using HotelContracts.BindingModels;
using HotelContracts.BusinessLogicsContracts;
using HotelContracts.SearchModels;
using HotelContracts.StoragesContracts;
using HotelContracts.ViewModels;
using HotelDataModels.Models;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace HotelBusinessLogic.BusinessLogic
{
	public class RoomLogic : IRoomLogic
	{
		private readonly ILogger _logger;
		private readonly IRoomStorage _roomStorage;
		public RoomLogic(ILogger<RoomLogic> logger, IRoomStorage roomStorage)
		{
			_logger = logger;
			_roomStorage = roomStorage;
		}
		public List<RoomViewModel>? ReadList(RoomSearchModel? model)
		{
			_logger.LogInformation("ReadList. RoomNumber:{RoomNumber}.Id:{ Id}", model?.RoomNumber, model?.Id);

			var list = model == null ? _roomStorage.GetFullList() : _roomStorage.GetFilteredList(model);

			if (list == null)
			{
				_logger.LogWarning("ReadList return null list");
				return null;
			}

			_logger.LogInformation("ReadList. Count:{Count}", list.Count);

			return list;
		}
		public RoomViewModel? ReadElement(RoomSearchModel model)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}

			_logger.LogInformation("ReadElement. RoomNumber:{RoomNumber}.Id:{Id}", model.RoomNumber, model.Id);

			var element = _roomStorage.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 Create(RoomBindingModel model)
		{
			CheckModel(model);

			if (_roomStorage.Insert(model) == null)
			{
				_logger.LogWarning("Insert operation failed");
				return false;
			}

			return true;
		}
		public bool Update(RoomBindingModel model)
		{
			CheckModel(model);

			if (_roomStorage.Update(model) == null)
			{
				_logger.LogWarning("Update operation failed");
				return false;
			}

			return true;
		}
		public bool Delete(RoomBindingModel model)
		{
			CheckModel(model, false);

			_logger.LogInformation("Delete. Id:{Id}", model.Id);

			if (_roomStorage.Delete(model) == null)
			{
				_logger.LogWarning("Delete operation failed");
				return false;
			}

			return true;
		}
		public bool AddDinnerToRoom(RoomSearchModel model, IDinnerModel dinner)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}

			_logger.LogInformation("AddDinnerToRoom. RoomNumber:{RoomNumber}.Id:{ Id}", model.RoomNumber, model.Id);
			var element = _roomStorage.GetElement(model);

			if (element == null)
			{
				_logger.LogWarning("AddDinnerToRoom element not found");
				return false;
			}

			_logger.LogInformation("AddDinnerToRoom find. Id:{Id}", element.Id);

			element.RoomDinners[dinner.Id] = dinner;

			_roomStorage.Update(new()
			{
				Id = element.Id,
				RoomNumber = element.RoomNumber,
				RoomPrice = element.RoomPrice,
				CountBeds = element.CountBeds,
				MealPlanId = element.MealPlanId,
				AdministratorId = element.AdministratorId,
				RoomDinners = element.RoomDinners,
			});

			return true;
		}

		private void CheckModel(RoomBindingModel model, bool withParams = true)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}

			if (!withParams)
			{
				return;
			}

			if (model.RoomNumber < 0)
			{
				throw new ArgumentNullException("Номер комнаты не может быть меньше 0", nameof(model.RoomNumber));
			}
			if (model.CountBeds < 0)
			{
				throw new ArgumentNullException("Количество спальных мест не может быть меньше 0", nameof(model.CountBeds));
			}
			if (model.RoomPrice < 0)
			{
				throw new ArgumentNullException("Цена комнаты не может быть меньше 0", nameof(model.RoomPrice));
			}

			_logger.LogInformation("Room. RoomNumber:{RoomNumber}.CountBeds:{CountBeds}.RoomPrice:{RoomPrice}. Id: {Id}", model.RoomNumber, model.CountBeds, model.RoomPrice, model.Id);
		}
	}
}