/* ====================================================================
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
   the License.  You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
==================================================================== */

package org.apache.poi.xdgf.usermodel.section.geometry;

import org.apache.poi.POIXMLException;
import org.apache.poi.xdgf.usermodel.XDGFCell;
import org.apache.poi.xdgf.usermodel.XDGFShape;

import com.microsoft.schemas.office.visio.x2012.main.CellType;
import com.microsoft.schemas.office.visio.x2012.main.RowType;

/**
 * Contains x- and y-coordinates for a spline's control point and a spline's
 * knot.
 */
public class SplineKnot implements GeometryRow {

    SplineKnot _master = null;

    // The x-coordinate of a control point.
    Double x = null;

    // The y-coordinate of a control point.
    Double y = null;

    // One of the spline's knots (other than the last one or the first two).
    Double a = null;

    Boolean deleted = null;

    // TODO: support formulas

    public SplineKnot(RowType row) {

        if (row.isSetDel())
            deleted = row.getDel();

        for (CellType cell : row.getCellArray()) {
            String cellName = cell.getN();

            if (cellName.equals("X")) {
                x = XDGFCell.parseDoubleValue(cell);
            } else if (cellName.equals("Y")) {
                y = XDGFCell.parseDoubleValue(cell);
            } else if (cellName.equals("A")) {
                a = XDGFCell.parseDoubleValue(cell);
            } else {
                throw new POIXMLException("Invalid cell '" + cellName
                        + "' in SplineKnot row");
            }
        }
    }

    public boolean getDel() {
        if (deleted != null)
            return deleted;

        if (_master != null)
            return _master.getDel();

        return false;
    }

    public Double getX() {
        return x == null ? _master.x : x;
    }

    public Double getY() {
        return y == null ? _master.y : y;
    }

    public Double getA() {
        return a == null ? _master.a : a;
    }

    @Override
    public void setupMaster(GeometryRow row) {
        _master = (SplineKnot) row;
    }

    @Override
    public void addToPath(java.awt.geom.Path2D.Double path, XDGFShape parent) {
        throw new POIXMLException("Error: Use SplineRenderer!");
    }

    @Override
    public String toString() {
        return "{SplineKnot x=" + getX() + " y=" + getY() + " a=" + getA()
                + "}";
    }
}