using System;
using System.Threading.Tasks;
using ClaudeDo.Ui.Services;
using ClaudeDo.Ui.ViewModels;
using ClaudeDo.Ui.ViewModels.Conflicts;
using ClaudeDo.Ui.ViewModels.Modals;

namespace ClaudeDo.Ui.Tests;

// Covers the worker-menu "Shutdown" command: a confirm dialog gates the actual kill-worker +
// close-app action. ShutdownOperation is a test seam standing in for the real body, so these
// tests only assert the confirm gate, never a real process kill.
public class IslandsShellViewModelShutdownTests
{
    [Fact]
    public async Task Declined_DoesNotInvokeShutdownOperation()
    {
        var invoked = false;
        var vm = new IslandsShellViewModel
        {
            Dialogs = new FakeDialogService(confirmResult: false),
            ShutdownOperation = () => invoked = true,
        };

        await vm.ShutdownCommand.ExecuteAsync(null);

        Assert.False(invoked);
    }

    [Fact]
    public async Task Confirmed_InvokesShutdownOperation()
    {
        var invoked = false;
        var vm = new IslandsShellViewModel
        {
            Dialogs = new FakeDialogService(confirmResult: true),
            ShutdownOperation = () => invoked = true,
        };

        await vm.ShutdownCommand.ExecuteAsync(null);

        Assert.True(invoked);
    }

    private sealed class FakeDialogService(bool confirmResult) : IDialogService
    {
        public Task<bool> ConfirmAsync(string message) => Task.FromResult(confirmResult);

        public Task ShowAboutAsync(AboutModalViewModel vm) => throw new NotImplementedException();
        public Task ShowWeeklyReportAsync(WeeklyReportModalViewModel vm) => throw new NotImplementedException();
        public Task ShowUsageMonitorAsync(UsageMonitorModalViewModel vm) => throw new NotImplementedException();
        public Task ShowSettingsAsync(SettingsModalViewModel vm) => throw new NotImplementedException();
        public Task ShowListSettingsAsync(ListSettingsModalViewModel vm) => throw new NotImplementedException();
        public Task ShowRepoImportAsync(RepoImportModalViewModel vm) => throw new NotImplementedException();
        public Task ShowWorktreesOverviewAsync(WorktreesOverviewModalViewModel vm) => throw new NotImplementedException();
        public Task<IReadOnlyList<string>?> ShowMergeHelperSelectionAsync(MergeHelperSelectionModalViewModel vm) => throw new NotImplementedException();
        public Task ShowWorkerConnectionAsync(WorkerConnectionModalViewModel vm) => throw new NotImplementedException();
        public Task ShowConflictResolverAsync(ConflictResolverViewModel vm) => throw new NotImplementedException();
        public Task ShowLogVisualizerAsync(LogVisualizerViewModel vm) => throw new NotImplementedException();
        public Task ShowErrorAsync(string message) => Task.CompletedTask;
        public void ShowMissionControl(MissionControlViewModel vm) => throw new NotImplementedException();
        public void ShowCheatSheets(CheatSheetsViewModel vm) => throw new NotImplementedException();
    }
}