using System;
using System.IO;
using Xunit;
using ytLive.ViewModels;

namespace ytLive.Tests;

/// <summary>
/// The bar is three FIXED SLOTS (creator, 2026-11-13). Each slot owns its own flow and mutates only its
/// own interior, so neighbouring buttons never move; and while either action slot is past Idle, Build
/// Scenes is locked.
/// </summary>
[Collection("MainViewModelLayoutPath")]
public class TopBarSlotTests
{
    [Fact]
    public void Each_slot_runs_its_own_flow_in_place_and_build_locks_while_they_do()
    {
        var db = Path.Combine(Path.GetTempPath(), $"llamacasty-slots-{Guid.NewGuid():N}.db");
        MainViewModel.LayoutPathOverride = db;
        try
        {
            var vm = new MainViewModel();

            // All three idle: YouTube and Record are single buttons, Build is live.
            Assert.True(vm.IsYouTubeIdle);
            Assert.True(vm.IsRecordIdle);
            Assert.True(vm.IsBuildScenesEnabled);
            Assert.Contains("Edit layers", vm.BuildScenesTooltip);

            // YouTube: idle -> choose privacy -> armed -> (start) streaming.
            vm.OpenYouTubeCommand.Execute(null);
            Assert.True(vm.IsYouTubeChoosingPrivacy);
            Assert.False(vm.IsBuildScenesEnabled);
            Assert.Contains("locked", vm.BuildScenesTooltip);

            vm.ChoosePrivateCommand.Execute(null);
            Assert.True(vm.IsYouTubeArmed);
            Assert.Equal("Start Private", vm.YouTubeArmLabel);

            vm.ChooseLiveCommand.Execute(null);          // switching choice while armed is allowed
            Assert.Equal("Start Live", vm.YouTubeArmLabel);

            // Cancel returns that slot to Idle — and Build unlocks because both slots are idle again.
            vm.CancelYouTubeCommand.Execute(null);
            Assert.True(vm.IsYouTubeIdle);
            Assert.True(vm.IsBuildScenesEnabled);

            // Record: idle -> armed -> (start) recording, with the clock carrying REC.
            vm.OpenRecordCommand.Execute(null);
            Assert.True(vm.IsRecordArmed);
            Assert.False(vm.IsBuildScenesEnabled);

            vm.StartRecordingCommand.Execute(null);
            Assert.True(vm.IsRecordRecording);
            Assert.StartsWith("REC: ", vm.RecordElapsedLabel);

            vm.StopRecordingCommand.Execute(null);
            Assert.True(vm.IsRecordIdle);
            Assert.True(vm.IsBuildScenesEnabled);
        }
        finally
        {
            MainViewModel.LayoutPathOverride = null;
            try { File.Delete(db); } catch (IOException) { }
        }
    }
}