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 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);
                // 获取「客户资料」工作表
                readClientContact(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

                // 填入月份
                for (int i = 1; i < monthData.Length; i++)
                {
                    sheet.Cells[i + 2, 1] = monthData[i];
                }

                // B列开始填 salesName 及相关数据
                int col = 2; // B列
                foreach (var salesForcastData in context.SalesForecastList)
                {
                    int rowIndex = 1; // 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, 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, 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++;
                    }

                    col = endCol;
                }

                // 自适应所有已用列宽
                Range usedRange2 = sheet.UsedRange;
                if (usedRange2 != null)
                {
                    usedRange2.Columns.AutoFit();
                }
            }
            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(GenForecaseContext 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;
        }
    }
}