using HotelContracts.BindingModels;
using HotelContracts.BusinessLogicsContracts;
using HotelContracts.SearchModels;
using HotelContracts.StoragesContracts;
using HotelContracts.ViewModels;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace HotelBusinessLogic.BusinessLogics
{
    public class PostLogic : IPostLogic
    {
        private readonly IPostStorage _postStorage;

        public PostLogic(IPostStorage postStorage)
        {
            _postStorage = postStorage;
        }
        public PostViewModel? ReadElement(PostSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }

            var element = _postStorage.GetElement(model);
            if (element == null)
            {
                return null;
            }
            return element;
        }

        public List<PostViewModel>? ReadList(PostSearchModel? model)
        {
            var list = model == null ? _postStorage.GetFullList() : _postStorage.GetFilteredList(model);
            if (list == null)
            {
                return null;
            }
            return list;
        }

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

        public bool Delete(PostBindingModel model)
        {
            CheckModel(model, false);
            if (_postStorage.Delete(model) == null)
            {
                return false;
            }
            return true;
        }

        public bool Update(PostBindingModel model)
        {
            CheckModel(model);
            if (_postStorage.Update(model) == null)
            {
                return false;
            }
            return true;
        }

        private void CheckModel(PostBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.PostName))
            {
                throw new ArgumentNullException("Нужно заполнить поле должности", nameof(model.PostName));
            }


        }
    }
}