neon-sprawl/server/NeonSprawl.Server.Tests/Game/Combat/NpcAttackOperationsTests.cs

using Microsoft.Extensions.Options;
using NeonSprawl.Server.Game.AbilityInput;
using NeonSprawl.Server.Game.Combat;
using NeonSprawl.Server.Game.Npc;
using NeonSprawl.Server.Game.PositionState;
using NeonSprawl.Server.Tests.Game.Npc;
using Xunit;

namespace NeonSprawl.Server.Tests.Game.Combat;

public sealed class NpcAttackOperationsTests
{
    private static InMemoryPositionStateStore CreatePositionStoreAt(double x, double y, double z) =>
        new(Options.Create(new GamePositionOptions
        {
            DevPlayerId = "dev-local-1",
            DefaultPosition = new DefaultPositionOptions { X = x, Y = y, Z = z },
        }));

    [Fact]
    public void TryResolveTelegraphComplete_ShouldApplyCatalogDamage_WhenHolderMatchesAndInRange()
    {
        // Arrange
        var abilityRegistry = PrototypeNpcTestFixtures.CreateAbilityRegistry();
        var threatStore = new InMemoryThreatStateStore();
        var playerHealthStore = new InMemoryPlayerCombatHealthStore();
        var positionStore = CreatePositionStoreAt(-3.0, 0.5, -3.0);
        _ = threatStore.TrySetHolder(PrototypeNpcRegistry.PrototypeNpcMeleeId, "dev-local-1");
        // Act
        var ok = NpcAttackOperations.TryResolveTelegraphComplete(
            PrototypeNpcRegistry.PrototypeNpcMeleeId,
            "dev-local-1",
            PrototypeNpcAttackAbilityRegistry.PrototypeNpcMeleeStrike,
            abilityRegistry,
            positionStore,
            playerHealthStore,
            threatStore);
        // Assert
        Assert.True(ok);
        playerHealthStore.TryGet("dev-local-1", out var snapshot);
        Assert.Equal(85, snapshot.CurrentHp);
    }

    [Fact]
    public void TryResolveTelegraphComplete_ShouldNoOp_WhenHolderOutOfAbilityMaxRange()
    {
        // Arrange
        var abilityRegistry = PrototypeNpcTestFixtures.CreateAbilityRegistry();
        var threatStore = new InMemoryThreatStateStore();
        var playerHealthStore = new InMemoryPlayerCombatHealthStore();
        var positionStore = CreatePositionStoreAt(10.0, 0.5, 10.0);
        _ = threatStore.TrySetHolder(PrototypeNpcRegistry.PrototypeNpcMeleeId, "dev-local-1");
        // Act
        var ok = NpcAttackOperations.TryResolveTelegraphComplete(
            PrototypeNpcRegistry.PrototypeNpcMeleeId,
            "dev-local-1",
            PrototypeNpcAttackAbilityRegistry.PrototypeNpcMeleeStrike,
            abilityRegistry,
            positionStore,
            playerHealthStore,
            threatStore);
        // Assert
        Assert.False(ok);
        playerHealthStore.TryGet("dev-local-1", out var snapshot);
        Assert.Equal(PlayerCombatHealthDefaults.MaxHp, snapshot.CurrentHp);
    }

    [Fact]
    public void TryResolveTelegraphComplete_ShouldNoOp_WhenHolderBeyondAbilityMaxRangeButInsideAggroRadius()
    {
        // Arrange
        var abilityRegistry = PrototypeNpcTestFixtures.CreateAbilityRegistry();
        var threatStore = new InMemoryThreatStateStore();
        var playerHealthStore = new InMemoryPlayerCombatHealthStore();
        var positionStore = CreatePositionStoreAt(-10.0, 0.5, -3.0);
        _ = threatStore.TrySetHolder(PrototypeNpcRegistry.PrototypeNpcMeleeId, "dev-local-1");
        // Act
        var ok = NpcAttackOperations.TryResolveTelegraphComplete(
            PrototypeNpcRegistry.PrototypeNpcMeleeId,
            "dev-local-1",
            PrototypeNpcAttackAbilityRegistry.PrototypeNpcMeleeStrike,
            abilityRegistry,
            positionStore,
            playerHealthStore,
            threatStore);
        // Assert
        Assert.False(ok);
        playerHealthStore.TryGet("dev-local-1", out var snapshot);
        Assert.Equal(PlayerCombatHealthDefaults.MaxHp, snapshot.CurrentHp);
    }

    [Fact]
    public void TryResolveTelegraphComplete_ShouldNoOp_WhenHolderCleared()
    {
        // Arrange
        var abilityRegistry = PrototypeNpcTestFixtures.CreateAbilityRegistry();
        var threatStore = new InMemoryThreatStateStore();
        var playerHealthStore = new InMemoryPlayerCombatHealthStore();
        var positionStore = CreatePositionStoreAt(-3.0, 0.5, -3.0);
        _ = threatStore.TrySetHolder(PrototypeNpcRegistry.PrototypeNpcMeleeId, "dev-local-1");
        _ = threatStore.TryClearHolder(PrototypeNpcRegistry.PrototypeNpcMeleeId);
        // Act
        var ok = NpcAttackOperations.TryResolveTelegraphComplete(
            PrototypeNpcRegistry.PrototypeNpcMeleeId,
            "dev-local-1",
            PrototypeNpcAttackAbilityRegistry.PrototypeNpcMeleeStrike,
            abilityRegistry,
            positionStore,
            playerHealthStore,
            threatStore);
        // Assert
        Assert.False(ok);
        playerHealthStore.TryGet("dev-local-1", out var snapshot);
        Assert.Equal(PlayerCombatHealthDefaults.MaxHp, snapshot.CurrentHp);
    }

    [Fact]
    public void TryResolveTelegraphComplete_ShouldNoOp_WhenHolderPlayerDiffers()
    {
        // Arrange
        var abilityRegistry = PrototypeNpcTestFixtures.CreateAbilityRegistry();
        var threatStore = new InMemoryThreatStateStore();
        var playerHealthStore = new InMemoryPlayerCombatHealthStore();
        var positionStore = CreatePositionStoreAt(-3.0, 0.5, -3.0);
        _ = threatStore.TrySetHolder(PrototypeNpcRegistry.PrototypeNpcMeleeId, "other-player");
        // Act
        var ok = NpcAttackOperations.TryResolveTelegraphComplete(
            PrototypeNpcRegistry.PrototypeNpcMeleeId,
            "dev-local-1",
            PrototypeNpcAttackAbilityRegistry.PrototypeNpcMeleeStrike,
            abilityRegistry,
            positionStore,
            playerHealthStore,
            threatStore);
        // Assert
        Assert.False(ok);
        playerHealthStore.TryGet("dev-local-1", out var snapshot);
        Assert.Equal(PlayerCombatHealthDefaults.MaxHp, snapshot.CurrentHp);
    }

    [Fact]
    public void TryResolveTelegraphComplete_ShouldSucceedWithoutMutation_WhenAbilityBaseDamageZero()
    {
        // Arrange
        var abilityRegistry = PrototypeNpcTestFixtures.CreateAbilityRegistry();
        var threatStore = new InMemoryThreatStateStore();
        var playerHealthStore = new InMemoryPlayerCombatHealthStore();
        var positionStore = CreatePositionStoreAt(10.0, 0.5, 10.0);
        _ = threatStore.TrySetHolder(PrototypeNpcRegistry.PrototypeNpcMeleeId, "dev-local-1");
        // Act
        var ok = NpcAttackOperations.TryResolveTelegraphComplete(
            PrototypeNpcRegistry.PrototypeNpcMeleeId,
            "dev-local-1",
            PrototypeAbilityRegistry.PrototypeGuard,
            abilityRegistry,
            positionStore,
            playerHealthStore,
            threatStore);
        // Assert
        Assert.True(ok);
        playerHealthStore.TryGet("dev-local-1", out var snapshot);
        Assert.Equal(PlayerCombatHealthDefaults.MaxHp, snapshot.CurrentHp);
    }
}