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

namespace ytLive.Tests;

/// <summary>
/// Three activities, always visible (creator, 2026-11-13): build, stream, record. The active one is lit
/// and runs its own flow in place; the other two stay on the bar and dim, so there is no state where the
/// creator cannot see where they are or how to step back.
/// </summary>
[Collection("MainViewModelLayoutPath")]
public class TopBarActivityTests
{
    private static MainViewModel NewVm(string db)
    {
        MainViewModel.LayoutPathOverride = db;
        return new MainViewModel();
    }

    [Fact]
    public void Three_activities_stay_on_the_bar_and_the_active_one_owns_its_flow()
    {
        var db = Path.Combine(Path.GetTempPath(), $"llamacasty-activity-{Guid.NewGuid():N}.db");
        try
        {
            var vm = NewVm(db);

            // Launch: Build is the activity and the only one editing.
            Assert.Equal(TopActivity.Build, vm.Activity);
            Assert.True(vm.IsBuildActivity);
            Assert.True(vm.IsEditMode);
            Assert.False(vm.IsRecording);

            // Record: its own flow becomes Start, and editing steps aside.
            vm.SelectRecordActivityCommand.Execute(null);
            Assert.True(vm.IsRecordActivity);
            Assert.False(vm.IsEditMode);
            Assert.True(vm.ShowRecordStart);
            Assert.False(vm.ShowRecordStop);
            Assert.Equal("Start Recording", vm.RecordActionLabel);

            // Recording swaps the flow to Stop, and the elapsed label carries REC.
            vm.IsRecording = true;
            Assert.False(vm.ShowRecordStart);
            Assert.True(vm.ShowRecordStop);
            Assert.Equal("Stop Recording", vm.RecordActionLabel);
            Assert.StartsWith("REC: ", vm.RecordElapsedLabel);
            vm.IsRecording = false;

            // YouTube: choosing Live only ARMS it. Start is a second press — the "are you ready?" moment.
            vm.SelectYouTubeActivityCommand.Execute(null);
            Assert.True(vm.IsYouTubeActivity);
            Assert.True(vm.ShowYouTubeModeChoices);
            Assert.False(vm.ShowYouTubeStart);

            vm.ChooseLiveModeCommand.Execute(null);
            Assert.True(vm.IsLiveModeChosen);
            Assert.False(vm.ShowYouTubeModeChoices);
            Assert.True(vm.ShowYouTubeStart);

            vm.ChoosePrivateModeCommand.Execute(null);
            Assert.True(vm.IsPrivateModeChosen);
            Assert.False(vm.IsLiveModeChosen);

            // Back to Build: editing returns, and the YouTube choice is forgotten, not carried.
            vm.SelectBuildActivityCommand.Execute(null);
            Assert.True(vm.IsBuildActivity);
            Assert.True(vm.IsEditMode);
            Assert.False(vm.ShowYouTubeModeChoices);
            Assert.False(vm.ShowYouTubeStart);
        }
        finally
        {
            MainViewModel.LayoutPathOverride = null;
            try { File.Delete(db); } catch (IOException) { }
        }
    }
}