using AppleHills.Data.CardSystem;
using Core;
using Data.CardSystem;
using UI.DragAndDrop.Core;
using UnityEngine;

namespace UI.CardSystem
{
    /// <summary>
    /// Specialized slot for album pages that only accepts a specific card.
    /// Validates cards based on their CardDefinition.
    /// Self-populates with owned cards when enabled.
    /// </summary>
    public class AlbumCardSlot : DraggableSlot
    {
        [Header("Album Slot Configuration")]
        [SerializeField] private CardDefinition targetCardDefinition; // Which card this slot accepts
        [SerializeField] private GameObject cardPrefab; // Card prefab to spawn when card is owned
        
        private StateMachine.Card _placedCard;
        
        private void OnEnable()
        {
            // Check if we should spawn a card for this slot
            CheckAndSpawnOwnedCard();
        }

        
        /// <summary>
        /// Check if player owns the card for this slot and spawn it if so
        /// </summary>
        private void CheckAndSpawnOwnedCard()
        {
            // Guard: need CardSystemManager and target definition
            if (CardSystemManager.Instance == null || targetCardDefinition == null)
                return;
            
            // Guard: don't spawn if already occupied
            if (_placedCard != null)
                return;
            
            // Guard: need prefab to spawn
            if (cardPrefab == null)
            {
                Logging.Warning($"[AlbumCardSlot] No cardPrefab assigned for slot targeting {targetCardDefinition.name}");
                return;
            }
            
            // Check if player owns this card at ANY rarity (prioritize highest rarity)
            CardData ownedCard = null;
            
            // Check in order: Legendary > Rare > Normal
            foreach (CardRarity rarity in new[] { CardRarity.Legendary, CardRarity.Rare, CardRarity.Normal })
            {
                CardData card = CardSystemManager.Instance.GetCardInventory().GetCard(targetCardDefinition.Id, rarity);
                if (card != null)
                {
                    ownedCard = card;
                    break; // Found highest rarity owned
                }
            }
            
            // Spawn card if owned
            if (ownedCard != null)
            {
                SpawnCard(ownedCard);
            }
        }
        
        /// <summary>
        /// Spawn a Card in this slot using the PlacedInSlotState
        /// </summary>
        private void SpawnCard(CardData cardData)
        {
            GameObject cardObj = Instantiate(cardPrefab, transform);
            var card = cardObj.GetComponent<StateMachine.Card>();
            
            if (card != null)
            {
                // Setup card for album slot (starts in PlacedInSlotState)
                card.SetupForAlbumSlot(cardData, this);
                _placedCard = card;
                
                // Resize the card to match the slot size
                RectTransform cardRect = card.transform as RectTransform;
                RectTransform slotRect = transform as RectTransform;
                if (cardRect != null && slotRect != null)
                {
                    // Set height to match slot height (AspectRatioFitter will handle width)
                    float targetHeight = slotRect.rect.height;
                    cardRect.sizeDelta = new Vector2(cardRect.sizeDelta.x, targetHeight);
                    
                    // Ensure position and rotation are centered
                    cardRect.localPosition = Vector3.zero;
                    cardRect.localRotation = Quaternion.identity;
                }
                
                // Register with AlbumViewPage for enlarge/shrink handling
                AlbumViewPage albumPage = FindFirstObjectByType<AlbumViewPage>();
                if (albumPage != null)
                {
                    albumPage.RegisterCardInAlbum(card);
                }
                
                Logging.Debug($"[AlbumCardSlot] Spawned owned card '{cardData.Name}' ({cardData.Rarity}) in slot");
            }
            else
            {
                Logging.Warning($"[AlbumCardSlot] Spawned prefab has no Card component!");
                Destroy(cardObj);
            }
        }
        

        /// <summary>
        /// Get the target card definition for this slot
        /// </summary>
        public CardDefinition TargetCardDefinition => targetCardDefinition;
        
        /// <summary>
        /// Get the target card definition for this slot (method version for compatibility)
        /// </summary>
        public CardDefinition GetTargetCardDefinition() => targetCardDefinition;
    }
}