using System.IO;
using ClaudeDo.Localization;
using ClaudeDo.Ui.Localization;
using ClaudeDo.Ui.ViewModels.Modals;

namespace ClaudeDo.Ui.Tests.ViewModels;

public class DiffModalViewModelTests
{
    public DiffModalViewModelTests()
    {
        var dir = AppContext.BaseDirectory;
        while (dir is not null && !Directory.Exists(Path.Combine(dir, "src", "ClaudeDo.Localization", "locales")))
            dir = Path.GetDirectoryName(dir);
        Loc.Current = new Localizer(
            LocaleStore.Load(Path.Combine(dir!, "src", "ClaudeDo.Localization", "locales")), "en");
    }

    [Fact]
    public async Task LoadAsync_CommitRange_NullHeadCommit_ShowsUnavailableState()
    {
        var vm = new DiffModalViewModel(null!)
        {
            WorktreePath = "/some/repo",
            BaseRef = "abc123",
            HeadCommit = null,
            FromCommitRange = true,
        };

        await vm.LoadAsync();

        Assert.Empty(vm.Files);
        Assert.NotNull(vm.StatusMessage);
        Assert.Contains("no longer available", vm.StatusMessage, StringComparison.OrdinalIgnoreCase);
    }

    [Fact]
    public async Task LoadAsync_CommitRange_NullBaseRef_ShowsUnavailableState()
    {
        var vm = new DiffModalViewModel(null!)
        {
            WorktreePath = "/some/repo",
            BaseRef = null,
            HeadCommit = "def456",
            FromCommitRange = true,
        };

        await vm.LoadAsync();

        Assert.Empty(vm.Files);
        Assert.NotNull(vm.StatusMessage);
        Assert.Contains("no longer available", vm.StatusMessage, StringComparison.OrdinalIgnoreCase);
    }
}