/********************************************************************
	文件: UIManager.cs
	作者: 梦语
	邮箱: 1982614048@qq.com
	创建时间: 2024/03/29 17:28:19
	最后修改: 梦语
	最后修改时间: 2024/04/03 15:10:11
	功能: 界面管理类
*********************************************************************/

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;
using UnityEngine.Accessibility;
using UnityEngine.UI;

namespace Ether
{
    public class UIManager : SingletonAutoMono<UIManager>
    {
        [HideInInspector]
        public GameObject MainCanvas; //主画布
        List<Transform> tierList = new List<Transform>(); //所有的层级
        //所有打开的界面
        private DictionaryEx<string, FrameBase> allOpenFrames = new DictionaryEx<string, FrameBase>();

        private LinkedSequence<string> frameOpenStack = new LinkedSequence<string>();

        public override void Init()
        {
            Clear();
            MainCanvas = EntityManager.Inst.GetEntity("MainCanvas").gameObject;
            CheckMainCanvasLayer();
        }

        #region 层级管理

        /// <summary>
        /// 检查MainCanvas下的层级
        /// </summary>
        private void CheckMainCanvasLayer()
        {
            tierList.Clear();
            //获取当前Canvas下所有的物体
            int childNum = MainCanvas.transform.childCount;
            Transform[] childTrans = new Transform[childNum];

            for (int i = 0; i < childNum; i++)
            {
                childTrans[i] = MainCanvas.transform.GetChild(i);
            }

            //动态创建UI层级
            string[] frameLayers = CommonTools.GetAllEnumName<FrameTier>();
            foreach (string layer in frameLayers)
            {
                if (string.IsNullOrEmpty(layer))
                {
                    continue;
                }
                Transform trans = MainCanvas.transform.Find(layer);
                if (trans == null)
                {
                    trans = new GameObject(layer, typeof(RectTransform)).transform;
                    trans.SetParent(MainCanvas.transform, false);
                    RectTransform rectTrans = trans.GetComponent<RectTransform>();
                    rectTrans.anchorMin = new Vector2(0, 0);
                    rectTrans.anchorMax = new Vector2(1, 1);
                    rectTrans.anchoredPosition = Vector2.zero;
                    rectTrans.sizeDelta = Vector2.zero;
                }
                tierList.Add(trans);
                trans.SetAsLastSibling();
            }

            //设置Canvas下之前的物体层级到最上层
            foreach (Transform trans in childTrans)
            {
                trans.SetAsLastSibling();
            }
        }

        /// <summary>
        /// 获取层级
        /// </summary>
        public Transform GetTier(int tierIndex)
        {
            if (tierList.Count <= tierIndex)
            {
                Debug.LogError($"没有该层级:{tierIndex},请检查配置");
                return null;
            }
            return tierList[tierIndex];
        }

        /// <summary>
        /// 获取层级
        /// </summary>
        public Transform GetTier(FrameTier tier)
        {
            int tierIndex = (int)tier;
            if (tierList.Count <= tierIndex)
            {
                Debug.LogError($"没有该层级:{tier},请检查配置");
                return null;
            }
            return tierList[tierIndex];
        }

        #endregion

        /// <summary>
        /// 循环
        /// </summary>
        private void Update()
        {
            float deltaTime = Time.deltaTime;
            foreach (var viewPair in allOpenFrames)
            {
                FrameBase frame = viewPair.Value;
                frame?.OnUpdate(deltaTime);
            }
        }

        /// <summary>
        /// 打开界面
        /// </summary>
        /// <param name="framName"></param>
        public void OpenFrame(string framName, OpenFrameData openFrameData = null, Action callback = null)
        {
            Type frameType = CommonTools.GetType(framName);
            OpenFrame(frameType, openFrameData, callback);
        }

        /// <summary>
        /// 打开界面
        /// </summary>
        /// <typeparam name="T"></typeparam>
        public void OpenFrame<T>(OpenFrameData openFrameData = null, Action callback = null) where T : FrameBase
        {
            OpenFrame(typeof(T), openFrameData, callback);
        }

        /// <summary>
        /// 打开界面
        /// </summary>
        /// <param name="name"></param>
        /// <param name="type"></param>
        private void OpenFrame(Type type, OpenFrameData openFrameData = null, Action callback = null)
        {
            string name = type.Name;
            
            FrameBase frame;
            if (allOpenFrames.ContainsKey(name))
            {
                frame = allOpenFrames[name];
                frame.CloseFrame();
            }
            else
            {
                frame = (FrameBase)Activator.CreateInstance(type);
                allOpenFrames.Add(name, frame);
            }
            
            frame.ShowFrame(openFrameData, callback);

            switch (frame.FrameData.FrameType)
            {
                case FrameType.Frame:
                    if (openFrameData != null && openFrameData.ParentFrameData != null)
                    {
                        break;
                    }
                    frameOpenStack.Add(name);
                    string str = "当前打开的界面 ：";
                    foreach (var node in frameOpenStack)
                    {
                        str += node.Value + "  ";
                    }
                    Debug.Log(str);

                    break;
                case FrameType.Pop:
                    break;
                default:
                    break;
            }

        }

        /// <summary>
        /// 关闭界面
        /// </summary>
        /// <typeparam name="T"></typeparam>
        public void CloseFrame<T>(Action callback = null) where T : FrameBase
        {
            string name = typeof(T).Name;
            CloseFrame(name, callback);
        }

        /// <summary>
        /// 关闭界面
        /// </summary>
        /// <param name="frameName"></param>
        public void CloseFrame(string frameName, Action callback = null)
        {
            if (allOpenFrames.ContainsKey(frameName))
            {
                FrameBase frame = allOpenFrames[frameName];
                frame.CloseFrame(callback);
                allOpenFrames.Remove(frameName);
            }

            frameOpenStack.Remove(frameName);
        }

        /// <summary>
        /// 获取界面资源
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="frame"></param>
        /// <returns></returns>
        public GameObject GetFrameRes<T>(T frame) where T : FrameBase
        {
            Type viewType = typeof(T);
            if (frame.FrameData != null && !string.IsNullOrEmpty(frame.FrameData.PrefabPath))
            {
                Transform parent;
                if (frame.OpenFrameData != null && frame.OpenFrameData.ParentFrameData != null 
                    && frame.OpenFrameData.ParentFrameData.parent != null)
                {
                    parent = frame.OpenFrameData.ParentFrameData.parent;
                }else{
                    parent = GetTier(frame.FrameData.Tier);
                }

                GameObject obj = LoaderTools.LoadGameObjectAndInstantiateAsync(frame.FrameData.PrefabPath, parent);

                if (obj == null)
                {
                    Debug.LogErrorFormat("加载Frame Prefab失败:{0}！", frame.FrameData.PrefabPath);
                    return null;
                }

                obj.AddComponent<Canvas>();
                obj.AddComponent<CanvasGroup>();
                obj.AddComponent<GraphicRaycaster>();

                return obj;
            }
            else
            {
                Debug.LogErrorFormat("当前Frame:{0}没有对应的Prefab路径，请添加入配置！", viewType);
                return null;
            }
        }


        /// <summary>
        /// 获取界面
        /// </summary>
        public T GetFrame<T>() where T : FrameBase
        {
            string name = typeof(T).Name;
            
            FrameBase frameBase = allOpenFrames[name];
            return frameBase as T;
        }

        /// <summary>
        /// 获取界面
        /// </summary>
        public FrameBase GetFrame(string frameName)
        {
            return allOpenFrames.GetValueOrDefault(frameName);
        }

        /// <summary>
        /// 是否开启
        /// </summary>
        public bool IsOpen<T>() where T : FrameBase
        {
            return GetFrame<T>() != null;
        }

        /// <summary>
        /// 返回
        /// </summary>
        public void BackFrame(string name, FrameType frameType)
        {
            switch (frameType)
            {
                case FrameType.Frame:
                    frameOpenStack.Remove(name);
                    if (frameOpenStack.Count > 0)
                    {
                        OpenFrame(frameOpenStack.Last().Value);
                    }
                    break;
                case FrameType.Pop:
                    frameOpenStack.Remove(name);
                    break;
                default:
                    break;
            }
        }

        /// <summary>
        /// 清理
        /// </summary>
        public override void Clear()
        {
            tierList.Clear();
            frameOpenStack.Clear();
            foreach (var frameNodePair in allOpenFrames)
            {
                frameNodePair.Value.Close();
            }
        }
    }
}