using System;
using System.IO;
using Microsoft.Data.Sqlite;
using Xunit;
using ytLive.Services;
using ytLive.ViewModels;

namespace ytLive.Tests;

/// <summary>
/// Record-OR-live (creator ruling 2026-09-01): the REC and ON-AIR pills are
/// radio-exclusive — arming one clears the other, so a session can never dual-encode
/// to both the YouTube ingest and a local file at once (a concurrent disk write
/// streamed from the same sustained Kbps cripples the stream on mid-range chassis).
/// The dual-block encoder machinery in FfmpegArgs stays generic; the constraint
/// lives at the pills.
/// </summary>
[Collection("RealApp")]
public sealed class PillRadioTests
{
    private readonly RealAppHost _app;

    public PillRadioTests(RealAppHost app) => _app = app;

    [Fact]
    public void Arming_One_Output_Pill_Clears_The_Other()
    {
        _app.Run(Run);
    }

    private void Run()
    {
        var tempDb = Path.Combine(Path.GetTempPath(), $"ytLlive-pillradio-{Guid.NewGuid():N}.db");
        MainViewModel.LayoutPathOverride = tempDb;
        try
        {
            using (var schema = new LayoutStore(tempDb)) { }
            SqliteConnection.ClearAllPools();

            var vm = new MainViewModel();
            vm.IsConnected = true; // the ON-AIR setter requires a sign-in

            // Arm REC first, then ON-AIR → REC must clear.
            vm.RecordPillOn = true;
            vm.OnAirPillOn = true;
            Assert.False(vm.RecordPillOn, "arming ON-AIR must clear the REC pill");
            Assert.True(vm.OnAirPillOn);

            // Arm REC while ON-AIR is lit → ON-AIR must clear.
            vm.RecordPillOn = true;
            Assert.False(vm.OnAirPillOn, "arming REC must clear the ON-AIR pill");
            Assert.True(vm.RecordPillOn);

            // A single armed pill still makes the Start button actionable.
            Assert.True(vm.CanStartSession);
        }
        finally
        {
            MainViewModel.LayoutPathOverride = null;
            SqliteConnection.ClearAllPools();
            try { File.Delete(tempDb); } catch { /* best-effort cleanup */ }
        }
    }
}