using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using OfficeOpenXml;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using VOL.Core.Extensions;
using VOL.Core.Services;
using VOL.Entity.Enum;

namespace VOL.Core.Utilities
{
    public static class Tool
    {
        public static string Upload(IFormFile file, string filePath)
        {
            string fullPath = filePath.MapPath(true);
            //string fileName = $"{DateTime.Now.ToString("yyyyMMddHHmmssfff")}.{file.FileName.Split(".")[1]}";

            //string fileName = file.FileName.Split(".")[0];

            try
            {
                if (!Directory.Exists(fullPath)) Directory.CreateDirectory(fullPath);

                if (File.Exists(file.FileName))
                    File.Delete(file.FileName);
                using (var stream = new FileStream(fullPath + file.FileName, FileMode.Create))
                {
                    file.CopyTo(stream);
                }
            }
            catch (Exception ex)
            {
                Logger.Error($"上传文件失败：Tool.Upload,路径：{filePath},失败文件:{file},{ex.Message + ex.StackTrace}");
            }
            return $"{filePath}{file.FileName}";
        }
        //public static void BatchUpload(List<IFormFile> files, string filePath)
        //{
        //    string fullPath = filePath.MapPath(true);
        //    //string fileName = $"{DateTime.Now.ToString("yyyyMMddHHmmssfff")}.{file.FileName.Split(".")[1]}";
        //    try
        //    {
        //        if (!Directory.Exists(fullPath)) Directory.CreateDirectory(fullPath);

        //        foreach (var file in files)
        //        {
        //            string fileName = file.FileName.Split(".")[0];

        //            if (File.Exists(fileName))
        //                File.Delete(fileName);
        //            using (var stream = new FileStream(fullPath + fileName, FileMode.Create))
        //            {
        //                file.CopyTo(stream);
        //            }
        //        }
        //    }
        //    catch (Exception ex)
        //    {
        //        Logger.Error($"上传文件失败：Tool.Upload,路径：{filePath},失败文件:{files},{ex.Message + ex.StackTrace}");
        //    }
        //    //return $"{filePath}{fileName}{file.FileName.Split(".")[1]}";
        //}

        public static byte[] UploadFile(IFormFile file)
        {
            if (file != null && file.Length > 0)
            {
                using (var memoryStream = new MemoryStream())
                {
                    file.CopyTo(memoryStream);
                    var fileData = memoryStream.ToArray();

                    return fileData;
                }
            }
            else
            {
                throw new Exception("未选择文件或文件大小为零。");
            }
        }

        public static byte[] ExportToExcel<T>(Dictionary<string, List<T>> sheetDataList, List<string> fields)
        {
            using (var package = new ExcelPackage(new FileInfo("filename.xlsx")))
            {
                var sheetCount = sheetDataList.Count;

                foreach (var sheet in sheetDataList)
                {
                    var sheetData = sheetDataList[sheet.Key];
                    var sheetName = sheet.Key;

                    var worksheet = package.Workbook.Worksheets.Add(sheetName);
                    ConfigureWorksheet<T>(worksheet, sheetData, fields);
                }

                return package.GetAsByteArray();
            }
        }

        /// <summary>
        /// 通用导入Excel
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="fileStream"></param>
        /// <returns></returns>
        public static List<T> ConvertExcelToList<T>(Stream fileStream) where T : new()
        {
            var result = new List<T>();

            using (var package = new ExcelPackage(fileStream))
            {
                var worksheet = package.Workbook.Worksheets[1]; // 第一个工作表

                if (worksheet.Dimension == null)
                    throw new InvalidOperationException("工作表中没有任何数据。");

                // 获取表头（第一行）
                var headerRow = worksheet.Cells[1, 1, 1, worksheet.Dimension.End.Column];
                var headers = headerRow.Select(cell => cell.Text?.Trim()).ToList();

                // 获取实体属性与显示名称的映射
                var displayNameToPropertyMap = GetDisplayNameToPropertyMap<T>();

                // 从第二行开始解析数据
                for (int row = 2; row <= worksheet.Dimension.End.Row; row++)
                {
                    var dataObject = new T();

                    for (int col = 1; col <= displayNameToPropertyMap.Count; col++)
                    {
                        var header = headers[col - 1];
                        if (string.IsNullOrEmpty(header))
                            continue;

                        if (!displayNameToPropertyMap.TryGetValue(header, out var property))
                            continue; // 找不到对应属性，忽略该列

                        try
                        {
                            var cellValue = worksheet.Cells[row, col].GetValue<object>();
                            var propertyType = property.PropertyType;

                            // ----- 日期类型处理（支持 DateTime / DateTime?）-----
                            if (propertyType == typeof(DateTime) || propertyType == typeof(DateTime?))
                            {
                                DateTime? parsedDate = null;

                                // 情况1：Excel 日期存储为 OADate 数字
                                if (cellValue is double numericValue)
                                {
                                    parsedDate = DateTime.FromOADate(numericValue);
                                }
                                // 情况2：字符串格式的日期
                                else if (cellValue is string dateStr && !string.IsNullOrWhiteSpace(dateStr))
                                {
                                    // 支持多种常见日期格式
                                    string[] formats = new[]
                                    {
                                    "yyyy/M/d",      // 2025/4/28
                                    "yyyy/MM/dd",    // 2025/04/28
                                    "M/d/yyyy",      // 4/28/2025
                                    "yyyy-MM-dd",    // 2025-04-28
                                    "dd/MM/yyyy",    // 28/04/2025
                                    "yyyyMMdd",      // 20250428
                                    "d/M/yyyy"       // 28/4/2025
                                };

                                    if (DateTime.TryParseExact(dateStr, formats, CultureInfo.InvariantCulture,
                                                               DateTimeStyles.None, out DateTime dt))
                                    {
                                        parsedDate = dt;
                                    }
                                    else if (DateTime.TryParse(dateStr, out dt))  // 兜底尝试系统解析
                                    {
                                        parsedDate = dt;
                                    }
                                    else
                                    {
                                        throw new InvalidCastException($"无法将字符串 '{dateStr}' 转换为有效的日期。");
                                    }
                                }
                                // 情况3：已经是 DateTime 实例（极少情况）
                                else if (cellValue is DateTime dtValue)
                                {
                                    parsedDate = dtValue;
                                }

                                // 根据属性是否可空赋值
                                if (propertyType == typeof(DateTime))
                                {
                                    if (parsedDate.HasValue)
                                        property.SetValue(dataObject, parsedDate.Value);
                                    else
                                        throw new InvalidCastException($"单元格值为空，无法赋给非空 DateTime 属性 '{property.Name}'。");
                                }
                                else // DateTime?
                                {
                                    property.SetValue(dataObject, parsedDate);
                                }

                                // 日期处理完成，跳过后续通用类型转换
                                continue;
                            }

                            // ----- 其他类型（int, double, string, bool, 枚举等）-----
                            if (cellValue != null)
                            {
                                // 目标类型是枚举
                                if (propertyType.IsEnum)
                                {
                                    // 尝试按字符串或数值转换
                                    if (cellValue is string enumStr)
                                        cellValue = Enum.Parse(propertyType, enumStr, true);
                                    else
                                        cellValue = Enum.ToObject(propertyType, Convert.ChangeType(cellValue, Enum.GetUnderlyingType(propertyType)));
                                }
                                else
                                {
                                    // 常规类型转换（如 string -> int, double -> int 等）
                                    cellValue = Convert.ChangeType(cellValue, propertyType);
                                }
                                property.SetValue(dataObject, cellValue);
                            }
                        }
                        catch (Exception ex)
                        {
                            throw new InvalidCastException(
                                $"行 {row} 列 {col}（列名: {header}）：转换 Excel 单元格值 '{worksheet.Cells[row, col].Text}' 到属性 '{property.Name}' 失败。",
                                ex);
                        }
                    }

                    result.Add(dataObject);
                }
            }

            return result;
        }

        private static Dictionary<string, PropertyInfo> GetDisplayNameToPropertyMap<T>()
        {
            var properties = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);
            var dict = new Dictionary<string, PropertyInfo>(StringComparer.OrdinalIgnoreCase);

            foreach (var prop in properties)
            {
                // 优先获取 DisplayAttribute 的 Name
                var displayAttr = prop.GetCustomAttribute<DisplayAttribute>();
                if (displayAttr != null && !string.IsNullOrEmpty(displayAttr.Name))
                {
                    dict[displayAttr.Name] = prop;
                    continue;
                }

                // 其次获取 DisplayNameAttribute
                var displayNameAttr = prop.GetCustomAttribute<DisplayNameAttribute>();
                if (displayNameAttr != null && !string.IsNullOrEmpty(displayNameAttr.DisplayName))
                {
                    dict[displayNameAttr.DisplayName] = prop;
                    continue;
                }

                // 最后使用属性原名
                dict[prop.Name] = prop;
            }

            return dict;
        }

        private static Dictionary<string, string> GetDisplayNames<T>()
        {
            var displayNames = new Dictionary<string, string>();
            var properties = typeof(T).GetProperties();
            foreach (var property in properties)
            {
                var displayNameAttribute = property.GetCustomAttribute<DisplayAttribute>();
                if (displayNameAttribute != null)
                {
                    var propertyName = property.Name;
                    var displayName = displayNameAttribute.Name;
                    displayNames[propertyName] = displayName;
                }
            }
            return displayNames;
        }
        /// <summary>
        /// 导出Excel
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="worksheet"></param>
        /// <param name="sheetData"></param>
        /// <param name="fields"></param>
        private static void ConfigureWorksheet<T>(ExcelWorksheet worksheet, IEnumerable<T> sheetData, List<string> fields)
        {
            // 添加表头
            for (int i = 0; i < fields.Count; i++)
            {
                var fieldName = fields[i];
                var displayName = GetDisplayName<T>(fieldName);

                worksheet.Cells[1, i + 1].Value = displayName;
            }

            // 添加数据行
            var dataList = sheetData.ToList();
            for (int rowIndex = 0; rowIndex < dataList.Count; rowIndex++)
            {
                var rowData = dataList[rowIndex];
                for (int colIndex = 0; colIndex < fields.Count; colIndex++)
                {
                    var fieldName = fields[colIndex];
                    var value = GetPropertyValue(rowData, fieldName);

                    // 设置值时处理日期时间
                    if (value is DateTime dateTimeValue)
                    {
                        worksheet.Cells[rowIndex + 2, colIndex + 1].Value = dateTimeValue;
                        worksheet.Cells[rowIndex + 2, colIndex + 1].Style.Numberformat.Format = "yyyy-mm-dd hh:mm:ss";
                    }
                    else
                    {
                        worksheet.Cells[rowIndex + 2, colIndex + 1].Value = value;
                    }
                }
            }

            // 自动调整列宽
            worksheet.Cells.AutoFitColumns();
        }
        private static string GetDisplayName<T>(string propertyName)
        {
            var property = typeof(T).GetProperty(propertyName);
            if (property != null)
            {
                var displayNameAttribute = property.GetCustomAttributes(typeof(DisplayAttribute), false).FirstOrDefault() as DisplayAttribute;
                if (displayNameAttribute != null)
                {
                    return displayNameAttribute.Name;
                }
            }

            return propertyName;
        }
        private static object GetPropertyValue<T>(T obj, string propertyName)
        {
            var property = typeof(T).GetProperty(propertyName);
            return property?.GetValue(obj);
        }

        /// <summary>
        /// 获取类中所有得列名
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <returns></returns>
        public static List<string> GetPropertyNames<T>()
        {
            var propertyNames = new List<string>();
            var properties = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);

            foreach (var property in properties)
            {
                // 获取属性上的 DisplayAttribute 特性
                var displayAttribute = property.GetCustomAttribute<DisplayAttribute>();

                // 检查 DisplayAttribute 特性的名称是否为 "IgnoreColumnAttribute"，如果是，则忽略该属性
                if (displayAttribute != null && displayAttribute.Name.ToLower() == "ignorecolumnattribute")
                {
                    continue;
                }

                propertyNames.Add(property.Name);
            }

            return propertyNames;
        }

        public static string NumberToChinese(this int number)
        {
            // 定义中文数字数组
            string[] chineseNumbers = { "零", "一", "二", "三", "四", "五", "六", "七", "八", "九" };

            // 如果数字在 0 到 9 之间，则直接返回中文数字
            if (number >= 0 && number <= 9)
            {
                return chineseNumbers[number];
            }
            else
            {
                // 如果数字不在 0 到 9 之间，则抛出异常
                throw new ArgumentOutOfRangeException(nameof(number), "Number must be between 0 and 9.");
            }
        }

        public static string IncrementId(string maxId)
        {
            // 获取当前日期的前缀（年年年年+月月+日日）
            string datePrefix = DateTime.Now.ToString("yyyyMMdd");

            // 提取后4位编号部分
            string numberPart = maxId.Substring(maxId.Length - 4);

            // 将编号部分转为整数并加1
            if (!int.TryParse(numberPart, out int number))
            {
                throw new InvalidOperationException("编号部分格式不正确，应为数字");
            }

            // 检查编号是否超出范围
            if (number >= 9999)
            {
                throw new InvalidOperationException("编号已达到最大值");
            }

            // 返回新的编号，保持当前日期前缀和递增后的编号
            return $"{datePrefix}{(number + 1):D4}";
        }

        /// <summary>
        /// 获取集合中位数
        /// </summary>
        /// <param name="values"></param>
        /// <returns></returns>
        public static double Median(this List<float> values)
        {
            var sortedValues = values.OrderBy(x => x).ToList();
            int count = sortedValues.Count;
            if (count % 2 == 0)
            {
                return (sortedValues[count / 2 - 1] + sortedValues[count / 2]) / 2.0;
            }
            else
            {
                return sortedValues[count / 2];
            }
        }

        /// <summary>
        /// 获取集合中位数
        /// </summary>
        /// <param name="values"></param>
        /// <returns></returns>
        public static double? Median(this List<double?> values)
        {
            // 过滤掉 null 值
            var sortedValues = values.Where(x => x.HasValue)
                                     .Select(x => x.Value)
                                     .OrderBy(x => x)
                                     .ToList();

            // 如果列表为空，返回 null
            if (sortedValues.Count == 0)
                return null;

            int count = sortedValues.Count;

            // 计算中位数
            if (count % 2 == 0)
            {
                return (sortedValues[count / 2 - 1] + sortedValues[count / 2]) / 2.0;
            }
            else
            {
                return sortedValues[count / 2];
            }
        }


        /// <summary>
        /// 获取取样时间
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        /// <exception cref="ArgumentException"></exception>
        public static DateTime GetDateTimeFromFixedAsh(this string input)
        {
            string timePart;

            // 判断字符串中是否包含 '-'，以确定截取的位置
            int dashIndex = input.IndexOf('-');
            if (dashIndex != -1)
            {
                // 截取 '-' 之前的部分
                timePart = input.Substring(6, dashIndex - 6);
            }
            else
            {
                // 如果没有 '-'，则直接截取后面的8位数字
                timePart = input.Substring(6, 8);
            }

            // 将截取的时间字符串转换为 DateTime 类型
            DateTime result;
            if (DateTime.TryParseExact(timePart, "yyyyMMdd", null, System.Globalization.DateTimeStyles.None, out result))
            {
                return result;
            }
            else
            {
                throw new ArgumentException("时间转换失败");
            }
        }

        /// <summary>
        /// 获取枚举所有描述
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <typeparam name="TEnum"></typeparam>
        /// <param name="createItemFunc"></param>
        /// <returns></returns>
        public static List<T> GetEnumDescriptions<T, TEnum>(Func<int, string, T> createItemFunc) where TEnum : Enum
        {
            var enumDescriptions = new List<T>();

            foreach (TEnum value in Enum.GetValues(typeof(TEnum)))
            {
                int intValue = Convert.ToInt32(value);
                if (intValue >= 1)
                {
                    var descriptionAttribute = value.GetType()
                        .GetField(value.ToString())
                        .GetCustomAttributes(typeof(DescriptionAttribute), false)
                        .FirstOrDefault() as DescriptionAttribute;

                    if (descriptionAttribute != null)
                    {
                        var item = createItemFunc(intValue, descriptionAttribute.Description);
                        enumDescriptions.Add(item);
                    }
                }
            }

            return enumDescriptions;
        }

        /// <summary>
        /// 获取枚举描述
        /// </summary>
        /// <param name="value"></param>
        /// <returns></returns>
        public static string GetDescription(this Enum value)
        {
            if (value == null)
            {
                throw new ArgumentNullException(nameof(value), "Enum value cannot be null");
            }

            // 获取字段信息
            FieldInfo field = value.GetType().GetField(value.ToString());

            if (field == null)
            {
                // 如果字段信息为空，返回默认的描述
                return "";
            }

            // 获取 DescriptionAttribute 特性
            var attributes = field.GetCustomAttributes(typeof(DescriptionAttribute), false);
            var attribute = attributes.FirstOrDefault() as DescriptionAttribute;

            // 如果特性为空，返回空字符串
            return attribute?.Description ?? "";
        }


        /// <summary>
        /// 测试类型枚举转换
        /// </summary>
        /// <param name="itemCode"></param>
        /// <returns></returns>
        //public static CategoryEnumType? GetCategoryEnumTypeByItemCode(string itemCode)
        //{
        //    if (Enum.TryParse(typeof(Ai_CategoryEnumType), itemCode, true, out var aiCategoryEnum))
        //    {
        //        var aiCategoryName = Enum.GetName(typeof(Ai_CategoryEnumType), aiCategoryEnum);
        //        if (Enum.TryParse(typeof(CategoryEnumType), aiCategoryName, true, out var categoryEnum))
        //        {
        //            return (CategoryEnumType)categoryEnum;
        //        }
        //    }
        //    return null; // 如果找不到对应的映射值，返回 null 或者抛出异常
        //}

        public static byte[] DicExportToExcel(Dictionary<string, List<Dictionary<string, string>>> sheetDataList)
        {
            using (var package = new ExcelPackage())
            {
                foreach (var sheet in sheetDataList)
                {
                    var sheetName = sheet.Key;
                    var sheetData = sheet.Value;

                    var worksheet = package.Workbook.Worksheets.Add(sheetName);
                    DicConfigureWorksheet(worksheet, sheetData);
                }

                return package.GetAsByteArray();
            }
        }
        private static void DicConfigureWorksheet(ExcelWorksheet worksheet, List<Dictionary<string, string>> sheetData)
        {
            // 假设所有字典在List中都有相同的Key集合，我们可以从第一个元素获取表头
            if (sheetData.Count > 0)
            {
                int rowIndex = 1; // 从第一行开始
                var firstRow = sheetData[0];

                // 添加表头
                int columnIndex = 1; // 从第一列开始
                foreach (var header in firstRow)
                {
                    worksheet.Cells[1, columnIndex++].Value = header.Key;
                }

                // 添加数据行
                foreach (var rowDict in sheetData)
                {
                    rowIndex++;
                    columnIndex = 1; // 重置列索引
                    foreach (var cell in rowDict)
                    {
                        worksheet.Cells[rowIndex, columnIndex].Value = cell.Value;

                        // 检查是否需要设置日期时间格式
                        if (DateTime.TryParse(cell.Value, out DateTime dateTimeValue))
                        {
                            worksheet.Cells[rowIndex, columnIndex].Style.Numberformat.Format = "yyyy-mm-dd hh:mm:ss";
                        }
                        columnIndex++;
                    }
                }

                // 自动调整列宽
                worksheet.Cells[worksheet.Dimension.Address].AutoFitColumns();
            }
        }

        public static DateTime GetQuarterStartDate(int quarter, int year)
        {
            return quarter switch
            {
                1 => new DateTime(year, 1, 1),
                2 => new DateTime(year, 4, 1),
                3 => new DateTime(year, 7, 1),
                4 => new DateTime(year, 10, 1),
                _ => throw new ArgumentOutOfRangeException()
            };
        }

        public static DateTime GetQuarterEndDate(int quarter, int year)
        {
            return quarter switch
            {
                1 => new DateTime(year, 3, 31),
                2 => new DateTime(year, 6, 30),
                3 => new DateTime(year, 9, 30),
                4 => new DateTime(year, 12, 31),
                _ => throw new ArgumentOutOfRangeException()
            };
        }

        public static IQueryable<T> WhereIF<T>(this IQueryable<T> query, bool condition, Expression<Func<T, bool>> predicate)
        {
            return condition ? query.Where(predicate) : query;
        }

        /// <summary>
        /// DateTime转时间戳
        /// </summary>
        /// <param name="dateTime"></param>
        /// <returns></returns>
        public static long ToUnixTimeMilliseconds(this DateTime dateTime)
        {
            return new DateTimeOffset(dateTime).ToUnixTimeMilliseconds();
        }

        public static string GetEnumNameByValue(int value)
        {
            if (Enum.IsDefined(typeof(SportsTestItemType), value))
            {
                return ((SportsTestItemType)value).ToString();
            }
            return ""; // Return an empty string if the value is not defined in the enum
        }

        /// <summary>
        /// 获取分数等级
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="score"></param>
        /// <returns></returns>
        public static string GetRank<T>(this T score) where T : struct, IComparable
        {
            // 将 score 转换为 double 进行比较
            double value = Convert.ToDouble(score);

            return value switch
            {
                >= 90 => "优秀",
                >= 80 => "良好",
                >= 60 => "及格",
                _ => "不及格"
            };
        }

        /// <summary>
        /// 根据等级名称返回枚举
        /// </summary>
        /// <param name="rankName"></param>
        /// <returns></returns>
        /// <exception cref="ArgumentException"></exception>
        public static AchievementRank GetEnumByRankName(string rankName)
        {
            return rankName switch
            {
                "优秀" => AchievementRank.Excellent,
                "良好" => AchievementRank.Fine,
                "及格" => AchievementRank.Pass,
                "不及格" => AchievementRank.Fail,
                _ => throw new ArgumentException("Invalid rank name", nameof(rankName)) // Throw exception for invalid rank name
            };
        }
        public static string ToChineseNumber(this int number)
        {
            string[] chineseNumbers = { "零", "一", "二", "三", "四", "五", "六", "七", "八", "九" };

            if (number <= 0)
                throw new ArgumentException("Number must be greater than zero.");

            if (number < 10)
                return chineseNumbers[number];

            if (number < 20)
                return "十" + (number % 10 == 0 ? "" : chineseNumbers[number % 10]);

            int tens = number / 10;
            int units = number % 10;

            return chineseNumbers[tens] + "十" + (units == 0 ? "" : chineseNumbers[units]);
        }
    }
}