using NUnit.Framework;

namespace SVSim.UnitTests.BattleNode.Integration;

/// <summary>
/// Headless-Conductor milestone tests (M-HC-*). The oracle is a node-native battle:
/// a FIXED master seed + FIXED decks drive the engine's receive path headless, and we
/// assert on engine board-state. By construction the node assigns idx = position in the
/// shuffled order, so the engine's headless draw reproduces the node's draw order.
///
/// Task 1 (M-HC-0a) exit criterion: the engine seats headless (IsReady) in the
/// SVSim.UnitTests process.
/// </summary>
[TestFixture]
public class HeadlessConductorTests
{
    [Test]
    public void Harness_seats_engine_headless_and_is_ready()
    {
        using var harness = NodeNativeBattleHarness.Create();

        Assert.That(harness.IsReady, Is.True,
            "Engine must seat headless: EngineGlobalInit ran + both decks seeded. " +
            "If false, the most likely cause is a missing cards.json content link in " +
            "SVSim.UnitTests.csproj (EngineGlobalInit reads AppContext.BaseDirectory/Data/cards.json).");

        // Non-vacuous: a seated engine has live board state for BOTH seats. Reading these off a
        // not-really-set-up engine would throw (Seat() guards on _mgr). Leader life is the headless
        // default (20) before any frame is ingested.
        Assert.That(harness.LeaderLife(playerSeat: true), Is.EqualTo(20), "seat A leader life");
        Assert.That(harness.LeaderLife(playerSeat: false), Is.EqualTo(20), "seat B leader life");
    }
}