using ProjectMonorail.Scripts.Monorail.Drawnings;
using ProjectMonorail.Scripts.Monorail.MovementStrategy;

namespace ProjectMonorail
{
    /// <summary>
    /// Форма работы с объектом "Монорельс"
    /// </summary>
    public partial class FormMonorail : Form
    {
        /// <summary>
        /// Поле-объект для прорисовки объекта
        /// </summary>
        private DrawingMonorail? _drawningMonorail;

        /// <summary>
        /// Стратегия перемещения
        /// </summary>
        private AbstractStrategy? _strategy;

        public DrawingMonorail SetMonorail
        {
            set
            {
                _drawningMonorail = value;
                _drawningMonorail.SetPictureSize(pictureBoxMonorail.Width, pictureBoxMonorail.Height);
                Random random = new Random();
                _drawningMonorail.SetPosition(random.Next(0, 100), random.Next(0, 100));
                comboBoxStrategy.Enabled = true;
                _strategy = null;
                Draw();
            }
        }

        /// <summary>
        /// Конструктор формы
        /// </summary>
        public FormMonorail()
        {
            InitializeComponent();
            _strategy = null;
        }

        /// <summary>
        /// Метод для прорисовки автомобиля
        /// </summary>
        private void Draw()
        {
            if (_drawningMonorail == null) return;

            Bitmap bmp = new(pictureBoxMonorail.Width, pictureBoxMonorail.Height);
            Graphics gr = Graphics.FromImage(bmp);
            _drawningMonorail.DrawTransport(gr);
            pictureBoxMonorail.Image = bmp;
        }

        /// <summary>
        /// Обработка кнопок перемешения
        /// </summary>
        private void ButtonMove_Click(object sender, EventArgs e)
        {
            if (_drawningMonorail == null) return;

            string name = ((Button)sender).Name ?? string.Empty;
            bool result = false;
            switch (name)
            {
                case "buttonMove_Up":
                    result = _drawningMonorail.MoveTransport(DirectionType.Up);
                    break;
                case "buttonMove_Down":
                    result = _drawningMonorail.MoveTransport(DirectionType.Down);
                    break;
                case "buttonMove_Right":
                    result = _drawningMonorail.MoveTransport(DirectionType.Right);
                    break;
                case "buttonMove_Left":
                    result = _drawningMonorail.MoveTransport(DirectionType.Left);
                    break;
            }

            if (result) Draw();
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void buttonStrategyStep_Click(object sender, EventArgs e)
        {
            if (_drawningMonorail == null) return;

            if (comboBoxStrategy.Enabled)
            {
                _strategy = comboBoxStrategy.SelectedIndex switch
                {
                    0 => new MoveToCenter(),
                    1 => new MoveToRightDownBorder(),
                    _ => null,
                };
                if (_strategy == null)
                {
                    return;
                }
                _strategy.SetData(new MoveableMonorail(_drawningMonorail), pictureBoxMonorail.Width, pictureBoxMonorail.Height);
            }

            if (_strategy == null)
            {
                return;
            }

            comboBoxStrategy.Enabled = false;
            _strategy.MakeStep();
            Draw();

            if (_strategy.GetStatus() == StrategyStatus.Finish)
            {
                comboBoxStrategy.Enabled = true;
                _strategy = null;
            } 
        }
    }
}