using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace ElectricLocomotive {
    public partial class FormLocoConfig : Form {
        DrawingLocomotiv? _loco = null;
        private event Action<DrawingLocomotiv>? EventAddLoco;
        public void AddEvent(Action<DrawingLocomotiv> ev) {
            if (EventAddLoco == null) {
                EventAddLoco = ev;
            }
            else {
                EventAddLoco += ev;
            }
        }
        public FormLocoConfig() {
            InitializeComponent();
            panelBlack.MouseDown += PanelColor_MouseDown;
            panelGreen.MouseDown += PanelColor_MouseDown;
            panelRed.MouseDown += PanelColor_MouseDown;
            panelBlue.MouseDown += PanelColor_MouseDown;
            panelGray.MouseDown += PanelColor_MouseDown;
            panelYellow.MouseDown += PanelColor_MouseDown;
            panelPurple.MouseDown += PanelColor_MouseDown;
            panelWhite.MouseDown += PanelColor_MouseDown;
            labelSimple.MouseDown += LabelObject_MouseDown;
            labelAdvanced.MouseDown += LabelObject_MouseDown;
            buttonCancel.Click += (s, e) => Close();
        }
        private void PanelColor_MouseDown(object sender, MouseEventArgs e) {
            (sender as Panel)?.DoDragDrop((sender as Panel)?.BackColor,
DragDropEffects.Move | DragDropEffects.Copy);
        }
        private void LabelObject_MouseDown(object sender, MouseEventArgs e) {
            (sender as Label)?.DoDragDrop((sender as Label)?.Name, DragDropEffects.Move | DragDropEffects.Copy);
        }
        private void DrawLoco() {
            Bitmap bmp = new(pictureBox.Width, pictureBox.Height);
            Graphics gr = Graphics.FromImage(bmp);
            _loco?.SetPosition(5, 5);
            _loco?.DrawLoco(gr);
            pictureBox.Image = bmp;
        }


        private void labelSimple_MouseDown(object sender, MouseEventArgs e) {
            (sender as Label)?.DoDragDrop((sender as Label)?.Name,
                DragDropEffects.Move | DragDropEffects.Copy);
        }

        private void rightPanel_DragEnter(object sender, DragEventArgs e) {

            if (e.Data?.GetDataPresent(DataFormats.Text) ?? false) {
                e.Effect = DragDropEffects.Copy;
            }
            else {
                e.Effect = DragDropEffects.None;
            }
        }

        private void rightPanel_DragDrop(object sender, DragEventArgs e) {
            switch (e.Data?.GetData(DataFormats.Text).ToString()) {
                case "labelSimple":
                    _loco = new DrawingLocomotiv((int)numericUpDownSpeed.Value,
                        (int)numericUpDownWeight.Value, pictureBox.Width,
                        pictureBox.Height, Color.Black, Color.Yellow);
                    break;
                case "labelAdvanced":
                    _loco = new DrawingElectricLocomotiv(checkBoxRoga.Checked, checkBoxBattery.Checked,
                        (int)numericUpDownSpeed.Value, (int)numericUpDownWeight.Value, pictureBox.Width,
                        pictureBox.Height, Color.Black, Color.Yellow, Color.Aqua, Color.Black);
                    break;
            }
            labelColor.BackColor = Color.Empty;
            labelAddColor.BackColor = Color.Empty;
            DrawLoco();
        }

        private void buttonAdd_Click(object sender, EventArgs e) {
            EventAddLoco?.Invoke(_loco);
            Close();
        }
       
        
        private void labelColor_DragEnter(object sender, DragEventArgs e) {
            if (e.Data.GetDataPresent(typeof(Color))) {
                e.Effect = DragDropEffects.Copy;
            }
            else {
                e.Effect = DragDropEffects.None;
            }
        }

        private void labelColor_DragDrop(object sender, DragEventArgs e) {
            if (_loco == null)
                return;
            labelColor.BackColor = (Color)e.Data.GetData(typeof(Color));
            _loco.ChangeColor(labelColor.BackColor);
            DrawLoco();
        }

        private void labelAddColor_DragEnter(object sender, DragEventArgs e) {
            if (e.Data.GetDataPresent(typeof(Color))) {
                e.Effect = DragDropEffects.Copy;
            }
            else {
                e.Effect = DragDropEffects.None;
            }
        }

        private void labelAddColor_DragDrop(object sender, DragEventArgs e) {
            if ((_loco == null) || (_loco is DrawingElectricLocomotiv == false))
                return;
            labelAddColor.BackColor = (Color)e.Data.GetData(typeof(Color));
            ((DrawingElectricLocomotiv)_loco).ChangeAddColor(labelAddColor.BackColor);
            DrawLoco();
        }
    }
}