using ElectronicsShopContracts.BindingModels;
using ElectronicsShopContracts.BusinessLogicContracts;
using ElectronicsShopContracts.SearchModels;
using ElectronicsShopContracts.StorageContracts;
using ElectronicsShopContracts.ViewModels;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ElectronicsShopBusinessLogic.BusinessLogic
{
    internal class UserLogic : IUserLogic
    {
        private readonly ILogger _logger;
        private readonly IUserStorage _storage;

        public UserLogic(ILogger<UserLogic> logger, IUserStorage storage)
        {
            _logger = logger;
            _storage = storage;
        }

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

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

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

        }

        public UserViewModel? ReadElemet(UserSearchModel? model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation($"ReadElement.Login:{model.Login}.ID:{model.ID}");
            var element  = _storage.GetElement(model); 
            if (element == null)
            {
                _logger.LogWarning("ReadElement. element not fount");
                return null;
            }
            _logger.LogInformation($"ReadElement.find.ID:{element.ID}");
            return element;
        }

        public List<UserViewModel>? ReadList(UserSearchModel? model)
        {

            _logger.LogInformation($"ReadList. ClientID:{model?.ID}");
            var list = model  == null ? _storage.GetFullList() : _storage.GetFilteredList(model); ;
            if (list == null)
            {
                _logger.LogWarning("ReadList. return null list");
                return null;
            }
            _logger.LogInformation($"ReadList.Count:{list.Count}");
            return list;
        }

        private void CheckModel(UserBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.Login))
            {
                throw new ArgumentNullException("Нет логина пользователя", nameof(model.Login));
            }
            if (string.IsNullOrEmpty(model.FirstName))
            {
                throw new ArgumentNullException("Нет имени пользователя", nameof(model.FirstName));
            }
            if (string.IsNullOrEmpty(model.LastName))
            {
                throw new ArgumentNullException("Нет фамилии пользоватея", nameof(model.LastName));
            }
            if (string.IsNullOrEmpty(model.Email))
            {
                throw new ArgumentNullException("Нет почты клиента", nameof(model.Email));
            }
            if (string.IsNullOrEmpty(model.Password))
            {
                throw new ArgumentNullException("Нет пароля пользователя", nameof(model.Password));
            }
            if (string.IsNullOrEmpty(model.PhoneNumber))
            {
                throw new ArgumentNullException("Нет номер телефона пользователя", nameof(model.PhoneNumber));
            }
            _logger.LogInformation($"Client. ID:{model.ID}.RoleID:{model.RoleID}.FirstName:{model.FirstName}." +
                                    $"LastName:{model.LastName}.Password:{model.Password}.PhoneNumber:{model.PhoneNumber}.Login:{model.Login}." +
                                    $"Email:{model.Email}");
            
            var element = _storage.GetElement(new UserSearchModel
			{
				Login = model.Login
			});
			if (element != null && element.Login != model.Login)
			{
				throw new InvalidOperationException("Клиент с таким логином уже есть");
			}
            
        }
    }
}