using DepartmentBusinessLogic.BindingModels;
using DepartmentBusinessLogic.Enums;
using DepartmentBusinessLogic.HelperModels;
using DepartmentBusinessLogic.Interfaces;
using DepartmentBusinessLogic.ViewModels;
using ModuleTools.BusinessLogics;
using ModuleTools.Enums;
using ModuleTools.Extensions;
using SecurityBusinessLogic.BindingModels;
using SecurityBusinessLogic.BusinessLogics;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;

namespace DepartmentBusinessLogic.BusinessLogics
{
	/// <summary>
	/// Логика работы с историями синхронизации приказов
	/// </summary>
	public class OrderSyncHistoryBusinessLogic : GenericBusinessLogic<OrderSyncHistoryGetBindingModel, OrderSyncHistorySetBindingModel, OrderSyncHistoryListViewModel, OrderSyncHistoryViewModel>
	{
		public OrderSyncHistoryBusinessLogic(IOrderSyncHistoryService service) : base(service, "Синхронизация Приказов", AccessOperation.СинхронизацияПриказов) { }

		public async Task<bool> SyncOrders()
		{
			var history = await CreateAsync(new OrderSyncHistorySetBindingModel { SyncDate = DateTime.Now });
			if (history == null)
			{
				Errors.Add(("Ошибка создание истории", "Не удалось создать историю"));
				return false;
			}

			var recordLogic = DependencyManager.Instance.Resolve<OrderSyncHistoryRecordBusinessLogic>();

			var enviromentSettingLogic = DependencyManager.Instance.Resolve<EnviromentSettingBusinessLogic>();

			var address = (await enviromentSettingLogic.GetListAsync(new EnviromentSettingGetBindingModel { Key = "SyncStudentOrderIpAddress" }))?.List?.FirstOrDefault();
			if (address == null || address.Value.IsEmpty())
			{
				Errors = enviromentSettingLogic.Errors;
				Errors.Add(("Ошибка получения данных", "Не удалось получить адрес серверая для получения приказов по студентам"));
				await recordLogic.CreateAsync(new OrderSyncHistoryRecordSetBindingModel
				{
					OrderSyncHistoryId = history.Id,
					Information = string.Join(Environment.NewLine, Errors.Select(x => x.Message))
				});
				return false;
			}

			var username = (await enviromentSettingLogic.GetListAsync(new EnviromentSettingGetBindingModel { Key = "SyncStudentOrderUserName" }))?.List?.FirstOrDefault();
			if (username == null || username.Value.IsEmpty())
			{
				Errors = enviromentSettingLogic.Errors;
				Errors.Add(("Ошибка получения данных", "Не удалось получить имя пользователя для получения приказов по студентам"));
				await recordLogic.CreateAsync(new OrderSyncHistoryRecordSetBindingModel
				{
					OrderSyncHistoryId = history.Id,
					Information = string.Join(Environment.NewLine, Errors.Select(x => x.Message))
				});
				return false;
			}

			var password = (await enviromentSettingLogic.GetListAsync(new EnviromentSettingGetBindingModel { Key = "SyncStudentOrderPassword" }))?.List?.FirstOrDefault();
			if (password == null || password.Value.IsEmpty())
			{
				Errors = enviromentSettingLogic.Errors;
				Errors.Add(("Ошибка получения данных", "Не удалось получить пароль для получения приказов по студентам"));
				await recordLogic.CreateAsync(new OrderSyncHistoryRecordSetBindingModel
				{
					OrderSyncHistoryId = history.Id,
					Information = string.Join(Environment.NewLine, Errors.Select(x => x.Message))
				});
				return false;
			}

			var client = new HttpClient
			{
				BaseAddress = new Uri(address.Value)
			};
			client.DefaultRequestHeaders.Accept.Clear();
			client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
			client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(Encoding.UTF8.GetBytes($"{username.Value}:{password.Value}")));

			// авторизация

			// получение списка студентов
			HttpResponseMessage response = await client.GetAsync($"{address.Value}/univer_Testing/hs/Ulstu_StudentsInfo/v1/GetCurrentStudentsOfDepartment");
			if (!response.IsSuccessStatusCode)
			{
				Errors.Add(("Ошибка получения данных", "Не удалось получить список студентов с сервера"));
				await recordLogic.CreateAsync(new OrderSyncHistoryRecordSetBindingModel
				{
					OrderSyncHistoryId = history.Id,
					Information = string.Join(Environment.NewLine, Errors.Select(x => x.Message))
				});
				return false;
			}
			var studentFromServer = JsonSerializer.Deserialize<StudentListSyncModel>(response.Content.ReadAsStringAsync().Result);
			if (studentFromServer.CurrentStudentsList.Count == 0)
			{
				await recordLogic.CreateAsync(new OrderSyncHistoryRecordSetBindingModel
				{
					OrderSyncHistoryId = history.Id,
					Information = "Полученный список студентов пустой"
				});
				return true;
			}

			var groupsLogic = DependencyManager.Instance.Resolve<StudentGroupBusinessLogic>();
			var groups = await groupsLogic.GetListAsync(new StudentGroupGetBindingModel());
			if (groups == null || groups.List == null)
			{
				Errors = groupsLogic.Errors;
				Errors.Add(("Ошибка получения данных", "Не удалось получить список групп"));
				await recordLogic.CreateAsync(new OrderSyncHistoryRecordSetBindingModel
				{
					OrderSyncHistoryId = history.Id,
					Information = string.Join(Environment.NewLine, Errors.Select(x => x.Message))
				});
				return false;
			}

			var studentLogic = DependencyManager.Instance.Resolve<StudentBusinessLogic>();
			var userLogic = DependencyManager.Instance.Resolve<UserBusinessLogic>();
			foreach (var group in groups.List)
			{
				var students = await studentLogic.GetListAsync(new StudentGetBindingModel { StudentGroupId = group.Id });
				foreach (var student in students.List)
				{
					var studentSync = studentFromServer.CurrentStudentsList.FirstOrDefault(x => x.recordBookName == student.NumberOfBook);
					// студент не найден, значит он ушел с кафедры, выясняем почему
					if (studentSync == null)
					{
						await SyncStudentOrders(history, student, client, address.Value, studentSync.iduniv);
					}
					// перевод в другую группу
					else if (group.GroupName != studentSync.groupName)
					{
						await SyncStudentOrders(history, student, client, address.Value, studentSync.iduniv);
					}

					studentFromServer.CurrentStudentsList.Remove(studentSync);
				}
				// новые студенты в группе
				var studentSyncs = studentFromServer.CurrentStudentsList.Where(x => x.groupName == group.GroupName);
				foreach (var student in studentSyncs)
				{
					var userName = $"{student.lastName}{(student.firstName.IsNotEmpty() ? $" {student.firstName[0]}." : string.Empty)}{(student.patronymicName.IsNotEmpty() ? $"{student.patronymicName[0]}." : string.Empty)}";
					var result = await userLogic.GetListAsync(new UserGetBindingModel { UserNameForSearch = userName });

					var newuser = await userLogic.CreateAsync(new UserSetBindingModel
					{
						Login = userName,
						Password = student.recordBookName
					});
					if (newuser == null)
					{
						var errors = userLogic.Errors;
						errors.Add(("Ошибка создания пользователя под студента", $"Не удалось создать пользователя под студента {student.lastName} {student.firstName} {student.patronymicName}"));
						await recordLogic.CreateAsync(new OrderSyncHistoryRecordSetBindingModel
						{
							OrderSyncHistoryId = history.Id,
							Information = string.Join(Environment.NewLine, errors.Select(x => x.Message))
						});
						continue;
					}

					var newStudent = await studentLogic.CreateAsync(new StudentSetBindingModel
					{
						UserId = newuser.Id,
						FirstName = student.firstName,
						LastName = student.lastName,
						Patronymic = student.patronymicName,
						NumberOfBook = student.recordBookName,
						StudentGroupId = group.Id,
						StudentState = GetStudentState(student.stateName),
						Description = student.presenatationOfRecordBook
					});

					if (newStudent == null)
					{
						var errors = studentLogic.Errors;
						errors.Add(("Ошибка добавления студента", $"Не удалось добавить студента {student.lastName} {student.firstName} {student.patronymicName}"));
						await recordLogic.CreateAsync(new OrderSyncHistoryRecordSetBindingModel
						{
							OrderSyncHistoryId = history.Id,
							Information = string.Join(Environment.NewLine, errors.Select(x => x.Message))
						});
						continue;
					}

					await recordLogic.CreateAsync(new OrderSyncHistoryRecordSetBindingModel
					{
						OrderSyncHistoryId = history.Id,
						Information = $"Добавлен студент {newStudent}"
					});

					await SyncStudentOrders(history, newStudent, client, address.Value, student.iduniv);

					studentFromServer.CurrentStudentsList.Remove(student);
				}
			}

			return true;
		}

		private static StudentState GetStudentState(string state) => state switch
		{
			"Является студентом" => StudentState.Учится,
			"Находится в академическом отпуске" => StudentState.Академ,
			_ => StudentState.Неопределен,
		};

		/// <summary>
		/// Синхронизация приказов по студенту
		/// </summary>
		/// <param name="history"></param>
		/// <param name="student"></param>
		/// <param name="client"></param>
		/// <param name="address"></param>
		/// <param name="iduniv"></param>
		/// <returns></returns>
		private async Task SyncStudentOrders(OrderSyncHistoryViewModel history, StudentViewModel student, HttpClient client, string address, string iduniv)
		{
			var recordLogic = DependencyManager.Instance.Resolve<OrderSyncHistoryRecordBusinessLogic>();
			var orderLogic = DependencyManager.Instance.Resolve<OrderBusinessLogic>();
			HttpResponseMessage response = await client.GetAsync($"{address}/univer_Testing/hs/Ulstu_StudentsInfo/v1/GetStudentOrdersByIdAndRecordBook?iduniv={iduniv}&recordBookName={student.NumberOfBook}&allOrders=sppd");
			if (!response.IsSuccessStatusCode)
			{
				Errors.Add(("Ошибка получения данных", "Не удалось получить список приказов по студенту"));
				await recordLogic.CreateAsync(new OrderSyncHistoryRecordSetBindingModel
				{
					OrderSyncHistoryId = history.Id,
					Information = string.Join(Environment.NewLine, Errors.Select(x => x.Message))
				});
				return;
			}
			var syncOrders = JsonSerializer.Deserialize<StudentOrderListSyncModel>(response.Content.ReadAsStringAsync().Result);
			foreach(var syncOrder in syncOrders.StudentOrders)
			{
				var orderType = GetOrderType(syncOrder.orderSubTypeName);
				if (orderType != OrderType.Неопределено)
				{
					var order = await orderLogic.GetListAsync(new OrderGetBindingModel { OrderNumber = syncOrder.clericNumber, OrderDate = Convert.ToDateTime(syncOrder.clericDate) });

				}
			}
		}

		private static OrderType GetOrderType(string orderTitle) => orderTitle switch
		{
			"Зачисление в вуз" => OrderType.ЗачислениеСтудентов,
			"Распределение по группам" => OrderType.РаспределениеСтудентов,
			"Перевод на следующий курс" => OrderType.ДвижениеСтудентов,
			_ => OrderType.Неопределено,
		};
	}
}