using System.Collections;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using UnityEngine;
using BITKit;
using BITKit.SubSystems.Quest;
using UnityEngine.UIElements;
using System.Threading.Tasks;
namespace BITKit.UX
{
    public class UXQuest : MonoBehaviour
    {
        [Header(Constant.Header.Settings)]
        public bool clearAfterCompleted;
        
        [Header(Constant.Header.Components)]
        [SerializeField] private UIDocument document;
        
        [Header(Constant.Header.Reference)]
        [SerializeReference, SubclassSelector] public References completeClassName;
        [Header(Constant.Header.Prefabs)]
        
        public VisualTreeAsset visualTreeAsset;
        
        [Header(Constant.Header.InternalVariables)]
        private readonly Dictionary<string, UXContainer> dictionary = new();

        [UXBindPath("quest-container")]
        private VisualElement _container;
        private void Start()
        {
            UXUtils.Inject(this);
            
            QuestSystem.OnQuestCreated += OnQuestCreated;
            QuestSystem.OnQuestCompleted += OnQuestCompleted;
            QuestSystem.OnQuestCanceled += OnQuestCancened;

            _container.Clear();
        }
        private void OnDestroy()
        {
            QuestSystem.OnQuestCreated -= OnQuestCreated;
            QuestSystem.OnQuestCompleted -= OnQuestCompleted;
            QuestSystem.OnQuestCanceled -= OnQuestCancened;
        }
        private void OnQuestCreated(QuestSystem.Info quest)
        {
            BIT4Log.Log<UXQuest>($"已创建任务:{quest.name}");


            if (dictionary.TryGetValue(quest.name, out var container))
            {
                container.visualElement.RemoveFromClassList(completeClassName);
            }
            else
            {
                container = new(visualTreeAsset.CloneTree());
                dictionary.Add(quest.name, container);
            }


            container.titleLabel.text = quest.name;
            container.descriptionLabel.text = quest.description;

            _container.Add(container);
        }
        void OnQuestCancened(QuestSystem.Info quest)
        {
            BIT4Log.Log<UXQuest>($"已取消任务:{quest.name}");
            if (dictionary.TryGetValue(quest.name, out var container))
            {
                _container.Remove(container);
                dictionary.Remove(quest.name);
            }
        }
        async void OnQuestCompleted(QuestSystem.Info quest)
        {
            BIT4Log.Log<UXQuest>($"已完成任务:{quest.name}");

            if (dictionary.TryGetValue(quest.name, out var container))
            {
                container.visualElement.AddToClassList(completeClassName);
                container.titleLabel.text = $"已完成:{quest.name}";
                container.visualElement.tabIndex = 256;
                if (clearAfterCompleted)
                {
                    dictionary.Remove(quest.name);
                    try
                    {
                        await Task.Delay(8096, destroyCancellationToken);
                    }
                    catch (System.OperationCanceledException) { }
                    catch (System.Exception)
                    {
                        _container.Remove(container);
                        throw;
                    }
                }
            }
        }
    }
}