/*
 * 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.pdfbox.pdmodel.interactive.annotation;

import org.apache.pdfbox.cos.COSDictionary;
import org.apache.pdfbox.cos.COSArray;
import org.apache.pdfbox.cos.COSInteger;
import org.apache.pdfbox.cos.COSName;

import org.apache.pdfbox.pdmodel.common.COSObjectable;
import org.apache.pdfbox.pdmodel.graphics.PDLineDashPattern;

/**
 * This class represents a PDF /BS entry the border style dictionary.
 *
 * @author Paul King
 */
public class PDBorderStyleDictionary implements COSObjectable
{

    /*
     * The various values of the style for the border as defined in the PDF 1.6 reference Table 8.13
     */

    /**
     * Constant for the name of a solid style.
     */
    public static final String STYLE_SOLID = "S";

    /**
     * Constant for the name of a dashed style.
     */
    public static final String STYLE_DASHED = "D";

    /**
     * Constant for the name of a beveled style.
     */
    public static final String STYLE_BEVELED = "B";

    /**
     * Constant for the name of a inset style.
     */
    public static final String STYLE_INSET = "I";

    /**
     * Constant for the name of a underline style.
     */
    public static final String STYLE_UNDERLINE = "U";

    private final COSDictionary dictionary;

    /**
     * Constructor.
     */
    public PDBorderStyleDictionary()
    {
        dictionary = new COSDictionary();
    }

    /**
     * Constructor.
     *
     * @param dict a border style dictionary.
     */
    public PDBorderStyleDictionary(COSDictionary dict)
    {
        dictionary = dict;
    }

    /**
     * returns the dictionary.
     *
     * @return the dictionary
     */
    @Override
    public COSDictionary getCOSObject()
    {
        return dictionary;
    }

    /**
     * This will set the border width in points, 0 = no border.
     *
     * There is a bug in Adobe Reader DC, float values are ignored for text field widgets. As a
     * workaround, floats that are integers (e.g. 2.0) are written as integer in the PDF.
     * <p>
     * In Adobe Acrobat DC, the values are shown as "0 = Invisible, 1 = Thin, 2 = Medium, 3 = Thick"
     * for widget and link annotations.
     *
     * @param w float the width in points
     */
    public void setWidth(float w)
    {
        // PDFBOX-3929 workaround 
        if (w == (int) w)
        {
            getCOSObject().setInt(COSName.W, (int) w);
        }
        else
        {
            getCOSObject().setFloat(COSName.W, w);
        }
    }

    /**
     * This will retrieve the border width in points, 0 = no border.
     *
     * @return The width of the border in points.
     */
    public float getWidth()
    {
        if (getCOSObject().getDictionaryObject(COSName.W) instanceof COSName)
        {
            // replicate Adobe behavior although it contradicts the specification
            // https://github.com/mozilla/pdf.js/issues/10385
            return 0;
        }
        return getCOSObject().getFloat(COSName.W, 1);
    }

    /**
     * This will set the border style, see the STYLE_* constants for valid values.
     *
     * @param s the border style to use
     */
    public void setStyle(String s)
    {
        getCOSObject().setName(COSName.S, s);
    }

    /**
     * This will retrieve the border style, see the STYLE_* constants for valid values.
     *
     * @return the style of the border, never null.
     */
    public String getStyle()
    {
        return getCOSObject().getNameAsString(COSName.S, STYLE_SOLID);
    }

    /**
     * This will set the dash style used for drawing the border.
     *
     * @param dashArray the dash style to use
     */
    public void setDashStyle(COSArray dashArray)
    {
        getCOSObject().setItem(COSName.D, dashArray);
    }

    /**
     * This will retrieve the dash style used for drawing the border.
     *
     * @return the dash style of the border
     */
    public PDLineDashPattern getDashStyle()
    {
        COSArray d = getCOSObject().getCOSArray(COSName.D);
        if (d == null)
        {
            d = new COSArray();
            d.add(COSInteger.THREE);
            getCOSObject().setItem(COSName.D, d);
        }
        return new PDLineDashPattern(d, 0);
    }

}
