using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using UnityEngine;

namespace Module.ProjectValidator.Editor
{
    internal sealed class ValidatorList
    {
        private readonly Dictionary<Type, object> _attributeValidators = new();
        private readonly Dictionary<Type, List<object>> _componentValidators = new();
        public readonly List<IGameObjectValidator> GameObjectValidators = new();

        public void AddAttribute(Type type)
        {
            if (type.IsInterface || type.IsAbstract)
                return;

            var typeValidator = type.GetInterfaces().FirstOrDefault(typeInterface => typeInterface.IsGenericType && typeInterface.GetGenericTypeDefinition() == typeof(IAttributeValidator<>));
            var attType = typeValidator?.GetGenericArguments()[0];
                    
            if (attType == null)
                return;

            try
            {
                var instance = FormatterServices.GetUninitializedObject(type);
                _attributeValidators.Add(attType, instance);
            }
            catch (Exception e)
            {
                Debug.LogException(e);
            }
        }
        
        public void AddComponent(Type type)
        {
            if (type.IsInterface || type.IsAbstract)
                return;

            var typeValidator = type.GetInterfaces().FirstOrDefault(typeInterface => typeInterface.IsGenericType && typeInterface.GetGenericTypeDefinition() == typeof(IComponentValidator<>));
            var componentType = typeValidator?.GetGenericArguments()[0];
                    
            if (componentType == null)
                return;

            try
            {
                var instance = FormatterServices.GetUninitializedObject(type);

                if (_componentValidators.TryGetValue(componentType, out var list))
                    list.Add(instance);
                else
                    _componentValidators.Add(componentType, new List<object> { instance });
            }
            catch (Exception e)
            {
                Debug.LogException(e);
            }
        }

        public void AddGameObject(Type type)
        {
            if (type.IsInterface || type.IsAbstract)
                return;
            
            try
            {
                var instance = (IGameObjectValidator)FormatterServices.GetUninitializedObject(type);
                GameObjectValidators.Add(instance);
            }
            catch (Exception e)
            {
                Debug.LogException(e);
            }
        }

        public bool TryGetAttributeValidator(Type type, out object validatorInstance)
        {
            return _attributeValidators.TryGetValue(type, out validatorInstance);
        }
        
        public bool TryGetComponentValidator(Type type, out List<object> validatorInstances)
        {
            return _componentValidators.TryGetValue(type, out validatorInstances);
        }
    }
}