/*
 *  Freeplane - mind map editor
 *  Copyright (C) 2008 Dimitry Polivaev
 *
 *  This file author is Dimitry Polivaev
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.freeplane.view.swing.map;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.Point;
import java.awt.RenderingHints;

import javax.swing.SwingConstants;

import org.freeplane.features.mode.ModeController;
import org.freeplane.features.nodelocation.LocationModel;

class RootMainView extends MainView {
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private String shape;

	
	public RootMainView(String shape) {
        super();
        setHorizontalAlignment(SwingConstants.CENTER);
    	this.shape = shape;
    }

    @Override
	public boolean dropAsSibling(final double xCoord) {
		return false;
	}

	/** @return true if should be on the left, false otherwise. */
	@Override
	public boolean dropLeft(final double xCoord) {
		return xCoord < getSize().width * 1 / 2;
	}


	@Override
    public
	Point getLeftPoint() {
		final Point in = new Point(0, getHeight() / 2);
		return in;
	}

	/*
	 * (non-Javadoc)
	 * @see freeplane.view.mindmapview.NodeView.MainView#getPreferredSize()
	 */
	@Override
	public Dimension getPreferredSize(int width) {
		final Dimension prefSize = super.getPreferredSize(width);
		if (isPreferredSizeSet()) {
			return prefSize;
		}
		prefSize.width *= 1.1;
		prefSize.height *= 2;
		return prefSize;
	}

	@Override
    public
	Point getRightPoint() {
		final Point in = getLeftPoint();
		in.x = getWidth() - 1;
		return in;
	}

	/*
	 * (non-Javadoc)
	 * @see freeplane.view.mindmapview.NodeView#getStyle()
	 */
	@Override
    public
	String getShape() {
		return shape;
	}

	void setShape(String shape) {
    	this.shape = shape;
    }

	@Override
	public void paintComponent(final Graphics graphics) {
		final Graphics2D g = (Graphics2D) graphics;
		if (getNodeView().getModel() == null) {
			return;
		}
		final ModeController modeController = getNodeView().getMap().getModeController();
		final Object renderingHint = modeController.getController().getViewController().setEdgesRenderingHint(g);
		paintBackgound(g);
		paintDragOver(g);
		g.setColor(Color.gray);
		g.setStroke(new BasicStroke(1.0f));
		g.drawOval(0, 0, getWidth() - 1, getHeight() - 1);
		g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, renderingHint);
		super.paintComponent(g);
	}

	@Override
	protected void paintBackground(final Graphics2D graphics, final Color color) {
		graphics.setColor(color);
		graphics.fillOval(1, 1, getWidth() - 2, getHeight() - 2);
	}

	@Override
	public void paintDragOver(final Graphics2D graphics) {
		final int draggedOver = getDraggedOver();
		if (draggedOver == NodeView.DRAGGED_OVER_SON) {
			graphics.setPaint(new GradientPaint(getWidth() / 4, 0, getNodeView().getMap().getBackground(),
			    getWidth() * 3 / 4, 0, NodeView.dragColor));
			graphics.fillRect(getWidth() / 4, 0, getWidth() - 1, getHeight() - 1);
		}
		else if (draggedOver == NodeView.DRAGGED_OVER_SON_LEFT) {
			graphics.setPaint(new GradientPaint(getWidth() * 3 / 4, 0, getNodeView().getMap().getBackground(),
			    getWidth() / 4, 0, NodeView.dragColor));
			graphics.fillRect(0, 0, getWidth() * 3 / 4, getHeight() - 1);
		}
	}

	@Override
	public void setDraggedOver(final Point p) {
		setDraggedOver((dropLeft(p.getX())) ? NodeView.DRAGGED_OVER_SON_LEFT : NodeView.DRAGGED_OVER_SON);
	}
	
    private static Insets insets = new Insets(4, 4, 4, 4);
    
    @Override
    public Insets getInsets() {
        return RootMainView.insets;
    }

    @Override
    public Insets getInsets(Insets insets) {
        return RootMainView.insets;
    }
    @Override
    public Point getConnectorPoint(Point p) {
            final MainView mainView = this;
            if (USE_COMMON_OUT_POINT_FOR_ROOT_NODE) {
                return super.getConnectorPoint(p);
            }
            final double nWidth = mainView.getWidth() / 2f;
            final double nHeight = mainView.getHeight() / 2f;
            int dx = Math.max(Math.abs(p.x -  mainView.getWidth()/2), getNodeView().getZoomed(LocationModel.HGAP));
            if(p.x < mainView.getWidth()/2)
            	dx = -dx;
			double angle = Math.atan((p.y - nHeight) / dx);
            if (dx < 0) {
                angle += Math.PI;
            }
            final Point out = new Point((int) ((1f + Math.cos(angle)) * nWidth), (int) ((1f + Math.sin(angle)) * nHeight));
            return out;
    }

	@Override
	public boolean isInDragRegion(Point p) {
		return false;
	}
}