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

namespace ytLive.Tests;

/// <summary>
/// Sync offsets ship at zero. A correction belongs to one camera on one desk, so a fresh profile must
/// not arrive with audio already shifted — a non-zero default would move every creator's voice to fix
/// one machine and would hide whether the fault is theirs or ours.
/// </summary>
public sealed class AudioSyncSettingsTests : IDisposable
{
    private readonly string _db = Path.Combine(Path.GetTempPath(), $"ytLlive-syncsettings-{Guid.NewGuid():N}.db");

    public void Dispose()
    {
        SqliteConnection.ClearAllPools();
        try { File.Delete(_db); } catch (IOException) { /* best effort */ }
    }

    [Fact]
    public void Both_offsets_start_at_zero_and_only_then_take_a_value()
    {
        using (var store = new LayoutStore(_db))
        {
            Assert.Equal(0, store.LoadMicSyncOffsetMs());          // opt-in, not pre-applied
            Assert.Equal(0, store.LoadAudioSyncOffsetMs());

            // A mic delay cannot be negative — advancing is the global offset's job.
            store.SaveMicSyncOffsetMs(-120);
            Assert.Equal(0, store.LoadMicSyncOffsetMs());

            store.SaveMicSyncOffsetMs(600);                        // beyond the slider's range
            Assert.Equal(500, store.LoadMicSyncOffsetMs());

            store.SaveMicSyncOffsetMs(240);
            store.SaveAudioSyncOffsetMs(-130);
        }

        using var reopened = new LayoutStore(_db);
        Assert.Equal(240, reopened.LoadMicSyncOffsetMs());
        Assert.Equal(-130, reopened.LoadAudioSyncOffsetMs());
    }
}