using System.Diagnostics;
using System.Text.Json;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Wordprocessing;
using DocumentAutomation.Shared;
using DocxWorkbench.WordInterop;
using DocxWorkbench.OpenXml;
using Xunit.Sdk;

namespace DocumentAutomation.IntegrationTests;

public sealed class WordComIntegrationTests
{
    [Fact]
    public void IntegrationAssemblyIsAvailable() => Assert.True(typeof(WordComIntegrationTests).Assembly.GetName().Name is not null);

    [Fact]
    public void WordAvailability_DoesNotRequireOfficePia()
    {
        var names = typeof(WordDocumentService).Assembly.GetReferencedAssemblies().Select(x => x.Name).ToArray(); Assert.DoesNotContain(names, name => string.Equals(name, "office", StringComparison.OrdinalIgnoreCase) || string.Equals(name, "Microsoft.Office.Interop.Word", StringComparison.OrdinalIgnoreCase));
    }

    [Fact]
    public async Task Build_WithoutInsertionPoint_DoesNotStartWord()
    {
        var template = CreateDocx(false); var body = Path.Combine(Path.GetTempPath(), Guid.NewGuid() + ".txt"); File.WriteAllText(body, "text"); var before = ProcessIds(); try { using var service = new WordDocumentService(); await Assert.ThrowsAsync<WordAutomationException>(() => service.BuildDocumentAsync(new WordDocumentBuildRequest { TemplatePath = template, BodyPath = body, OutputDocxPath = Path.Combine(Path.GetTempPath(), Guid.NewGuid() + ".docx") }, null, CancellationToken.None)); Assert.Empty(ProcessIds().Except(before)); } finally { File.Delete(template); File.Delete(body); }
    }

    [Fact] public async Task Build_RunsOnStaThread() { await RequireWord(); var result = await BuildTxt(); var log = JsonSerializer.Deserialize<JsonElement>(File.ReadAllText(result.LogPath)); Assert.Equal("STA", log.GetProperty("staApartment").GetString()); }
    [Fact] public async Task Build_WithTxtBody_InsertsText() { await RequireWord(); var result = await BuildTxt(); Assert.Contains("TXT integration body", ReadMainText(result.OutputDocxPath)); }
    [Fact] public async Task Build_WithDocxBody_InsertsDocument() { await RequireWord(); var template = CreateDocx(true); var body = CreateDocx(false, "DOCX integration body"); var output = Path.Combine(Path.GetTempPath(), Guid.NewGuid() + ".docx"); try { using var service = new WordDocumentService(); await service.BuildDocumentAsync(new WordDocumentBuildRequest { TemplatePath = template, BodyPath = body, OutputDocxPath = output }, null, CancellationToken.None); Assert.Contains("DOCX integration body", ReadMainText(output)); } finally { File.Delete(template); File.Delete(body); File.Delete(output); } }
    [Fact] public async Task Build_ExportsPdf() { await RequireWord(); var result = await BuildTxt(); using var service = new WordDocumentService(); var pdf = await service.ExportPdfAsync(result.OutputDocxPath, Path.ChangeExtension(result.OutputDocxPath, ".pdf"), CancellationToken.None); Assert.True(File.Exists(pdf.PdfPath)); File.Delete(result.OutputDocxPath); File.Delete(pdf.PdfPath); File.Delete(result.LogPath); }
    [Fact] public async Task Build_DoesNotLeaveCreatedWinwordProcess() { await RequireWord(); var before = ProcessIds(); var result = await BuildTxt(); await Task.Delay(500); Assert.Empty(ProcessIds().Except(before)); File.Delete(result.OutputDocxPath); File.Delete(result.LogPath); }
    [Fact] public async Task Build_Failure_ReleasesWord() { await RequireWord(); var before = ProcessIds(); var template = CreateDocx(true); var body = Path.Combine(Path.GetTempPath(), Guid.NewGuid() + ".txt"); var outputDirectory = Path.Combine(Path.GetTempPath(), Guid.NewGuid() + ".docx"); Directory.CreateDirectory(outputDirectory); File.WriteAllText(body, "failure body"); try { using var service = new WordDocumentService(); await Assert.ThrowsAnyAsync<Exception>(() => service.BuildDocumentAsync(new WordDocumentBuildRequest { TemplatePath = template, BodyPath = body, OutputDocxPath = outputDirectory }, null, CancellationToken.None)); await Task.Delay(500); Assert.Empty(ProcessIds().Except(before)); } finally { File.Delete(template); File.Delete(body); Directory.Delete(outputDirectory, true); } }
    [Fact]
    public async Task RuntimeGate_DesktopDocxBodyUsesTemplateCopy()
    {
        await RequireWord(); var template = @"C:\Users\codex\Desktop\156-титул-ПД.docx"; var body = @"C:\Users\codex\Desktop\НХС-33-УК3-ОЗХ-13011-000-НК-ОД.docx"; if (!File.Exists(template) || !File.Exists(body)) throw SkipException.ForSkip("The supplied Desktop DOCX fixtures are not available."); var copy = Path.Combine(Path.GetTempPath(), Guid.NewGuid() + ".docx"); var output = Path.Combine(Path.GetTempPath(), Guid.NewGuid() + ".docx"); File.Copy(template, copy); try { using (var document = WordprocessingDocument.Open(copy, true)) { var main = document.MainDocumentPart ?? throw new InvalidDataException("Main part missing."); main.Document.Body!.Append(new Paragraph(new Run(new Text("{{DOC_BODY}}")))); main.Document.Save(); } using var service = new WordDocumentService(); var result = await service.BuildDocumentAsync(new WordDocumentBuildRequest { TemplatePath = copy, BodyPath = body, OutputDocxPath = output }, null, CancellationToken.None); Assert.True(File.Exists(result.OutputDocxPath)); } finally { File.Delete(copy); File.Delete(output); File.Delete(Path.ChangeExtension(output, ".generation.json")); }
    }
    [Fact]
    public async Task ImportDocxBody_ExcludesSourceHeaders()
    {
    await RequireWord(); var template = CreateDocx(true); var source = CreateComplexSource(); var output = Path.Combine(Path.GetTempPath(), Guid.NewGuid() + ".docx"); var sourceHash = Convert.ToHexString(System.Security.Cryptography.SHA256.HashData(File.ReadAllBytes(source))); try { using var service = new WordDocumentService(); var result = await service.BuildDocumentAsync(new WordDocumentBuildRequest { TemplatePath = template, BodyPath = source, OutputDocxPath = output }, null, CancellationToken.None); using var document = WordprocessingDocument.Open(result.OutputDocxPath, false); var main = document.MainDocumentPart!; Assert.DoesNotContain(main.HeaderParts.SelectMany(x => x.Header?.Descendants<Text>() ?? []), x => x.Text == "SOURCE HEADER"); Assert.DoesNotContain(main.FooterParts.SelectMany(x => x.Footer?.Descendants<Text>() ?? []), x => x.Text == "SOURCE FOOTER"); Assert.Single(main.Document.Descendants<SectionProperties>()); Assert.NotNull(result.BodyImport); Assert.Contains("wdMainTextStory", result.BodyImport!.Plan.IncludedStories); Assert.Equal(sourceHash, Convert.ToHexString(System.Security.Cryptography.SHA256.HashData(File.ReadAllBytes(source)))); } finally { File.Delete(template); File.Delete(source); File.Delete(output); File.Delete(Path.ChangeExtension(output, ".generation.json")); }
    }
    [Fact]
    public async Task ImportDocxBody_DoesNotChangeDestinationPageSetup()
    {
        await RequireWord(); var template = CreateDocx(true); var source = CreateComplexSource(); var output = Path.Combine(Path.GetTempPath(), Guid.NewGuid() + ".docx"); try { using var service = new WordDocumentService(); var result = await service.BuildDocumentAsync(new WordDocumentBuildRequest { TemplatePath = template, BodyPath = source, OutputDocxPath = output }, null, CancellationToken.None); using var document = WordprocessingDocument.Open(result.OutputDocxPath, false); Assert.Single(document.MainDocumentPart!.Document.Descendants<SectionProperties>()); Assert.Contains("DOCX complex body", document.MainDocumentPart.Document.InnerText); } finally { File.Delete(template); File.Delete(source); File.Delete(output); File.Delete(Path.ChangeExtension(output, ".generation.json")); }
    }

    [Fact]
    public async Task TemplateLearning_EndToEnd_RealDocToDtemplateToDocxAndPdf()
    {
        await RequireWord(); var source = @"C:\Users\codex\Desktop\НХС-33-УК3-ОЗХ-13011-000-НК-ОД.doc"; var content = @"C:\Users\codex\Desktop\НХС-33-УК3-ОЗХ-13011-000-НК-ОД.docx"; if (!File.Exists(source) || !File.Exists(content)) throw SkipException.ForSkip("The supplied real DOC/DOCX fixtures are not available.");
        var package = Path.Combine(Path.GetTempPath(), Guid.NewGuid() + ".dtemplate"); var output = Path.Combine(Path.GetTempPath(), Guid.NewGuid() + ".docx"); var sourceHash = Convert.ToHexString(System.Security.Cryptography.SHA256.HashData(File.ReadAllBytes(source))); var before = ProcessIds();
        try
        {
            using var normalizer = new WordDocumentNormalizer(); var learning = new TemplateLearningService(normalizer, new TemplatePackageStore(), new OpenXmlDocumentInspector()); var learned = await learning.LearnAsync(new TemplateLearningRequest { SourcePath = source, TemplateName = "Real sample", OutputPackagePath = package }, null, CancellationToken.None); Assert.NotEmpty(learned.Slots); Assert.True(File.Exists(package)); using var generator = new TemplateDocumentGenerator(new TemplatePackageStore(), new WordDocumentNormalizer(), new OpenXmlDocumentInspector()); var result = await generator.GenerateAsync(new TemplateGenerationRequest { TemplatePackagePath = package, ContentSourcePath = content, OutputDocxPath = output }, null, CancellationToken.None); Assert.True(File.Exists(result.OutputDocxPath)); Assert.True(File.Exists(result.OutputPdfPath)); Assert.Equal(sourceHash, Convert.ToHexString(System.Security.Cryptography.SHA256.HashData(File.ReadAllBytes(source)))); Assert.Empty(ProcessIds().Except(before));
        }
        finally { File.Delete(package); File.Delete(output); File.Delete(Path.ChangeExtension(output, ".pdf")); File.Delete(Path.ChangeExtension(output, ".generation.json")); File.Delete(Path.ChangeExtension(output, ".validation.json")); }
    }

    private static async Task RequireWord() { if (!OperatingSystem.IsWindows() || Type.GetTypeFromProgID("Word.Application", false) is null) throw SkipException.ForSkip("Microsoft Word COM is not installed or registered on this workstation."); await Task.CompletedTask; }
    private static async Task<WordDocumentResult> BuildTxt() { var template = CreateDocx(true); var body = Path.Combine(Path.GetTempPath(), Guid.NewGuid() + ".txt"); var output = Path.Combine(Path.GetTempPath(), Guid.NewGuid() + ".docx"); File.WriteAllText(body, "TXT integration body"); try { using var service = new WordDocumentService(); return await service.BuildDocumentAsync(new WordDocumentBuildRequest { TemplatePath = template, BodyPath = body, OutputDocxPath = output }, null, CancellationToken.None); } finally { File.Delete(template); File.Delete(body); } }
    private static HashSet<int> ProcessIds() => Process.GetProcessesByName("WINWORD").Select(x => x.Id).ToHashSet();
    private static string ReadMainText(string path) { using var doc = WordprocessingDocument.Open(path, false); return doc.MainDocumentPart?.Document.InnerText ?? ""; }
    private static string CreateComplexSource()
    {
        var path = Path.Combine(Path.GetTempPath(), Guid.NewGuid() + ".docx"); using var doc = WordprocessingDocument.Create(path, DocumentFormat.OpenXml.WordprocessingDocumentType.Document); var main = doc.AddMainDocumentPart(); var header1 = main.AddNewPart<HeaderPart>(); header1.Header = new Header(new Paragraph(new Run(new Text("SOURCE HEADER")))); var footer1 = main.AddNewPart<FooterPart>(); footer1.Footer = new Footer(new Paragraph(new Run(new Text("SOURCE FOOTER")))); var body = new Body(); var first = new Paragraph(new ParagraphProperties(new SectionProperties(new HeaderReference { Type = HeaderFooterValues.Default, Id = main.GetIdOfPart(header1) }, new FooterReference { Type = HeaderFooterValues.Default, Id = main.GetIdOfPart(footer1) })), new Run(new Text("DOCX complex body"))); body.Append(first); body.Append(new Table(new TableRow(new TableCell(new Paragraph(new Run(new Text("source table"))))))); body.Append(new SectionProperties(new HeaderReference { Type = HeaderFooterValues.Default, Id = main.GetIdOfPart(header1) }, new FooterReference { Type = HeaderFooterValues.Default, Id = main.GetIdOfPart(footer1) })); main.Document = new Document(body); main.Document.Save(); return path;
    }
    private static string CreateDocx(bool marker, string text = "template body") { var path = Path.Combine(Path.GetTempPath(), Guid.NewGuid() + ".docx"); using var doc = WordprocessingDocument.Create(path, DocumentFormat.OpenXml.WordprocessingDocumentType.Document); var main = doc.AddMainDocumentPart(); main.Document = new Document(new Body(new Paragraph(new Run(new Text(marker ? "{{DOC_BODY}}" : text))))); main.Document.Save(); return path; }
}