using NeonSprawl.Server.Game.PositionState;
using NeonSprawl.Server.Game.Targeting;
using Xunit;

namespace NeonSprawl.Server.Tests.Game.Targeting;

public class PlayerTargetStateReaderTests
{
    [Fact]
    public void ComputeValidity_ShouldReturnInvalidTarget_WhenLockIdNotInRegistry()
    {
        var snap = new PositionSnapshot(0, 0, 0, 0);
        Assert.Equal(TargetValidity.InvalidTarget, PlayerTargetStateReader.ComputeValidity("not_in_registry", in snap));
    }

    [Fact]
    public void ComputeValidity_ShouldReturnNone_WhenLockNull()
    {
        var snap = new PositionSnapshot(0, 0, 0, 0);
        Assert.Equal(TargetValidity.None, PlayerTargetStateReader.ComputeValidity(null, in snap));
    }

    [Fact]
    public void ComputeValidity_AtExactLockRadius_ReturnsOk()
    {
        // Alpha anchor XZ (-5, -5), lockRadius 8 → horizontal distance 8 from (3, -5) is on boundary (inclusive).
        var snap = new PositionSnapshot(3, 0, -5, 0);
        Assert.Equal(
            TargetValidity.Ok,
            PlayerTargetStateReader.ComputeValidity(PrototypeTargetRegistry.PrototypeTargetAlphaId, in snap));
    }

    [Fact]
    public void ComputeValidity_JustOutsideLockRadius_ReturnsOutOfRange()
    {
        const double eps = 1e-6;
        var snap = new PositionSnapshot(3 + eps, 0, -5, 0);
        Assert.Equal(
            TargetValidity.OutOfRange,
            PlayerTargetStateReader.ComputeValidity(PrototypeTargetRegistry.PrototypeTargetAlphaId, in snap));
    }
}