using System;
using AppleHills.Data.CardSystem;
using Pixelplacement;
using Pixelplacement.TweenSystem;
using UnityEngine;
using UnityEngine.EventSystems;

namespace UI.CardSystem
{
    /// <summary>
    /// Flippable card wrapper that shows a card back, then flips to reveal the CardDisplay front.
    /// This component nests an existing CardDisplay prefab to reuse card visuals everywhere.
    /// </summary>
    public class FlippableCard : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler, IPointerClickHandler
    {
        [Header("Card References")]
        [SerializeField] private GameObject cardBackObject; // The card back visual
        [SerializeField] private GameObject cardFrontObject; // Your CardDisplay prefab instance
        [SerializeField] private CardDisplay cardDisplay; // Reference to CardDisplay component
        [SerializeField] private AlbumCard albumCard; // Reference to nested AlbumCard (for album placement flow)
        
        [Header("Idle Hover Animation")]
        [SerializeField] private bool enableIdleHover = true;
        [SerializeField] private float idleHoverHeight = 10f;
        [SerializeField] private float idleHoverDuration = 1.5f;
        [SerializeField] private float hoverScaleMultiplier = 1.05f;
        
        [Header("Flip Animation")]
        [SerializeField] private float flipDuration = 0.6f;
        [SerializeField] private float flipScalePunch = 1.1f;
        
        [Header("New/Repeat Card Display")]
        [SerializeField] private GameObject newCardText;
        [SerializeField] private GameObject newCardIdleText;
        [SerializeField] private GameObject repeatText;
        [SerializeField] private GameObject progressBarContainer;
        [SerializeField] private int cardsToUpgrade = 5;
        [SerializeField] private float enlargedScale = 1.5f;
        
        // State
        private bool _isFlipped = false;
        private bool _isFlipping = false;
        private bool _isHovering = false;
        private TweenBase _idleHoverTween;
        private CardData _cardData;
        private Vector2 _originalPosition; // Track original spawn position
        private bool _isWaitingForTap = false; // Waiting for tap after reveal
        private bool _isNew = false; // Is this a new card
        private int _ownedCount = 0; // Owned count for repeat cards
        private bool _isClickable = true; // Can this card be clicked
        
        // Events
        public event Action<FlippableCard, CardData> OnCardRevealed;
        public event Action<FlippableCard> OnCardTappedAfterReveal;
        public event Action<FlippableCard> OnClickedWhileInactive; // Fired when clicked but not clickable
        public event Action<FlippableCard> OnFlipStarted; // Fired when flip animation begins
        
        public bool IsFlipped => _isFlipped;
        public CardData CardData => _cardData;
        public int CardsToUpgrade => cardsToUpgrade; // Expose upgrade threshold
        
        private void Awake()
        {
            // Auto-find CardDisplay if not assigned
            if (cardDisplay == null && cardFrontObject != null)
            {
                cardDisplay = cardFrontObject.GetComponent<CardDisplay>();
            }
            
            // Auto-find AlbumCard if not assigned
            if (albumCard == null)
            {
                albumCard = GetComponentInChildren<AlbumCard>();
            }
            
            // Card back: starts at 0° rotation (normal, facing camera, clickable)
            // Card front: starts at 180° rotation (flipped away, will rotate to 0° when revealed)
            if (cardBackObject != null)
            {
                cardBackObject.transform.localRotation = Quaternion.Euler(0, 0, 0);
                cardBackObject.SetActive(true);
            }
            
            if (cardFrontObject != null)
            {
                cardFrontObject.transform.localRotation = Quaternion.Euler(0, 180, 0);
                cardFrontObject.SetActive(false);
            }
            
            // Hide all new/repeat UI elements initially
            if (newCardText != null)
                newCardText.SetActive(false);
            if (newCardIdleText != null)
                newCardIdleText.SetActive(false);
            if (repeatText != null)
                repeatText.SetActive(false);
            if (progressBarContainer != null)
                progressBarContainer.SetActive(false);
        }
        
        private void Start()
        {
            // Save the original position so we can return to it after hover
            RectTransform rectTransform = GetComponent<RectTransform>();
            if (rectTransform != null)
            {
                _originalPosition = rectTransform.anchoredPosition;
            }
            
            // Start idle hover animation
            if (enableIdleHover && !_isFlipped)
            {
                StartIdleHover();
            }
        }
        
        /// <summary>
        /// Setup the card data (stores it but doesn't reveal until flipped)
        /// </summary>
        public void SetupCard(CardData data)
        {
            _cardData = data;
            
            // Setup the CardDisplay but keep it hidden
            if (cardDisplay != null)
            {
                cardDisplay.SetupCard(data);
            }
        }
        
        /// <summary>
        /// Flip the card to reveal the front
        /// </summary>
        public void FlipToReveal()
        {
            if (_isFlipped || _isFlipping)
                return;
            
            _isFlipping = true;
            
            // Fire flip started event IMMEDIATELY (before animations)
            OnFlipStarted?.Invoke(this);
            
            // Stop idle hover
            StopIdleHover();
            
            // Flip animation: Rotate the visual children (back from 0→90, front from 180→0)
            // ...existing code...
            // Card back: 0° → 90° (rotates away)
            // Card front: 180° → 90° → 0° (rotates into view)
            
            // Phase 1: Rotate both to 90 degrees (edge view)
            if (cardBackObject != null)
            {
                Tween.LocalRotation(cardBackObject.transform, Quaternion.Euler(0, 90, 0), flipDuration * 0.5f, 0f, Tween.EaseInOut);
            }
            
            if (cardFrontObject != null)
            {
                Tween.LocalRotation(cardFrontObject.transform, Quaternion.Euler(0, 90, 0), flipDuration * 0.5f, 0f, Tween.EaseInOut,
                    completeCallback: () =>
                    {
                        // At edge (90°), switch visibility
                        if (cardBackObject != null)
                            cardBackObject.SetActive(false);
                        if (cardFrontObject != null)
                            cardFrontObject.SetActive(true);
                        
                        // Phase 2: Rotate front from 90 to 0 (show at correct orientation)
                        Tween.LocalRotation(cardFrontObject.transform, Quaternion.Euler(0, 0, 0), flipDuration * 0.5f, 0f, Tween.EaseInOut,
                            completeCallback: () =>
                            {
                                _isFlipped = true;
                                _isFlipping = false;
                                
                                // Fire revealed event
                                OnCardRevealed?.Invoke(this, _cardData);
                            });
                    });
            }
            
            // Scale punch during flip for extra juice
            Vector3 originalScale = transform.localScale;
            Tween.LocalScale(transform, originalScale * flipScalePunch, flipDuration * 0.5f, 0f, Tween.EaseOutBack,
                completeCallback: () =>
                {
                    Tween.LocalScale(transform, originalScale, flipDuration * 0.5f, 0f, Tween.EaseInBack);
                });
        }
        
        /// <summary>
        /// Start idle hover animation (gentle bobbing)
        /// </summary>
        private void StartIdleHover()
        {
            if (_idleHoverTween != null)
                return;
            
            RectTransform rectTransform = GetComponent<RectTransform>();
            if (rectTransform == null)
                return;
            
            Vector2 originalPos = rectTransform.anchoredPosition;
            Vector2 targetPos = originalPos + Vector2.up * idleHoverHeight;
            
            _idleHoverTween = Tween.Value(0f, 1f, 
                (val) => 
                {
                    if (rectTransform != null)
                    {
                        float t = Mathf.Sin(val * Mathf.PI * 2f) * 0.5f + 0.5f; // Smooth sine wave
                        rectTransform.anchoredPosition = Vector2.Lerp(originalPos, targetPos, t);
                    }
                }, 
                idleHoverDuration, 0f, Tween.EaseInOut, Tween.LoopType.Loop);
        }
        
        /// <summary>
        /// Stop idle hover animation
        /// </summary>
        private void StopIdleHover()
        {
            if (_idleHoverTween != null)
            {
                _idleHoverTween.Stop();
                _idleHoverTween = null;
                
                // Reset to ORIGINAL position (not Vector2.zero!)
                RectTransform rectTransform = GetComponent<RectTransform>();
                if (rectTransform != null)
                {
                    Tween.AnchoredPosition(rectTransform, _originalPosition, 0.3f, 0f, Tween.EaseOutBack);
                }
            }
        }
        
        #region Pointer Event Handlers
        
        public void OnPointerEnter(PointerEventData eventData)
        {
            if (_isFlipped || _isFlipping)
                return;
            
            _isHovering = true;
            
            // Scale up slightly on hover
            Tween.LocalScale(transform, Vector3.one * hoverScaleMultiplier, 0.2f, 0f, Tween.EaseOutBack);
        }
        
        public void OnPointerExit(PointerEventData eventData)
        {
            if (_isFlipped || _isFlipping)
                return;
            
            _isHovering = false;
            
            // Scale back to normal
            Tween.LocalScale(transform, Vector3.one, 0.2f, 0f, Tween.EaseOutBack);
        }
        
        public void OnPointerClick(PointerEventData eventData)
        {
            Debug.Log($"[CLICK-TRACE-FLIPPABLE] OnPointerClick on {name}, _isClickable={_isClickable}, _isWaitingForTap={_isWaitingForTap}, _isFlipped={_isFlipped}, position={eventData.position}");
            
            // If not clickable, notify and return
            if (!_isClickable)
            {
                Debug.Log($"[CLICK-TRACE-FLIPPABLE] {name} - Not clickable, firing OnClickedWhileInactive");
                OnClickedWhileInactive?.Invoke(this);
                return;
            }
            
            // If waiting for tap after reveal, handle that
            if (_isWaitingForTap)
            {
                Debug.Log($"[CLICK-TRACE-FLIPPABLE] {name} - Waiting for tap, dismissing enlarged state");
                OnCardTappedAfterReveal?.Invoke(this);
                _isWaitingForTap = false;
                return;
            }
            
            if (_isFlipped || _isFlipping)
            {
                Debug.Log($"[CLICK-TRACE-FLIPPABLE] {name} - Ignoring click (flipped={_isFlipped}, flipping={_isFlipping})");
                return;
            }
            
            Debug.Log($"[CLICK-TRACE-FLIPPABLE] {name} - Processing click, starting flip");
            // Flip on click
            FlipToReveal();
        }
        
        #endregion
        
        #region New/Repeat Card Display
        
        /// <summary>
        /// Show this card as a new card (enlarge, show "NEW CARD" text, wait for tap)
        /// </summary>
        public void ShowAsNew()
        {
            _isNew = true;
            _isWaitingForTap = true;
            
            // Show new card text
            if (newCardText != null)
                newCardText.SetActive(true);
            
            // Enlarge the card
            EnlargeCard();
        }
        
        /// <summary>
        /// Show this card as a repeat that will trigger an upgrade (enlarge, show progress, auto-transition to upgrade)
        /// </summary>
        /// <param name="ownedCount">Number of copies owned BEFORE this one</param>
        /// <param name="lowerRarityCard">The existing card data at lower rarity (for upgrade reference)</param>
        public void ShowAsRepeatWithUpgrade(int ownedCount, AppleHills.Data.CardSystem.CardData lowerRarityCard)
        {
            _isNew = false;
            _ownedCount = ownedCount;
            _isWaitingForTap = false; // Don't wait yet - upgrade will happen automatically
            
            // Show repeat text
            if (repeatText != null)
                repeatText.SetActive(true);
            
            // Enlarge the card
            EnlargeCard();
            
            // Show progress bar with owned count, then auto-trigger upgrade
            ShowProgressBar(ownedCount, () =>
            {
                // Progress animation complete - trigger upgrade!
                TriggerUpgradeTransition(lowerRarityCard);
            });
        }
        
        /// <summary>
        /// Trigger the upgrade transition (called after progress bar fills)
        /// </summary>
        private void TriggerUpgradeTransition(AppleHills.Data.CardSystem.CardData lowerRarityCard)
        {
            Debug.Log($"[FlippableCard] Triggering upgrade transition from {lowerRarityCard.Rarity}!");
            
            AppleHills.Data.CardSystem.CardRarity oldRarity = lowerRarityCard.Rarity;
            AppleHills.Data.CardSystem.CardRarity newRarity = oldRarity + 1;
            
            // Reset the lower rarity count to 0
            lowerRarityCard.CopiesOwned = 0;
            
            // Create upgraded card data
            AppleHills.Data.CardSystem.CardData upgradedCardData = new AppleHills.Data.CardSystem.CardData(_cardData);
            upgradedCardData.Rarity = newRarity;
            upgradedCardData.CopiesOwned = 1;
            
            // Check if we already have this card at the higher rarity
            bool isNewAtHigherRarity = Data.CardSystem.CardSystemManager.Instance.IsCardNew(upgradedCardData, out AppleHills.Data.CardSystem.CardData existingHigherRarity);
            
            // Add the higher rarity card to inventory
            Data.CardSystem.CardSystemManager.Instance.GetCardInventory().AddCard(upgradedCardData);
            
            // Update our displayed card data
            _cardData.Rarity = newRarity;
            
            // Transition to appropriate display
            if (isNewAtHigherRarity || newRarity == AppleHills.Data.CardSystem.CardRarity.Legendary)
            {
                // Show as NEW at higher rarity
                TransitionToNewCardView(newRarity);
            }
            else
            {
                // Show progress for higher rarity, then transition to NEW
                int ownedAtHigherRarity = existingHigherRarity.CopiesOwned;
                ShowProgressBar(ownedAtHigherRarity, () =>
                {
                    TransitionToNewCardView(newRarity);
                });
            }
        }
        
        /// <summary>
        /// Show this card as a repeat (enlarge, show progress bar, wait for tap)
        /// </summary>
        /// <param name="ownedCount">Number of copies owned BEFORE this one</param>
        public void ShowAsRepeat(int ownedCount)
        {
            _isNew = false;
            _ownedCount = ownedCount;
            _isWaitingForTap = true;
            
            // Show repeat text
            if (repeatText != null)
                repeatText.SetActive(true);
            
            // Enlarge the card
            EnlargeCard();
            
            // Show progress bar with owned count, then blink new element
            ShowProgressBar(ownedCount, () =>
            {
                // Progress animation complete
            });
        }
        
        /// <summary>
        /// Show this card as upgraded (hide progress bar, show as new with upgraded rarity)
        /// </summary>
        public void ShowAsUpgraded(AppleHills.Data.CardSystem.CardRarity oldRarity, AppleHills.Data.CardSystem.CardRarity newRarity)
        {
            _isNew = true;
            _isWaitingForTap = true;
            
            // Update the CardDisplay to show new rarity
            if (cardDisplay != null && _cardData != null)
            {
                _cardData.Rarity = newRarity;
                cardDisplay.SetupCard(_cardData);
            }
            
            // Hide progress bar and repeat text
            if (progressBarContainer != null)
                progressBarContainer.SetActive(false);
            if (repeatText != null)
                repeatText.SetActive(false);
            
            // Show new card text (it's now a "new" card at the higher rarity)
            if (newCardText != null)
                newCardText.SetActive(true);
            
            Debug.Log($"[FlippableCard] Card upgraded from {oldRarity} to {newRarity}! Showing as NEW.");
            
            // Card is already enlarged from the repeat display, so no need to enlarge again
        }
        
        /// <summary>
        /// Show this card as upgraded with progress bar (already have copies at higher rarity)
        /// </summary>
        public void ShowAsUpgradedWithProgress(AppleHills.Data.CardSystem.CardRarity oldRarity, AppleHills.Data.CardSystem.CardRarity newRarity, int ownedAtNewRarity)
        {
            _isNew = false;
            _isWaitingForTap = false; // Don't wait for tap yet, progress bar will complete first
            
            // Hide new card text
            if (newCardText != null)
                newCardText.SetActive(false);
            
            // Show repeat text (it's a repeat at the new rarity)
            if (repeatText != null)
                repeatText.SetActive(true);
            
            // Show progress bar for the new rarity
            ShowProgressBar(ownedAtNewRarity, () =>
            {
                // Progress animation complete - now transition to "NEW CARD" view
                TransitionToNewCardView(newRarity);
            });
            
            Debug.Log($"[FlippableCard] Card upgraded from {oldRarity} to {newRarity}! Showing progress {ownedAtNewRarity}/5");
        }
        
        /// <summary>
        /// Transition to "NEW CARD" view after upgrade progress completes
        /// </summary>
        private void TransitionToNewCardView(AppleHills.Data.CardSystem.CardRarity newRarity)
        {
            Debug.Log($"[FlippableCard] Transitioning to NEW CARD view at {newRarity} rarity");
            
            // Update the CardDisplay to show new rarity
            if (cardDisplay != null && _cardData != null)
            {
                _cardData.Rarity = newRarity;
                cardDisplay.SetupCard(_cardData);
            }
            
            // Hide progress bar and repeat text
            if (progressBarContainer != null)
                progressBarContainer.SetActive(false);
            if (repeatText != null)
                repeatText.SetActive(false);
            
            // Show "NEW CARD" text
            if (newCardText != null)
                newCardText.SetActive(true);
            
            // Now wait for tap
            _isNew = true;
            _isWaitingForTap = true;
            
            Debug.Log($"[FlippableCard] Now showing as NEW CARD at {newRarity}, waiting for tap");
        }
        
        /// <summary>
        /// Enlarge the card
        /// </summary>
        private void EnlargeCard()
        {
            Tween.LocalScale(transform, Vector3.one * enlargedScale, 0.3f, 0f, Tween.EaseOutBack);
        }
        
        /// <summary>
        /// Return card to normal size
        /// </summary>
        public void ReturnToNormalSize()
        {
            Tween.LocalScale(transform, Vector3.one, 0.3f, 0f, Tween.EaseOutBack, completeCallback: () =>
            {
                // After returning to normal, hide new card text, show idle text
                if (_isNew)
                {
                    if (newCardText != null)
                        newCardText.SetActive(false);
                    if (newCardIdleText != null)
                        newCardIdleText.SetActive(true);
                }
                
                // Keep repeat text visible
            });
        }
        
        /// <summary>
        /// Show progress bar with owned count, then blink the new element
        /// </summary>
        private void ShowProgressBar(int ownedCount, System.Action onComplete)
        {
            if (progressBarContainer == null)
            {
                onComplete?.Invoke();
                return;
            }
            
            progressBarContainer.SetActive(true);
            
            // Get all child Image components
            UnityEngine.UI.Image[] progressElements = progressBarContainer.GetComponentsInChildren<UnityEngine.UI.Image>(true);
            
            // Check if we have the required number of elements (should match cardsToUpgrade)
            if (progressElements.Length < cardsToUpgrade)
            {
                Debug.LogWarning($"[FlippableCard] Not enough Image components in progress bar! Expected {cardsToUpgrade}, found {progressElements.Length}");
                onComplete?.Invoke();
                return;
            }
            
            // Disable all elements first
            foreach (var img in progressElements)
            {
                img.enabled = false;
            }
            
            // Show owned count (from the END, going backwards)
            // E.g., if owned 3 cards, enable elements at index [4], [3], [2] (last 3 elements)
            int startIndex = Mathf.Max(0, cardsToUpgrade - ownedCount);
            for (int i = startIndex; i < cardsToUpgrade && i < progressElements.Length; i++)
            {
                progressElements[i].enabled = true;
            }
            
            // Wait a moment, then blink the new element
            // New element is at index (cardsToUpgrade - ownedCount - 1)
            int newElementIndex = Mathf.Max(0, cardsToUpgrade - ownedCount - 1);
            if (newElementIndex >= 0 && newElementIndex < progressElements.Length)
            {
                Tween.Value(0f, 1f, (val) => { }, 0.3f, 0f, completeCallback: () =>
                {
                    BlinkProgressElement(newElementIndex, progressElements, onComplete);
                });
            }
            else
            {
                onComplete?.Invoke();
            }
        }
        
        /// <summary>
        /// Blink a progress element (enable/disable rapidly)
        /// </summary>
        private void BlinkProgressElement(int index, UnityEngine.UI.Image[] elements, System.Action onComplete)
        {
            if (index < 0 || index >= elements.Length)
            {
                onComplete?.Invoke();
                return;
            }
            
            UnityEngine.UI.Image element = elements[index];
            int blinkCount = 0;
            const int maxBlinks = 3;
            
            void Blink()
            {
                element.enabled = !element.enabled;
                blinkCount++;
                
                if (blinkCount >= maxBlinks * 2)
                {
                    element.enabled = true; // End on enabled
                    onComplete?.Invoke();
                }
                else
                {
                    Tween.Value(0f, 1f, (val) => { }, 0.15f, 0f, completeCallback: Blink);
                }
            }
            
            Blink();
        }
        
        /// <summary>
        /// Enable or disable clickability of this card
        /// </summary>
        public void SetClickable(bool clickable)
        {
            _isClickable = clickable;
        }
        
        /// <summary>
        /// Jiggle the card (shake animation)
        /// </summary>
        public void Jiggle()
        {
            // Quick shake animation - rotate left, then right, then center
            Transform cardTransform = transform;
            Quaternion originalRotation = cardTransform.localRotation;
            
            // Shake sequence: 0 -> -5 -> +5 -> 0
            Tween.LocalRotation(cardTransform, Quaternion.Euler(0, 0, -5), 0.05f, 0f, Tween.EaseInOut,
                completeCallback: () =>
                {
                    Tween.LocalRotation(cardTransform, Quaternion.Euler(0, 0, 5), 0.1f, 0f, Tween.EaseInOut,
                        completeCallback: () =>
                        {
                            Tween.LocalRotation(cardTransform, originalRotation, 0.05f, 0f, Tween.EaseInOut);
                        });
                });
        }
        
        /// <summary>
        /// Extract the nested AlbumCard and reparent it to a new parent
        /// Used when placing card in album slot - extracts the AlbumCard from this wrapper
        /// The caller is responsible for tweening it to the final position
        /// </summary>
        /// <param name="newParent">The transform to reparent the AlbumCard to (typically the AlbumCardSlot)</param>
        /// <returns>The extracted AlbumCard component, or null if not found</returns>
        public AlbumCard ExtractAlbumCard(Transform newParent)
        {
            if (albumCard == null)
            {
                Debug.LogWarning("[FlippableCard] Cannot extract AlbumCard - none found!");
                return null;
            }
            
            // Reparent AlbumCard to new parent (maintain world position temporarily)
            // The caller will tween it to the final position
            albumCard.transform.SetParent(newParent, true);
            
            // Setup the card data on the AlbumCard
            if (_cardData != null)
            {
                albumCard.SetupCard(_cardData);
            }
            
            Debug.Log($"[FlippableCard] Extracted AlbumCard '{_cardData?.Name}' to {newParent.name} - ready for tween");
            
            return albumCard;
        }
        
        #endregion
        
        private void OnDestroy()
        {
            StopIdleHover();
        }
    }
}