using ConfectioneryContracts.BindingModels;
using ConfectioneryContracts.BusinessLogicsContracts;
using ConfectioneryContracts.SearchModels;
using ConfectioneryContracts.ViewModels;
using ConfectioneryDataModels.Enums;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConfectioneryBusinessLogic.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("WorkerWorkAsync. Worker {Id} try get order {Order}", Implementer.Id, Order.Id);
						bool AcquireResult = _orderLogic.TakeOrderInWork(new OrderBindingModel
						{
							Id = Order.Id,
							ImplementerId = Implementer.Id
						});

						if (!AcquireResult)
						{
							_logger.LogDebug("WorkerWorkAsync. Worker {Id} tried to get order {Order} but it's already acquired by other worker", Implementer.Id, Order.Id);
							continue;
						}

						Thread.Sleep(Implementer.WorkExperience * _rnd.Next(100, 1000) * Order.Count);

						_logger.LogDebug("WorkerWorkAsync. Worker {Id} finish order {Order}", Implementer.Id, Order.Id);
						_orderLogic.FinishOrder(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");
					}
				}
			});
		}

		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("RunOrderInWork. Worker {Id} back to order {Order}", Implementer.Id, RunOrder.Id);
				Thread.Sleep(Implementer.WorkExperience * _rnd.Next(100, 300) * RunOrder.Count);

				_logger.LogDebug("RunOrderInWork. Worker {Id} finish order {Order}", Implementer.Id, RunOrder.Id);
				_orderLogic.FinishOrder(new OrderBindingModel
				{
					Id = RunOrder.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;
			}
		}
	}
}