using Decky.Core.Models;
using Decky.Core.Services;

namespace Decky.Core.Tests;

public sealed class JsonSettingsServiceTests : IDisposable
{
    private readonly string _testDirectory = Path.Combine(
        Path.GetTempPath(),
        $"Decky.Tests.{Guid.NewGuid():N}");

    [Fact]
    public async Task LoadAsync_returns_defaults_when_file_does_not_exist()
    {
        using var service = CreateService();

        var settings = await service.LoadAsync();

        Assert.Equal(30, settings.RefreshIntervalSeconds);
        Assert.Empty(settings.OpenBoardTabs);
    }

    [Fact]
    public async Task SaveAsync_round_trips_connection_and_board_settings()
    {
        using var service = CreateService();
        var expected = new AppSettings
        {
            ServerUrl = "https://cloud.example.test/",
            Username = "elijah",
            ApiPath = "index.php/apps/deck/api/v1.0/",
            OpenBoardTabs = [17],
            Boards = new Dictionary<int, BoardViewSettings>
            {
                [17] = new() { Orientation = BoardOrientation.Vertical },
            },
        };

        await service.SaveAsync(expected);
        var actual = await service.LoadAsync();

        Assert.Equal(expected.ServerUrl, actual.ServerUrl);
        Assert.Equal(expected.Username, actual.Username);
        Assert.Equal(expected.ApiPath, actual.ApiPath);
        Assert.Equal([17], actual.OpenBoardTabs);
        Assert.Equal(BoardOrientation.Vertical, actual.Boards[17].Orientation);
        Assert.DoesNotContain("password", await File.ReadAllTextAsync(GetSettingsPath()), StringComparison.OrdinalIgnoreCase);
    }

    [Fact]
    public async Task LoadAsync_preserves_corrupt_file_and_returns_defaults()
    {
        Directory.CreateDirectory(_testDirectory);
        await File.WriteAllTextAsync(GetSettingsPath(), "{ definitely not json }");
        using var service = CreateService();

        var settings = await service.LoadAsync();

        Assert.Equal(string.Empty, settings.ServerUrl);
        Assert.False(File.Exists(GetSettingsPath()));
        Assert.Single(Directory.GetFiles(_testDirectory, "settings.corrupt-*.json"));
    }

    private JsonSettingsService CreateService() => new(GetSettingsPath());

    private string GetSettingsPath() => Path.Combine(_testDirectory, "settings.json");

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