using ElectronicsShopContracts.BindingModels;
using ElectronicsShopContracts.BusinessLogicContracts;
using ElectronicsShopContracts.SearchModels;
using ElectronicsShopContracts.StorageContracts;
using ElectronicsShopContracts.ViewModels;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ElectronicsShopBusinessLogic.BusinessLogic
{
    public class RoleLogic : IRoleLogic
    {
        private readonly ILogger _logger;
        private readonly IRoleStorage _storage;

        public RoleLogic(ILogger<RoleLogic> logger, IRoleStorage storage)
        {
            _logger = logger;
            _storage = storage;
        }

        public bool Create(RoleBindingModel model)
        {
            CheckModel(model);
            if (_storage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

        public bool Delete(RoleBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation($"Delete. ID:{model.ID}");
            if (_storage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }
        public bool Update(RoleBindingModel model)
        {
            CheckModel(model);
            if (_storage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }

        public List<RoleViewModel>? ReadList(RoleSearchModel? model)
        {
            _logger.LogInformation($"ReadList. ID:{model?.ID}");
            var list = model == null ? _storage.GetFullList() : _storage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation($"ReadList. Count:{list.Count}");
            return list;
        }

        private void CheckModel(RoleBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.Name))
            {
                throw new ArgumentNullException("Нет названия категории продукта", nameof(model.Name));
            }
            _logger.LogInformation($"CategoryProduct. ID:{model.ID}.Name:{model.Name}");
            
            var element = _storage.GetElement(new  RoleSearchModel
			{
				Name = model.Name
			});
			if (element != null && element.ID != model.ID)
			{
				throw new InvalidOperationException("Такая роль уже есть");
			}
            
        }
    }
}