using System;
using System.Collections.Generic;
using IronMountain.StandardAnimations.RectTransforms;
using SpellBoundAR.Selections;
using UnityEngine;

namespace SpellBoundAR.CustomTextures.UI
{
    public class CustomTextureIndex : MonoBehaviour
    {
        public event Action OnOpen;
        public event Action OnClose;
        
        public readonly SelectionManager<ISavedCustomTexture> SelectionManager = new ();
    
        [Header("References")]
        [SerializeField] private Drawer drawer;
        [SerializeField] private TexturePreview prefab;
        [SerializeField] private Transform parent;

        [Header("Cache")]
        private ISavedCustomTexturesManager _savedCustomTexturesManager;

        private void Awake()
        {
            _savedCustomTexturesManager = GetComponentInParent<ISavedCustomTexturesManager>();
            if (drawer) drawer.CloseImmediate();
            RefreshIndex();
        }

        public CustomTextureIndex Initialize(ISavedCustomTexturesManager savedCustomTexturesManager)
        {
            _savedCustomTexturesManager = savedCustomTexturesManager;
            if (drawer) drawer.CloseImmediate();
            RefreshIndex();
            return this;
        }

        public void Open()
        {
            if (drawer) drawer.Open();
            OnOpen?.Invoke();
        }

        public void Close()
        {
            if (drawer)
            {
                drawer.Close();
                Destroy(gameObject, drawer.Seconds);
            }
            else Destroy(gameObject);
            OnClose?.Invoke();
        }

        private void ClearButtons()
        {
            if (!prefab) return;
            foreach (Transform child in parent)
            {
                Destroy(child.gameObject);
            }
        }

        private void RefreshIndex()
        {
            ClearButtons();
            if (!prefab || _savedCustomTexturesManager == null) return;
            foreach (KeyValuePair<string, ISavedCustomTexture> entry in _savedCustomTexturesManager.CustomTextures)
            {
                if (entry.Value is not {Saved: true}) continue;
                TexturePreview texturePreview = Instantiate(prefab, parent);
                texturePreview.SavedCustomTexture = entry.Value;
                texturePreview.Index = this;
            }
        }
    }
}