using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using DG.Tweening;
using UnityEngine;
using UnityEngine.UI;
#if HotUpdate
using YooAsset;
#endif

namespace Stary.Evo.UIFarme
{
    public interface IBasePanel : IController
    {
        /// <summary>
        /// UI信息
        /// </summary>
        string UIName { get; set; }

        /// <summary>
        /// 绑定这个面板的实例
        /// </summary>
        void Initialize(GameObject panelGo);

        /// <summary>
        /// 初始化面板管理器
        /// </summary>
        /// <param name="panelManager"></param>
        void Initialize(IPanelSystem sysytem);

        /// <summary>
        /// 虚方法，UI进入时执行的操作，只会执行一次
        /// </summary>
        void OnEnter(Action complete = null);

        /// <summary>
        /// 虚方法，UI暂停时执行的操作，只会执行一次
        /// </summary>
        void OnPause();

        /// <summary>
        /// 虚方法，UI继续时执行的操作，只会执行一次
        /// </summary>
        void OnResume();

        /// <summary>
        /// 虚方法，UI退出时执行的操作，只会执行一次
        /// </summary>
        void OnExit(float delay = 0f);

        void OnDestroy();


        /// <summary>
        /// 生成/获取一个UI对象
        /// </summary>
        /// <param name="type">ui信息</param>
        /// <returns></returns>
        Task<GameObject> CreatePanel(string panelName, string packageName);

        /// <summary>
        /// 销毁一个Ui对象
        /// </summary>
        /// <param name="type"></param>
        void DestoryUI();

        void SetPanelParent(Transform parent);
    }

    /// <summary>
    ///所有UI面板的父类，包含UI面板的状态信息
    /// </summary>
    public abstract class BasePanel : IBasePanel
    {
        /// <summary>
        /// UI信息
        /// </summary>
        public string UIName { get; set; }

        public abstract UITweenType TweenType { get; }

        /// <summary>
        /// 面板管理器
        /// </summary>
        protected IPanelSystem PanelSystem { get; private set; }

        /// <summary>
        /// 生成的父物体
        /// </summary>
        protected Transform panelParent { get; private set; }


        /// <summary>
        /// 缓存该面板所有的Button，Toggle，Slider，InputField，Dropdown，ScroolBar
        /// </summary>
        private Dictionary<string, Selectable> selectableDict;

        protected CanvasGroup canvasGroup { get; private set; }

        protected GameObject activePanel { get; private set; }

        protected BasePanel()
        {
            selectableDict = new Dictionary<string, Selectable>();
        }

        public virtual void Initialize(GameObject panelGo)
        {
            activePanel = panelGo;
            Selectable[] selectables = activePanel.GetComponentsInChildren<Selectable>(true);
            foreach (Selectable item in selectables)
            {
                selectableDict[item.name] = item;
            }

            canvasGroup = UITool.GetOrAddComponent<CanvasGroup>(activePanel);
            canvasGroup.alpha = 0f;
        }

        public virtual void Initialize(IPanelSystem sysytem)
        {
            PanelSystem = sysytem;
        }


        public virtual void OnEnter(Action complete = null)
        {
            activePanel.SetActive(true);
            canvasGroup.blocksRaycasts = true;
            if (TweenType == UITweenType.Fade)
            {
                canvasGroup.alpha = 1f;
            }

            if (TweenType == UITweenType.Fade)
            {
                canvasGroup.DOFade(1f, 2f).OnComplete(() => { complete?.Invoke(); });
            }
            else if (TweenType == UITweenType.Yoyo)
            {
                canvasGroup.DOFade(1, 2f).SetLoops(2, LoopType.Yoyo).OnComplete(() => { complete?.Invoke(); });
            }
            else
            {
                canvasGroup.DOFade(1, 2f).SetLoops(-1).OnComplete(() => { complete?.Invoke(); });
            }
        }

        public virtual void OnPause()
        {
            canvasGroup.blocksRaycasts = false;
        }

        public virtual void OnResume()
        {
            canvasGroup.blocksRaycasts = true;
        }

        public virtual void OnExit(float delay = 0f)
        {
            canvasGroup.DOFade(0f, delay).OnComplete(() =>
            {
                activePanel.SetActive(false);
                canvasGroup.blocksRaycasts = false;
            });
        }

        public virtual void OnDestroy()
        {
            DestoryUI();
        }


        public async Task<GameObject> CreatePanel(string panelName, string packageName)
        {
            if (panelParent == null)
            {
                Debug.LogWarning($"UnityEvo:parent为空,{panelName}自动设置为root节点下，请检查是否正确！！！！！");
            }

            if (this.activePanel != null)
            {
                return activePanel.gameObject;
            }
#if HotUpdate
            AssetHandle handle = null;
            if (packageName == null)
            {
                handle = YooAssets.LoadAssetAsync<GameObject>(panelName);
            }
            else
            {
                var package = YooAssets.TryGetPackage(packageName);
                if (package == null)
                {
                    handle = YooAssets.LoadAssetAsync<GameObject>(panelName);
                }
                else
                {
                    handle = package.LoadAssetAsync<GameObject>(panelName);
                }
            }

            await handle.Task;

            activePanel = GameObject.Instantiate(handle.AssetObject as GameObject, panelParent);
#else
            GameObject handle = Resources.Load<GameObject>(panelName);
            activePanel = GameObject.Instantiate(handle, panelParent);
#endif


            activePanel.name = this.GetType().Name;


            if (!activePanel.GetComponentInChildren<Canvas>() && !activePanel.GetComponentInParent<Canvas>())
            {
                Debug.LogError($"UnityEvo:panelParent上不存在Canvas组件,{panelName}无法正常运行，进程已中断，请检查！！！！！");
                return null;
            }

            return activePanel;
        }

        public void DestoryUI()
        {
            if (activePanel != null)
            {
                GameObject.Destroy(activePanel);
                PanelSystem.Get_Dic().Remove(this.GetType().Name);
            }
        }

        public void SetPanelParent(Transform parent)
        {
            panelParent = parent;
        }

        /// <summary>
        /// 获取组件：Button，Toggle，Slider，InputField，Dropdown，ScroolBar
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="name"></param>
        /// <returns></returns>
        protected T GetComp<T>(string name) where T : Selectable
        {
            selectableDict.TryGetValue(name, out Selectable t);
            if (t == null)
            {
                Debug.LogError($"{this.GetType()}---{name}：在selectableDict不存在");
            }

            return t as T;
        }

        public IArchitecture GetArchitecture()
        {
            return PanelSystem.GetArchitecture();
        }

        public enum UITweenType
        {
            /// <summary>
            /// 无动画
            /// </summary>
            None,

            /// <summary>
            /// 淡入淡出
            /// </summary>
            Fade,

            /// <summary>
            /// 循环播放
            /// </summary>
            Loop,

            /// <summary>
            /// 往返播放
            /// </summary>
            Yoyo,
        }
    }
}