using System;
using System.Windows.Forms;
using YourNamespace.Entities;
using YourNamespace.Repositories;

namespace YourNamespace.Forms
{
    public partial class FormFlight : Form
    {
        private readonly IFlightRepository _flightRepository;
        private readonly IPlaneRepository _planeRepository;
        private readonly IAirportRepository _airportRepository;
        private int? _flightId;

        public int Id
        {
            set
            {
                try
                {
                    var flight = _flightRepository.ReadFlightById(value);
                    if (flight == null)
                    {
                        throw new InvalidDataException(nameof(flight));
                    }
                    numericUpDownFlightNumber.Value = flight.FlightNumber;
                    dateTimePickerDeparture.Value = flight.DepartureDateTime;
                    dateTimePickerArrival.Value = flight.ArrivalDateTime;
                    comboBoxPlane.SelectedValue = flight.PlaneId;
                    comboBoxAirport.SelectedValue = flight.AirportId;
                    _flightId = value;
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message, "Ошибка при получении данных", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return;
                }
            }
        }

        public FormFlight(IFlightRepository flightRepository, IPlaneRepository planeRepository, IAirportRepository airportRepository)
        {
            InitializeComponent();
            _flightRepository = flightRepository ?? throw new ArgumentNullException(nameof(flightRepository));
            _planeRepository = planeRepository ?? throw new ArgumentNullException(nameof(planeRepository));
            _airportRepository = airportRepository ?? throw new ArgumentNullException(nameof(airportRepository));

            comboBoxPlane.DataSource = _planeRepository.ReadPlanes();
            comboBoxPlane.DisplayMember = "Model";
            comboBoxPlane.ValueMember = "Id";

            comboBoxAirport.DataSource = _airportRepository.ReadAirports();
            comboBoxAirport.DisplayMember = "Name";
            comboBoxAirport.ValueMember = "Id";
        }

        private void ButtonSave_Click(object sender, EventArgs e)
        {
            try
            {
                if (comboBoxPlane.SelectedIndex < 0 || comboBoxAirport.SelectedIndex < 0)
                {
                    throw new Exception("Имеются незаполненные поля");
                }
                if (_flightId.HasValue)
                {
                    _flightRepository.UpdateFlight(CreateFlight(_flightId.Value));
                }
                else
                {
                    _flightRepository.CreateFlight(CreateFlight(0));
                }
                Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Ошибка при сохранении", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

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

        private Flight CreateFlight(int id) => Flight.CreateEntity(id, (int)numericUpDownFlightNumber.Value, dateTimePickerDeparture.Value, dateTimePickerArrival.Value, (int)comboBoxPlane.SelectedValue, (int)comboBoxAirport.SelectedValue);
    }
}