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

namespace Cryville.Crtr.Browsing.UI {
	public class DetailPanel : MonoBehaviour {
		[SerializeField]
		Sprite m_coverPlaceholder;
		[SerializeField]
		GameObject m_placeholder;
		[SerializeField]
		GameObject m_content;
		[SerializeField]
		Image m_cover;
		[SerializeField]
		TMP_Text m_title;
		[SerializeField]
		TMP_Text m_desc;

		AsyncDelivery<Texture2D> _image;

		void OnDestroy() {
			DestroyDynamicResources();
		}

		public void Load(IResourceMeta meta) {
			m_placeholder.SetActive(false);
			m_content.SetActive(true);
			DestroyDynamicResources();
			m_cover.sprite = m_coverPlaceholder;

			_image = meta.EnumerateProperties<AsyncDelivery<Texture2D>>().FirstOrDefault().Value;
			if (_image != null) _image.Destination = DisplayCover;

			var nameProp = meta.Properties.FirstOrDefault(prop => prop.Name == "Name");
			if (nameProp != null) {
				var names = nameProp.EnumerateProperty(true).GetEnumerator();
				if (names.MoveNext()) {
					m_title.text = names.Current.Value.ToString();
					if (names.MoveNext()) {
						m_title.text += "\n" + names.Current.Value.ToString();
					}
				}
				else {
					m_title.text = "";
				}

				m_desc.text = "";
				var basicProps = meta.EnumerateBasicProperties().Where(prop => prop.Key != "Name").GetEnumerator();
				for (int i = 0; i < 4 && basicProps.MoveNext(); i++) {
					var cur = basicProps.Current;
					var str = string.Format("{0}: {1}", cur.Key, cur.Value);
					if (i == 0) m_desc.text = str;
					else m_desc.text += "\n" + str;
				}
			}
			else {
				m_title.text = "<color=#ff0000>Invalid resource</color>";
				m_desc.text = "";
			}
		}
		void DisplayCover(bool succeeded, Texture2D tex) {
			if (!succeeded) return;
			m_cover.sprite = Sprite.Create(tex, new Rect(0, 0, tex.width, tex.height), Vector2.zero, 160, 0, SpriteMeshType.FullRect);
		}
		public void Clear() {
			m_placeholder.SetActive(true);
			m_content.SetActive(false);
			DestroyDynamicResources();
		}

		void DestroyDynamicResources() {
			_image?.Cancel();
			if (m_cover.sprite != null && m_cover.sprite != m_coverPlaceholder) {
				Destroy(m_cover.sprite.texture);
				Destroy(m_cover.sprite);
			}
		}
	}
}