using CanteenContracts.BindingModels;
using CanteenContracts.BusinessLogicsContracts;
using CanteenContracts.SearchModel;
using CanteenContracts.SearchModels;
using CanteenContracts.StoragesContracts;
using CanteenContracts.View;
using CanteenDataModels.Models;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CanteenBusinessLogic.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 bool Create(OrderBindingModel model)
        {
            CheckModel(model);

            if (_orderStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }

            return true;
        }

        public bool Delete(OrderBindingModel model)
        {
            CheckModel(model, false);

            _logger.LogInformation("Delete. Id: {Id}", model.Id);
            if (_orderStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }

            return true;
        }

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

            _logger.LogInformation("ReadElement. Id: {Id}", model.Id);

            var element = _orderStorage.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<OrderViewModel>? ReadList(OrderSearchModel? model)
        {
            _logger.LogInformation("ReadList. Id: {Id}", model?.Id);

            var list = model == null ? _orderStorage.GetFullList() : _orderStorage.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(OrderBindingModel model)
        {
            CheckModel(model);

            if (_orderStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }

            return true;
        }

        public bool UpdateCooks(OrderBindingModel order, CookBindingModel cook)
        {
            var _order = _orderStorage.GetElement(new OrderSearchModel { Id = order.Id });
            _order.OrderCooks[cook.Id] = cook as ICookModel;
            if (_orderStorage.Update(new()
            {
                Id = _order.Id,
                Description = _order.Description,
                VisitorId = _order.VisitorId,
                OrderCooks = _order.OrderCooks

            }) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }

            return true;
        }

        public bool UpdateTablewares(OrderBindingModel order, TablewareBindingModel tableware, int count)
        {
            var _order = _orderStorage.GetElement(new OrderSearchModel { Id = order.Id });
            if (count == -1)
            {
                if (_order.OrderTablewares.ContainsKey(tableware.Id))
                {
                    _order.OrderTablewares.Remove(tableware.Id);
                }
            }
            else if (count > 0)
            {
                _order.OrderTablewares[tableware.Id] = (tableware, count);
            }
            if (_orderStorage.Update(new()
            {
                Id = _order.Id,
                Description = _order.Description,
                VisitorId = _order.VisitorId,
                OrderTablewares = _order.OrderTablewares

            }) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }

            return true;
        }

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

            if (!withParams)
            {
                return;
            }

            if (string.IsNullOrEmpty(model.Description))
            {
                throw new ArgumentNullException("Нет описание заказа", nameof(model.Description));
            }

            if (model.VisitorId <= 0)
            {
                throw new ArgumentNullException("id посетителя должен быть больше 0", nameof(model.VisitorId));
            }

            _logger.LogInformation("Order. Description: {Description}. VisitorId: {VisitorId}. Id: {Id}", model.Description, model.VisitorId, model.Id);

            var element = _orderStorage.GetElement(new OrderSearchModel { Id = model.Id });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Заказ с таким id уже есть");
            }
        }
    }
}