using CanteenContracts.BindingModels;
using CanteenContracts.BusinessLogicsContracts;
using CanteenContracts.SearchModel;
using CanteenContracts.SearchModels;
using CanteenContracts.StoragesContracts;
using CanteenContracts.View;
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 AddCook(OrderCookBindingModel model)
        {
            CheckModel(model);
            _logger.LogInformation("AddOrder. OrderId: {OrderId}. CookId: {CookId}", model.OrderId, model.CookId);
            if (!_orderStorage.AddCook(model))
            {
                _logger.LogWarning("AddOrder operation failed");
                return false;
            }

            return true;
        }

        public bool AddTableware(OrderTablewareBindingModel model)
        {
            CheckModel(model);
            _logger.LogInformation("AddTableware. OrderId: {OrderId}. TablewareId: {TablewareId}", model.OrderId, model.TablewareId);
            if (!_orderStorage.AddTableware(model))
            {
                _logger.LogWarning("AddTableware operation failed");
                return false; 
            }

            return true;
        }

        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;
        }

        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));
            }

            if (model.Sum <= 0)
            {
                throw new ArgumentNullException("Сумма заказа должна быть больше 0", nameof(model.Sum));
            }

            _logger.LogInformation("Order. Description: {Description}. Sum: {Sum}. VisitorId: {VisitorId}. Id: {Id}", model.Description, model.Sum, 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");
            }
        }
        private void CheckModel(OrderCookBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }

            if (!withParams)
            {
                return;
            }

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

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

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

            _logger.LogInformation("OrderCook. OrderId: {OrderId}. CookId: {CookId}. VisitorId: {VisitorId}", model.OrderId, model.CookId, model.VisitorId);

            var element = _orderStorage.GetOrderCookElement(new OrderCookSearchModel { Id = model.Id, OrderId = model.OrderId, CookId = model.CookId });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Такая связь уже есть");
            }
        }
        private void CheckModel(OrderTablewareBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }

            if (!withParams)
            {
                return;
            }

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

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

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

            if (model.CountTablewares <= 0)
            {
                throw new ArgumentNullException("количество одного прибора должено быть больше 0", nameof(model.CountTablewares));
            }

            _logger.LogInformation("OrderTableware. OrderId: {OrderId}. TablewareId: {TablewareId}. VisitorId: {VisitorId}. CountTablewares: {CountTablewares}", model.OrderId, model.TablewareId, model.VisitorId, model.CountTablewares);

            var element = _orderStorage.GetElement(new OrderSearchModel { Id = model.OrderId});
            if (element != null && element.Id == model.OrderId && element.TablewareId == model.TablewareId)
            {
                throw new InvalidOperationException("Такая связь уже есть");
            }
        }
    }
}