using ConstructionCompanyContracts.BindingModels;
using ConstructionCompanyContracts.BusinessLogicContracts;
using ConstructionCompanyContracts.SearchModels;
using ConstructionCompanyContracts.StorageContracts;
using ConstructionCompanyContracts.ViewModels;
using ConstructionCompanyDataModels.Enums;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConstructionCompanyBusinessLogic.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.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }

        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 bool CreateOrder(OrderBindingModel model)
        {
            CheckModel(model);
            if (model.Status != OrderStatus.Неизвестен) return false;
            model.Status = OrderStatus.Принят;
            if (_orderStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

        public bool FinishOrder(OrderBindingModel model)
        {
            CheckModel(model, false);
            var element = _orderStorage.GetElement(new OrderSearchModel
            {
                Id = model.Id
            });
            if (element == null)
            {
                _logger.LogWarning("Read operation failed");
                return false;
            }
            if (element.Status != OrderStatus.Выполняется)
            {
                _logger.LogWarning("Status change operation failed");
                throw new InvalidOperationException("Заказ должен быть переведен в статус выполнения перед готовностью!");
            }
            model.Status = OrderStatus.Завершён;
            _orderStorage.Update(model);
            return true;
        }

        public bool TakeOrderInWork(OrderBindingModel model)
        {
            CheckModel(model, false);
            var element = _orderStorage.GetElement(new OrderSearchModel
            {
                Id = model.Id
            });
            if (element == null)
            {
                _logger.LogWarning("Read operation failed");
                return false;
            }
            if (element.Status != OrderStatus.Принят)
            {
                _logger.LogWarning("Status change operation failed");
                throw new InvalidOperationException("Заказ должен быть переведен в статус принятого перед его выполнением!");
            }
            model.Status = OrderStatus.Выполняется;
            _orderStorage.Update(model);
            return true;
        }

        private void CheckModel(OrderBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            _logger.LogInformation("Order. Id:{Id}", model.Id);
            var element = _orderStorage.GetElement(new OrderSearchModel
            {
                Id = model.Id
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Заказ с таким названием уже есть");
            }
        }
    }
}