using PkmnLib.Dynamic.Libraries;
using PkmnLib.Dynamic.Models;
using PkmnLib.Dynamic.ScriptHandling;
using PkmnLib.Plugin.Gen7.Scripts.Battle;
using PkmnLib.Plugin.Gen7.Scripts.Moves;
using PkmnLib.Static;
using PkmnLib.Static.Libraries;
using PkmnLib.Static.Utils;

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

/// <summary>
/// Tests for the <see cref="Judgement"/> move.
/// </summary>
public class JudgementTests
{
    public record TestCaseData(string? ItemName, string ExpectedTypeName)
    {
        public override string ToString() => $"Judgement {ItemName ?? "None"} => {ExpectedTypeName}";
    }

    public static IEnumerable<Func<TestCaseData>> ChangeMoveTypeData()
    {
        yield return () => new TestCaseData("draco_plate", "dragon");
        yield return () => new TestCaseData("dread_plate", "dark");
        yield return () => new TestCaseData("earth_plate", "ground");
        yield return () => new TestCaseData("fist_plate", "fighting");
        yield return () => new TestCaseData("flame_plate", "fire");
        yield return () => new TestCaseData("icicle_plate", "ice");
        yield return () => new TestCaseData("insect_plate", "bug");
        yield return () => new TestCaseData("iron_plate", "steel");
        yield return () => new TestCaseData("meadow_plate", "grass");
        yield return () => new TestCaseData("mind_plate", "psychic");
        yield return () => new TestCaseData("pixie_plate", "fairy");
        yield return () => new TestCaseData("sky_plate", "flying");
        yield return () => new TestCaseData("splash_plate", "water");
        yield return () => new TestCaseData("spooky_plate", "ghost");
        yield return () => new TestCaseData("stone_plate", "rock");
        yield return () => new TestCaseData("toxic_plate", "poison");
        yield return () => new TestCaseData("zap_plate", "electric");
    }

    private static TypeLibrary CreateTypeLibrary()
    {
        var typeLibrary = new TypeLibrary();
        typeLibrary.RegisterType("normal");
        typeLibrary.RegisterType("fighting");
        typeLibrary.RegisterType("flying");
        typeLibrary.RegisterType("poison");
        typeLibrary.RegisterType("ground");
        typeLibrary.RegisterType("rock");
        typeLibrary.RegisterType("bug");
        typeLibrary.RegisterType("ghost");
        typeLibrary.RegisterType("steel");
        typeLibrary.RegisterType("fire");
        typeLibrary.RegisterType("water");
        typeLibrary.RegisterType("grass");
        typeLibrary.RegisterType("electric");
        typeLibrary.RegisterType("psychic");
        typeLibrary.RegisterType("ice");
        typeLibrary.RegisterType("dragon");
        typeLibrary.RegisterType("dark");
        typeLibrary.RegisterType("fairy");
        return typeLibrary;
    }

    private static (Judgement Script, IExecutingMove Move, IBattlePokemon Target) CreateTestSetup(string? itemName)
    {
        var move = Substitute.For<IExecutingMove>();
        var target = Substitute.For<IBattlePokemon>();
        var user = Substitute.For<IBattlePokemon>();
        var dynamicLibrary = Substitute.For<IDynamicLibrary>();
        var staticLibrary = Substitute.For<IStaticLibrary>();

        target.Library.Returns(dynamicLibrary);
        dynamicLibrary.StaticLibrary.Returns(staticLibrary);
        staticLibrary.Types.Returns(CreateTypeLibrary());
        move.User.Returns(user);

        if (itemName != null)
        {
            var item = Substitute.For<IItem>();
            item.Name.Returns(new StringKey(itemName));
            user.HeldItem.Returns(item);
        }
        else
        {
            user.HeldItem.Returns((IItem?)null);
        }

        return (new Judgement(), move, target);
    }

    /// <summary>
    /// Bulbapedia: "The type of Judgment depends on the type of Plate held by the user".
    /// </summary>
    [Test, MethodDataSource(nameof(ChangeMoveTypeData))]
    public async Task ChangeMoveType_UserHoldingPlate_ChangesMoveType(TestCaseData test)
    {
        // Arrange
        var (script, move, target) = CreateTestSetup(test.ItemName);
        TypeIdentifier? typeIdentifier = new TypeIdentifier(1, "normal");

        // Act
        script.ChangeMoveType(move, target, 0, ref typeIdentifier);

        // Assert
        await Assert.That(typeIdentifier!.Value.Name.ToString()).IsEqualTo(test.ExpectedTypeName);
    }

    /// <summary>
    /// Bulbapedia: "being Normal-type if there is no held Plate". Without a held item the move type
    /// is left unchanged.
    /// </summary>
    [Test]
    public async Task ChangeMoveType_UserNotHoldingItem_MoveTypeUnchanged()
    {
        // Arrange
        var (script, move, target) = CreateTestSetup(null);
        TypeIdentifier? typeIdentifier = new TypeIdentifier(1, "normal");

        // Act
        script.ChangeMoveType(move, target, 0, ref typeIdentifier);

        // Assert
        await Assert.That(typeIdentifier!.Value.Name.ToString()).IsEqualTo("normal");
    }

    /// <summary>
    /// Bulbapedia: "being Normal-type if there is no held Plate". A held item that is not a Plate
    /// leaves the move type unchanged.
    /// </summary>
    [Test]
    public async Task ChangeMoveType_UserHoldingNonPlateItem_MoveTypeUnchanged()
    {
        // Arrange
        var (script, move, target) = CreateTestSetup("oran_berry");
        TypeIdentifier? typeIdentifier = new TypeIdentifier(1, "normal");

        // Act
        script.ChangeMoveType(move, target, 0, ref typeIdentifier);

        // Assert
        await Assert.That(typeIdentifier!.Value.Name.ToString()).IsEqualTo("normal");
    }

    /// <summary>
    /// Bulbapedia: "Judgment's type is unaffected by Z-Crystals held by the user, remaining a
    /// Normal-type move."
    /// </summary>
    [Test]
    public async Task ChangeMoveType_UserHoldingZCrystal_MoveTypeRemainsNormal()
    {
        // Arrange
        var (script, move, target) = CreateTestSetup("firium_z");
        TypeIdentifier? typeIdentifier = new TypeIdentifier(1, "normal");

        // Act
        script.ChangeMoveType(move, target, 0, ref typeIdentifier);

        // Assert
        await Assert.That(typeIdentifier!.Value.Name.ToString()).IsEqualTo("normal");
    }

    /// <summary>
    /// Bulbapedia: "If Magic Room is in effect, Judgment's type will always be Normal regardless of
    /// the Plate held." With <see cref="MagicRoomEffect"/> on the battle, a held Plate must not
    /// change the move type.
    /// </summary>
    [Test]
    public async Task ChangeMoveType_MagicRoomInEffect_MoveTypeRemainsNormal()
    {
        // Arrange
        var (script, move, target) = CreateTestSetup("flame_plate");
        var battle = Substitute.For<IBattle>();
        battle.GetScripts().Returns(_ => new ScriptIterator(new List<IEnumerable<ScriptContainer>>()));
        var battleVolatile = new ScriptSet(battle);
        battleVolatile.Add(new MagicRoomEffect());
        battle.Volatile.Returns(battleVolatile);
        move.Battle.Returns(battle);
        TypeIdentifier? typeIdentifier = new TypeIdentifier(1, "normal");

        // Act
        script.ChangeMoveType(move, target, 0, ref typeIdentifier);

        // Assert
        await Assert.That(typeIdentifier!.Value.Name.ToString()).IsEqualTo("normal");
    }
}