using PlumbingRepairContracts.BindingModels;
using PlumbingRepairContracts.BusinessLogicsContracts;
using PlumbingRepairContracts.SearchModels;
using PlumbingRepairContracts.ViewModels;
using PlumbingRepairContracts.StoragesContracts;
using PlumbingRepairDataModels.Enums;
using Microsoft.Extensions.Logging;
using System.Xml.Linq;
using Org.BouncyCastle.Math.EC;
using PlumbingRepairBusinessLogic.MailWorker;

namespace PlumbingRepairBusinessLogic.BusinessLogics
{
    public class OrderLogic : IOrderLogic
    {
        private readonly ILogger _logger;

        private readonly IOrderStorage _orderStorage;
        private readonly AbstractMailWorker _mailWorker;
		private readonly IClientStorage _clientStorage;

		private readonly object _locker =new();

        public OrderLogic(ILogger<OrderLogic> logger, IOrderStorage orderStorage, IClientStorage clientStorage, AbstractMailWorker mailWorker)
        {
            _logger = logger;
            _orderStorage = orderStorage;
            _clientStorage = clientStorage;
            _mailWorker = mailWorker;
        }

        public OrderViewModel? ReadElement(OrderSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. DateFrom:{DateFrom}.DateTo:{DateTo}. Id:{Id}", model.DateFrom, model.DateTo, 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)
            {
                _logger.LogWarning("Invalid order status");
                return false;

            }
            model.Status = OrderStatus.Принят;
            var result = _orderStorage.Insert(model);
            if (result == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
			var orderView = _orderStorage.GetElement(new() { Id = result.Id });
			var clientView = _clientStorage.GetElement(new() { Id = orderView!.ClientId });

			SendEmail(clientView, orderView);
			return true;
        }

        public bool DeliveryOrder(OrderBindingModel model)
        {
            return ChangeStatus(model, OrderStatus.Выдан);
        }

        public bool FinishOrder(OrderBindingModel model)
        {
            return ChangeStatus(model, OrderStatus.Готов);
        }

        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 TakeOrderInWork(OrderBindingModel model)
        {
            lock (_locker)
            {
                return ChangeStatus(model, OrderStatus.Выполняется);
            }
        }
        public bool ChangeStatus(OrderBindingModel model, OrderStatus newStatus)
        {
            CheckModel(model, false);
            var element = _orderStorage.GetElement(new OrderSearchModel { Id = model.Id });
            if (element == null)
            {
                _logger.LogWarning("Find order failed");
                return false;
            }
            if (element.Status != newStatus - 1)
            {
                _logger.LogWarning("Status change failed");
                throw new InvalidOperationException("Невозможно перевести состояние заказа");
            }
            model.Status = newStatus;
            if (model.Status == OrderStatus.Выдан) 
                model.DateImplement = DateTime.Now;
            _orderStorage.Update(model);
			var orderView = _orderStorage.GetElement(new() { Id = model.Id });
			var clientView = _clientStorage.GetElement(new() { Id = orderView!.ClientId });

			SendEmail(clientView, orderView);
			return true;

        }
		public void SendEmail(ClientViewModel clientModel, OrderViewModel orderModel)
		{
			if (clientModel == null && orderModel == null)
			{
				return;
			}

			MailSendInfoBindingModel mailModel;

			if (orderModel.Status == OrderStatus.Принят)
			{
				mailModel = new MailSendInfoBindingModel
				{
					MailAddress = clientModel.Email,
					Subject = $"Order №{orderModel.Id}",
					Text = $"Your order №{orderModel.Id} by {orderModel.DateCreate} on {orderModel.Sum} was accepted!"
				};
			}
			else
			{
				mailModel = new MailSendInfoBindingModel
				{
					MailAddress = clientModel.Email,
					Subject = $"Order №{orderModel.Id}",
					Text = $"Order №{orderModel.Id} status was changed to {orderModel.Status}"
				};
			}


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

            if (!withParams)
            {
                return;
            }

            if (model.WorkId < 0)
            {
                throw new ArgumentNullException("Некорректный идентификатор работы", nameof(model.WorkId));
            }
            if (model.ClientId < 0)
            {
                throw new ArgumentNullException("Некорректный идентификатор клиента", nameof(model.ClientId));
            }
            if (model.Count <= 0)
            {
                throw new ArgumentNullException("Количество работ в заказе должно быть больше 0", nameof(model.Count));
            }

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

            _logger.LogInformation("Order. OrderId:{Id}. Sum:{Sum}. WorkId: {WorkId}. ClientId: {ClientId}", model.Id, model.Sum, model.WorkId, model.ClientId);
        }
    }
}