using Core;
using Core.SaveLoad;
using UnityEngine;

namespace UI.CardSystem.StateMachine.States
{
    /// <summary>
    /// Handles flipping a pending face-down card after data assignment.
    /// Transitions to DraggingRevealedState when flip completes.
    /// </summary>
    public class CardFlippingPendingState : AppleState
    {
        private CardContext context;
        private GameObject cardBack;
        
        private void Awake()
        {
            context = GetComponentInParent<CardContext>();
            if (context != null)
            {
                var backTransform = context.RootTransform.Find("CardBack");
                if (backTransform != null) cardBack = backTransform.gameObject;
            }
        }
        
        public override void OnEnterState()
        {
            if (context == null) return;
            // Ensure card back visible and front hidden at start
            if (cardBack != null) cardBack.SetActive(true);
            if (context.CardDisplay != null) context.CardDisplay.gameObject.SetActive(false);
            
            // Optional: album navigation
            var albumPage = Object.FindObjectOfType<AlbumViewPage>();
            if (albumPage != null && context.CardData != null)
            {
                int targetPage = albumPage.FindPageForCard(context.CardData); // placeholder; method may be private
            }
            
            if (context.Animator != null)
            {
                Transform back = cardBack != null ? cardBack.transform : null;
                Transform front = context.CardDisplay != null ? context.CardDisplay.transform : null;
                context.Animator.PlayFlip(back, front, onComplete: () =>
                {
                    context.StateMachine.ChangeState("DraggingRevealedState");
                });
            }
            else
            {
                if (cardBack != null) cardBack.SetActive(false);
                if (context.CardDisplay != null) context.CardDisplay.gameObject.SetActive(true);
                context.StateMachine.ChangeState("DraggingRevealedState");
            }
        }
    }
}