using System.IO.Compression;
using LehrerApp.Templating;
using Xunit;

namespace LehrerApp.Templating.Tests;

public sealed class TemplateMetadataTests : IDisposable
{
    private readonly string _directory = Path.Combine(Path.GetTempPath(), $"template-metadata-{Guid.NewGuid():N}");

    public TemplateMetadataTests() => Directory.CreateDirectory(_directory);

    [Fact]
    public void Paket_SchreibtLesbareMetadatendateiUndLaedtWerteInsManifest()
    {
        var path = Path.Combine(_directory, "metadata.lavorlage");
        var manifest = new TemplateManifest
        {
            Id = "metadata", Name = "Metadaten",
            Metadata = new(StringComparer.OrdinalIgnoreCase)
            {
                ["language"] = "de-DE",
                ["report-type"] = "parent-letter",
                ["filter"] = "class=7a",
            },
        };

        TemplatePackage.Create(path, manifest, "PAGE 210 297 mm", new Dictionary<string, byte[]>());

        using (var archive = ZipFile.OpenRead(path))
        using (var reader = new StreamReader(archive.GetEntry("metadata.txt")!.Open()))
        {
            var text = reader.ReadToEnd();
            Assert.Contains("language=de-DE", text);
            Assert.Contains("report-type=parent-letter", text);
        }
        var loaded = new TemplateLoader().LoadFromPackage(path);
        Assert.Equal("de-DE", loaded.Manifest.Metadata["language"]);
        Assert.Equal("parent-letter", loaded.Manifest.Metadata["REPORT-TYPE"]);
        Assert.Equal("class=7a", loaded.Manifest.Metadata["filter"]);
        Assert.DoesNotContain("metadata.txt", loaded.Assets.Keys);
    }

    [Fact]
    public void Textformat_IgnoriertKommentareUndLehntDoppelteSchluesselAb()
    {
        var parsed = TemplateMetadataText.Parse("# Kommentar\nlanguage = de-DE\nreport-type=letter\n");
        Assert.Equal("de-DE", parsed["language"]);

        var exception = Assert.Throws<InvalidDataException>(() =>
            TemplateMetadataText.Parse("language=de-DE\nLANGUAGE=en-US"));
        Assert.Contains("mehrfach", exception.Message);
    }

    public void Dispose()
    {
        if (Directory.Exists(_directory)) Directory.Delete(_directory, true);
    }
}