using System.Collections.Generic;
using NUnit.Framework;
using UnityEngine;
using YachtDice.Categories;
using YachtDice.Dice;
using YachtDice.Economy;
using YachtDice.Events;
using YachtDice.Modifiers.Core;
using YachtDice.Modifiers.Definition;
using YachtDice.Modifiers.Effects;
using YachtDice.Modifiers.Pipeline;
using YachtDice.Modifiers.Runtime;
using YachtDice.Scoring;

namespace YachtDice.Tests
{
    public class LimitedUseModifierFlowTests
    {
        private readonly List<Object> _createdAssets = new();

        private CategoryDefinition _onesCategory;
        private CategoryDefinition _twosCategory;
        private CategoryDefinition _chanceCategory;
        private DiceDefinition _standardDice;
        private CategoryCatalog _catalog;
        private CurrencyBank _currencyBank;
        private ModifierRegistry _registry;
        private ScoringSystem _scoringSystem;
        private ModifierInstance _instance;

        [SetUp]
        public void SetUp()
        {
            _standardDice = DiceDefinition.CreateForTest<StandardDice>("d6", "d6");
            _onesCategory = SumOfValueCategory.CreateForTest("ones", "Единицы", 1);
            _twosCategory = SumOfValueCategory.CreateForTest("twos", "Двойки", 2);
            _chanceCategory = SumAllCategory.CreateForTest("chance", "Шанс");
            _catalog = CategoryCatalog.CreateForTest(new List<CategoryDefinition>
            {
                _onesCategory,
                _twosCategory,
                _chanceCategory,
            });

            _createdAssets.Add(_standardDice);
            _createdAssets.Add(_onesCategory);
            _createdAssets.Add(_twosCategory);
            _createdAssets.Add(_chanceCategory);
            _createdAssets.Add(_catalog);

            var bankGo = new GameObject("CurrencyBank");
            _currencyBank = bankGo.AddComponent<CurrencyBank>();
            _currencyBank.SetBalance(100);

            _registry = new ModifierRegistry(5);
            var pipeline = new ModifierPipeline(_registry)
            {
                TracingEnabled = false,
            };

            var eventBus = new GameEventBus(pipeline);

            var scoringGo = new GameObject("ScoringSystem");
            _scoringSystem = scoringGo.AddComponent<ScoringSystem>();
            _scoringSystem.Construct(eventBus, _registry, _catalog, _currencyBank);

            var multiply = AddCreatedAsset(MultiplyScoreEffect.CreateForTest(2f, ModifierPhase.Multiplicative));
            var consume = AddCreatedAsset(ConsumeChargeEffect.CreateForTest(1, ModifierPhase.SideEffect));
            var behavior = AddCreatedAsset(ModifierBehavior.CreateForTest(
                TriggerType.OnCategoryScored,
                null,
                new List<Effect> { multiply, consume }));
            var definition = AddCreatedAsset(ModifierDefinition.CreateForTest(
                "mod_multiplier_2x_limited",
                new List<ModifierBehavior> { behavior },
                hasLimitedUses: true,
                maxUses: 3));

            _instance = _registry.Add(definition);
            _registry.TryActivate(_instance);
        }

        [TearDown]
        public void TearDown()
        {
            foreach (var scoring in Object.FindObjectsByType<ScoringSystem>(FindObjectsSortMode.None))
                Object.DestroyImmediate(scoring.gameObject);

            foreach (var bank in Object.FindObjectsByType<CurrencyBank>(FindObjectsSortMode.None))
                Object.DestroyImmediate(bank.gameObject);

            for (var i = 0; i < _createdAssets.Count; i++)
            {
                if (_createdAssets[i] != null)
                    Object.DestroyImmediate(_createdAssets[i]);
            }

            _createdAssets.Clear();
        }

        /// <summary>
        /// Предпросмотр очков не расходует заряды ограниченного модификатора.
        /// </summary>
        [Test]
        public void PreviewScore_DoesNotConsumeCharges()
        {
            _scoringSystem.PreviewScore(CreateDice(1, 1, 2, 3, 4), _onesCategory);
            _scoringSystem.PreviewScore(CreateDice(2, 2, 2, 3, 4), _twosCategory);

            Assert.AreEqual(3, _instance.RemainingUses);
            Assert.AreEqual(1, _registry.All.Count);
            Assert.IsTrue(_instance.IsActive);
        }

        /// <summary>
        /// Подтверждение категории расходует ровно один заряд модификатора.
        /// </summary>
        [Test]
        public void ScoreCategory_ConsumesExactlyOneCharge()
        {
            _scoringSystem.ScoreCategory(CreateDice(1, 1, 2, 3, 4), _onesCategory);

            Assert.AreEqual(2, _instance.RemainingUses);
            Assert.AreEqual(1, _registry.All.Count);
        }

        /// <summary>
        /// Модификатор удаляется из реестра после полного исчерпания зарядов.
        /// </summary>
        [Test]
        public void ScoreCategory_RemovesModifier_WhenChargesExhausted()
        {
            _scoringSystem.ScoreCategory(CreateDice(1, 1, 2, 3, 4), _onesCategory);
            _scoringSystem.ScoreCategory(CreateDice(2, 2, 2, 3, 4), _twosCategory);
            _scoringSystem.ScoreCategory(CreateDice(1, 2, 3, 4, 5), _chanceCategory);

            Assert.AreEqual(0, _registry.All.Count);
            Assert.AreEqual(0, _registry.ActiveCount);
        }

        private IReadOnlyList<IDice> CreateDice(params int[] values)
        {
            var dice = new DiceInstance[values.Length];
            for (var i = 0; i < values.Length; i++)
                dice[i] = new DiceInstance(_standardDice, values[i]);
            return dice;
        }

        private T AddCreatedAsset<T>(T asset) where T : Object
        {
            _createdAssets.Add(asset);
            return asset;
        }
    }
}