using SSPCTester.Logic.Models;
using SSPCTester.Logic.Report;

namespace SSPCTester.Tests;

public sealed class ReportFileHelperTests
{
    [Fact]
    public void ResolveFileName_ExpandsVariablesAndKeepsPdfExtension()
    {
        var project = new Project
        {
            Name = "ProjectA",
            Dut =
            {
                ProductName = "SSPC",
                Model = "M24",
                SerialNumber = "SN001"
            },
            Report = { FileName = "{ProjectName}_{SerialNumber}_{yyyyMMdd_HHmmss}.pdf" }
        };

        string fileName = ReportFileHelper.ResolveFileName(project, new DateTime(2026, 6, 28, 9, 8, 7));

        Assert.Equal("ProjectA_SN001_20260628_090807.pdf", fileName);
    }

    [Fact]
    public void ResolveFileName_CanUseWordExtensionFromSameTemplate()
    {
        var project = new Project
        {
            Name = "ProjectA",
            Dut = { SerialNumber = "SN001" },
            Report = { FileName = "{ProjectName}_{SerialNumber}_{yyyyMMdd_HHmmss}.pdf" }
        };

        string fileName = ReportFileHelper.ResolveFileName(project, new DateTime(2026, 6, 28, 9, 8, 7), ".docx");

        Assert.Equal("ProjectA_SN001_20260628_090807.docx", fileName);
    }

    [Fact]
    public void ResolveFileName_CleansInvalidCharactersAndAddsPdfExtension()
    {
        var project = new Project
        {
            Name = "A:B/C",
            Report = { FileName = "{ProjectName}_{Date}" }
        };

        string fileName = ReportFileHelper.ResolveFileName(project, new DateTime(2026, 6, 28, 0, 0, 0));

        Assert.Equal("A_B_C_20260628.pdf", fileName);
    }

    [Fact]
    public void ResolveFileName_UsesFallbackForBlankTemplate()
    {
        var project = new Project { Report = { FileName = "   " } };

        string fileName = ReportFileHelper.ResolveFileName(project, new DateTime(2026, 6, 28, 1, 2, 3));

        Assert.Equal("report_20260628_010203.pdf", fileName);
    }

    [Theory]
    [InlineData("Pdf", ReportOutputFormat.Pdf)]
    [InlineData("word", ReportOutputFormat.Word)]
    [InlineData("BOTH", ReportOutputFormat.Both)]
    [InlineData("invalid", ReportOutputFormat.Pdf)]
    [InlineData(null, ReportOutputFormat.Pdf)]
    public void ParseFormat_HandlesKnownValuesAndFallsBackToPdf(string? value, ReportOutputFormat expected)
    {
        Assert.Equal(expected, ReportFileHelper.ParseFormat(value));
    }

    [Fact]
    public void EnumeratePdfFiles_SortsByLastWriteTimeDescending()
    {
        string folder = Path.Combine(Path.GetTempPath(), "SSPCTester-reports-" + Guid.NewGuid().ToString("N"));
        try
        {
            Directory.CreateDirectory(folder);
            string older = Path.Combine(folder, "older.pdf");
            string newer = Path.Combine(folder, "newer.pdf");
            string ignored = Path.Combine(folder, "ignored.txt");
            File.WriteAllText(older, "old");
            File.WriteAllText(newer, "new");
            File.WriteAllText(ignored, "txt");
            File.SetLastWriteTime(older, new DateTime(2026, 6, 27, 8, 0, 0));
            File.SetLastWriteTime(newer, new DateTime(2026, 6, 28, 8, 0, 0));

            var files = ReportFileHelper.EnumeratePdfFiles(folder);

            Assert.Equal(2, files.Count);
            Assert.Equal("newer.pdf", files[0].DisplayName);
            Assert.Equal("older.pdf", files[1].DisplayName);
        }
        finally
        {
            if (Directory.Exists(folder)) Directory.Delete(folder, true);
        }
    }

    [Fact]
    public void EnumerateReportFiles_BothIncludesPdfAndWord()
    {
        string folder = Path.Combine(Path.GetTempPath(), "SSPCTester-reports-" + Guid.NewGuid().ToString("N"));
        try
        {
            Directory.CreateDirectory(folder);
            string pdf = Path.Combine(folder, "a.pdf");
            string docx = Path.Combine(folder, "b.docx");
            File.WriteAllText(pdf, "pdf");
            File.WriteAllText(docx, "docx");

            var files = ReportFileHelper.EnumerateReportFiles(folder, ReportOutputFormat.Both);

            Assert.Contains(files, x => x.DisplayName == "a.pdf" && x.Kind == ReportFileKind.Pdf);
            Assert.Contains(files, x => x.DisplayName == "b.docx" && x.Kind == ReportFileKind.Word);
        }
        finally
        {
            if (Directory.Exists(folder)) Directory.Delete(folder, true);
        }
    }

    [Fact]
    public void ReportInfo_RoundTripsBesideReport()
    {
        string folder = Path.Combine(Path.GetTempPath(), "SSPCTester-reports-" + Guid.NewGuid().ToString("N"));
        try
        {
            Directory.CreateDirectory(folder);
            string report = Path.Combine(folder, "report.docx");
            File.WriteAllText(report, "");
            var info = new ReportInfo
            {
                ProjectName = "ProjectA",
                ProductName = "SSPC",
                GeneratedAt = new DateTime(2026, 6, 28, 12, 0, 0),
                Format = ReportOutputFormat.Word.ToString(),
                WordPath = report,
                OverallStatus = TestStatus.Pass.ToString()
            };

            ReportFileHelper.SaveInfo(info, ReportFileHelper.BuildInfoPath(report));
            var loaded = ReportFileHelper.LoadInfoForReport(report);

            Assert.NotNull(loaded);
            Assert.Equal("ProjectA", loaded.ProjectName);
            Assert.Equal(report, loaded.WordPath);
        }
        finally
        {
            if (Directory.Exists(folder)) Directory.Delete(folder, true);
        }
    }
}