i}");
                }
                
                // Only wait after starting each animation (don't wait after the last one)
                if (i < _revealedCards.Count - 1)
                {
                    yield return new WaitForSeconds(cardDelay);
                }
            }
            
            // Calculate total animation time and wait for it to complete
            float totalAnimationTime = cardDelay * (_revealedCards.Count - 1) + animationDuration;
            yield return new WaitForSeconds(totalAnimationTime + 0.1f); // Small buffer to ensure animations complete
            
            // The backpack visibility will be handled by CardAlbumUI's OnPageChanged after popping this page
            // We don't need to explicitly hide it here as the system will handle it properly
            
            // Update state
            _currentState = OpeningState.Completed;
            
            // Return to the menu
            UIPageController.Instance.PopPage();
        }

        /// <summary>
        /// Override for transition in animation using Pixelplacement.Tween
        /// </summary>
        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();
            }
        }

        /// <summary>
        /// Override for transition out animation using Pixelplacement.Tween
        /// </summary>
        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();
            }
        }

        /// <summary>
        /// OnEnable override to ensure proper initialization
        /// </summary>
        private void OnEnable()
        {
            if (_cardManager == null)
            {
                _cardManager = CardSystemManager.Instance;
            }
            
            if (_cardAlbumUI == null)
            {
                _cardAlbumUI = FindFirstObjectByType<CardAlbumUI>();
            }
            
            // Re-cache card backs in case they changed while disabled
            CacheCardBackButtons();
        }
    }
}