using AccountingWarehouseProductsContracts.BindingModels;
using AccountingWarehouseProductsContracts.BusinessLogicsContracts;
using AccountingWarehouseProductsContracts.SearchModels;
using AccountingWarehouseProductsContracts.StoragesContracts;
using AccountingWarehouseProductsContracts.ViewModels;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AccountingWarehouseProductsBusinessLogic.BusinessLogic
{
    public class OrderLogic : IOrderLogic
    {
        private readonly IOrderStorage _orderStorage;

        public OrderLogic(IOrderStorage orderStorage)
        {
            _orderStorage = orderStorage;
        }

        public OrderViewModel? ReadElement(OrderSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }

            var element = _orderStorage.GetElement(model);
            if (element == null)
            {
                return null;
            }
            return element;
        }

        public List<OrderViewModel>? ReadList(OrderSearchModel? model)
        {
            var list = model == null ? _orderStorage.GetFullList() : _orderStorage.GetFilteredList(model);
            if (list == null)
            {
                return null;
            }
            return list;
        }

        public bool Create(OrderBindingModel model)
        {
            CheckModel(model);
            if (_orderStorage.Insert(model) == null)
            {
                return false;
            }
            return true;
        }

        public bool Delete(OrderBindingModel model)
        {
            CheckModel(model, false);
            if (_orderStorage.Delete(model) == null)
            {
                return false;
            }
            return true;
        }

        public bool Update(OrderBindingModel model)
        {
            CheckModel(model);
            if (_orderStorage.Update(model) == null)
            {
                return false;
            }
            return true;
        }

        public bool OrderedOrder(OrderBindingModel model)
        {
            return StatusUpdate(model, AccountingWarehouseProductsDataModels.Enums.OrderStatus.Заказан);
        }

        public bool ComeOrder(OrderBindingModel model)
        {
            return StatusUpdate(model, AccountingWarehouseProductsDataModels.Enums.OrderStatus.Пришёл);
        }

        public bool TakeOrder(OrderBindingModel model)
        {
            return StatusUpdate(model, AccountingWarehouseProductsDataModels.Enums.OrderStatus.Принят);
        }

        public bool ArrangeOrder(OrderBindingModel model)
        {
            return StatusUpdate(model, AccountingWarehouseProductsDataModels.Enums.OrderStatus.Расстановлен);
        }

        public bool ChekOrder(OrderBindingModel model)
        {
            return StatusUpdate(model, AccountingWarehouseProductsDataModels.Enums.OrderStatus.Проверен);
        }

        public bool DeliverOrder(OrderBindingModel model)
        {
            return StatusUpdate(model, AccountingWarehouseProductsDataModels.Enums.OrderStatus.Доставлен);
        }

        private bool StatusUpdate(OrderBindingModel model, AccountingWarehouseProductsDataModels.Enums.OrderStatus newStatus)
        {

            if (model.Status + 1 != newStatus)
            {
                return false;
            }
            model.Status = newStatus;
            if (_orderStorage.Update(model) == null)
            {
                model.Status--;
                return false;
            }
            return true;
        }

        private void CheckModel(OrderBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
        }
    }
}