package javacodes.lightdraw;

import java.util.Map;
import java.util.TreeMap;

public class Window {

    /**
     * Key is row number Value is another map, whose key is column number, and
     * value is the character
     */
    private Map<Integer, Map<Integer, String>> screen = new TreeMap<Integer, Map<Integer, String>>();
    private static final int WINDOW_SIZE = 20;

    /**
     * Draw an empty screen, with pounds as chars
     */
    public void init() {
        for (int i = 0; i < WINDOW_SIZE; i++) {
            Map<Integer, String> row = new TreeMap<Integer, String>();
            for (int j = 0; j < WINDOW_SIZE; j++) {
                row.put(j, " ");
            }
            screen.put(i, row);
        }
    }

    public void render() {
        System.out.println("[Screen");
        System.out.println("  ------------------------------------------");

        for (int rowNumber : screen.keySet()) {
            Map<Integer, String> row = screen.get(rowNumber);
            System.out.print(" | ");

            for (int columnNumber : row.keySet()) {

                String pixel = row.get(columnNumber);
                System.out.print(pixel + " ");
            }
            System.out.print(" | ");

            System.out.println("");
        }

        System.out.println("  ------------------------------------------");
    }

    public void draw(int row, int col, String character) {
        if (row < 0 || row > WINDOW_SIZE - 1 || col < 0 || col > WINDOW_SIZE - 1) {
            throw new IllegalArgumentException("OUT OF BOUNDS KA BOY!");
        }
        this.screen.get(row).put(col, character);
    }

    public String getPixel(int row, int col) {
        if (row < 0 || row > WINDOW_SIZE - 1 || col < 0 || col > WINDOW_SIZE - 1) {
            throw new IllegalArgumentException("OUT OF BOUNDS KA BOY!");
        }
        return this.screen.get(row).get(col);
    }
}