using CanteenContracts.BindingModels;
using CanteenContracts.BusinessLogicsContracts;
using CanteenContracts.SearchModel;
using CanteenContracts.StoragesContracts;
using CanteenContracts.View;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CanteenBusinessLogic.BusinessLogics
{
    public class VisitorLogic : IVisitorLogic
    {
        private readonly ILogger _logger;
        private readonly IVisitorStorage _visitorStorage;

        public VisitorLogic(ILogger<VisitorLogic> logger, IVisitorStorage visitorStorage)
        {
            _logger = logger;
            _visitorStorage = visitorStorage;
        }

        public bool Create(VisitorBindingModel model)
        {
            CheckModel(model);

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

            return true;
        }

        public bool Delete(VisitorBindingModel model)
        {
            CheckModel(model, false);

            _logger.LogInformation("Delete. Id: {Id}", model.Id);
            if (_visitorStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }

            return true;
        }

        public VisitorViewModel? ReadElement(VisitorSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }

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

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

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

        public List<VisitorViewModel>? ReadList(VisitorSearchModel? model)
        {
            _logger.LogInformation("ReadList. Login: {Login}. Id: {Id}", model.Login, model.Id);

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

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

        public bool Update(VisitorBindingModel model)
        {
            CheckModel(model);

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

            return true;
        }
        private void CheckModel(VisitorBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }

            if (!withParams)
            {
                return;
            }

            if (string.IsNullOrEmpty(model.FIO))
            {
                throw new ArgumentNullException("Нет ФИО у посетителя", nameof(model.FIO));
            }

            if (string.IsNullOrEmpty(model.Login))
            {
                throw new ArgumentNullException("Нет логина у посетителя", nameof(model.Login));
            }

            if (string.IsNullOrEmpty(model.Password))
            {
                throw new ArgumentNullException("Нет пароля у посетителя", nameof(model.Password));
            }

            if (string.IsNullOrEmpty(model.PhoneNumber))
            {
                throw new ArgumentNullException("У номер телефона у посетителя", nameof(model.PhoneNumber));
            }

            _logger.LogInformation("Visitor. Login: {Login}. Password: {Password}. PhoneNumber: {PhoneNumber}. Id: {Id}", model.Login, model.Password, model.PhoneNumber, model.Id);

            var element = _visitorStorage.GetElement(new VisitorSearchModel { Login = model.Login, Password = model.Password });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Такой посетитель уже есть");
            }
        }
    }
}