using LehrerApp.Desktop.Services;
using Xunit;

namespace LehrerApp.Desktop.Tests;

public sealed class WebUntisSettingsServiceTests
{
    private const string SampleUrl = "https://example.webuntis.com/WebUntis/ical_export?school=example&id=test&elemId=1&token=geheim";

    private static string BuildTempPath()
    {
        var path = Path.Combine(Path.GetTempPath(), $"lehrerapp-webuntissettingssvc-tests-{Guid.NewGuid():N}");
        Directory.CreateDirectory(path);
        return path;
    }

    [Fact]
    public void SetEnabled_PersistiertUeberNeueInstanz()
    {
        var path = BuildTempPath();
        new WebUntisSettingsService(path).SetEnabled(true);

        var reloaded = new WebUntisSettingsService(path);

        Assert.True(reloaded.Enabled);
    }

    [Fact]
    public void SetIcalUrl_IstVerschluesseltAbrufbar()
    {
        var service = new WebUntisSettingsService(BuildTempPath());

        service.SetIcalUrl(SampleUrl);

        Assert.True(service.IsConfigured);
        Assert.Equal(SampleUrl, service.GetIcalUrl());
    }

    [Fact]
    public void IcalUrl_UeberlebtNeueInstanzMitDemselbenPfad()
    {
        var path = BuildTempPath();
        new WebUntisSettingsService(path).SetIcalUrl(SampleUrl);

        var reloaded = new WebUntisSettingsService(path);

        Assert.True(reloaded.IsConfigured);
        Assert.Equal(SampleUrl, reloaded.GetIcalUrl());
    }

    [Fact]
    public void KonfigurationsdateiEnthaeltNichtDasTokenImKlartext()
    {
        var path = BuildTempPath();
        var service = new WebUntisSettingsService(path);
        service.SetIcalUrl(SampleUrl);

        var raw = File.ReadAllText(Path.Combine(path, "webuntis-settings.json"));

        Assert.DoesNotContain("token=geheim", raw);
    }

    [Fact]
    public void ClearIcalUrl_EntferntUrlUndDeaktiviert()
    {
        var service = new WebUntisSettingsService(BuildTempPath());
        service.SetIcalUrl(SampleUrl);
        service.SetEnabled(true);

        service.ClearIcalUrl();

        Assert.False(service.IsConfigured);
        Assert.Null(service.GetIcalUrl());
        Assert.False(service.Enabled);
    }

    [Fact]
    public void SetLastSync_PersistiertZeitstempelUndStatus()
    {
        var path = BuildTempPath();
        var at = new DateTime(2026, 8, 22, 12, 0, 0, DateTimeKind.Utc);
        new WebUntisSettingsService(path).SetLastSync(at, "3 Vertretungen erkannt");

        var reloaded = new WebUntisSettingsService(path);

        Assert.Equal(at, reloaded.LastSyncAt);
        Assert.Equal("3 Vertretungen erkannt", reloaded.LastSyncStatus);
    }

    [Fact]
    public void ApiCredentials_SindVerschluesseltUndPersistieren()
    {
        var path = BuildTempPath();
        var credentials = new WebUntisCredentials("schule", "mese.webuntis.com", "lehrkraft", "sehr geheim");
        var service = new WebUntisSettingsService(path);

        service.SetApiCredentials(credentials);
        service.SetTeacherUntisId(4711);

        var raw = File.ReadAllText(Path.Combine(path, "webuntis-settings.json"));
        var reloaded = new WebUntisSettingsService(path);
        Assert.DoesNotContain("sehr geheim", raw);
        Assert.True(reloaded.ApiIsConfigured);
        Assert.Equal(credentials, reloaded.GetApiCredentials());
        Assert.Equal(4711, reloaded.TeacherUntisId);
    }

    [Fact]
    public void ClearApiCredentials_LaesstIcalKonfigurationUnveraendert()
    {
        var service = new WebUntisSettingsService(BuildTempPath());
        service.SetIcalUrl(SampleUrl);
        service.SetApiCredentials(new("schule", "", "user", "password"));
        service.SetTeacherUntisId(12);

        service.ClearApiCredentials();

        Assert.False(service.ApiIsConfigured);
        Assert.Null(service.GetApiCredentials());
        Assert.Null(service.TeacherUntisId);
        Assert.True(service.IsConfigured);
        Assert.Equal(SampleUrl, service.GetIcalUrl());
    }
}