using Microsoft.Extensions.Logging;
using System.Text.RegularExpressions;
using TravelAgencyContracts.BindingModels;
using TravelAgencyContracts.BusinessLogicsContracts;
using TravelAgencyContracts.SearchModels;
using TravelAgencyContracts.StoragesContracts;
using TravelAgencyContracts.ViewModels;

namespace TravelAgencyBusinessLogic.BusinessLogics
{
    public class UserLogic : IUserLogic
    {
        private readonly ILogger _logger;

        private readonly IUserStorage _userStorage;

        public UserLogic(ILogger<UserLogic> logger, IUserStorage userStorage)
        {
            _logger = logger;
            _userStorage = userStorage;
        }

        public List<UserViewModel>? ReadList(UserSearchModel? model)
        {
            _logger.LogInformation("ReadList. UserFIO: {UserFIO}. Id: {Id} ", model?.UserFIO, model?.Id);
            var list = (model == null) ? _userStorage.GetFullList() : _userStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count: {Count}", list.Count);
            return list;
        }

        public UserViewModel? ReadElement(UserSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. User id: {Id}, User email: {Email}, User phone number: {PhoneNumber}, User password: {Password}", model?.Id, model?.Email, model?.PhoneNumber, model?.Password);
            var element = _userStorage.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(UserBindingModel model)
        {
            CheckModel(model);
            if (_userStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

        public bool Update(UserBindingModel model)
        {
            CheckModel(model);
            if (_userStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }

        public bool Delete(UserBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation("Delete. Id: {Id}", model.Id);
            if (_userStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }

        private void CheckModel(UserBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.UserFIO))
            {
                throw new ArgumentNullException("Нет ФИО пользователя", nameof(model.UserFIO));
            }
            if (string.IsNullOrEmpty(model.Email) || !Regex.IsMatch(model.Email, @"^[a-z0-9._%+-]+\@([a-z0-9-]+\.)+[a-z]{2,4}$"))
            {
                throw new ArgumentNullException("Некорректно введен логин(почта) пользователя", nameof(model.Email));
            }
            if (string.IsNullOrEmpty(model.PhoneNumber))
            {
                throw new ArgumentNullException("Нет номера телефона пользователя", nameof(model.PhoneNumber));
            }
            if (string.IsNullOrEmpty(model.Password) || model.Password.Length < 8 || model.Password.Length > 50)
            {
                throw new ArgumentNullException("Нет пароля пользователя", nameof(model.Password));
            }
            _logger.LogInformation("User. Id: {id}, FIO: {fio}, email: {email}, phone number: {PhoneNumber}, password: {password}", model.Id, model.UserFIO, model.Email, model.PhoneNumber,
                model.Password);
            var element = _userStorage.GetElement(new UserSearchModel
            {
                Email = model.Email,
                PhoneNumber = model.PhoneNumber,
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Пользователь с таким логином(почтой) или номером телефона уже есть");
            }
        }
    }
}