using GasStation.Entities.Enums;
using GasStation.Repositories;
using GasStation.Entities;

namespace GasStation.Forms
{
    public partial class FormProduct : Form
    {

        private readonly IProductRepository _productRepository;

        private int? _productId;

        public FormProduct(IProductRepository productRepository)
        {
            InitializeComponent();
            _productRepository = productRepository ??
                throw new ArgumentNullException(nameof(productRepository));
            foreach (var elem in Enum.GetValues(typeof(Gasmen)))
            {
                checkedListBoxGasman.Items.Add(elem);
            }
        }

        public int ID
        {
            set
            {
                try
                {
                    var product = _productRepository.ReadProductByID(value);
                    if (product == null)
                    {
                        throw new InvalidDataException(nameof(product));
                    }

                    foreach(Gasmen elem in Enum.GetValues(typeof(Gasmen)))
                    {
                        if ((elem & product.Gasmen) != 0)
                        {
                            checkedListBoxGasman.SetItemChecked(checkedListBoxGasman.Items.IndexOf(elem), true);
                        }
                    }

                    checkedListBoxGasman.SelectedItem = product.Gasmen;
                    comboBoxProduct.SelectedItem = product.ProductType;
                    _productId = value;
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message, "Ошибка при получении данных", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return;
                }
            }
        }

        private void ButtonSave_Click(object sender, EventArgs e)
        {
            try
            {
                if (checkedListBoxGasman.CheckedItems.Count == 0)
                {
                    throw new Exception("Имеются незаполненые поля");
                }
                if (_productId.HasValue)
                {
                    _productRepository.UpdateProduct(CreateProduct(_productId.Value));
                }
                else
                {
                    _productRepository.CreateProduct(CreateProduct(0));
                }
                Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Ошибка при сохранении", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
        }

        private void ButtonCancel_Click(object sender, EventArgs e) => Close();

        private Product CreateProduct(int id)
        {
            Gasmen gasmen = Gasmen.None;
            foreach (var elem in checkedListBoxGasman.CheckedItems)
            {
                gasmen |= (Gasmen)elem;
            }
            return Product.CreateProduct(id, Convert.ToInt32(numericUpDownCost.Value), gasmen, (ProductType)comboBoxProduct.SelectedItem!);
        }
    }
}