using Cryville.Common;
using Cryville.Common.Unity;
using System.Linq;
using TMPro;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

namespace Cryville.Crtr.Browsing.UI {
	internal class BrowserItemTile : BrowserItem, IPointerClickHandler, IPointerEnterHandler, IPointerExitHandler {
#pragma warning disable IDE0044
		[SerializeField]
		Sprite m_iconPlaceholder;
#pragma warning restore IDE0044

		[SerializeField]
		Image m_icon;
		[SerializeField]
		TMP_Text m_title;
		[SerializeField]
		TMP_Text m_desc;

		StateTweener _tweener;
		AsyncDelivery<Texture2D> _cover;

		void Awake() {
			_tweener = GetComponent<StateTweener>();
		}

		void OnDestroy() {
			OnReset();
		}
		protected override void OnReset() {
			_cover?.Cancel();
			if (m_icon.sprite != null && m_icon.sprite != m_iconPlaceholder) {
				Destroy(m_icon.sprite.texture);
				Destroy(m_icon.sprite);
			}
			_tweener.ClearState();
		}

		protected override void OnLoad(bool selected) {
			m_icon.sprite = m_iconPlaceholder;
			m_desc.text = string.Empty;

			bool validFlag = false;
			if (Meta != null) {
				var basicProps = Meta.EnumerateBasicProperties(true).GetEnumerator();
				if (basicProps.MoveNext()) {
					m_title.text = basicProps.Current.Value.ToString();
					if (basicProps.MoveNext()) {
						m_desc.text = basicProps.Current.Value.ToString();
					}
					validFlag = true;
				}

				_cover = Meta.EnumerateProperties<AsyncDelivery<Texture2D>>().FirstOrDefault().Value;
			}
			if (!validFlag) {
				m_title.text = "<color=#ff0000>Invalid resource</color>";
			}

			if (_cover != null) _cover.Destination = DisplayCover;
			if (IsDir) _tweener.EnterState("Directory");
			if (selected) _tweener.EnterState("Selected");
		}
		void DisplayCover(bool succeeded, Texture2D tex) {
			if (succeeded) {
				m_icon.sprite = Sprite.Create(tex, new Rect(0, 0, tex.width, tex.height), Vector2.zero, 160, 0, SpriteMeshType.FullRect);
			}
		}
		public void OnClick() {
			if (Id == null) return;
			Browser.OnItemClicked(Id.Value);
		}
		public void OnPointerClick(PointerEventData eventData) {
			OnClick();
		}
		public void OnPointerEnter(PointerEventData eventData) {
			_tweener.EnterState("Hovered", 0.1f);
		}
		public void OnPointerExit(PointerEventData eventData) {
			_tweener.ExitState("Hovered", 0.1f);
		}
		internal override void OnSelect() {
			base.OnSelect();
			_tweener.EnterState("Selected", 0.1f);
		}
		internal override void OnDeselect() {
			base.OnDeselect();
			_tweener.ExitState("Selected", 0.1f);
		}
	}
}