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

namespace AircraftPlantBusinessLogic.BusinessLogics
{
    /// <summary>
    /// Реализация интерфейса бизнес-логики для клиентов
    /// </summary>
    public class ClientLogic : IClientLogic
    {
        /// <summary>
        /// Логгер
        /// </summary>
        private readonly ILogger _logger;

        /// <summary>
        /// Взаимодействие с хранилищем клиентов
        /// </summary>
        private readonly IClientStorage _clientStorage;

        /// <summary>
        /// Конструктор
        /// </summary>
        /// <param name="logger"></param>
        /// <param name="clientStorage"></param>
        public ClientLogic(ILogger<ClientLogic> logger, IClientStorage clientStorage)
        {
            _logger = logger;
            _clientStorage = clientStorage;
        }

        /// <summary>
        /// Получение списка
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public List<ClientViewModel>? ReadList(ClientSearchModel? model)
        {
            _logger.LogInformation("ReadList. ClientEmail:{Email}.Id:{ Id}", model?.Email, model?.Id);

            var list = model == null ? _clientStorage.GetFullList() : _clientStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }

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

        /// <summary>
        /// Получение отдельной записи
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        /// <exception cref="ArgumentNullException"></exception>
        public ClientViewModel? ReadElement(ClientSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }

            _logger.LogInformation("ReadElement. ClientEmail:{Email}.Id:{ Id}", model.Email, model.Id);

            var element = _clientStorage.GetElement(model);
            if (element == null)
            {
                _logger.LogWarning("ReadElement element not found");
                return null;
            }

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

        /// <summary>
        /// Создание записи
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public bool Create(ClientBindingModel model)
        {
            CheckModel(model);

            if (_clientStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

        /// <summary>
        /// Изменение записи
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public bool Update(ClientBindingModel model)
        {
            CheckModel(model);

            if (_clientStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }

        /// <summary>
        /// Удаление записи
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public bool Delete(ClientBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation("Delete. Id:{Id}", model.Id);

            if (_clientStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }

        /// <summary>
        /// Проверка модели компонента
        /// </summary>
        /// <param name="model"></param>
        /// <param name="withParams"></param>
        private void CheckModel(ClientBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.ClientFIO))
            {
                throw new ArgumentNullException("Нет ФИО клиента", nameof(model.ClientFIO));
            }
            if (string.IsNullOrEmpty(model.Email))
            {
                throw new ArgumentNullException("Нет почты клиента", nameof(model.Email));
            }
            if (string.IsNullOrEmpty(model.Password))
            {
                throw new ArgumentNullException("Нет пароля клиента", nameof(model.Password));
            }

            _logger.LogInformation("Client. ClientFIO: {ClientFIO}. Email: {Email}. Id: {Id}", model.ClientFIO, model.Email, model.Id);
            var element = _clientStorage.GetElement(new ClientSearchModel
            {
                Email = model.Email
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Клиент с такой почтой уже есть");
            }
        }
    }
}