using ElectronicsShopContracts.BindingModels;
using ElectronicsShopContracts.BusinessLogicContracts;
using ElectronicsShopContracts.SearchModels;
using ElectronicsShopContracts.ViewModels;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Data;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;

namespace ElectronicsShopBusinessLogic.BusinessLogic
{
    public class ClientLogic : IUserLogic
    {
        private readonly ILogger _logger;
        //private readonly IClientStorage _storage;

        // todo нет интерфейса хранилища  
        public UserLogic(ILogger<UserLogic> logger) {
            _logger = logger;
            //storage = _storage;
        }

        public bool Add(UserBindingModel model)
        {
            CheckModel(model);
            // todo логика добавления в _clientStorage:_clientStorage.Insert(model) == null
            if (model == null) {
                _logger.LogWarning("Add operation failed");
                return false;
            }
            return true;
        }

        public bool Update(UserBindingModel model)
        {
            CheckModel(model);
            // todo логика добавления в _clientStorage:_clientStorage.Update(model) == null
            if (model == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }

        public bool Delete(UserBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation($"Delete.ID:{model.UserID}");
            // todo логика добавления в _clientStorage:_clientStorage.Delete(model) == null
            if (model == null) {
                _logger.LogWarning("Delete operation failes");
                return false;
            }
            return true;

        }

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

        public List<UserViewModel>? ReadList(UserSearchModel? model)
        {
            
            _logger.LogInformation($"ReadList: ClientID:{model?.UserID}");
            // todo получение списка из хранилища,  model == null ? _clientStorage.GetFullList() : _clientStorage.GetFilteredList(model);
            var list = model;
            if (list == null) {
                _logger.LogWarning("ReadList: return null list");
                return null;
            }
            // toto ReadList:Count:{list.count}, 
            _logger.LogInformation("ReadList:Count:{Count}");
            // todo return list;
            return null;
        }

        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. Login:{model.Login}.FirstName:{model.FirstName}.LastName:{model.LastName}.Email:{model.Email}." +
                                    $"Password:{model.Password}.PhoneNumber:{model.PhoneNumber}");
            /*
            var element = _clientStorage.GetElement(new ClientSearchModel
			{
				Login = model.Login
			});
			if (element != null && element.Id != model.ID)
			{
				throw new InvalidOperationException("Клиент с таким логином уже есть");
			}
            */
        }
    }
}