using GiftShopContracts.BindingModels;
using GiftShopContracts.BusinessLogicsContracts;
using GiftShopContracts.SearchModels;
using GiftShopContracts.ViewModels;
using GiftShopDataModels.Enums;
using Microsoft.Extensions.Logging;

namespace GiftShopBusinessLogic.BusinessLogics
{
	public class WorkModeling : IWorkProcess
	{
		private readonly ILogger _logger;

		private readonly Random _rnd;

		private IOrderLogic? _orderLogic;

		public WorkModeling(ILogger<WorkModeling> logger)
		{
			_logger = logger;
			_rnd = new Random(1000);
		}

		public void DoWork(IImplementerLogic implementerLogic, IOrderLogic orderLogic)
		{
			_orderLogic = orderLogic;
			var implementers = implementerLogic.ReadList(null);
			if (implementers == null)
			{
				_logger.LogWarning("DoWork. Implementers is null");
				return;
			}

			var orders = _orderLogic.ReadList(new OrderSearchModel { Status = OrderStatus.Принят });
			if (orders == null || orders.Count == 0)
			{
				_logger.LogWarning("DoWork. Orders is null or empty");
				return;
			}

			_logger.LogDebug("DoWork for {Count} orders", orders.Count);

			foreach (var implementer in implementers)
			{
				Task.Run(() => WorkerWorkAsync(implementer, orders));
			}
		}

		private async Task WorkerWorkAsync(ImplementerViewModel implementer, List<OrderViewModel> orders)
		{
			if (_orderLogic == null || implementer == null)
			{
				return;
			}
			await RunOrderInWork(implementer);

			await Task.Run(() =>
			{
				foreach (var order in orders)
				{
					try
					{
						_logger.LogDebug("DoWork. Worker {Id} try get order {Order}", implementer.Id, order.Id);

						_orderLogic.TakeOrderInWork(new OrderBindingModel
						{
							Id = order.Id,
							ImplementerId = implementer.Id
						});

						Thread.Sleep(implementer.WorkExperience * _rnd.Next(100, 1000) * order.Count);
						_logger.LogDebug("DoWork. Worker {Id} finish order {Order}", implementer.Id, order.Id);

						_orderLogic.DeliveryOrder(new OrderBindingModel
						{
							Id = order.Id
						});

						Thread.Sleep(implementer.Qualification * _rnd.Next(10, 100));
					}

					catch (InvalidOperationException ex)
					{
						_logger.LogWarning(ex, "Error try get work");
					}

					catch (Exception ex)
					{
						_logger.LogError(ex, "Error while do work");
						throw;
					}
				}
			});
		}
		//ищем заказ которые уже в работе
		private async Task RunOrderInWork(ImplementerViewModel implementer)
		{
			if (_orderLogic == null || implementer == null)
			{
				return;
			}
			try
			{
				var runOrder = await Task.Run(() => _orderLogic.ReadElement(new OrderSearchModel
				{
					ImplementerId = implementer.Id,
					Status = OrderStatus.Выполняется
				}));
				if (runOrder == null)
				{
					return;
				}

				_logger.LogDebug("DoWork. Worker {Id} back to order {Order}", implementer.Id, runOrder.Id);
				// доделываем работу
				Thread.Sleep(implementer.WorkExperience * _rnd.Next(100, 300) * runOrder.Count);
				_logger.LogDebug("DoWork. Worker {Id} finish order {Order}", implementer.Id, runOrder.Id);
				_orderLogic.FinishOrder(new OrderBindingModel
				{
					Id = runOrder.Id
				});
				// отдыхаем
				Thread.Sleep(implementer.Qualification * _rnd.Next(10, 100));
			}

			catch (InvalidOperationException ex)
			{
				_logger.LogWarning(ex, "Error try get work");
			}

			catch (Exception ex)
			{
				_logger.LogError(ex, "Error while do work");
				throw;
			}
		}
	}
}