using KellyReport_D.Properties;
using System.Windows.Forms;
using Microsoft.Office.Interop.Excel;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using KellyReport_D.Model;

namespace KellyReport_D.Utils
{
    internal static class WorkBookUtils
    {
        public static void importSalesDetailFromWorkBook(Workbook workbook)
        {
            var importContext = new ImportContext()
            {
                Application = Globals.ThisAddIn.Application,
                ImportWorkbook = workbook,
                SalesWorksheets = new List<Worksheet>(),
            };

            // 获取「客户资料」工作表
            ReadClientContact(importContext);
            // 读取「销售明细」工作表
            ReadSalesDetails(importContext);
            foreach (var userGroupedSalesDetail in importContext.GroupedSalesDetailBySalesName)
            {
                var userSheet = GenUserSalesDetailSheet(importContext, userGroupedSalesDetail);
                PrepareTotalHeader(userSheet);
                WriteSalesDetailsData(importContext, userGroupedSalesDetail, userSheet);

                importContext.SalesWorksheets.Add(userSheet);
            }

            GenSalesTotal(importContext);

            // 更新业务预估表
            UpdateEstimatedTable(importContext);
        }

        private static void UpdateEstimatedTable(ImportContext importContext)
        {
            var app = importContext.Application;
            Worksheet bussenessWorksheet = null;

            foreach (Worksheet item in app.Worksheets)
            {
                if (item.Name == "業務月達成率")
                {
                    bussenessWorksheet = item;
                    break;
                }
            };

            if (bussenessWorksheet == null)
            {
                throw new EntryPointNotFoundException("未找到「業務月達成率」工作表，请先生成预估表。");
            }

            bussenessWorksheet.Activate();
            Range usedRange = bussenessWorksheet.UsedRange;
            int maxColIndex = usedRange.Columns.Count;

            for (int i = 2; i < maxColIndex; i += 4)
            {
                String salesName = bussenessWorksheet.Cells[1, i].Value2;
                if (string.IsNullOrWhiteSpace(salesName))
                {
                    continue;
                }

                var salesDetails = salesName.ToUpper() == "TOTAL" ?
                    importContext.SalesDetails :
                    importContext.GroupedSalesDetailBySalesName.FirstOrDefault(x => x.SalesName.ToUpper() == salesName.ToUpper())?.Details;

                if (salesDetails == null)
                    continue;

                salesDetails.GroupBy(x => x.Month)
                    .Select(grouped => new
                    {
                        Month = grouped.Key,
                        TotalAmount = grouped.Sum(x => x.TotalAmount ?? 0),
                    })
                    .ToList()
                    .ForEach(monthlySales =>
                    {
                        int startRowIndex = 3;
                        for (int rowIndex = startRowIndex; rowIndex < startRowIndex + 12; rowIndex++)
                        {
                            var monthCell = bussenessWorksheet.Cells[rowIndex, 1];
                            if (monthCell.Value2 != null && monthCell.Value2.ToString() == monthlySales.Month)
                            {
                                var forecsastColLetter = GetColumnLetter(i);

                                var turnoverCell = bussenessWorksheet.Cells[rowIndex, i + 1];
                                var turnoverColLetter = GetColumnLetter(i + 1);

                                turnoverCell.Value2 = monthlySales.TotalAmount;
                                turnoverCell.NumberFormat = "#,##0";

                                var completionCell = bussenessWorksheet.Cells[rowIndex, i + 2];
                                completionCell.formula = $"={turnoverColLetter}{rowIndex}/{forecsastColLetter}{rowIndex}";
                                completionCell.NumberFormat = "0.00%";

                                var accCompletionCell = bussenessWorksheet.Cells[rowIndex, i + 3];
                                accCompletionCell.formula = $"=SUM(${turnoverColLetter}${startRowIndex}:{turnoverColLetter}{rowIndex})/SUM(${forecsastColLetter}${startRowIndex}:{forecsastColLetter}{rowIndex})";
                                accCompletionCell.NumberFormat = "0.00%";

                                break;
                            }
                        }
                    });

            }

        }

        private static void GenSalesTotal(ImportContext context)
        {
            var app = context.Application;
            var totalWorksheet = CreateSheetIfNotExisted(app, "JQ Total(Total)");

            PrepareTotalHeader(totalWorksheet);
            int totalRowIndex = 4;
            foreach (var userSheet in context.SalesWorksheets)
            {
                Range usedRange = userSheet.UsedRange;
                int rowIndexStart = 4;
                int rowIndexEnd = usedRange.Rows.Count;

                int rowCount = rowIndexEnd - rowIndexStart + 1;
                if (rowCount > 1)
                {
                    Range sourceRange = userSheet.Range[
                        userSheet.Cells[rowIndexStart, 1],
                        userSheet.Cells[rowIndexEnd, usedRange.Columns.Count]
                    ];

                    int totalRowIndexEnd = totalRowIndex + rowCount;
                    Range targetRange = totalWorksheet.Range[
                        totalWorksheet.Cells[totalRowIndex, 1],
                        totalWorksheet.Cells[totalRowIndexEnd, usedRange.Columns.Count]
                    ];
                    sourceRange.Copy(targetRange);
                    totalRowIndex = totalRowIndexEnd;
                }
            }

            totalWorksheet.Cells[totalRowIndex, 1].Value = "總結";
            var sumRange = totalWorksheet.Range[
                totalWorksheet.Cells[totalRowIndex, 1],
                totalWorksheet.Cells[totalRowIndex + 4, 5]
            ];
            sumRange.Merge();

            int sumColStart = 13; // L列是第12列
            totalWorksheet.Cells[totalRowIndex, 11].Value2 = "總銷量及金額(未稅)";
            for (int i = 0; i < 12; i++)
            {
                int quantityColIndex = sumColStart + i * 3 + 1;
                string quantityColLetter = GetColumnLetter(quantityColIndex);
                totalWorksheet.Cells[totalRowIndex, quantityColIndex].formula = $"=(SUM({quantityColLetter}4:{quantityColLetter}{totalRowIndex - 1})/2)";

                int amountColIndex = sumColStart + i * 3 + 2;
                string amountColLetter = GetColumnLetter(amountColIndex);
                totalWorksheet.Cells[totalRowIndex, amountColIndex].formula = $"=((SUM({amountColLetter}4:{amountColLetter}{totalRowIndex - 1})/2) - {amountColLetter}{totalRowIndex + 2})/1.13";
            }
            string totalQuantityColLetter = GetColumnLetter(49);
            string totalAmountColLetter = GetColumnLetter(50);

            totalWorksheet.Cells[totalRowIndex, 49].formula = $"=(SUM({totalQuantityColLetter}4:{totalAmountColLetter}{totalRowIndex - 1})/2)";
            totalWorksheet.Cells[totalRowIndex, 50].formula = $"=((SUM({totalAmountColLetter}4:{totalAmountColLetter}{totalRowIndex - 1})/2) - {totalAmountColLetter}{totalRowIndex + 2})/1.13";


            totalRowIndex++;
            totalWorksheet.Cells[totalRowIndex, 11].Value2 = "總銷量及金額(含稅)";
            for (int i = 0; i < 12; i++)
            {
                int quantityColIndex = sumColStart + i * 3 + 1;
                string quantityColLetter = GetColumnLetter(quantityColIndex);
                totalWorksheet.Cells[totalRowIndex, quantityColIndex].formula = $"=(SUM({quantityColLetter}4:{quantityColLetter}{totalRowIndex - 1})/2)";

                int amountColIndex = sumColStart + i * 3 + 2;
                string amountColLetter = GetColumnLetter(amountColIndex);
                totalWorksheet.Cells[totalRowIndex, amountColIndex].formula = $"=(SUM({amountColLetter}4:{amountColLetter}{totalRowIndex - 1})/2)";
            }
            totalWorksheet.Cells[totalRowIndex, 49].formula = $"=(SUM({totalQuantityColLetter}4:{totalQuantityColLetter}{totalRowIndex - 1})/2)";
            totalWorksheet.Cells[totalRowIndex, 50].formula = $"=(SUM({totalAmountColLetter}4:{totalAmountColLetter}{totalRowIndex - 1})/2)";

            totalRowIndex++;
            totalWorksheet.Cells[totalRowIndex, 11].Value2 = "總銷量及金額(外銷)";
            for (int i = 0; i < 12; i++)
            {
                int quantityColIndex = sumColStart + i * 3 + 1;
                totalWorksheet.Cells[totalRowIndex, quantityColIndex].Value2 = 0;

                int amountColIndex = sumColStart + i * 3 + 2;
                totalWorksheet.Cells[totalRowIndex, amountColIndex].Value2 = 0;
            }
            totalWorksheet.Cells[totalRowIndex, 49].Value2 = 0;
            totalWorksheet.Cells[totalRowIndex, 50].Value2 = 0;

            totalRowIndex++;
            totalWorksheet.Cells[totalRowIndex, 11].Value2 = "總銷量及金額(內外銷)";
            for (int i = 0; i < 12; i++)
            {
                int quantityColIndex = sumColStart + i * 3 + 1;
                string quantityColLetter = GetColumnLetter(quantityColIndex);
                totalWorksheet.Cells[totalRowIndex, quantityColIndex].formula = $"={quantityColLetter}{totalRowIndex - 3}+{quantityColLetter}{totalRowIndex - 1}";

                int amountColIndex = sumColStart + i * 3 + 2;
                string amountColLetter = GetColumnLetter(amountColIndex);
                totalWorksheet.Cells[totalRowIndex, amountColIndex].formula = $"={amountColLetter}{totalRowIndex - 3}+{amountColLetter}{totalRowIndex - 1}";
            }
            totalWorksheet.Cells[totalRowIndex, 49].formula = $"={totalQuantityColLetter}{totalRowIndex - 3}+{totalQuantityColLetter}{totalRowIndex - 1}";
            totalWorksheet.Cells[totalRowIndex, 50].formula = $"={totalAmountColLetter}{totalRowIndex - 3}+{totalAmountColLetter}{totalRowIndex - 1}";

            // 自适应所有已用列宽
            FormatSheetStyle(totalWorksheet);

            totalWorksheet.Cells[4, 12].Select();
            totalWorksheet.Application.ActiveWindow.FreezePanes = true;
        }

        private static void FormatSheetStyle(Worksheet worksheet)
        {
            worksheet.Activate();

            // 自适应所有已用列宽
            Range usedRange2 = worksheet.UsedRange;
            if (usedRange2 != null)
            {
                usedRange2.Columns.AutoFit();
                usedRange2.Borders.LineStyle = XlLineStyle.xlContinuous;
                usedRange2.Borders.Weight = XlBorderWeight.xlThin;
            }
        }


        // 列号转字母方法
        private static string GetColumnLetter(int col)
        {
            string colLetter = "";
            while (col > 0)
            {
                int mod = (col - 1) % 26;
                colLetter = (char)(65 + mod) + colLetter;
                col = (col - mod - 1) / 26;
            }
            return colLetter;
        }

        public static void WriteSalesDetailsData(
            ImportContext context,
            ImportContext.GroupedSalesDetailModel userGroupedSalesDetail,
            Worksheet userSheet
        )
        {
            int rowIndex = 4; // 从第四行开始写入数据
            var clientSalesList = context.GetGroupedSalesDetailByClientName(userGroupedSalesDetail.Details);
            foreach (var clientSalesDetail in clientSalesList)
            {
                ClientContact clientContact = context.ClientContactList.FirstOrDefault(x => x.Name == clientSalesDetail.ClientName) ?? new ClientContact
                {
                    Name = clientSalesDetail.ClientName,
                };

                var productSalesList = clientSalesDetail.Details
                    .GroupBy(x => x.ProductNameEN)
                    .Select(grouped => new ImportContext.GroupedSalesDetailModel
                    {
                        SalesName = clientSalesDetail.SalesName,
                        ClientName = clientSalesDetail.ClientName,
                        ProductNameEN = grouped.Key,
                        TotalAmount = grouped.Sum(x => x.TotalAmount ?? 0),
                        Quantity = grouped.Sum(x => x.Quantity ?? 0),
                        Details = grouped.ToList()
                    });
                rowIndex = WriteSalesDetailToSheet(userSheet, rowIndex, clientContact, productSalesList);

                // 客户销量汇总
                var totalSales = new List<ImportContext.GroupedSalesDetailModel>()
                {
                    new ImportContext.GroupedSalesDetailModel
                    {
                        SalesName = clientSalesDetail.SalesName,
                        ClientName = clientSalesDetail.ClientName,
                        ProductNameEN = "總銷售額",
                        TotalAmount = clientSalesDetail.TotalAmount,
                        Quantity = clientSalesDetail.Quantity,
                        Details = clientSalesDetail.Details.Aggregate(
                            new List<SalesDetail>(),
                            (accDetail, curDetail) => {
                                var monthSales = accDetail.FirstOrDefault(x => x.Month == curDetail.Month);
                                if (monthSales == null)
                                {
                                    monthSales = new SalesDetail
                                    {
                                        Month = curDetail.Month,
                                        SalesName = curDetail.SalesName,
                                        ProductNameEN = "總銷售額",
                                        Quantity = 0,
                                        Tax = 0,
                                        TotalAmount = 0,
                                        PriceWithTax = 0,
                                        AmountWithoutTax = 0
                                    };
                                    accDetail.Add(monthSales);
                                }

                                monthSales.Quantity += curDetail.Quantity;
                                monthSales.Tax += curDetail.Tax;
                                monthSales.TotalAmount += curDetail.TotalAmount;
                                //monthSales.PriceWithTax += curDetail.PriceWithTax;
                                monthSales.AmountWithoutTax += curDetail.AmountWithoutTax;

                                return accDetail;
                            })
                    }
                };

                rowIndex = WriteSalesDetailToSheet(userSheet, rowIndex, clientContact, totalSales);
            }

            FormatSheetStyle(userSheet);

            userSheet.Cells[4, 12].Select();
            userSheet.Application.ActiveWindow.FreezePanes = true;
        }

        private static int WriteSalesDetailToSheet(Worksheet userSheet, int rowIndex, ClientContact clientContact, IEnumerable<ImportContext.GroupedSalesDetailModel> salesDetailList)
        {
            foreach (var productSalesDetail in salesDetailList)
            {
                userSheet.Cells[rowIndex, 1].Value2 = productSalesDetail.SalesName;
                userSheet.Cells[rowIndex, 2].Value2 = clientContact.Region;
                userSheet.Cells[rowIndex, 3].Value2 = clientContact.Industry;
                userSheet.Cells[rowIndex, 4].Value2 = clientContact.AnnualCapacity;
                userSheet.Cells[rowIndex, 5].Value2 = clientContact.Name;
                userSheet.Cells[rowIndex, 6].Value2 = clientContact.PurchasingManager;
                userSheet.Cells[rowIndex, 7].Value2 = clientContact.PurchasingManagerPhone;
                userSheet.Cells[rowIndex, 8].Value2 = clientContact.Purchaser;
                userSheet.Cells[rowIndex, 9].Value2 = clientContact.PurchaserPhone;
                userSheet.Cells[rowIndex, 10].Value2 = clientContact.Address;
                userSheet.Cells[rowIndex, 11].Value2 = productSalesDetail.ProductNameEN;

                // 计算每月的数量和金额
                int monthCol = 13; // L列是第12列
                for (int i = 1; i < 13; i++)
                {
                    int monthCounter = 0;
                    var monthDetail = productSalesDetail.Details.Where(x => x.Month == $"{i}月")
                        .Aggregate(new SalesDetail()
                        {
                            Month = $"{i}月",
                            Quantity = 0,
                            TotalAmount = 0,
                            PriceWithTax = 0,
                            AmountWithoutTax = 0,
                            Tax = 0
                        }, (accSalesModel, curSalesModel) =>
                        {
                            accSalesModel.Quantity += (curSalesModel.Quantity ?? 0);
                            accSalesModel.TotalAmount += (curSalesModel.TotalAmount ?? 0);
                            accSalesModel.PriceWithTax += (curSalesModel.PriceWithTax ?? 0);
                            monthCounter++;

                            return accSalesModel;
                        });
                    if (monthCounter > 1)
                    {
                        monthDetail.PriceWithTax = monthDetail.PriceWithTax / monthCounter;
                    }

                    if (monthDetail == null)
                    {
                        userSheet.Cells[rowIndex, monthCol + (i - 1) * 3].Value2 = 0; // 單價
                        userSheet.Cells[rowIndex, monthCol + (i - 1) * 3 + 1].Value2 = 0; // 數量
                        userSheet.Cells[rowIndex, monthCol + (i - 1) * 3 + 2].Value2 = 0; // 金額
                    }
                    else
                    {
                        userSheet.Cells[rowIndex, monthCol + (i - 1) * 3].Value2 = monthDetail.PriceWithTax ?? 0; // 單價
                        userSheet.Cells[rowIndex, monthCol + (i - 1) * 3 + 1].Value2 = monthDetail.Quantity ?? 0; // 數量
                        userSheet.Cells[rowIndex, monthCol + (i - 1) * 3 + 2].Value2 = monthDetail.TotalAmount ?? 0; // 总额
                    }
                }
                userSheet.Cells[rowIndex, 49].Value = productSalesDetail.Quantity;
                userSheet.Cells[rowIndex, 50].Value = productSalesDetail.TotalAmount;


                rowIndex++;
            }

            return rowIndex;
        }

        public static void PrepareTotalHeader(Worksheet userSheet)
        {
            // 合并A1:L1并设置标题
            userSheet.Range["A1", "L1"].Merge();
            userSheet.Range["A1"].Value2 = "客戶資料";

            // 合并并设置各列标题
            userSheet.Range["A2", "A3"].Merge();
            userSheet.Range["A2"].Value2 = "業務";
            userSheet.Range["B2", "B3"].Merge();
            userSheet.Range["B2"].Value2 = "地區";
            userSheet.Range["C2", "C3"].Merge();
            userSheet.Range["C2"].Value2 = "行業";
            userSheet.Range["D2", "D3"].Merge();
            userSheet.Range["D2"].Value2 = "產能/年";
            userSheet.Range["E2", "E3"].Merge();
            userSheet.Range["E2"].Value2 = "名稱";
            userSheet.Range["F2", "F3"].Merge();
            userSheet.Range["F2"].Value2 = "採購主管";
            userSheet.Range["G2", "G3"].Merge();
            userSheet.Range["G2"].Value2 = "電話";
            userSheet.Range["H2", "H3"].Merge();
            userSheet.Range["H2"].Value2 = "採購";
            userSheet.Range["I2", "I3"].Merge();
            userSheet.Range["I2"].Value2 = "電話";
            userSheet.Range["J2", "J3"].Merge();
            userSheet.Range["J2"].Value2 = "地址";
            userSheet.Range["K2", "K3"].Merge();
            userSheet.Range["K2"].Value2 = "產品";
            userSheet.Range["L2", "L3"].Merge();
            userSheet.Range["L2"].Value2 = "需求/月";

            // 计算起始列（L列后面，列号13）
            int startCol = 13;

            // 合并年度销售表标题
            userSheet.Range[userSheet.Cells[1, startCol], userSheet.Cells[1, startCol + 37]].Merge();
            userSheet.Cells[1, startCol].Value2 = "年度销售表";

            // 设置月份表头
            for (int i = 0; i < 12; i++)
            {
                int monthCol = startCol + i * 3;
                userSheet.Range[userSheet.Cells[2, monthCol], userSheet.Cells[2, monthCol + 2]].Merge();
                userSheet.Cells[2, monthCol].Value2 = $"{i + 1}月";
                userSheet.Cells[3, monthCol].Value2 = "單價";
                userSheet.Cells[3, monthCol + 1].Value2 = "數量";
                userSheet.Cells[3, monthCol + 2].Value2 = "金額";
            }

            // 合并Total表头
            userSheet.Range[userSheet.Cells[2, startCol + 36], userSheet.Cells[2, startCol + 37]].Merge();
            userSheet.Cells[2, startCol + 36].Value2 = "Total";
            userSheet.Cells[3, startCol + 36].Value2 = "總數量";
            userSheet.Cells[3, startCol + 37].Value2 = "總金額";

            // 设置所有已用单元格居中
            Range usedRange = userSheet.UsedRange;
            usedRange.HorizontalAlignment = XlHAlign.xlHAlignCenter;
        }


        private static Worksheet GenUserSalesDetailSheet(
                ImportContext context,
                ImportContext.GroupedSalesDetailModel groupedSalesDetail
            )
        {
            var app = context.Application;
            var salesName = groupedSalesDetail.SalesName ?? "UNKONW";
            string sheetName = $"JQ Total({salesName.ToUpper()})";
            Worksheet userSheet = CreateSheetIfNotExisted(app, sheetName);
            Range usedRange = userSheet.UsedRange;
            if (usedRange != null && usedRange.Cells.Count > 1)
            {
                usedRange.Clear();
            }

            return userSheet;
        }

        private static Worksheet CreateSheetIfNotExisted(Microsoft.Office.Interop.Excel.Application app, string sheetName)
        {
            Worksheet userSheet = null;
            foreach (Worksheet item in app.Worksheets)
            {
                if (item.Name == sheetName)
                {
                    userSheet = item;
                    break;
                }
            };

            if (userSheet == null)
            {
                try
                {
                    // 新建工作表并命名
                    userSheet = app.Worksheets.Add();
                    userSheet.Name = sheetName;
                }
                catch
                {
                    throw new FormatException("创建或获取用户工作表失败，请检查是否存在同名工作表。");
                }
            }

            return userSheet;
        }

        private static void ReadSalesDetails(ImportContext context)
        {
            var dataRange = context.ImportWorkbook.Sheets[1].UsedRange;
            IList<SalesDetail> salesDatailList = new List<SalesDetail>();

            if (dataRange.Value2 is object[,] rawSalesDetailData)
            {
                int rowCount = rawSalesDetailData.GetLength(0);
                int colCount = rawSalesDetailData.GetLength(1);

                for (int i = 3; i <= rowCount; i++)
                {
                    SalesDetail item = new SalesDetail
                    {
                        SalesName = rawSalesDetailData[i, 1]?.ToString() ?? "UNKNOWN",
                        Month = rawSalesDetailData[i, 2]?.ToString() ?? "",
                        InvoiceDate = rawSalesDetailData[i, 3] is double invoiceDate ? DateTime.FromOADate(invoiceDate) : (DateTime?)null,
                        OrderNumber = rawSalesDetailData[i, 4]?.ToString() ?? "",
                        DeliveryDate = rawSalesDetailData[i, 5] is double deliveryDate ? DateTime.FromOADate(deliveryDate) : (DateTime?)null,
                        InvoiceNumber = rawSalesDetailData[i, 6]?.ToString() ?? "",
                        ClientName = rawSalesDetailData[i, 7]?.ToString() ?? "",
                        ProductNameEN = rawSalesDetailData[i, 8]?.ToString() ?? "",
                        Quantity = rawSalesDetailData[i, 9] != null ? Convert.ToDecimal(rawSalesDetailData[i, 9]) : (decimal?)null,
                        PriceWithTax = rawSalesDetailData[i, 10] != null ? Convert.ToDecimal(rawSalesDetailData[i, 10]) : (decimal?)null,
                        AmountWithoutTax = rawSalesDetailData[i, 11] != null ? Convert.ToDecimal(rawSalesDetailData[i, 11]) : (decimal?)null,
                        Tax = rawSalesDetailData[i, 12] != null ? Convert.ToDecimal(rawSalesDetailData[i, 12]) : (decimal?)null,
                        TotalAmount = rawSalesDetailData[i, 13] != null ? Convert.ToDecimal(rawSalesDetailData[i, 13]) : (decimal?)null,
                        Remark = rawSalesDetailData[i, 14]?.ToString() ?? "",
                    };
                    salesDatailList.Add(item);
                }
            }
            context.SalesDetails = salesDatailList;
        }

        public static Workbook SelectAndOpenExcelFile()
        {
            var app = Globals.ThisAddIn.Application;
            var curWorkbook = app.ActiveWorkbook;
            using (OpenFileDialog dialog = new OpenFileDialog())
            {
                dialog.Filter = "Excel 文件 (*.xlsx)|*.xlsx";
                dialog.Title = "请选择要打开的 Excel 文件";
                if (dialog.ShowDialog() == DialogResult.OK)
                {
                    string filePath = dialog.FileName;
                    Workbook workbook = app.Workbooks.Open(filePath);

                    curWorkbook.Activate();
                    return workbook;
                }
            }
            return null;
        }

        public static async void GenForecast(System.Windows.Forms.Button button)
        {
            String originLabel = button.Text;
            if (button != null)
            {
                button.Text = Resources.GENERATING;
            }

            var app = Globals.ThisAddIn.Application;
            var context = new GenForecaseContext
            {
                Application = app
            };
            try
            {
                // 获取「銷售年度預估」工作表
                ReadSalesForecastData(context);
                // 获取「產品年度預估」工作表
                ReadProductForecastData(context);

                GenBussenessSheet(context);
            }
            catch (Exception ex)
            {
                Console.WriteLine("Error generating forecast:" + ex.Message);
                MessageBox.Show("分析预估表失败: " + ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }

            button.Text = originLabel;
        }

        public static void GenBussenessSheet(GenForecaseContext context)
        {
            var app = context.Application;

            // 假设 app 是 Excel.Application
            Worksheet sheet = null;
            string sheetName = "業務月達成率";

            try
            {
                // 新增工作表
                sheet = app.Worksheets.Add();
                sheet.Name = sheetName;
            }
            catch
            {
                // 已存在则获取
                sheet = app.Worksheets[sheetName] as Worksheet;
                try
                {
                    Range usedRange = sheet.UsedRange;
                    if (usedRange != null && usedRange.Cells.Count > 1)
                    {
                        usedRange.Clear();
                    }
                }
                catch
                {
                    // 无 UsedRange 可忽略
                }
            }

            // 合并A1:A2并填入年份
            try
            {
                var monthData = context.MonthData;
                var yearValue = monthData[0];
                Range yearRange = sheet.Range["A1", "A2"];
                yearRange.Merge();
                yearRange.Value2 = yearValue.ToString();
                yearRange.NumberFormat = "@"; // 文本格式

                int startRowIndex = 1;
                // 填入月份
                for (int i = 0; i < 12; i++)
                {
                    int rowOffset = startRowIndex + 2;
                    sheet.Cells[i + rowOffset, 1] = $"{i + 1}月";
                }
                sheet.Cells[startRowIndex + 14, 1].value2 = "Total";

                // B列开始填 salesName 及相关数据
                int col = 2; // B列
                foreach (var salesForcastData in context.SalesForecastList)
                {
                    int rowIndex = startRowIndex; // Excel 行号从1开始
                    int startCol = col;
                    int endCol = col + 4;

                    // 合并并填入 salesName
                    Range salesNameRange = sheet.Range[
                        sheet.Cells[rowIndex, startCol],
                        sheet.Cells[rowIndex, startCol + 1]
                    ];
                    salesNameRange.Merge();
                    salesNameRange.Value2 = salesForcastData.Name;

                    // 合并并填入“完成%”
                    Range finishRange = sheet.Range[
                        sheet.Cells[rowIndex, startCol + 2],
                        sheet.Cells[rowIndex + 1, startCol + 2]
                    ];
                    finishRange.Merge();
                    finishRange.Value2 = "完成%";

                    // 合并并填入“累積達成率”
                    Range accRange = sheet.Range[
                        sheet.Cells[rowIndex, startCol + 3],
                        sheet.Cells[rowIndex + 1, startCol + 3]
                    ];
                    accRange.Merge();
                    accRange.Value2 = "累積達成率";

                    // 第二行填入 Y-forecast 和 turnover
                    rowIndex++;
                    sheet.Cells[rowIndex, startCol] = "Y-forecast";
                    sheet.Cells[rowIndex, startCol + 1] = "turnover";

                    // 填入每月数据
                    rowIndex++;
                    foreach (var forcastMonth in salesForcastData.MonthlyForecast)
                    {
                        var cell = sheet.Cells[rowIndex, startCol];
                        cell.Value2 = forcastMonth;
                        cell.NumberFormat = "#,##0";
                        rowIndex++;
                    }
                    var forecastColLetter = GetColumnLetter(col);
                    var turnoverColLetter = GetColumnLetter(col + 1);

                    sheet.Cells[rowIndex, col].formula = $"=SUM({forecastColLetter}{startRowIndex}:{forecastColLetter}{rowIndex - 1})";
                    sheet.Cells[rowIndex, col + 1].formula = $"=SUM({turnoverColLetter}{startRowIndex}:{turnoverColLetter}{rowIndex - 1})";

                    sheet.Cells[rowIndex, col + 2].formula = $"=SUM({turnoverColLetter}{rowIndex}/{forecastColLetter}{rowIndex})";
                    sheet.Cells[rowIndex, col + 2].NumberFormat = "0.00%";

                    col = endCol;
                }


                // 自适应所有已用列宽
                FormatSheetStyle(sheet);
            }
            catch (Exception ex)
            {
                MessageBox.Show("写入业绩月达成率时发生错误：" + ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }

        }


        private static void ReadClientContact(ImportContext context)
        {
            var app = context.Application;

            var clientContactSheet = app.Worksheets["客戶資料"] as Worksheet;
            var clientContactRange = clientContactSheet.UsedRange;
            IList<ClientContact> clientContactList = new List<ClientContact>();

            if (clientContactRange.Value2 is object[,] rawContactData)
            {
                int rowCount = rawContactData.GetLength(0);
                int colCount = rawContactData.GetLength(1);

                // 模板第二行开始是数据
                for (int i = 2; i <= rowCount; i++)
                {
                    var input = new ClientContact
                    {
                        Region = rawContactData[i, 1]?.ToString() ?? "",
                        Industry = rawContactData[i, 2]?.ToString() ?? "",
                        AnnualCapacity = rawContactData[i, 3]?.ToString() ?? "",
                        Name = rawContactData[i, 4]?.ToString() ?? "",
                        PurchasingManager = rawContactData[i, 5]?.ToString() ?? "",
                        PurchasingManagerPhone = rawContactData[i, 6]?.ToString() ?? "",
                        Purchaser = rawContactData[i, 7]?.ToString() ?? "",
                        PurchaserPhone = rawContactData[i, 8]?.ToString() ?? "",
                        Address = rawContactData[i, 9]?.ToString() ?? ""
                    };
                    clientContactList.Add(input);
                }
            }

            context.ClientContactList = clientContactList;
        }

        private static void ReadProductForecastData(GenForecaseContext context)
        {
            var app = context.Application;

            var productForecastSheet = app.Worksheets["產品年度預估"] as Worksheet;
            var productRange = productForecastSheet.UsedRange;
            IList<ProductForecastInput> productForecastList = new List<ProductForecastInput>();

            if (productRange.Value2 is object[,] rawProductData)
            {
                int rowCount = rawProductData.GetLength(0);
                int colCount = rawProductData.GetLength(1);
                if (rawProductData[1, 2] == null)
                {
                    throw new MissingMemberException("「產品年度預估」工作表的（年份）不能为空，请检查数据格式。");
                }
                var year = Convert.ToInt32(rawProductData[1, 2]);

                // 模板第三行开始是数据
                for (int i = 3; i <= rowCount; i++)
                {
                    var input = new ProductForecastInput
                    {
                        Year = year,
                        Name = rawProductData[i, 1]?.ToString() ?? "",
                        Quantity = rawProductData[i, 2] != null ? Convert.ToDecimal(rawProductData[i, 2]) : 0,
                        AmountTax = rawProductData[i, 3] != null ? Convert.ToDecimal(rawProductData[i, 3]) : 0,
                        Amount = rawProductData[i, 4] != null ? Convert.ToDecimal(rawProductData[i, 4]) : 0,
                        PriceAvg = rawProductData[i, 5] != null ? Convert.ToDecimal(rawProductData[i, 5]) : 0,
                    };
                    productForecastList.Add(input);
                }

            }

            context.ProductForecastList = productForecastList;
        }

        private static void ReadSalesForecastData(GenForecaseContext context)
        {
            var app = context.Application;

            var salesForecastSheet = app.Worksheets["銷售年度預估"] as Worksheet;
            var salesRange = salesForecastSheet.UsedRange;
            IList<SalesForecastInput> salesForecastInputList = new List<SalesForecastInput>();
            string[] monthData = new string[13];

            if (salesRange.Value2 is object[,] rawSalesData)
            {
                int rowCount = rawSalesData.GetLength(0);
                int colCount = rawSalesData.GetLength(1);
                if (rawSalesData[1, 2] == null)
                {
                    throw new MissingMemberException("「銷售年度預估」工作表的（年份）不能为空，请检查数据格式。");
                }
                var year = Convert.ToInt32(rawSalesData[1, 2]);
                monthData[0] = year.ToString();
                for (int i = 1; i <= 12; i++)
                {
                    monthData[i] = rawSalesData[2, i + 1].ToString();
                }

                // 模板第三行开始是数据
                for (int i = 3; i <= rowCount; i++)
                {
                    var input = new SalesForecastInput
                    {
                        Year = year,
                        Name = rawSalesData[i, 1]?.ToString() ?? "",
                        January = rawSalesData[i, 2] != null ? Convert.ToDecimal(rawSalesData[i, 2]) : 0,
                        February = rawSalesData[i, 3] != null ? Convert.ToDecimal(rawSalesData[i, 3]) : 0,
                        March = rawSalesData[i, 4] != null ? Convert.ToDecimal(rawSalesData[i, 4]) : 0,
                        April = rawSalesData[i, 5] != null ? Convert.ToDecimal(rawSalesData[i, 5]) : 0,
                        May = rawSalesData[i, 6] != null ? Convert.ToDecimal(rawSalesData[i, 6]) : 0,
                        June = rawSalesData[i, 7] != null ? Convert.ToDecimal(rawSalesData[i, 7]) : 0,
                        July = rawSalesData[i, 8] != null ? Convert.ToDecimal(rawSalesData[i, 8]) : 0,
                        August = rawSalesData[i, 9] != null ? Convert.ToDecimal(rawSalesData[i, 9]) : 0,
                        September = rawSalesData[i, 10] != null ? Convert.ToDecimal(rawSalesData[i, 10]) : 0,
                        October = rawSalesData[i, 11] != null ? Convert.ToDecimal(rawSalesData[i, 11]) : 0,
                        November = rawSalesData[i, 12] != null ? Convert.ToDecimal(rawSalesData[i, 12]) : 0,
                        December = rawSalesData[i, 13] != null ? Convert.ToDecimal(rawSalesData[i, 13]) : 0,
                        Total = rawSalesData[i, 14] != null ? Convert.ToDecimal(rawSalesData[i, 14]) : 0,
                    };
                    salesForecastInputList.Add(input);
                }
            }

            context.SalesForecastList = salesForecastInputList;
            context.MonthData = monthData;
        }
    }
}