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

namespace Turtle
{
    public partial class MainForm : Form
    {
        public Canvas Canvas { get; private set; }

        public MainForm()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            using (OpenFileDialog dialog = new OpenFileDialog())
            {
                if (dialog.ShowDialog() == DialogResult.OK)
                {
                    Run(dialog.FileName, Convert.ToInt32(stepCountBox.Value));
                }
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            using (SaveFileDialog dialog = new SaveFileDialog())
            {
                dialog.DefaultExt = "png";
                dialog.Filter = "Obrázek PNG|*.png|Obrázek GIF|*.gif|Obrázek BMP|*.bmp|Všechny soubory (*.*)|*.*";
                if (dialog.ShowDialog() == DialogResult.OK)
                {
                    Save(dialog.FileName);
                }
            }
        }

        private void Run(string path, int stepCount)
        {
            Canvas = new Canvas();
            Canvas.MaxStepCount = stepCount;


            using (Parser parser = new Parser(path))
            {
                Token t;

                while ((t = parser.FetchToken()) != null)
                {
                    // function call
                    if (t.Type == TokenType.String)
                    {
                        string name = t.Text;

                        while ((t = parser.FetchToken()) != null)
                        {
                            if (t.Type == TokenType.RightBracket) break;

                            if (t.Type == TokenType.Number)
                            {
                                Canvas.Execute(name, t.Value);
                                break;
                            }
                        }
                    }
                }
            }

            pictureBox1.Image = Canvas.Image;
        }

        private void Save(string path)
        {
            if (Canvas.Image == null)
            {
                MessageBox.Show("Musíš vybrat soubor!");
                return;
            }

            Canvas.Image.Save(path);
        }
    }
}