using System;
using UnityEditor;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;
using TGS;
using UnityEngine;

namespace AutoConfig
{
    public static class ExcelRead
    {
        private static List<string> _stringCfgMixKeyList;           //stringCfg里面所有的MixKey
        public static List<string> StringCfgMixValueList = new();
        
        public static List<string> StringCfgMixKeyList => _stringCfgMixKeyList;

        private static Dictionary<string, IWorkbook> _cacheWorkbooks = new();
        private static List<FileStream> _listFileStreams = new();

        public enum RowInfo
        {
            Variable,
            Type,
            Config
        }

#region 生成StringConfig对应的Key/Value

        /// <summary>
        /// 加载StringConfig表中的MixKey，放入列表
        /// </summary>
        public static void LoadStrCfgMixKeyList()
        {
            if (_stringCfgMixKeyList == null)
            {
                _stringCfgMixKeyList = new List<string>();
            }
            else
            {
                _stringCfgMixKeyList.Clear();
            }

            //ExcelWrite.CfgMixKeyDataList.Clear();
            var stringCfgPath = GenMixKeyTool.CfgPath + GenMixKeyTool.StringConfigPath;
            var workBook = GetWorkBook(stringCfgPath);
            if (workBook == null)
            {
                DebugUtil.LogError($"找不到配置表文件，路径: {stringCfgPath}");
                return;
            }
            
            var sheetNum = workBook.NumberOfSheets;
            for (int i = 0; i < sheetNum; i++)
            {
                int sheetIdx = i;
                int rowIdx = -1;
                int lineIdx = -1;
                var sheet = workBook.GetSheetAt(i);
                var row = sheet.GetRow(0);
                var curRowIdx = 0;
                var mixKeyLineIdx = new List<int>();
                while (row != null)
                {
                    var cell = row.GetCell(0);
                    var cellContent = TryReadCell(cell);
                    var lineNum = row.PhysicalNumberOfCells;

                    rowIdx = curRowIdx;
                    
                    if (cellContent == "##var")
                    {
                        int cIdx = 1;
                        for (; cIdx < lineNum; cIdx++)
                        {
                            var curCell = row.GetCell(cIdx);
                            var curContent = TryReadCell(curCell);
                            if (curContent.Contains("Param"))
                            {
                                mixKeyLineIdx.Add(cIdx);
                            }
                        }
                    }
                    else
                    {
                        if (cellContent != "##type" && cellContent != "##group" && cellContent != "##")
                        {
                            for (int idx = 0; idx < mixKeyLineIdx.Count; idx++)
                            {
                                lineIdx = mixKeyLineIdx[idx];
                                var curCell = row.GetCell(mixKeyLineIdx[idx]);
                                var curContent = TryReadCell(curCell);
                                if (curContent.Length > 0)
                                {
                                    if (!_stringCfgMixKeyList.Contains(curContent))
                                    {
                                        _stringCfgMixKeyList.Add(curContent);
                                        // ExcelWrite.CfgMixKeyDataList.Add(curContent, new CfgMixKeyData()
                                        // {
                                        //     key = curContent,
                                        //     rowIndex = rowIdx,
                                        //     lineIndex = lineIdx,
                                        //     sheetIndex = sheetIdx
                                        // });
                                    }
                                }
                            }
                        }
                    }
                    row = sheet.GetRow(++curRowIdx);
                }
            }
        }

        public static List<int> GetValueIndexList(string configName, List<string> keys)
        {
            var cfgPath = GenMixKeyTool.CfgPath + configName + ".xlsx";
            var workBook = GetWorkBook(cfgPath);
            if (workBook == null)
            {
                DebugUtil.LogError($"找不到配置表文件，路径: {cfgPath}");
                return null;
            }

            var keyCount = keys.Count;
            var needKeyList = GetMultipleKey(configName);
            if (needKeyList == null)
            {
                DebugUtil.LogError($"配置的Key值不对劲, 数量错误, 配置的表: {configName}, Key:{keys[0]}");
                return default;
            }
            
            if(needKeyList.Count != keyCount)
            {
                DebugUtil.LogError($"配置的Key值不对劲, 数量错误, 配置的表: {configName}, Key:{keys[0]}");
                return default;
            }

            var sheetCount = workBook.NumberOfSheets;
            var keyIdxList = new List<int>(needKeyList.Count);
            for (int i = 0; i < keyCount; i++)
            {
                keyIdxList.Add(-1);
            }
            for (int i = 0; i < sheetCount; i++)
            {
                var sheet = workBook.GetSheetAt(i);
                var row = sheet.GetRow(0);
                var rowIndex = 0;
                while (row != null)
                {
                    var cell = row.GetCell(0);
                    var content = TryReadCell(cell);
                    if (content == "##var")
                    {
                        int keyIdx = 1;
                        for (; keyIdx < row.PhysicalNumberOfCells; keyIdx++)
                        {
                            cell = row.GetCell(keyIdx);
                            content = TryReadCell(cell);
                            for (int n = 0; n < needKeyList.Count; n++)
                            {
                                if (needKeyList[n] == content)
                                {
                                    keyIdxList[n] = keyIdx;
                                }
                            }
                        }

                        if (keyIdxList.Contains(-1))
                        {
                            DebugUtil.LogError("获取索引值列表时有误，有数据为-1!!! ");
                        }
                        return keyIdxList;
                    }
                    row = sheet.GetRow(++rowIndex);
                }
            }
            
            return keyIdxList;
        }

        /// <summary>
        /// 根据索引获取到具体的配置值
        /// </summary>
        /// <param name="configName"></param>
        /// <param name="param"></param>
        /// <param name="keyIdxList"></param>
        /// <param name="indexList"></param>
        /// <returns></returns>
        public static string GetStringValByIndex(string configName, string param, List<int> keyIdxList, 
            List<string> indexList, int listIdx = 0)
        {
            var cfgPath = GenMixKeyTool.CfgPath + configName + ".xlsx";
            var workBook = GetWorkBook(cfgPath);
            if (workBook == null)
            {
                DebugUtil.LogError($"找不到配置表文件，路径: {cfgPath}");
                return null;
            }
            
            var idxCount = indexList.Count;
            if (idxCount != keyIdxList.Count)
            {
                DebugUtil.LogError($"获取配置表对应ID内容时失败，原因: keyList和indexList数量无法对应。");
                return null;
            }

            char departChar = '|';
            bool isList = false;
            var sheetCount = workBook.NumberOfSheets;
            int valueParamIdx = 0;
            //寻找对应参数那一列
            for (int i = 0; i < sheetCount; i++)
            {
                var sheet = workBook.GetSheetAt(i);
                var row = sheet.GetRow(0);
                var rowIndex = 0;
                while (row != null)
                {
                    var cell0 = row.GetCell(0);
                    var content0 = TryReadCell(cell0);
                    if (content0 == "##var")
                    {
                        for (int idx = 1; idx < row.PhysicalNumberOfCells; idx++)
                        {
                            var cell = row.GetCell(idx);
                            var content = TryReadCell(cell);
                            if (content == param)
                            {
                                valueParamIdx = idx;
                                break;
                            }
                        }
                        break;
                    }
                    
                    row = sheet.GetRow(++rowIndex);
                }
                
                //识别是否为List
                rowIndex = 0;
                row = sheet.GetRow(0);
                while (row != null)
                {
                    var cell0 = row.GetCell(0);
                    var content0 = TryReadCell(cell0);
                    if (content0 == "##type")
                    {
                        var idx = valueParamIdx;
                        var cell = row.GetCell(idx);
                        var content = TryReadCell(cell);
                        if (content.Contains("list"))
                        {
                            isList = true;
                            var length = "(list#sep=".Length;
                            departChar = content[length];
                        }
                        break;
                    }
                    
                    row = sheet.GetRow(++rowIndex);
                }

                //获取格子内容
                rowIndex = 0;
                row = sheet.GetRow(0);
                while (row != null)
                {
                    var cell0 = row.GetCell(keyIdxList[0]);
                    var content0 = TryReadCell(cell0);
                    if (content0 == indexList[0])
                    {
                        int idx = 1;
                        bool isCurRow = true;
                        for (; idx < indexList.Count; idx++)
                        {
                            var cell = row.GetCell(keyIdxList[idx]);
                            if (cell == null)
                            {
                                DebugUtil.LogError($"获取配置表对应ID内容时失败，原因: 传入的Key索引元素在配置表中不存在!!!");
                                return null;
                            }

                            var content = TryReadCell(cell);
                            if (content != indexList[idx])
                            {
                                isCurRow = false;
                                break;
                            }
                        }

                        if (isCurRow)
                        {
                            var val = TryReadCell(row.GetCell(valueParamIdx));
                            if (isList)
                            {
                                string[] strList = val.Split(departChar);
                                if (listIdx >= strList.Length)
                                {
                                    DebugUtil.LogError($"配置的list索引超出了list长度！ configName: {configName}", 
                                        $"rowIdx:{rowIndex}, valueIdx:{valueParamIdx}");
                                    return "";
                                }

                                return strList[listIdx];
                            }
                            return val;
                        }
                    }
                    row = sheet.GetRow(++rowIndex);
                }
            }

            return null;
        }

#endregion
        

        /// <summary>
        /// 获取工作簿
        /// </summary>
        /// <param name="excelPath"></param>
        /// <returns></returns>
        public static IWorkbook GetWorkBook(string excelPath)
        {
            FileStream fs = null;
            if (_cacheWorkbooks.TryGetValue(excelPath, out var workbook))
            {
                return workbook;
            }
            try
            {
                fs = new FileStream(excelPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
                _listFileStreams.Add(fs);
            }
            catch (Exception e)
            {
                Debug.LogException(e);
            }

            if (fs == null)
            {
                Debug.LogError("无法打开文件{0},跳过处理:" + excelPath);
                return null;
            }
            
            var isXlsx = excelPath.EndsWith(".xlsx", System.StringComparison.CurrentCultureIgnoreCase);
            if (isXlsx)
            {
                IWorkbook workBook = new XSSFWorkbook(fs);
                _cacheWorkbooks.TryAdd(excelPath, workBook);
                return workBook;
            }
            
            return null;
        }

        public static void InitAll()
        {
            _cacheWorkbooks.Clear();
            _listFileStreams.Clear();
        }

        public static void ReleaseAll()
        {
            for (int i = _listFileStreams.Count - 1; i >= 0; i--)
            {
                _listFileStreams[i].Close();
            }

            _cacheWorkbooks.Clear();
            _listFileStreams.Clear();
        }
        
        /// <summary>
        /// 读格子，转换成string
        /// </summary>
        /// <param name="cell"></param>
        /// <returns></returns>
        public static string TryReadCell(ICell cell)
        {
            if (cell == null)
            {
                return "";
            }
            if (cell.CellType == CellType.String)
            {
                return cell.StringCellValue;
            }
            if (cell.CellType == CellType.Numeric)
            {
                return cell.NumericCellValue.ToString(CultureInfo.InvariantCulture);
            }
            if (cell.CellType == CellType.Boolean)
            {
                return cell.BooleanCellValue.ToString();
            }
            if (cell.CellType == CellType.Blank)
            {
                return "";
            }
            Debug.LogError("暂不支持的单元格类型:" + cell.CellType + "");
            return "";
        }

        private static List<string> GetMultipleKey(string cfgName)
        {
            var cfgFullName = cfgName + ".xlsx";
            var tableCfg = GenMixKeyTool.CfgPath + "__tables__" + ".xlsx";
            var workBook = GetWorkBook(tableCfg);
            if (workBook == null)
            {
                DebugUtil.LogError("__tables__ 不存在，请检查传入路径");
                return null;
            }

            var sheetNum = workBook.NumberOfSheets;
            int cfgIdx = -1;     //配置表列索引
            int keyNumIdx = -1;  //key数量列索引
            
            //先取对应的表名和key值列索引
            for (int i = 0; i < sheetNum; i++)
            {
                var sheet = workBook.GetSheetAt(i);
                var rowIndex = 0;
                var row = sheet.GetRow(rowIndex);
                if (i == 0)
                {
                    while (row != null)
                    {
                        var cell = row.GetCell(0);
                        var content = TryReadCell(cell);
                        if (content == "##var")
                        {
                            for (int idx = 1; idx < row.PhysicalNumberOfCells; idx++)
                            {
                                var curCell = row.GetCell(idx);
                                var curContent = TryReadCell(curCell);
                                if (curContent == "input")
                                {
                                    cfgIdx = idx;
                                }

                                if (curContent == "index")
                                {
                                    keyNumIdx = idx;
                                }
                            }
                        
                            break;
                        }
                        row = sheet.GetRow(++rowIndex);
                    }
                }

                //取到后找到对应的配置表那一行，取key值判断
                rowIndex = 0;
                row = sheet.GetRow(rowIndex);
                while (row != null)
                {
                    var inputContent = TryReadCell(row.GetCell(cfgIdx));
                    if (inputContent.Contains(cfgFullName))
                    {
                        var keyContent = TryReadCell(row.GetCell(keyNumIdx));
                        if (keyContent.Contains("+"))
                        {
                            string[] list = keyContent.Split('+');
                            return list.ToList();
                        }
                        if(keyContent.Contains(","))
                        {
                            string[] list = keyContent.Split(',');
                            return new List<string> { list[0] };
                        }

                        var firstKey = GetFirstKey(cfgName);
                        return new List<string> {firstKey};
                    }
                    row = sheet.GetRow(++rowIndex);
                }
            }
            return null;
        }

        private static string GetFirstKey(string configName)
        {
            var cfgPath = GenMixKeyTool.CfgPath + configName + ".xlsx";
            var workBook = GetWorkBook(cfgPath);
            if (workBook == null)
            {
                DebugUtil.LogError($"找不到配置表文件，路径: {cfgPath}");
                return null;
            }

            var sheet = workBook.GetSheetAt(0);
            var rowIndex = 0;
            var row = sheet.GetRow(rowIndex);
            while (row != null)
            {
                var cell0 = row.GetCell(0);
                var str0 = TryReadCell(cell0);
                if (str0 == "##var")
                {
                    return TryReadCell(row.GetCell(1));
                }
                row = sheet.GetRow(++rowIndex);
            }

            return null;
        }
    }
}