/********************************************************************
	文件: ScrollViewGridEx.cs
	作者: 梦语
	邮箱: 1982614048@qq.com
	创建时间: 2024/4/5 17:11
	最后修改: 梦语
	最后修改时间: 2024/04/23 09:21:55
	功能: 
*********************************************************************/
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using Sirenix.OdinInspector;

#if UNITY_EDITOR
using UnityEditor;
#endif

namespace Ether
{
    public class ScrollViewGridEx : SerializedMonoBehaviour
    {
        public enum ScrollDirection
        {
            [InspectorName("从上到下")]
            TopToDown,
            [InspectorName("从下到上")]
            DownToTop,
            [InspectorName("从左到右")]
            LeftToRight,
            [InspectorName("从右到左")]
            RightToLeft,
        }

        /// <summary>
        /// 格子数据
        /// </summary>
        public class CellInfo
        {
            public int index;
            public Vector3 pos; //已左上角为点
            public GameObject item;
        }

        #region  参数
        private ScrollRect scrollRect;
        public ScrollRect ScrollRect => scrollRect;

        [ShowInInspector]
        private RectTransform content;

        [Tooltip("该属性优先"), LabelText("格子预制体")]
        [ShowIf("@this.cellPrefabPath == null || this.cellPrefabPath == \"\"")]
        public GameObject cellPrefab;

        [Tooltip("格子预制体属性优先"), LabelText("格子预制体路径")]
        [ShowIf("@this.cellPrefab == null")]
        public string cellPrefabPath;

        private ScrollDirection scrollDirection;

        [SerializeField, ExposeProperty, Label("方向")]
        public ScrollDirection Direction
        {
            get => scrollDirection;
            set
            {
                scrollDirection = value;
                ScrollRect scroll = GetComponent<ScrollRect>();
                //Debug.LogError(scrollDirection);
                switch (value)
                {
                    case ScrollDirection.TopToDown:
                    case ScrollDirection.DownToTop:
                        scroll.horizontal = false;
                        scroll.vertical = true;
                        break;
                    case ScrollDirection.LeftToRight:
                    case ScrollDirection.RightToLeft:
                        scroll.horizontal = true;
                        scroll.vertical = false;
                        break;
                    default:
                        break;
                }
            }
        }

        [SerializeField, Label("一行或一列数量")]
        private int rowOrColNum = 1;

        [SerializeField, Label("间隔")]
        private Vector2 specing;

        #endregion

        private void Awake()
        {
            scrollRect = GetComponent<ScrollRect>();

            if (scrollRect == null)
            {
                Debug.LogError("该组件需要对应的ScrollRect! 请检查!!!");
                return;
            }

            if (content == null)
            {
                content = scrollRect?.content;
            }

            if (content == null)
            {
                Transform viewport = scrollRect?.viewport;
                content = viewport != null ? viewport?.GetChild(0).GetComponent<RectTransform>() : null;
            }

            if (content == null)
            {
                Debug.LogError("获取不到对应的ScrollView中的content! 请检查!!!");
                return;
            }

            content.anchorMin = new Vector2(0, 1);
            content.anchorMax = new Vector2(0, 1);

            if (cellPrefab == null)
            {
                cellPrefab = LoaderTools.LoadAsset<GameObject>(cellPrefabPath);
            }

            if (cellPrefab == null)
            {
                Debug.LogError("获取不到对应的格子预制体! 请检查!!!");
                return;
            }
            cellPrefab.SetActive(false);

            scrollRect.onValueChanged.RemoveAllListeners();
            scrollRect.onValueChanged.AddListener(ScrollOnDragListener);
        }

        Action<GameObject, int> actionEvent;
        List<CellInfo> cellInfoList = new List<CellInfo>();

        public void Init(Action<GameObject, int> dataAction, int dataMaxNum = -1)
        {
            cellInfoList.Clear();
            actionEvent = dataAction;
            if (dataMaxNum != -1)
            {
                RefreshData(dataMaxNum);
            }
        }

        public void RefreshData(int dataMaxNum)
        {
            if (cellPrefab == null)
            {
                Debug.LogError("获取不到对应的格子预制体! 请检查!!!");
                return;
            }

            foreach (CellInfo info in cellInfoList)
            {
                if (info.item != null)
                {
                    info.item.PushPool();
                }
                info.PushPool();
            }

            for (int i = 0; i < dataMaxNum; i++)
            {
                CellInfo cellInfo = PoolManager.Inst.Get<CellInfo>();
                cellInfo.index = i;
                cellInfoList.Add(cellInfo);
            }

            Vector2 cellSize = cellPrefab.GetSize();

            switch (scrollDirection)
            {
                case ScrollDirection.TopToDown:
                case ScrollDirection.DownToTop:
                    int rowNum = dataMaxNum / rowOrColNum + 1;
                    float width = (cellSize.x + specing.x) * rowOrColNum - specing.x;
                    float height = (cellSize.y + specing.y) * rowNum - specing.y;
                    content.gameObject.SetSize(new Vector2(width, height));
                    for (int i = 0; i < cellInfoList.Count; i++)
                    {
                        CellInfo cellInfo = cellInfoList[i];
                        int curCol = i % rowOrColNum;
                        int curRow = i / rowOrColNum;
                        float posX = curCol * (cellSize.x + specing.x);
                        float posY = -curRow * (cellSize.y + specing.y);
                        cellInfo.pos = new Vector3(posX, posY);
                        //Debug.Log(cellInfo.pos);
                    }
                    break;
                case ScrollDirection.LeftToRight:
                case ScrollDirection.RightToLeft:
                    int colNum = dataMaxNum / rowOrColNum + 1;
                    float contentWidth = (cellSize.x + specing.x) * colNum - specing.x;
                    float contentHeight = (cellSize.y + specing.y) * rowOrColNum - specing.y;
                    content.gameObject.SetSize(new Vector2(contentWidth, contentHeight));
                    for (int i = 0; i < cellInfoList.Count; i++)
                    {
                        CellInfo cellInfo = cellInfoList[i];
                        int curRow = i % rowOrColNum;
                        int curCol = i / rowOrColNum;
                        float posX = curCol * (cellSize.x + specing.x);
                        float posY = -curRow * (cellSize.y + specing.y);
                        cellInfo.pos = new Vector3(posX, posY);
                        //Debug.Log(cellInfo.pos);
                    }
                    break;
                default:
                    break;
            }

            CheckCellItemData();
        }

        Vector2 lastPos = Vector2.zero;
        Vector2 curPos = Vector2.zero;

        private void ScrollOnDragListener(Vector2 pos)
        {
            curPos = pos;
            if (curPos != lastPos)
            {
                //Debug.Log(pos);
                CheckCellItemData();
            }
            lastPos = curPos;
        }

        private void CheckCellItemData()
        {
            for (int i = 0; i < cellInfoList.Count; i++)
            {
                CellInfo cellInfo = cellInfoList[i];
                //Debug.Log(cellInfo.pos);
                if (IsInScrollRange(cellInfo))
                {
                    if (cellInfo.item == null)
                    {
                        cellInfo.item = PoolManager.Inst.Get(cellPrefab, content);
                        cellInfo.item.transform.localPosition = cellInfo.pos;
                        cellInfo.item.name = cellInfo.index.ToString();
                    }
                    actionEvent?.Invoke(cellInfo.item, cellInfo.index);
                }
                else
                {
                    if (cellInfo.item != null)
                    {
                        cellInfo.item.PushPool(cellPrefab.name);
                        cellInfo.item = null;
                    }
                }
            }
        }

        private bool IsInScrollRange(CellInfo cellInfo)
        {
            Vector2 contentPos = content.anchoredPosition;
            Vector2 scrollSize = scrollRect.gameObject.GetSize();
            Vector2 cellSize = cellPrefab.GetSize();

            float topPos = -contentPos.y + cellSize.y;
            float downPos = -contentPos.y - scrollSize.y;
            float leftPos = -contentPos.x - cellSize.x;
            float rightPos = -contentPos.x + scrollSize.x;

            //Debug.Log($"cellInfo.pos:{cellInfo.pos}   topPos:{topPos}/downPos:{downPos}/leftPos:{leftPos}/rightPos:{rightPos}");
            if (cellInfo.pos.x >= leftPos && cellInfo.pos.x <= rightPos && cellInfo.pos.y >= downPos && cellInfo.pos.y <= topPos)
            {
                return true;
            }

            return false;
        }

#if UNITY_EDITOR
        [MenuItem("GameObject/UIEx/ScrollViewEx/ScrollViewGridEx", priority = -990)]
        private static void CreateScrollViewEx(MenuCommand menuCmd)
        {
            GameObject selection = Selection.activeGameObject;
            
            CommonExtension.CreateComponent<ScrollRect>(selection, (obj) =>
            {
                obj.SetWidth(800);
                obj.SetHeight(600);

                GameObject viewport = ObjectFactory.CreateGameObject("Viewport", typeof(Image), typeof(Mask));
                viewport.transform.SetParent(obj.transform, false);
                RectTransform viewportRect = viewport.GetComponent<RectTransform>();
                viewportRect.anchorMin = new Vector2(0, 0);
                viewportRect.anchorMax = new Vector2(1, 1);
                viewportRect.pivot = new Vector2(0, 1);
                viewport.SetWidth(0);
                viewport.SetHeight(0);
                Mask viewportMask = viewport.GetComponent<Mask>();
                viewportMask.showMaskGraphic = false;

                GameObject content = ObjectFactory.CreateGameObject("Content", typeof(RectTransform));
                content.transform.SetParent(viewport.transform, false);
                RectTransform contentRect = content.GetComponent<RectTransform>();
                contentRect.anchorMin = new Vector2(0, 1);
                contentRect.anchorMax = new Vector2(0, 1);
                contentRect.pivot = new Vector2(0, 1);
                content.SetWidth(800);
                content.SetHeight(600);

                ScrollRect scrollRect = obj.GetComponent<ScrollRect>();
                scrollRect.content = contentRect;
                scrollRect.viewport = viewportRect;
                scrollRect.horizontal = false;
                scrollRect.vertical = true;

                ScrollViewGridEx scrollViewEx = obj.GetComponent<ScrollViewGridEx>();
                scrollViewEx.content = contentRect;

            }, typeof(Canvas));


        }

#endif
    }
}