using PkmnLib.Dynamic.ScriptHandling;
using PkmnLib.Plugin.Gen7.Scripts.Moves;

namespace PkmnLib.Plugin.Gen7.Tests.Scripts.Moves;

/// <summary>
/// Tests for the <see cref="MoongeistBeam"/> move script.
/// Gen VII Bulbapedia behavior: "Moongeist Beam inflicts damage, ignoring all ignorable Abilities during the
/// execution of that move. (Ignorable Abilities are most Abilities that could potentially negatively affect
/// the success, damage, or effects of a move if possessed by the target of a move or its allies—such as
/// Multiscale and Friend Guard.)"
/// </summary>
public class MoongeistBeamTests
{
    /// <summary>
    /// Bulbapedia: "Moongeist Beam inflicts damage, ignoring all ignorable Abilities during the execution of
    /// that move." — when no categories are suppressed yet, the script creates the suppression list and adds
    /// the <see cref="ScriptCategory.Ability"/> category to it.
    /// </summary>
    [Test]
    public async Task OnBeforeAnyHookInvoked_NullList_CreatesListContainingAbilityCategory()
    {
        // Arrange
        var script = new MoongeistBeam();
        List<ScriptCategory>? suppressedCategories = null;

        // Act
        script.OnBeforeAnyHookInvoked(ref suppressedCategories);

        // Assert
        await Assert.That(suppressedCategories).IsNotNull();
        await Assert.That(suppressedCategories!.Contains(ScriptCategory.Ability)).IsTrue();
    }

    /// <summary>
    /// Bulbapedia: "ignoring all ignorable Abilities during the execution of that move" — when other script
    /// categories are already suppressed, the Ability category is added without removing the existing
    /// suppressions.
    /// </summary>
    [Test]
    public async Task OnBeforeAnyHookInvoked_ExistingList_AddsAbilityCategoryAndKeepsExistingEntries()
    {
        // Arrange
        var script = new MoongeistBeam();
        List<ScriptCategory>? suppressedCategories = [ScriptCategory.ItemBattleTrigger];

        // Act
        script.OnBeforeAnyHookInvoked(ref suppressedCategories);

        // Assert
        await Assert.That(suppressedCategories!.Contains(ScriptCategory.Ability)).IsTrue();
        await Assert.That(suppressedCategories!.Contains(ScriptCategory.ItemBattleTrigger)).IsTrue();
    }

    /// <summary>
    /// Bulbapedia: only "ignorable Abilities" are ignored — Moongeist Beam does not suppress any other kind
    /// of script (held items, status conditions, side effects, ...), so the script adds exactly the Ability
    /// category and nothing else.
    /// </summary>
    [Test]
    public async Task OnBeforeAnyHookInvoked_NullList_OnlySuppressesAbilityCategory()
    {
        // Arrange
        var script = new MoongeistBeam();
        List<ScriptCategory>? suppressedCategories = null;

        // Act
        script.OnBeforeAnyHookInvoked(ref suppressedCategories);

        // Assert
        await Assert.That(suppressedCategories!.Count).IsEqualTo(1);
        await Assert.That(suppressedCategories![0]).IsEqualTo(ScriptCategory.Ability);
    }
}