package dev.kske.chess.ui;

import java.awt.Color;
import java.awt.Graphics;

import javax.swing.JComponent;

import dev.kske.chess.board.Board;
import dev.kske.chess.io.TextureUtil;

/**
 * Project: <strong>Chess</strong><br>
 * File: <strong>BoardComponent.java</strong><br>
 * Created: <strong>01.07.2019</strong><br>
 * <br>
 * A square panel for rendering the chess board. To work correctly,
 * this must be added to a parent component that allows the child to decide the
 * size.
 *
 * @since Chess v0.1-alpha
 * @author Kai S. K. Engelbart
 */
public class BoardComponent extends JComponent {

	private static final long serialVersionUID = 6771148331334310216L;

	private final BoardPane boardPane;

	private Board board;

	/**
	 * Creates an instance of {@link BoardComponent}.
	 *
	 * @param boardPane the board pane inside which this board component is
	 *                  contained
	 */
	public BoardComponent(BoardPane boardPane) {
		this.boardPane = boardPane;
		setSize(boardPane.getPreferredSize());
	}

	@Override
	protected void paintComponent(Graphics g) {
		super.paintComponent(g);

		final int tileSize = boardPane.getTileSize();

		// Draw the board
		g.setColor(Color.white);
		for (int i = 0; i < 8; i++)
			for (int j = 0; j < 8; j++) {
				if (j > 0)
					g.setColor(
						g.getColor().equals(Color.white) ? Color.lightGray : Color.white
					);
				g.fillRect(tileSize * i, tileSize * j, tileSize, tileSize);
			}

		// Draw the pieces if a board is present
		if (board != null)
			for (int i = 0; i < 8; i++)
				for (int j = 0; j < 8; j++)
					if (board.getBoardArr()[i][j] != null)
						g.drawImage(
							TextureUtil
								.getPieceTexture(board.getBoardArr()[i][j]),
							i * tileSize,
							j * tileSize,
							this
						);
	}

	/**
	 * @return the board rendered by this board component
	 */
	public Board getBoard() { return board; }

	/**
	 * Sets the board rendered by this board component and repaints the
	 * component
	 *
	 * @param board the board rendered by this board component
	 */
	public void setBoard(Board board) {
		this.board = board;
		repaint();
	}
}