using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing;

namespace BilaPani
{
    public static class Vykreslovani
    {
        private static Size ROZMERYPLATNA = new Size(500, 500);
        static Size rozmeryPolicek;
        private static Graphics g;
        static BufferedGraphicsContext currentContext;
        static BufferedGraphics myBuffer;

        private static Color[,] MapaJakoBarvy;

        public static void Init(Graphics graphics)
        {
            rozmeryPolicek = new Size(ROZMERYPLATNA.Width / mapa.dataMapy.GetLength(0), ROZMERYPLATNA.Height / mapa.dataMapy.GetLength(1));
            MapaJakoBarvy = new Color[mapa.dataMapy.GetLength(0), mapa.dataMapy.GetLength(1)];
            PrevestMapuDoPoleBarev();
            g = graphics;
            currentContext = BufferedGraphicsManager.Current;
            myBuffer = currentContext.Allocate(g,new Rectangle(new Point(0,0),ROZMERYPLATNA));
        }

        public static void Vykreslit()
        {
            myBuffer.Graphics.Clear(Color.Gray);
            for (int y = 0; y < mapa.dataMapy.GetLength(1); y++)
            {
                for (int x = 0; x < mapa.dataMapy.GetLength(0); x++)
                {
                    myBuffer.Graphics.FillRectangle(new Pen(MapaJakoBarvy[x, y]).Brush, x * rozmeryPolicek.Width, y * rozmeryPolicek.Height, rozmeryPolicek.Width, rozmeryPolicek.Height);
                }
            }
            myBuffer.Render();
        }

        public static void VykreslitCisla(int[,] cisla)
        {
            for (int y = 0; y < cisla.GetLength(1); y++)
            {
                for (int x = 0; x < cisla.GetLength(0); x++)
                {
                    if (cisla[x, y] > 6400 || cisla[x, y] < 0)
                        continue;
                    myBuffer.Graphics.DrawString(cisla[x, y].ToString(), new Font(FontFamily.GenericSerif, 10), new Pen(Color.Orange).Brush, x * rozmeryPolicek.Width, y * rozmeryPolicek.Height);
                }
            }
            myBuffer.Render();
        }

        public static void PrevestMapuDoPoleBarev()
        {
            for (int y = 0; y < mapa.dataMapy.GetLength(1); y++)
            {
                for (int x = 0; x < mapa.dataMapy.GetLength(0); x++)
                {
                    MapaJakoBarvy[x, y] = ZiskatBarvuProPolicko(mapa.dataMapy[x, y]);
                }
            }
            MapaJakoBarvy[mapa.poziceCile.X, mapa.poziceCile.Y] = Color.Red;
        }

        private static Color ZiskatBarvuProPolicko(mapa.TypPole pole)
        {
            switch (pole)
            {
                case mapa.TypPole.BilaPani:
                    return Color.WhiteSmoke;
                case mapa.TypPole.Nic:
                    return Color.Gray;
                case mapa.TypPole.Televize:
                    return Color.Red;
                case mapa.TypPole.Zed:
                    return Color.Black;
                case mapa.TypPole.Zved:
                    return Color.Green;
                default:
                    return Color.White;
            }
        }
    }
}