using CarShowroomContracts.BusinessLogic;
using CarShowroomContracts.StorageContracts;
using CarShowroomDataModels.Dtos;
using CarShowroomDataModels.SearchModel;
using CarShowroomDataModels.Views;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CarShowroomBusinessLogic.BusinessLogic
{
    public class CarLogic : ICarLogic
    {
        private readonly ICarStorage _carStorage;

        public CarLogic(ICarStorage storage)
        {
            _carStorage = storage;
        }

        public List<CarView>? ReadList(CarSearch? model)
        {
            var list = model == null ? _carStorage.GetFullList() : _carStorage.GetFilteredList(model);
            if (list == null)
            {
                return null;
            }
            return list;
        }

        public CarView? ReadElement(CarSearch model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            var element = _carStorage.GetElement(model);
            if (element == null)
            {
                return null;
            }
            return element;
        }

        public bool Create(CarDto model)
        {
            model.IsSaled = false;
            CheckModel(model);
            if (_carStorage.Insert(model) == null)
            {
                return false;
            }
            return true;
        }

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

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

        private void CheckModel(CarDto model, bool withParams = true)
        {
            if (model == null)
                throw new ArgumentNullException(nameof(model));
            if (!withParams)
                return;
            if (model.ModelId < 0)
                throw new InvalidOperationException();
            if (string.IsNullOrEmpty(model.Color))
                throw new InvalidOperationException();
        }
    }
}