using AcDream.App.World;
using Xunit;

namespace AcDream.App.Tests.World;

/// <summary>
/// Full truth-table for TeleportArrivalRules.Decide after the §3.4 readiness-gate change.
/// </summary>
public class TeleportArrivalRulesTests
{
    [Fact]
    public void Unhydratable_IsImpossible_Outdoor()
    {
        Assert.Equal(ArrivalReadiness.Impossible,
            TeleportArrivalRules.Decide(
                claimUnhydratable: true, indoor: false,
                indoorCellReady: false, outdoorReady: false));
    }

    [Fact]
    public void Unhydratable_IsImpossible_Indoor()
    {
        Assert.Equal(ArrivalReadiness.Impossible,
            TeleportArrivalRules.Decide(
                claimUnhydratable: true, indoor: true,
                indoorCellReady: true, outdoorReady: false));
    }

    [Fact]
    public void Indoor_CellReady_IsReady()
    {
        Assert.Equal(ArrivalReadiness.Ready,
            TeleportArrivalRules.Decide(
                claimUnhydratable: false, indoor: true,
                indoorCellReady: true, outdoorReady: false));
    }

    [Fact]
    public void Indoor_CellNotReady_IsNotReady()
    {
        Assert.Equal(ArrivalReadiness.NotReady,
            TeleportArrivalRules.Decide(
                claimUnhydratable: false, indoor: true,
                indoorCellReady: false, outdoorReady: false));
    }

    [Fact]
    public void Outdoor_LandblockLoaded_IsReady()
    {
        Assert.Equal(ArrivalReadiness.Ready,
            TeleportArrivalRules.Decide(
                claimUnhydratable: false, indoor: false,
                indoorCellReady: false, outdoorReady: true));
    }

    [Fact]
    public void Outdoor_LandblockNotLoaded_IsNotReady()
    {
        // §3.4: the #145 residual — outdoor arrival on a not-yet-streamed landblock
        // must hold. Previously returned Ready immediately.
        Assert.Equal(ArrivalReadiness.NotReady,
            TeleportArrivalRules.Decide(
                claimUnhydratable: false, indoor: false,
                indoorCellReady: false, outdoorReady: false));
    }
}