using _0_Framework.Application;
using AccountManagement.Application.Contracts.Task;
using AccountManagement.Application.Contracts.TaskSchedule;
using AccountManagement.Domain.TaskScheduleAgg;
using System;
using System.IO;
using Company.Domain.HolidayItemAgg;

namespace AccountManagement.Application;

public class TaskScheduleApplication : ITaskScheduleApplication
{
	private readonly ITaskApplication _taskApplication;
	private readonly ITaskScheduleRepository _taskScheduleRepository;
	private readonly IHolidayItemRepository _holidayItemRepository;

	public TaskScheduleApplication(ITaskApplication taskApplication, ITaskScheduleRepository taskScheduleRepository, IHolidayItemRepository holidayItemRepository)
	{
		_taskApplication = taskApplication;
		_taskScheduleRepository = taskScheduleRepository;
		_holidayItemRepository = holidayItemRepository;
	}

	public OperationResult Create(CreateTask command)
	{
		OperationResult operation = new OperationResult();


		if (command.HasSchedule)
		{
			switch (command.ScheduleType)
			{
				case "limited":
					if (Convert.ToInt32(command.ScheduleCount) > 60)
					{
						return operation.Failed("تعداد وارد شده بیشتر از حد مجاز است");
					}
					return CreateLimitedTasks(command);
					break;

				case "unlimited":
					return CreateUnlimitedTasks(command);
					break;

				default:
					return operation.Failed("خطای سیستمی!");

			}
		}
		else
		{
			return operation.Failed("این تسک بصورت زمان بندی شده نمیباشد");
		}
	}

	public OperationResult CreateLimitedTasks(CreateTask command)
	{
		OperationResult operation = new OperationResult();
		if (Convert.ToInt32(command.ScheduleCount) < 1 || string.IsNullOrWhiteSpace(command.ScheduleCount))
		{
			return operation.Failed("تعداد وارد شده باید بیشتر از 2 باشد");
		}

		switch (command.ScheduleUnitType)
		{
			case "year":
				if (Convert.ToInt32(command.ScheduleCount) != 1)
				{
					return operation.Failed("دوره نمیتواند بیشتر از 1 سال باشد");
				}
				break;
			case "month":
				if (Convert.ToInt32(command.ScheduleCount) > 12)
				{
					return operation.Failed("بازه وارد شده نا معتبر است");
				}
				break;
			case "week":
				if (command.ScheduleUnitNumber != "first" && command.ScheduleUnitNumber != "last")
				{
					return operation.Failed("بازه وارد شده نا معتبر است");
				}
				break;
			case "day":
				if (Convert.ToInt32(command.ScheduleUnitNumber) > 29)
				{
					return operation.Failed("بازه وارد شده نا معتبر است");
				}
				break;
			default:
				return operation.Failed("نوع بازه مشخص نمیباشد");
				break;

		}
		try
		{
			DateTime previousDateRaw = command.EndTaskDate.ToGeorgianDateTime2();
			DateTime previousDateEdited = command.EndTaskDate.ToGeorgianDateTime2();

			int count = Convert.ToInt32(command.ScheduleCount);
			bool isInt = int.TryParse(command.ScheduleUnitNumber, out int unitNumber);
			string kindOfWeekUnit = isInt ? "" : command.ScheduleUnitNumber;
			var taskSchedule = new TaskSchedule(command.ScheduleCount, command.ScheduleType, command.ScheduleUnitType,
				command.ScheduleUnitNumber, previousDateEdited);
			_taskScheduleRepository.Create(taskSchedule);
			_taskScheduleRepository.SaveChanges();
			command.TaskScheduleId = taskSchedule.id;

			switch (command.ScheduleUnitType)
			{
				case "year":
					for (int i = 1; i <= count; i++)
					{
						command.EndTaskDate = previousDateEdited.ToFarsi();
						operation = _taskApplication.CreateTask(command);
						taskSchedule.SetLastEndTaskDate(previousDateEdited);

						bool isHoliday = _holidayItemRepository.GetHoliday(previousDateRaw);
						while (isHoliday || previousDateEdited.DayOfWeek == DayOfWeek.Friday)
						{
							previousDateEdited = previousDateRaw.AddDays(1);
							isHoliday = _holidayItemRepository.GetHoliday(previousDateEdited);

						}
						previousDateRaw = previousDateRaw.AddYears(unitNumber);
						previousDateEdited = previousDateRaw;

					}
					break;

				case "month":
					for (int i = 1; i <= count; i++)
					{
						command.EndTaskDate = previousDateEdited.ToFarsi();
						operation = _taskApplication.CreateTask(command);
						taskSchedule.SetLastEndTaskDate(previousDateEdited);
						bool isHoliday = _holidayItemRepository.GetHoliday(previousDateRaw);
						while (isHoliday || previousDateEdited.DayOfWeek == DayOfWeek.Friday)
						{
							previousDateEdited = previousDateRaw.AddDays(1);
							isHoliday = _holidayItemRepository.GetHoliday(previousDateEdited);

						}
						previousDateRaw = previousDateRaw.AddMonths(unitNumber);
						previousDateEdited = previousDateRaw;

					}
					break;

				case "week":
					for (int i = 1; i <= count; i++)
					{
						if (string.IsNullOrWhiteSpace(kindOfWeekUnit))
						{
							throw new InvalidDataException();
						}

						command.EndTaskDate = kindOfWeekUnit switch
						{
							"first" => previousDateRaw.GetNextDayOfWeek(DayOfWeek.Saturday).ToFarsi(),
							"last" => previousDateRaw.GetNextDayOfWeek(DayOfWeek.Thursday).ToFarsi(),
							_ => throw new InvalidDataException()
						};
						operation = _taskApplication.CreateTask(command);
						taskSchedule.SetLastEndTaskDate(previousDateEdited);
						bool isHoliday = _holidayItemRepository.GetHoliday(previousDateRaw);
						while (isHoliday || previousDateEdited.DayOfWeek == DayOfWeek.Friday)
						{
							previousDateEdited = previousDateRaw.AddDays(1);
							isHoliday = _holidayItemRepository.GetHoliday(previousDateEdited);

						}
						previousDateRaw = command.EndTaskDate.ToGeorgianDateTime();
						previousDateEdited = previousDateRaw;


					}
					break;

				case "day":

					for (int i = 1; i <= count; i++)
					{
						command.EndTaskDate = previousDateEdited.ToFarsi();
						operation = _taskApplication.CreateTask(command);
						taskSchedule.SetLastEndTaskDate(previousDateEdited);
						previousDateRaw = previousDateRaw.AddDays(unitNumber);
						bool isHoliday = _holidayItemRepository.GetHoliday(previousDateRaw);
						while (isHoliday || previousDateEdited.DayOfWeek == DayOfWeek.Friday)
						{
							previousDateEdited = previousDateRaw.AddDays(1);
							isHoliday = _holidayItemRepository.GetHoliday(previousDateEdited);

						}

						previousDateEdited = previousDateRaw;
					}
					break;

			}
			_taskScheduleRepository.SaveChanges();
			operation = operation.Succcedded();
			return operation;
		}
		catch (Exception e)
		{
			return operation.Failed(e.ToString());
		}
	}

	public OperationResult CreateUnlimitedTasks(CreateTask command)
	{
		var operation = _taskApplication.CreateTask(command);
		if (!operation.IsSuccedded)
			return operation;
		var lastDate = command.EndTaskDate.ToGeorgianDateTime();
		var taskSchedule = new TaskSchedule(command.ScheduleCount, command.ScheduleType, command.ScheduleUnitType,
			command.ScheduleUnitNumber, lastDate);
		_taskScheduleRepository.Create(taskSchedule);
		_taskScheduleRepository.SaveChanges();
		return operation.Succcedded();

	}

}