using ExperionCrawler.Core.Application.Feedforward;
using ExperionCrawler.Infrastructure.Control;
using Xunit;

namespace ExperionCrawler.Tests;

public class FeedforwardFrontTests
{
    [Fact]
    public void Front_stable_within_band()
    {
        var ind = new FrontPositionIndicator(bandwidth: 0.3);
        for (int i = 0; i < 50; i++) ind.Update(100.0, tsSec: 2, refTauSec: 60, strongSignal: true);
        var (state, trim, grade) = ind.Update(100.1, 2, 60, true);
        Assert.Contains("정상", state);
        Assert.Null(trim);
        Assert.Equal(Confidence.B, grade);
    }

    [Fact]
    public void Front_rise_triggers_reflux_advice()
    {
        var ind = new FrontPositionIndicator(bandwidth: 0.3);
        for (int i = 0; i < 200; i++) ind.Update(100.0, tsSec: 2, refTauSec: 60, strongSignal: false);
        var (state, trim, grade) = ind.Update(105.0, 2, 60, false);
        Assert.Contains("상승", state);
        Assert.Equal("환류↑ 권장", trim);
        Assert.Equal(Confidence.C, grade);
    }

    [Fact]
    public void Front_fall_triggers_boilup_advice()
    {
        var ind = new FrontPositionIndicator(bandwidth: 0.3);
        for (int i = 0; i < 200; i++) ind.Update(100.0, tsSec: 2, refTauSec: 60, strongSignal: true);
        var (state, trim, _) = ind.Update(95.0, 2, 60, true);
        Assert.Contains("하강", state);
        Assert.Contains("boilup", trim);
    }
}