using ComputersShopContracts.BindingModels;
using ComputersShopContracts.BuisnessLogicsContracts;
using ComputersShopContracts.SearchModels;
using ComputersShopContracts.StoragesContracts;
using ComputersShopContracts.ViewModels;
using ComputersShopDataModels.Enums;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ComputersShopBusinessLogic.BusinessLogics
{
    public class OrderLogic: IOrderLogic
    {
        private readonly ILogger _logger;
        private readonly IOrderStorage _orderStorage;
        public OrderLogic(ILogger<OrderLogic> logger, IOrderStorage orderStorage)
        {
            _logger = logger;
            _orderStorage = orderStorage;
        }
        public List<OrderViewModel>? ReadList(OrderSearchModel? model)
        {
            _logger.LogInformation("ReadList. Id:{Id}", model?.Id);
            var list = model == null ? _orderStorage.GetFullList() : _orderStorage.GetFiltredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }
        public bool CreateOrder(OrderBindingModel model)
        {
            CheckModel(model);
            if (model.Status != OrderStatus.Неизвестен)
            {
                _logger.LogWarning("Wrong order status. Insert operation failed");
                return false;
            }
            model.Status = OrderStatus.Принят;
            if (_orderStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }
        public bool TakeOrderInWork(OrderBindingModel model)
        {
            CheckModel(model);
            if (model.Status != OrderStatus.Принят)
            {
                _logger.LogWarning("Wrong order status. Update operation failed");
                return false;
            }
            model.Status = OrderStatus.Выполняется;
            if (_orderStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }
        public bool FinishOrder(OrderBindingModel model)
        {
            CheckModel(model);
            if (model.Status != OrderStatus.Выполняется)
            {
                _logger.LogWarning("Wrong order status. Update operation failed");
                return false;
            }
            model.Status = OrderStatus.Готов;
            if (_orderStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }

        public bool DeliveryOrder(OrderBindingModel model)
        {
            CheckModel(model);
            if (model.Status != OrderStatus.Готов)
            {
                _logger.LogWarning("Wrong order status. Update operation failed");
                return false;
            }
            model.Status = OrderStatus.Выдан;
            if (_orderStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }
        // нужен ли в данном случае withParams??
        private void CheckModel(OrderBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (model.Sum <= 0)
            {
                throw new ArgumentNullException("Цена должна быть больше 0", nameof(model.Sum));
            }
            if (model.Count <= 0)
            {
                throw new ArgumentNullException("Количество изделий должно быть больше 0", nameof(model.Count));
            }
            if (model.DateImplement.HasValue && model.DateImplement < model.DateCreate)
            {
                throw new ArithmeticException($"Дата выдачи заказа {model.DateImplement} должна быть позже даты его создания {model.DateCreate}");
            }
            _logger.LogInformation("Order. Id:{Id}. Sum:{Sum}. ComputerId:{ComputerId}", model.Id, model.Sum, model.ComputerId);
            var element = _orderStorage.GetElement(new OrderSearchModel
            {
                Id = model.Id
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Заказ с таким номером уже есть");
            }
        }
    }
}