using System;
using UnityEngine;

namespace AppleHills.Data.CardSystem
{
    [Serializable]
    public class CardData
    {
        // Core data (serialized)
        public string Id; // Auto-generated unique ID (GUID)
        public string DefinitionId; // ID of the card definition this instance was created from
        public CardRarity Rarity; // Current rarity (may be upgraded from original)
        public int CopiesOwned; // Number of copies the player has (for stacking)
        
        // Reference back to the definition (not serialized)
        [NonSerialized]
        private CardDefinition _definition;
        
        // Properties that reference definition data
        public string Name => _definition?.Name;
        public string Description => _definition?.Description;
        public CardZone Zone => _definition?.Zone ?? CardZone.AppleHills;
        public int CollectionIndex => _definition?.CollectionIndex ?? 0;
        public Sprite CardImage => _definition?.CardImage;

        // Default constructor
        public CardData()
        {
            Id = Guid.NewGuid().ToString();
            CopiesOwned = 0;
        }
        
        // Constructor from definition
        public CardData(CardDefinition definition)
        {
            Id = Guid.NewGuid().ToString();
            DefinitionId = definition.Id;
            Rarity = definition.Rarity;
            CopiesOwned = 1;
            _definition = definition;
        }

        // Copy constructor
        public CardData(CardData other)
        {
            Id = other.Id;
            DefinitionId = other.DefinitionId;
            Rarity = other.Rarity;
            CopiesOwned = other.CopiesOwned;
            _definition = other._definition;
        }
        
        // Method to link this card data to its definition
        public void SetDefinition(CardDefinition definition)
        {
            if (definition != null)
            {
                _definition = definition;
                DefinitionId = definition.Id;
            }
        }
        
        // Method to upgrade rarity when enough copies are collected
        public bool TryUpgradeRarity()
        {
            // Simple implementation - each rarity needs twice as many copies to upgrade
            int requiredCopies = (int)Rarity * 2 + 1;
            
            if (CopiesOwned >= requiredCopies && Rarity < CardRarity.Legendary)
            {
                Rarity += 1;
                CopiesOwned -= requiredCopies;
                return true;
            }
            
            return false;
        }
        
        // ToString method for debugging
        public override string ToString()
        {
            return $"CardData [ID: {Id}, Name: {Name}, Rarity: {Rarity}, Zone: {Zone}, " +
                   $"DefinitionID: {DefinitionId}, Copies: {CopiesOwned}, " +
                   $"Has Definition: {_definition != null}, Has Image: {CardImage != null}]";
        }
    }

    // Enums for card attributes
    public enum CardRarity
    {
        Normal = 0,
        Rare = 1,
        Legendary = 2
    }
    
    public enum CardZone
    {
        AppleHills,
        Quarry,
        Forest,
        Mountain,
        Beach
    }
}