using PkmnLib.Dynamic.Models;
using PkmnLib.Dynamic.ScriptHandling.Registry;
using PkmnLib.Plugin.Gen7.Scripts.Moves;
using PkmnLib.Plugin.Gen7.Scripts.Weather;
using PkmnLib.Static;
using PkmnLib.Static.Utils;

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

/// <summary>
/// Tests for the <see cref="Growth"/> move script.
/// Gen VII Bulbapedia behavior (Generation V onwards): "Growth now increases the user's Attack by one
/// stage in addition to increasing Special Attack by one stage. In harsh sunlight, Growth raises Attack
/// and Special Attack by two stages each."
/// </summary>
public class GrowthTests
{
    private static (Growth script, IExecutingMove move, IPokemon user, IBattle battle) CreateTestSetup(
        StringKey? weather = null)
    {
        var script = new Growth();
        var move = Substitute.For<IExecutingMove>();

        var battle = Substitute.For<IBattle>();
        battle.WeatherName.Returns(weather);
        move.Battle.Returns(battle);

        var user = Substitute.For<IPokemon>();
        move.User.Returns(user);

        return (script, move, user, battle);
    }

    /// <summary>
    /// Helper to extract the arguments of the received ChangeStatBoost call for the given statistic, or
    /// null when that stat was not boosted. Received-call inspection is used instead of NSubstitute
    /// argument matchers because the trailing EventBatchId parameter cannot be bound by <c>Arg.Any</c>.
    /// </summary>
    private static object?[]? GetStatBoostArgs(IPokemon pokemon, Statistic stat) =>
        pokemon.ReceivedCalls().Where(c => c.GetMethodInfo().Name == "ChangeStatBoost").Select(c => c.GetArguments())
            .FirstOrDefault(args => (Statistic)args[0]! == stat);

    /// <summary>
    /// Bulbapedia: "Growth now increases the user's Attack by one stage in addition to increasing Special
    /// Attack by one stage." The boosts are self-inflicted.
    /// </summary>
    [Test, Arguments(Statistic.Attack), Arguments(Statistic.SpecialAttack)]
    public async Task OnSecondaryEffect_NoWeather_StatRaisedByOneStage(Statistic stat)
    {
        // Arrange
        var (script, move, user, _) = CreateTestSetup();

        // Act
        script.OnSecondaryEffect(move, Substitute.For<IPokemon>(), 0);

        // Assert
        var args = GetStatBoostArgs(user, stat);
        await Assert.That(args).IsNotNull();
        await Assert.That((sbyte)args![1]!).IsEqualTo((sbyte)1);
        await Assert.That((bool)args[2]!).IsTrue(); // self-inflicted
        await Assert.That((bool)args[3]!).IsFalse(); // not forced
    }

    /// <summary>
    /// Bulbapedia: "In harsh sunlight, Growth raises Attack and Special Attack by two stages each."
    /// </summary>
    [Test, Arguments(Statistic.Attack), Arguments(Statistic.SpecialAttack)]
    public async Task OnSecondaryEffect_HarshSunlight_StatRaisedByTwoStages(Statistic stat)
    {
        // Arrange
        var (script, move, user, _) = CreateTestSetup(ScriptUtils.ResolveName<HarshSunlight>());

        // Act
        script.OnSecondaryEffect(move, Substitute.For<IPokemon>(), 0);

        // Assert
        var args = GetStatBoostArgs(user, stat);
        await Assert.That(args).IsNotNull();
        await Assert.That((sbyte)args![1]!).IsEqualTo((sbyte)2);
    }

    /// <summary>
    /// Bulbapedia: the doubled boost only applies "in harsh sunlight" — a different weather still raises
    /// the stats by only one stage.
    /// </summary>
    [Test]
    public async Task OnSecondaryEffect_OtherWeather_StatsRaisedByOneStage()
    {
        // Arrange
        var (script, move, user, _) = CreateTestSetup(new StringKey("rain"));

        // Act
        script.OnSecondaryEffect(move, Substitute.For<IPokemon>(), 0);

        // Assert
        var args = GetStatBoostArgs(user, Statistic.Attack);
        await Assert.That(args).IsNotNull();
        await Assert.That((sbyte)args![1]!).IsEqualTo((sbyte)1);
    }

    /// <summary>
    /// Bulbapedia: only Attack and Special Attack are raised — other stats stay untouched.
    /// </summary>
    [Test]
    public async Task OnSecondaryEffect_Always_OnlyAttackAndSpecialAttackRaised()
    {
        // Arrange
        var (script, move, user, _) = CreateTestSetup();

        // Act
        script.OnSecondaryEffect(move, Substitute.For<IPokemon>(), 0);

        // Assert
        await Assert.That(GetStatBoostArgs(user, Statistic.Defense)).IsNull();
        await Assert.That(GetStatBoostArgs(user, Statistic.SpecialDefense)).IsNull();
        await Assert.That(GetStatBoostArgs(user, Statistic.Speed)).IsNull();
    }
}