/**
 * Copyright (c) 2001-2017 Mathew A. Nelson and Robocode contributors
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://robocode.sourceforge.net/license/epl-v10.html
 */
package net.sf.robocode.ui.dialog;


import net.sf.robocode.battle.IBattleManager;
import net.sf.robocode.ui.IRobotDialogManager;
import net.sf.robocode.ui.IWindowManager;
import net.sf.robocode.ui.IWindowManagerExt;
import robocode.BattleResults;
import robocode.control.events.BattleAdaptor;
import robocode.control.events.BattleCompletedEvent;
import robocode.control.events.BattleFinishedEvent;
import robocode.control.events.TurnEndedEvent;
import robocode.control.snapshot.IRobotSnapshot;
import robocode.control.snapshot.IScoreSnapshot;
import robocode.control.snapshot.ITurnSnapshot;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;


/**
 * @author Mathew A. Nelson (original)
 * @author Flemming N. Larsen (contributor)
 */
@SuppressWarnings("serial")
public class RobotButton extends JButton implements ActionListener {

	private static final int BAR_MARGIN = 2;
	private static final int BAR_HEIGHT = 3;

	private final IWindowManagerExt windowManager;
	private final IBattleManager battleManager;
	private final BattleObserver battleObserver = new BattleObserver();
	private final IRobotDialogManager dialogManager;
	private RobotDialog robotDialog;
	private String name;
	private int robotIndex;
	private int contestantIndex;
	private int maxEnergy = 1;
	private int maxScore = 1;
	private int lastEnergy;
	private int lastScore;
	private boolean isListening;

	public RobotButton(IWindowManager windowManager, IBattleManager battleManager, IRobotDialogManager dialogManager) {
		this.windowManager = (IWindowManagerExt) windowManager;
		this.battleManager = battleManager;
		this.dialogManager = dialogManager;
	}

	public void setup(String name, int maxEnergy, int robotIndex, int contestantIndex, boolean attach) {
		this.name = name;
		this.robotIndex = robotIndex;
		this.contestantIndex = contestantIndex;
		this.lastEnergy = maxEnergy;
		this.maxEnergy = maxEnergy;
		initialize();
		if (attach) {
			attach();
			robotDialog.reset();
			battleManager.setPaintEnabled(robotIndex, robotDialog.isPaintEnabled());
			battleManager.setSGPaintEnabled(robotIndex, robotDialog.isSGPaintEnabled());
		}
	}

	public void actionPerformed(ActionEvent e) {
		if (robotDialog == null) {
			attach();
			if (!robotDialog.isVisible() || robotDialog.getState() != Frame.NORMAL) {
				WindowUtil.packPlaceShow(robotDialog);
			}
		} else {
			robotDialog.setVisible(true);
		}
	}

	@Override
	public void paint(Graphics g) {
		super.paint(g);

		Graphics2D g2 = (Graphics2D) g;

		final int barMaxWidth = getWidth() - (2 * BAR_MARGIN);

		g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.75f));

		if (lastEnergy > 0) {
			Color color;

			if (lastEnergy > 50) {
				color = Color.GREEN;
			} else if (lastEnergy > 25) {
				color = Color.YELLOW;
			} else {
				color = Color.RED;
			}
			g.setColor(color);

			final int widthLife = Math.max(Math.min(barMaxWidth * lastEnergy / maxEnergy, barMaxWidth), 0);

			g.fillRect(BAR_MARGIN, getHeight() - (2 * BAR_HEIGHT + BAR_MARGIN), widthLife, BAR_HEIGHT);
		}
		if (lastScore > 0) {
			g.setColor(Color.BLUE);

			final int widthScore = Math.max(Math.min(barMaxWidth * lastScore / maxScore, barMaxWidth), 0);

			g.fillRect(BAR_MARGIN, getHeight() - (BAR_HEIGHT + BAR_MARGIN), widthScore, BAR_HEIGHT);
		}
	}

	/**
	 * Initialize the class.
	 */
	private void initialize() {
		addActionListener(this);
		setPreferredSize(new Dimension(110, 25));
		setMinimumSize(new Dimension(110, 25));
		setMaximumSize(new Dimension(110, 25));
		setHorizontalAlignment(SwingConstants.LEFT);
		setMargin(new Insets(0, 0, 0, 0));
		setToolTipText(name);
	}

	public void attach() {
		if (!isListening) {
			isListening = true;
			windowManager.addBattleListener(battleObserver);
		}
		if (robotDialog == null) {
			robotDialog = dialogManager.getRobotDialog(this, name, true);
		}
		robotDialog.attach(this);
	}

	public void detach() {
		if (isListening) {
			windowManager.removeBattleListener(battleObserver);
			isListening = false;
		}
		if (robotDialog != null) {
			final RobotDialog dialog = robotDialog;

			robotDialog = null;
			dialog.detach();
		}
	}

	public int getRobotIndex() {
		return robotIndex;
	}

	public String getRobotName() {
		return name;
	}

	private class BattleObserver extends BattleAdaptor {

		@Override
		public void onTurnEnded(TurnEndedEvent event) {
			final ITurnSnapshot turn = event.getTurnSnapshot();

			if (turn == null) {
				return;
			}
			final IRobotSnapshot[] robots = turn.getRobots();
			final IScoreSnapshot[] scoreSnapshotList = event.getTurnSnapshot().getIndexedTeamScores();

			maxEnergy = 0;
			for (IRobotSnapshot robot : robots) {
				if (maxEnergy < robot.getEnergy()) {
					maxEnergy = (int) robot.getEnergy();
				}
			}
			if (maxEnergy == 0) {
				maxEnergy = 1;
			}

			maxScore = 0;
			for (IScoreSnapshot team : scoreSnapshotList) {
				if (maxScore < team.getCurrentScore()) {
					maxScore = (int) team.getCurrentScore();
				}
			}
			if (maxScore == 0) {
				maxScore = 1;
			}

			final int newScore = (int) scoreSnapshotList[contestantIndex].getCurrentScore();
			final int newEnergy = (int) robots[robotIndex].getEnergy();
			boolean rep = (lastEnergy != newEnergy || lastScore != newScore);

			lastEnergy = newEnergy;
			lastScore = newScore;
			if (rep) {
				repaint();
			}
		}

		public void onBattleCompleted(final BattleCompletedEvent event) {
			maxScore = 0;
			for (BattleResults team : event.getIndexedResults()) {
				if (maxScore < team.getScore()) {
					maxScore = team.getScore();
				}
			}
			if (maxScore == 0) {
				maxScore = 1;
			}
			lastScore = event.getIndexedResults()[contestantIndex].getScore();
			repaint();
		}
		
		public void onBattleFinished(final BattleFinishedEvent event) {
			lastEnergy = 0;
			repaint();
		}
	}
}
