using DinerContracts.BindingModels;
using DinerContracts.BusinessLogicsContacts;
using DinerContracts.SearchModels;
using DinerContracts.StoragesContracts;
using DinerContracts.ViewModels;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DineryBusinessLogic.BusinessLogic
{
    public class FoodLogic : IFoodLogic
    {
        private readonly ILogger _logger;
        private readonly IFoodStorage _componentStorage;

        public FoodLogic(ILogger<FoodLogic> logger, IFoodStorage componentStorage) { 
            _logger = logger;
            _componentStorage = componentStorage;
        }

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

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

        public FoodViewModel? ReadElement(FoodSearchModel model)
        {
            if (model == null) throw new ArgumentNullException(nameof(model));
            _logger.LogInformation("ReadElement. ProductName:{ProductName}. ID:{ID}", model.ComponentName, model.ID);
            var element = _componentStorage.GetElement(model);
            if (element == null) {
                _logger.LogWarning("ReadElement. element not found");
                return null;
            }
            _logger.LogInformation("ReadElement find. ID:{ID}", element.ID);
            return element;
        }

        public List<FoodViewModel>? ReadList(FoodSearchModel? model)
        {
            _logger.LogInformation("ReadList. ProductName:{ProductName}. ID:{ID}", model?.ComponentName, model?.ID);
            var list = model == null ? _componentStorage.GetFullList() : _componentStorage.GetFilteredList(model);
            if (list == null) {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }

        public bool Update(FoodBindingModel model)
        {
            CheckModel(model);
            if (_componentStorage.Update(model) == null) {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }
        
        private void CheckModel(FoodBindingModel model, bool withParams = true) { 
            if (model == null) throw new ArgumentNullException(nameof(model));
            if (!withParams) return;
            if (string.IsNullOrEmpty(model.ComponentName)) 
                throw new ArgumentNullException("Нет названия компонента", nameof(model.ComponentName));
            if (model.Price <= 0)
                throw new ArgumentNullException("Цена компонента должна быть больше 0", nameof(model.Price));
            _logger.LogInformation("Component. ProductName:{ProductName}. Price:{Price}. ID:{ID}",
                                    model.ComponentName, model.Price, model.ID);
            var element = _componentStorage.GetElement(new FoodSearchModel { ComponentName = model.ComponentName });
            if (element != null && element.ID != model.ID)
                throw new InvalidOperationException("Компонент с таким названием уже есть");
        }
    }
}