using AccountsContracts.BindingModels;
using AccountsContracts.BusinessLogicContracts;
using AccountsContracts.SearchModels;
using AccountsContracts.StorageContracts;
using AccountsContracts.ViewModels;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AccountsBusinessLogic.BusinessLogics
{
    public class AccountLogic : IAccountLogic
    {
        private readonly IAccountStorage _accountStorage;

        public AccountLogic(IAccountStorage accountStorage)
        {
            _accountStorage = accountStorage;
        }

        public List<AccountViewModel>? ReadList(AccountSearchModel? model)
        {
            var list = model == null ? _accountStorage.GetFullList() : _accountStorage.GetFilteredList(model);
            if (list == null)
            {
                return null;
            }
            return list;
        }

        public AccountViewModel? ReadElement(AccountSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            var element = _accountStorage.GetElement(model);
            if (element == null)
            {
                return null;
            }
            return element;
        }

        public bool Create(AccountBindingModel model)
        {
            CheckModel(model);
            if (_accountStorage.Insert(model) == null)
            {
                return false;
            }
            return true;
        }

        public bool Update(AccountBindingModel model)
        {
            CheckModel(model);
            if (_accountStorage.Update(model) == null)
            {
                return false;
            }
            return true;
        }
        public bool Delete(AccountBindingModel model)
        {
            CheckModel(model, false);
            if (_accountStorage.Delete(model) == null)
            {
                return false;
            }
            return true;
        }

        private void CheckModel(AccountBindingModel 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.Password))
            {
                throw new ArgumentNullException("Нет пароля пользователя", nameof(model.Password));
            }
            if (string.IsNullOrEmpty(model.Email))
            {
                throw new ArgumentNullException("Нет электронной почты пользователя", nameof(model.Email));
            }
        }
    }
}