using Sirenix.OdinInspector;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;
using UniRx;

namespace Project.Store
{ 
    public abstract class StoreAdapter : SerializedMonoBehaviour
    {
        [FoldoutGroup("Settings")]                          public      bool                        refreshOnStart = true;
        [FoldoutGroup("Settings"), Required, AssetsOnly]    public      StoreSellableDrawer         drawerPrefab;
        [SerializeField, HideInInspector]                   protected   List<StoreSellableDrawer>   instances = new List<StoreSellableDrawer>();
        
        protected virtual void Awake()
        {
            StoreSO.Instance.OnInitialized
                .Subscribe  (iapInitializer => Refresh())
                .AddTo      (this);
        }
        protected virtual void Start()
        {
            if (refreshOnStart) Refresh();
        }

        [Button(ButtonSizes.Medium), HorizontalGroup(" ")]
        public virtual void Refresh()
        {
            if (instances.Any(x => x == null))
                instances = GetComponentsInChildren<StoreSellableDrawer>().ToList();

            var sellables = GetSellables();
            for(int i = 0; i < sellables.Count; i++)
            {
                if (instances.Count <= i) instances.Add(InstantiateDrawer(drawerPrefab));
                instances[i].ID = sellables[i].ID;
                instances[i].UpdateDrawer();
            }

            var removeRange = instances.Count - sellables.Count;
            for (int i = sellables.Count; i < instances.Count; i++)
                DestroyDrawerInstance(instances[i]);

            if (removeRange > 0) instances.RemoveRange(sellables.Count, removeRange);
        }

        [Button(ButtonSizes.Medium), HorizontalGroup(" "), GUIColor(1f, .5f, .5f)]
        public virtual void ClearInstances()
        {
            for (int i = 0; i < instances.Count; i++)
                DestroyDrawerInstance(instances[i]);

            instances.Clear();
        }

        protected virtual StoreSellableDrawer InstantiateDrawer(StoreSellableDrawer drawerPrefab)
        {
    #if UNITY_EDITOR
            if (!Application.isPlaying)
            {
                var gameObjectInstance = UnityEditor.PrefabUtility.InstantiatePrefab(drawerPrefab.gameObject, transform) as GameObject;
                return gameObjectInstance.GetComponent<StoreSellableDrawer>();
            }
    #endif
            return Instantiate(drawerPrefab, transform);
        }
        protected virtual void DestroyDrawerInstance(StoreSellableDrawer instance)
        {
            if (Application.isPlaying)  Destroy(instance.gameObject);
            else                        DestroyImmediate(instance.gameObject);
        }

        protected abstract List<StoreSellable> GetSellables();
    }
}