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

namespace HotelBusinessLogic.BusinessLogic
{
	public class OrganiserLogic : IOrganiserLogic
	{
        private readonly int _loginMaxLength = 25;
        private readonly int _passwordMaxLength = 50;
		private readonly int _passwordMinLength = 5;
		private readonly ILogger _logger;
		private readonly IOrganiserStorage _organiserStorage;

		public OrganiserLogic(ILogger<OrganiserLogic> logger, IOrganiserStorage organiserStorage)
		{
			_logger = logger;
			_organiserStorage = organiserStorage;
		}

		public List<OrganiserViewModel>? ReadList(OrganiserSearchModel? model)
		{
			_logger.LogInformation("ReadList. OrganiserFIO: {OrganiserFIO}. OrganiserLogin: {OrganiserLogin}. Id: {Id}.", model?.OrganiserFIO, model?.OrganiserLogin, model?.Id);

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

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

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

		public OrganiserViewModel? ReadElement(OrganiserSearchModel model)
		{
			if (model == null)
			{
				throw new ArgumentNullException(nameof(model));
			}

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

			var element = _organiserStorage.GetElement(model);

			if (element == null)
			{
				_logger.LogInformation("ReadElement element not found");
				return null;
			}

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

		public bool Create(OrganiserBindingModel model)
		{
			CheckModel(model);

			if (_organiserStorage.Insert(model) == null)
			{
				_logger.LogInformation("Insert error");
				return false;
			}

			return true;
		}

		public bool Update(OrganiserBindingModel model)
		{
			CheckModel(model);

			if (_organiserStorage.Update(model) == null)
			{
				_logger.LogInformation("Update error");
				return false;
			}

			return true;
		}

		public bool Delete(OrganiserBindingModel model)
		{
			CheckModel(model, false);

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

			if (_organiserStorage.Delete(model) == null)
			{
				_logger.LogInformation("Delete error");
				return false;
			}

			return true;
		}

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

            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.OrganiserFIO))
            {
                throw new ArgumentNullException("Нет ФИО организатора", nameof(model.OrganiserFIO));
            }
            if (string.IsNullOrEmpty(model.OrganiserLogin))
            {
                throw new ArgumentNullException("Нет логина организатора", nameof(model.OrganiserLogin));
            }
            if (model.OrganiserLogin.Length > _loginMaxLength)
            {
                throw new ArgumentNullException("Логин превышает допустимое количество символов", nameof(model.OrganiserLogin));
            }
            if (string.IsNullOrEmpty(model.OrganiserNumber))
            {
                throw new ArgumentNullException("Нет номера телефона организатора", nameof(model.OrganiserNumber));
            }
            if (string.IsNullOrEmpty(model.OrganiserEmail))
            {
                throw new ArgumentNullException("Нет эл. почты администратора", nameof(model.OrganiserEmail));
            }
            if (string.IsNullOrEmpty(model.OrganiserPassword))
            {
                throw new ArgumentNullException("Нет пароля организатора", nameof(model.OrganiserPassword));
            }
            if (model.OrganiserPassword.Length > _passwordMaxLength || model.OrganiserPassword.Length < _passwordMinLength || !Regex.IsMatch(model.OrganiserPassword, @"^((\w+\d+\W+)|(\w+\W+\d+)|(\d+\w+\W+)|(\d+\W+\w+)|(\W+\w+\d+)|(\W+\d+\w+))[\w\d\W]*$"))
            {
                throw new ArgumentNullException("Пароль превышает допустимое количество символов или их недостаточно", nameof(model.OrganiserPassword));
            }
            _logger.LogInformation("Organiser. OrganiserFIO: {OrganiserFIO}. OrganiserLogin: {OrganiserLogin}. OrganiserNumber: {OrganiserNumber}.OrganiserEmail: {OrganiserEmail}.OrganiserPassword: {OrganiserPassword}.Id: {Id}",
                model.OrganiserFIO, model.OrganiserLogin, model.OrganiserNumber, model.OrganiserEmail, model.OrganiserPassword, model.Id);

            var elementEmail = _organiserStorage.GetElement(new OrganiserSearchModel
            {
                OrganiserEmail = model.OrganiserEmail
            });
            if (elementEmail != null && elementEmail.Id != model.Id)
            {
                throw new InvalidOperationException("Администратор с такой почтой уже есть");
            }

            var elementLogin = _organiserStorage.GetElement(new OrganiserSearchModel
            {
                OrganiserLogin = model.OrganiserLogin
            });
            if (elementLogin != null && elementLogin.Id != model.Id)
            {
                throw new InvalidOperationException("Организатор с таким логином уже есть");
            }
        }
	}
}