using QuestPDF.Fluent;
using QuestPDF.Helpers;
using QuestPDF.Infrastructure;
using SSPCTester.Logic.Models;

namespace SSPCTester.Logic.Report;

/// <summary>
/// 用 QuestPDF 生成测试报告 PDF。按 Project.Report 勾选拼装章节。
/// </summary>
internal sealed class LegacyReportGenerator
{
    static LegacyReportGenerator()
    {
        QuestPDF.Settings.License = LicenseType.Community;
    }

    /// <summary>外部传入曲线图 PNG，键 = 通道号。</summary>
    public Dictionary<int, CurveReportImages> CurveImages { get; set; } = new();

    public void Generate(Project project, string outputPath)
    {
        Directory.CreateDirectory(Path.GetDirectoryName(outputPath)!);
        var sel = project.Report;
        Document.Create(container =>
        {
            container.Page(page =>
            {
                page.Size(PageSizes.A4);
                page.Margin(2, Unit.Centimetre);
                page.DefaultTextStyle(t => t.FontFamily("Microsoft YaHei").FontSize(10));

                page.Header().Element(h => Header(h, project));
                page.Content().Element(c => Content(c, project, sel));
                page.Footer().AlignCenter().Text(t =>
                {
                    t.Span("第 ");
                    t.CurrentPageNumber();
                    t.Span(" / ");
                    t.TotalPages();
                    t.Span(" 页");
                });
            });
        }).GeneratePdf(outputPath);
    }

    private static void Header(IContainer h, Project p)
    {
        h.Column(col =>
        {
            col.Item().Text($"固态功率控制器动态参数检测报告").FontSize(16).Bold();
            col.Item().Text($"项目：{p.Name}    生成时间：{DateTime.Now:yyyy-MM-dd HH:mm}").FontSize(9).FontColor(Colors.Grey.Darken2);
            col.Item().PaddingTop(4).LineHorizontal(0.5f).LineColor(Colors.Grey.Lighten2);
        });
    }

    private void Content(IContainer c, Project p, ReportSelection sel)
    {
        c.Column(col =>
        {
            col.Spacing(14);

            if (sel.Cover)
            {
                Section(col, "1. 被测件信息");
                col.Item().Element(e => DutTable(e, p));
                Section(col, "2. 测试信息");
                col.Item().Element(e => SiteTable(e, p));
                Section(col, "3. 综合判定");
                col.Item().Element(e => OverallBadge(e, p.OverallStatus));
            }

            if (sel.Basic && (p.BasicResults.Count > 0 || HasManualNote(p.TestFunction?.Basic)))
            {
                Section(col, "4. 基础测试结果（24 路）");
                if (p.BasicResults.Count > 0) col.Item().Element(e => BasicTable(e, p));
                ManualNote(col, p.TestFunction?.Basic);
            }

            if (sel.Curve && (p.CurveResults.Count > 0 || HasManualNote(p.TestFunction?.Curve)))
            {
                Section(col, "5. 开启与关断曲线（1.1–1.6）");
                if (p.CurveResults.Count > 0) col.Item().Element(e => CurveTable(e, p));
                ManualNote(col, p.TestFunction?.Curve);
                foreach (var (ch, images) in CurveImages.OrderBy(x => x.Key))
                {
                    AddCurveImage(col, ch, "ON", images.Rising);
                    AddCurveImage(col, ch, "OFF", images.Falling);
                }
            }

            if (sel.Power && (p.PowerResults.Count > 0 || HasManualNote(p.TestFunction?.Power)))
            {
                Section(col, "6. 功率损耗");
                if (p.PowerResults.Count > 0) col.Item().Element(e => PowerTable(e, p));
                ManualNote(col, p.TestFunction?.Power);
            }

            if (sel.Protect && (p.ProtectResults.Count > 0 || HasManualNote(p.TestFunction?.Protect)))
            {
                Section(col, "7. 保护功能（框架占位）");
                if (p.ProtectResults.Count > 0) col.Item().Element(e => ProtectTable(e, p));
                ManualNote(col, p.TestFunction?.Protect);
            }
        });
    }

    private static void Section(ColumnDescriptor col, string title)
    {
        col.Item().PaddingTop(6).Text(title).FontSize(13).Bold().FontColor(Colors.Blue.Darken2);
    }

    private static void AddCurveImage(ColumnDescriptor column, int channel, string phaseLabel, byte[]? png)
    {
        if (png == null || png.Length == 0) return;

        column.Item().PaddingTop(6).Text($"CH{channel:00} {phaseLabel} Curve").Bold();
        column.Item().Image(png).FitWidth();
    }

    private static bool HasManualNote(string? text) => !string.IsNullOrWhiteSpace(text);

    private static void ManualNote(ColumnDescriptor col, string? note)
    {
        if (!HasManualNote(note)) return;

        col.Item().PaddingTop(8).Text("测试说明").FontSize(11).Bold();
        col.Item()
            .Border(1)
            .BorderColor(Colors.Grey.Lighten2)
            .Background(Colors.Grey.Lighten4)
            .Padding(6)
            .Column(lines =>
            {
                foreach (var line in NormalizeLines(note!))
                    lines.Item().Text(string.IsNullOrEmpty(line) ? " " : line).FontSize(9);
            });
    }

    private static IEnumerable<string> NormalizeLines(string text)
        => text.Replace("\r\n", "\n").Replace('\r', '\n').Split('\n');

    private static void DutTable(IContainer c, Project p)
    {
        c.Table(t =>
        {
            t.ColumnsDefinition(cd => { cd.ConstantColumn(120); cd.RelativeColumn(); });
            Row(t, "设备编号", p.Dut.SerialNumber);
            Row(t, "设备名称", p.Dut.ProductName);
            Row(t, "设备型号", p.Dut.Model);           
            Row(t, "生产厂家", p.Dut.Manufacturer);
        });
    }

    private static void SiteTable(IContainer c, Project p)
    {
        c.Table(t =>
        {
            t.ColumnsDefinition(cd => { cd.ConstantColumn(120); cd.RelativeColumn(); });
            Row(t, "测试人员", p.Site.Tester);
            Row(t, "测试日期", p.Site.TestDate.ToString("yyyy-MM-dd"));
            Row(t, "环境", $"温度 {p.Site.TemperatureC}℃  湿度 {p.Site.HumidityPct}%  气压 {p.Site.PressureKpa}kPa");
            Row(t, "备注", p.Site.Remark);
        });
    }

    private static void Row(TableDescriptor t, string k, string? v)
    {
        t.Cell().Background(Colors.Grey.Lighten4).Padding(4).Text(k).SemiBold();
        t.Cell().Padding(4).Text(v ?? "");
    }

    private static void OverallBadge(IContainer c, TestStatus s)
    {
        (string text, string color) = s switch
        {
            TestStatus.Pass => ("综合判定：合格", Colors.Green.Darken1),
            TestStatus.Fail => ("综合判定：不合格", Colors.Red.Darken1),
            TestStatus.Running => ("综合判定：测试中", Colors.Blue.Darken1),
            TestStatus.Measured => ("综合判定：已测（无性能判据）", Colors.Blue.Darken1),
            _ => ("综合判定：未测试", Colors.Grey.Darken1),
        };
        c.Padding(6).Background(color).Padding(10).Text(text).FontColor(Colors.White).FontSize(14).Bold();
    }

    private static void BasicTable(IContainer c, Project p)
    {
        c.Table(t =>
        {
            t.ColumnsDefinition(cd =>
            {
                cd.ConstantColumn(60); cd.RelativeColumn(); cd.RelativeColumn(); cd.RelativeColumn(); cd.ConstantColumn(70);
            });
            HeaderRow(t, "通道", "电压(V)", "电流(A)", "关后电压(V)", "结果");
            foreach (var r in p.BasicResults)
            {
                t.Cell().Padding(3).Text($"CH{r.Channel}");
                t.Cell().Padding(3).Text(r.VoltageOn.ToString("F2"));
                t.Cell().Padding(3).Text(r.CurrentOn.ToString("F3"));
                t.Cell().Padding(3).Text(r.VoltageOff.ToString("F2"));
                t.Cell().Padding(3).Text(StatusText(r.Status)).FontColor(StatusColor(r.Status));
            }
        });
    }

    private static void CurveTable(IContainer c, Project p)
    {
        c.Table(t =>
        {
            t.ColumnsDefinition(cd =>
            {
                cd.ConstantColumn(50); cd.RelativeColumn(); cd.RelativeColumn(); cd.RelativeColumn(); cd.RelativeColumn(); cd.ConstantColumn(60);
            });
            HeaderRow(t, "通道", "开启(ms)", "上升(ms)", "关断(ms)", "下降(ms)", "结果");
            foreach (var r in p.CurveResults)
            {
                t.Cell().Padding(3).Text($"CH{r.Channel}");
                t.Cell().Padding(3).Text(FormatMs(r.OnTimeMs));
                t.Cell().Padding(3).Text(FormatMs(r.RiseTimeMs));
                t.Cell().Padding(3).Text(FormatMs(r.OffTimeMs));
                t.Cell().Padding(3).Text(FormatMs(r.FallTimeMs));
                t.Cell().Padding(3).Text(StatusText(r.Status)).FontColor(StatusColor(r.Status));
            }
        });
    }

    private static void PowerTable(IContainer c, Project p)
    {
        c.Table(t =>
        {
            t.ColumnsDefinition(cd =>
            {
                cd.ConstantColumn(50);
                cd.RelativeColumn(); cd.RelativeColumn(); cd.RelativeColumn();
                cd.RelativeColumn(); cd.RelativeColumn(); cd.RelativeColumn();
                cd.ConstantColumn(60);
            });
            HeaderRow(t, "通道", "Vin(V)", "Iin(A)", "Vout(V)", "Iout(A)", "损耗(W)", "效率(%)", "状态");
            foreach (var r in p.PowerResults)
            {
                t.Cell().Padding(3).Text($"CH{r.Channel}");
                t.Cell().Padding(3).Text(r.Vin.ToString("F3"));
                t.Cell().Padding(3).Text(r.Iin.ToString("F3"));
                t.Cell().Padding(3).Text(r.Vout.ToString("F3"));
                t.Cell().Padding(3).Text(r.Iout.ToString("F3"));
                t.Cell().Padding(3).Text(r.PowerLossW.ToString("F3"));
                t.Cell().Padding(3).Text(r.EfficiencyPct.ToString("F3"));
                t.Cell().Padding(3).Text(StatusText(r.Status)).FontColor(StatusColor(r.Status));
            }
        });
    }

    private static void ProtectTable(IContainer c, Project p)
    {
        c.Table(t =>
        {
            t.ColumnsDefinition(cd =>
            {
                cd.ConstantColumn(40);
                cd.RelativeColumn();
                cd.RelativeColumn();
                cd.RelativeColumn();
                cd.ConstantColumn(70);
                cd.ConstantColumn(60);
            });
            HeaderRow(t, "序号", "保护类型", "触发条件", "实测值", "判别模式", "判别结果");
            foreach (var r in p.ProtectResults)
            {
                t.Cell().Padding(3).Text(r.Index.ToString());
                t.Cell().Padding(3).Text(r.ProtectType);
                t.Cell().Padding(3).Text(r.Trigger);
                t.Cell().Padding(3).Text(r.MeasuredValue);
                t.Cell().Padding(3).Text(r.JudgeMode);
                t.Cell().Padding(3).Text(StatusText(r.Status)).FontColor(StatusColor(r.Status));
            }
        });
    }

    private static void HeaderRow(TableDescriptor t, params string[] cols)
    {
        foreach (var col in cols)
            t.Cell().Background(Colors.Grey.Lighten3).Padding(4).Text(col).SemiBold();
    }

    private static string FormatMs(double v) => double.IsNaN(v) ? "—" : v.ToString("F3");

    private static string StatusText(TestStatus s) => s switch
    {
        TestStatus.Pass => "合格",
        TestStatus.Fail => "不合格",
        TestStatus.Running => "测试中",
        TestStatus.Measured => "已测",
        _ => "未测试"
    };

    private static string StatusColor(TestStatus s) => s switch
    {
        TestStatus.Pass => Colors.Green.Darken1,
        TestStatus.Fail => Colors.Red.Darken1,
        TestStatus.Running => Colors.Blue.Darken1,
        TestStatus.Measured => Colors.Blue.Darken1,
        _ => Colors.Grey.Darken1
    };
}