using System;
using System.IO;
using ImageCatalog;
using ImageCatalog_2.Services;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Shouldly;

namespace MaddoShared.Tests;

[TestClass]
public class PickerPreferenceServiceTests
{
    [TestMethod]
    public void RememberValue_PersistsExactFilePath()
    {
        using var tempDirectory = new TemporaryDirectory();
        var preferencesFile = Path.Combine(tempDirectory.Path, "userprefs.xml");
        var service = new PickerPreferenceService(new ParametriSetup(preferencesFile));
        var settingsFile = Path.Combine(tempDirectory.Path, "nested", "settings.xml");

        service.RememberValue(PickerPreferenceKeys.LastSettingsFile, settingsFile);

        service.GetRememberedValue(PickerPreferenceKeys.LastSettingsFile).ShouldBe(settingsFile);
    }

    [TestMethod]
    public void ForgetValue_RemovesStoredPreference()
    {
        using var tempDirectory = new TemporaryDirectory();
        var preferencesFile = Path.Combine(tempDirectory.Path, "userprefs.xml");
        var service = new PickerPreferenceService(new ParametriSetup(preferencesFile));

        service.RememberValue(PickerPreferenceKeys.LastSettingsFile, Path.Combine(tempDirectory.Path, "settings.xml"));

        service.ForgetValue(PickerPreferenceKeys.LastSettingsFile);

        service.GetRememberedValue(PickerPreferenceKeys.LastSettingsFile).ShouldBeNull();
    }

    private sealed class TemporaryDirectory : IDisposable
    {
        public TemporaryDirectory()
        {
            Path = System.IO.Path.Combine(System.IO.Path.GetTempPath(), System.IO.Path.GetRandomFileName());
            Directory.CreateDirectory(Path);
        }

        public string Path { get; }

        public void Dispose()
        {
            if (Directory.Exists(Path))
            {
                Directory.Delete(Path, recursive: true);
            }
        }
    }
}