using AciTester.Models;
using OfficeOpenXml;
using System.ComponentModel;
using System.IO;
using System.Threading.Tasks;

namespace AciTester.Services
{
    public class ExcelReportService : IReportService
    {
        public async Task GenerateReportAsync(TestResult result, string filePath)
        {
            ExcelPackage.LicenseContext = OfficeOpenXml.LicenseContext.NonCommercial;
            using var package = new ExcelPackage();
            var sheet = package.Workbook.Worksheets.Add("ACI测试报告");

            // 标题
            sheet.Cells["A1"].Value = "中国药典2025版四部通则0951装置3测试报告";
            sheet.Cells["A1:C1"].Merge = true;
            sheet.Cells["A1"].Style.Font.Bold = true;
            sheet.Cells["A1"].Style.Font.Size = 16;

            // 基本信息
            sheet.Cells["A3"].Value = "测试时间:";
            sheet.Cells["B3"].Value = result.TestTime.ToString("yyyy-MM-dd HH:mm:ss");
            sheet.Cells["A4"].Value = "采样流量(L/min):";
            sheet.Cells["B4"].Value = result.FlowRate;
            sheet.Cells["A5"].Value = "总质量F(g):";
            sheet.Cells["B5"].Value = result.TotalMass;

            // 测试环境
            sheet.Cells["A6"].Value = "测试环境:";
            sheet.Cells["B6"].Value = $"流量: {result.FlowRate:F2} L/min, 温度: {result.Temperature:F1}℃, 压差: {result.DifferentialPressure:F2} kPa";

            // 微细粒子指标
            sheet.Cells["A7"].Value = "微细粒子剂量(FPD)";
            sheet.Cells["B7"].Value = $"{result.FineParticleDose:F2} mg";
            sheet.Cells["A8"].Value = "微细粒子分数(FPF)";
            sheet.Cells["B8"].Value = $"{result.FineParticleFraction:F2}%";

            // ============ 新增：粒径分布参数 ============
            sheet.Cells["A9"].Value = "粒径分布参数";
            sheet.Cells["A9"].Style.Font.Bold = true;

            sheet.Cells["A10"].Value = "D10 (μm)";
            sheet.Cells["B10"].Value = result.D10;
            sheet.Cells["A11"].Value = "D50 (μm) (MMAD)";
            sheet.Cells["B11"].Value = result.D50;
            sheet.Cells["A12"].Value = "D90 (μm)";
            sheet.Cells["B12"].Value = result.D90;
            sheet.Cells["A13"].Value = "GSD (几何标准偏差)";
            sheet.Cells["B13"].Value = result.GSD;

            // 各级数据表（起始行号调整为15）
            int dataStartRow = 15;
            sheet.Cells[dataStartRow, 1].Value = "层级";
            sheet.Cells[dataStartRow, 2].Value = "截止直径(μm)";
            sheet.Cells[dataStartRow, 3].Value = "净重(g)";
            sheet.Cells[dataStartRow, 4].Value = "占比(%)";
            sheet.Cells[dataStartRow, 1, dataStartRow, 4].Style.Font.Bold = true;

            int row = dataStartRow + 1;
            double total = result.TotalMass;
            foreach (var stage in result.Stages)
            {
                double percent = total > 0 ? stage.NetWeight / total * 100 : 0;
                sheet.Cells[row, 1].Value = stage.StageName;
                sheet.Cells[row, 2].Value = stage.CutoffDiameter > 0 ? stage.CutoffDiameter.ToString("F1") : "—";
                sheet.Cells[row, 3].Value = stage.NetWeight;
                sheet.Cells[row, 4].Value = percent.ToString("F2");
                row++;
            }

            sheet.Cells.AutoFitColumns();
            await package.SaveAsAsync(new FileInfo(filePath));
        }
    }
}