using OneClickRun.Core.Logic;
using Xunit;

namespace OneClickRun.Core.Tests;

public class DoubleClickStateTests
{
    private static readonly TimeSpan Window = TimeSpan.FromMilliseconds(500);
    private static readonly DateTimeOffset T0 = new(2025, 1, 1, 0, 0, 0, TimeSpan.Zero);

    [Fact]
    public void FirstClick_IsPending()
    {
        var state = new DoubleClickState();
        Assert.Equal(DoubleClickOutcome.Pending, state.OnClick(2, T0, Window));
        Assert.Equal(2, state.PendingIndex);
    }

    [Fact]
    public void SecondClick_SameSector_WithinWindow_Executes()
    {
        var state = new DoubleClickState();
        state.OnClick(2, T0, Window);
        Assert.Equal(DoubleClickOutcome.Execute, state.OnClick(2, T0.AddMilliseconds(400), Window));
        Assert.Equal(-1, state.PendingIndex);
    }

    [Fact]
    public void SecondClick_AfterWindow_RestartsPending()
    {
        var state = new DoubleClickState();
        state.OnClick(2, T0, Window);
        Assert.Equal(DoubleClickOutcome.Pending, state.OnClick(2, T0.AddMilliseconds(600), Window));
        Assert.Equal(2, state.PendingIndex);
    }

    [Fact]
    public void SecondClick_DifferentSector_MovesPending()
    {
        var state = new DoubleClickState();
        state.OnClick(2, T0, Window);
        Assert.Equal(DoubleClickOutcome.Pending, state.OnClick(3, T0.AddMilliseconds(200), Window));
        Assert.Equal(3, state.PendingIndex);
        Assert.Equal(DoubleClickOutcome.Execute, state.OnClick(3, T0.AddMilliseconds(400), Window));
    }

    [Fact]
    public void Reset_ClearsPending()
    {
        var state = new DoubleClickState();
        state.OnClick(1, T0, Window);
        state.Reset();
        Assert.Equal(-1, state.PendingIndex);
        Assert.False(state.IsPending(T0.AddMilliseconds(1), Window));
    }
}