using DocumentFormat.OpenXml.Packaging;
using Jiaowu.Api.Controllers;
using Jiaowu.Api.Infrastructure.Grades;
using Jiaowu.Api.Infrastructure.Pdf;
using SkiaSharp;

namespace Jiaowu.Api.Tests;

public sealed class GradeAnalysisWordReportGeneratorTests
{
    [Fact]
    public void ChineseTypefaceResolver_ProvidesChineseGlyphsForReportCharts()
    {
        using var typeface = PdfTypefaceResolver.ResolveChineseTypeface(null);
        using var font = new SKFont(typeface, 20);

        Assert.True(font.ContainsGlyphs("人数平均分合格率"));
    }

    [Fact]
    public void Generate_CreatesReadableDocxWithAnalysisSectionsAndCharts()
    {
        var now = new DateTime(2026, 8, 9, 10, 30, 0, DateTimeKind.Local);
        var summary = new GradeAnalyticsController.TeachingClassMetrics(
            10, 9, 2, 98m, 78.5m, 80m, 52m, 12.34m, 90m, 20m, now,
            [
                new("0–59", 0, 60, 1),
                new("60–69", 60, 70, 2),
                new("70–79", 70, 80, 2),
                new("80–89", 80, 90, 3),
                new("90–100", 90, null, 2)
            ]);
        var report = new GradeAnalyticsController.TeachingClassAnalysisReport(
            false, Guid.NewGuid(), Guid.NewGuid(), "TASK-01", "计算机一班",
            "CS101", "程序设计", "2026-2027 学年第一学期", summary,
            [new(Guid.NewGuid(), Guid.NewGuid(), "TASK-01", "计算机一班", "张老师", "计科一班", 10, 98m, 78.5m, 80m, 52m, 12.34m, 90m, 20m, true)],
            [new("全校", "全校同课程", 100, 100m, 76m, 45m, 88m)],
            [new(Guid.NewGuid(), "2026-2027 学年第一学期", 100, 76m, 88m, 18m, new(10, 78.5m, 90m, 20m))],
            new(2.5m, 2m, 76m, 88m));

        var bytes = GradeAnalysisWordReportGenerator.Generate(report, now, "测试校园综合服务平台");

        Assert.True(bytes.Length > 10_000);
        using var stream = new MemoryStream(bytes);
        using var document = WordprocessingDocument.Open(stream, false);
        var mainDocumentPart = document.MainDocumentPart
            ?? throw new InvalidOperationException("Generated document has no main document part.");
        var text = mainDocumentPart.Document?.InnerText
            ?? throw new InvalidOperationException("Generated document has no document body.");
        Assert.Contains("成绩分析报告", text);
        Assert.Contains("同课程教学班对比", text);
        Assert.Contains("各范围基准", text);
        Assert.Contains("历年成绩趋势", text);
        Assert.Contains("行政班组成", text);
        Assert.Contains("计科一班", text);
        Assert.Equal(3, mainDocumentPart.ImageParts.Count());
        Assert.Equal(2, mainDocumentPart.HeaderParts.Count());
        Assert.Equal(2, mainDocumentPart.FooterParts.Count());
    }

    [Fact]
    public void Generate_CourseOverallReport_CreatesReadableDocx()
    {
        var now = new DateTime(2026, 8, 21, 10, 30, 0, DateTimeKind.Local);
        var summary = new GradeAnalyticsController.CourseOverview(
            Guid.NewGuid(), "CS101", "程序设计", Guid.NewGuid(), "计算机学院", 2, 3,
            30, 26, 8, 99m, 78.5m, 52m, 86.67m, 26.67m, now);
        var report = new GradeAnalyticsController.CourseOverallAnalysisReport(
            summary,
            [new("0–59", 0, 60, 4), new("60–69", 60, 70, 6),
             new("70–79", 70, 80, 8), new("80–89", 80, 90, 7), new("90–100", 90, null, 5)],
            [new(Guid.NewGuid(), "2025-2026 学年第二学期", 1, 12, 76m, 83.33m, 25m),
             new(Guid.NewGuid(), "2026-2027 学年第一学期", 2, 18, 80.2m, 88.89m, 27.78m)],
            [new("计算机学院", 18, 80m, 88.89m, 27.78m), new("电子信息学院", 12, 76.3m, 83.33m, 25m)],
            [new(Guid.NewGuid(), Guid.NewGuid(), "2026-2027 学年第一学期", "TASK-01", "程序设计一班", "张老师", 18, 99m, 80.2m, 82m, 52m, 11.2m, 88.89m, 27.78m)]);

        var bytes = GradeAnalysisWordReportGenerator.Generate(report, now, "测试校园综合服务平台");

        Assert.True(bytes.Length > 8_000);
        using var stream = new MemoryStream(bytes);
        using var document = WordprocessingDocument.Open(stream, false);
        var mainDocumentPart = document.MainDocumentPart
            ?? throw new InvalidOperationException("Generated document has no main document part.");
        var text = mainDocumentPart.Document?.InnerText
            ?? throw new InvalidOperationException("Generated document has no document body.");
        Assert.Contains("科目总体成绩分析报告", text);
        Assert.Contains("学生来源学院对比", text);
        Assert.Contains("教学班横向比较", text);
        Assert.Single(mainDocumentPart.ImageParts);
    }
}