using AcDream.App.World;
using Xunit;

namespace AcDream.App.Tests.World;

/// <summary>
/// The teleport-arrival readiness decision (#145/#138).
/// <list type="bullet">
///   <item>Unhydratable claim → place immediately via the caller's safety-net (Impossible).</item>
///   <item>Indoor (sealed dungeon / building interior) → hold until the EnvCell floor hydrates.</item>
///   <item>Outdoor → place IMMEDIATELY on the server-authoritative position. Holding is futile —
///         streaming does not progress while the player is held in PortalSpace, so the
///         destination can't stream in during a hold. The stale source landblock is dropped at
///         recenter (GameWindow.OnLivePositionUpdated), so the resolve falls through to the
///         server cell (Resolve NO-LANDBLOCK verbatim) until the destination streams in.</item>
/// </list>
/// </summary>
public class TeleportArrivalRulesTests
{
    [Fact]
    public void Unhydratable_IsImpossible()
    {
        Assert.Equal(ArrivalReadiness.Impossible,
            TeleportArrivalRules.Decide(claimUnhydratable: true, indoor: false, indoorCellReady: false));
        // …even for an indoor claim.
        Assert.Equal(ArrivalReadiness.Impossible,
            TeleportArrivalRules.Decide(claimUnhydratable: true, indoor: true, indoorCellReady: false));
    }

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

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

    [Fact]
    public void Outdoor_PlacesImmediately()
    {
        // #145: never hold an outdoor arrival — place at once on the server position. The
        // indoorCellReady flag is irrelevant for an outdoor destination.
        Assert.Equal(ArrivalReadiness.Ready,
            TeleportArrivalRules.Decide(claimUnhydratable: false, indoor: false, indoorCellReady: false));
    }
}