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;
using System.IO;

namespace parkoviskoEvidencia
{
    public partial class Form1 : Form
    {
        // ZBYTOCNE VECI CO MI NEJDU Z NEJAKEHO DOVODU VYMAZAT, DEBUG PROSIM
        //private void parkoviskoPictureBox_LoadCompleted(object sender, AsyncCompletedEventArgs e)
        //{

        //}
        private void Form1_Load(object sender, EventArgs e)
        {

        }
        /// <summary>
        /// KONIEC DIVNEHO BUGU
        /// </summary>

        public Form1()
        {
            InitializeComponent();
        }

        private Parkovisko parkovisko = new Parkovisko();

        private void parkoviskoPictureBox_Paint(object sender, PaintEventArgs e)
        {
            parkovisko.Vykresli(e.Graphics);
        }

        private void parkoviskoPictureBox_MouseClick(object sender, MouseEventArgs e)
        {
            parkovisko.Klik(e.X, e.Y);
            parkoviskoPictureBox.Refresh();
        }

        private void ulozitButton_Click(object sender, EventArgs e)
        {
            DialogResult vysledok = parkoviskoSaveFileDialog.ShowDialog();
            if (vysledok == DialogResult.OK)
            {
                try
                {
                    parkovisko.Uloz(parkoviskoSaveFileDialog.FileName);
                }
                catch (Exception ex)
                {
                    MessageBox.Show("Súbor sa nepodarilo uložiť.", "Chyba", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }

        private void nacitatButton_Click(object sender, EventArgs e)
        {
            DialogResult vysledok = parkoviskoOpenFileDialog.ShowDialog();
            if (vysledok == DialogResult.OK)
            {
                try
                {
                    parkovisko.Nacitaj(parkoviskoOpenFileDialog.FileName);
                }
                catch (Exception ex)
                {
                    MessageBox.Show("Súbor sa nepodarilo načítať.", "Chyba", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }
    }

    class Parkovisko
    {
        private bool[,] miesta = new bool[30, 15];
        private const int velkost = 16;
        private const int medzera = 2;

        public void Vykresli(Graphics g)
        {
            Brush brush;
            for (int j = 0; j < miesta.GetLength(1); j++)
            {
                for (int i = 0; i < miesta.GetLength(0); i++)
                {
                    if (miesta[i, j])
                        brush = Brushes.Red;
                    else
                        brush = Brushes.Green;
                    g.FillRectangle(brush, i * (velkost + medzera), j * (velkost + medzera), velkost, velkost);
                }
            }
        }

        public void PrepniStav(int x, int y)
        {
            miesta[x, y] = !miesta[x, y];
        }

        public void Klik(int x, int y)
        {
            int px = x / (velkost + medzera);
            int py = y / (velkost + medzera);
            if (px < miesta.GetLength(0) && py < miesta.GetLength(1))
                PrepniStav(px, py);
        }

        public void Uloz(string cesta)
        {
            using (StreamWriter sw = new StreamWriter(cesta))
            {
                int obsadene = 0;
                for (int j = 0; j < miesta.GetLength(1); j++)
                {
                    string riadok = "";
                    for (int i = 0; i < miesta.GetLength(0); i++)
                    {
                        if (miesta[i, j])
                        {
                            riadok += "1";
                            obsadene++;
                        }
                        else
                            riadok += "0";
                    }
                    sw.Write(riadok + Environment.NewLine);
                    sw.Flush();
                }
                //sw.Write("Volných: {0}" + Environment.NewLine, miesta.Length - obsadene);
                //sw.Write("Obsadených: {0}" + Environment.NewLine, obsadene);
            }
        }

        public void Nacitaj(string cesta)
        {
            using (StreamReader sr = new StreamReader(cesta))
            {
                for (int j = 0; j < miesta.GetLength(0); j++)
                {
                    string riadok = sr.ReadLine();
                    for (int i = 0; i < miesta.GetLength(1); i++)
                    {
                        if (riadok[i] == '1')
                            miesta[i, j] = true;
                        else
                            miesta[i, j] = false;
                    }
                }
            }
        }
    }
}