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/*
    This file is part of the iText (R) project.
    Copyright (c) 1998-2023 Apryse Group NV
    Authors: Apryse Software.

    This program is offered under a commercial and under the AGPL license.
    For commercial licensing, contact us at https://itextpdf.com/sales.  For AGPL licensing, see below.

    AGPL licensing:
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, either version 3 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 Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see .
 */
package com.itextpdf.kernel.pdf.annot;

import com.itextpdf.io.logs.IoLogMessageConstant;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.PdfDictionary;
import com.itextpdf.kernel.pdf.PdfName;
import com.itextpdf.kernel.pdf.PdfNumber;
import com.itextpdf.kernel.pdf.PdfObject;
import com.itextpdf.kernel.pdf.PdfString;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * This is a super class for the annotations which are defined as markup annotations
 * because they are used primarily to mark up PDF documents. These annotations have
 * text that appears as part of the annotation and may be displayed in other ways
 * by a conforming reader, such as in a Comments pane.
 * See also ISO-320001 12.5.6.2 "Markup Annotations".
 */
public abstract class PdfMarkupAnnotation extends PdfAnnotation {


    protected PdfAnnotation inReplyTo = null;
    protected PdfPopupAnnotation popup = null;

    protected PdfMarkupAnnotation(Rectangle rect) {
        super(rect);
    }

    /**
     * Instantiates a new {@link PdfMarkupAnnotation} instance based on {@link PdfDictionary}
     * instance, that represents existing annotation object in the document.
     *
     * @param pdfObject the {@link PdfDictionary} representing annotation object
     * @see PdfAnnotation#makeAnnotation(PdfObject)
     */
    protected PdfMarkupAnnotation(PdfDictionary pdfObject) {
        super(pdfObject);
    }

    /**
     * The text label that will be displayed in the title bar of the annotation's pop-up window
     * when open and active. This entry shall identify the user who added the annotation.
     * @return {@link PdfString} which value is an annotation text label content
     * or null if text is not specified.
     */
    public PdfString getText() {
        return getPdfObject().getAsString(PdfName.T);
    }

    /**
     * Sets the text label that will be displayed in the title bar of the annotation's pop-up window
     * when open and active. This entry shall identify the user who added the annotation.
     * @param text {@link PdfString} which value is an annotation text label content.
     * @return this {@link PdfMarkupAnnotation} instance.
     */
    public PdfMarkupAnnotation setText(PdfString text) {
        return (PdfMarkupAnnotation) put(PdfName.T, text);
    }

    /**
     * The constant opacity value that will be used in painting the annotation.
     * This value is applied to all visible elements of the annotation in its closed state
     * (including its background and border) but not to the pop-up window that appears when
     * the annotation is opened. Default value: 1.0.
     * @return a {@link PdfNumber} which value is in range between 0 and 1, which specifies the
     * level of opacity. This method returns null if opacity is not specified; in this case default
     * value is used, which is 1.
     */
    public PdfNumber getOpacity() {
        return getPdfObject().getAsNumber(PdfName.CA);
    }

    /**
     * Sets the constant opacity value that will be used in painting the annotation.
     * @param ca a {@link PdfNumber} which value is in range between 0 and 1, which specifies the
     * level of opacity.
     * @return this {@link PdfMarkupAnnotation} instance.
     * @see #getOpacity()
     */
    public PdfMarkupAnnotation setOpacity(PdfNumber ca) {
        return (PdfMarkupAnnotation) put(PdfName.CA, ca);
    }

    /**
     * A rich text string (see ISO-320001 12.7.3.4, "Rich Text Strings") that
     * shall be displayed in the pop-up window when the annotation is opened.
     * @return text string or text stream that specifies rich text or null if
     * rich text is not specified.
     */
    public PdfObject getRichText() {
        return getPdfObject().get(PdfName.RC);
    }

    /**
     * Sets a rich text string (see ISO-320001 12.7.3.4, "Rich Text Strings") that
     * shall be displayed in the pop-up window when the annotation is opened.
     * @param richText text string or text stream that specifies rich text.
     * @return this {@link PdfMarkupAnnotation} instance.
     */
    public PdfMarkupAnnotation setRichText(PdfObject richText) {
        return (PdfMarkupAnnotation) put(PdfName.RC, richText);
    }

    /**
     * The date and time when the annotation was created.
     * @return a {@link PdfString} which value should be in the date format specified in (ISO-320001 7.9.4, "Dates").
     */
    public PdfString getCreationDate() {
        return getPdfObject().getAsString(PdfName.CreationDate);
    }

    /**
     * Sets the date and time when the annotation was created.
     * @param creationDate {@link PdfString} which value should be in the date format
     *                                      specified in (ISO-320001 7.9.4, "Dates").
     * @return this {@link PdfMarkupAnnotation} instance.
     */
    public PdfMarkupAnnotation setCreationDate(PdfString creationDate) {
        return (PdfMarkupAnnotation) put(PdfName.CreationDate, creationDate);
    }

    /**
     * An annotation object that this annotation is "in reply to."
     * Both annotations shall be on the same page of the document.
     * The relationship between the two annotations shall be specified by the RT entry
     * (see {@link PdfMarkupAnnotation#getReplyType()}).
     * @return a {@link PdfDictionary} that represents an annotation that this annotation is "in reply to."
     */
    public PdfDictionary getInReplyToObject() {
        return getPdfObject().getAsDictionary(PdfName.IRT);
    }

    /**
     * An annotation that this annotation is "in reply to."
     * Both annotations shall be on the same page of the document.
     * The relationship between the two annotations shall be specified by the RT entry
     * (see {@link PdfMarkupAnnotation#getReplyType()}).
     * @return a {@link PdfAnnotation} that this annotation is "in reply to."
     */
    public PdfAnnotation getInReplyTo() {
        if (inReplyTo == null) {
            inReplyTo = makeAnnotation(getInReplyToObject());
        }
        return inReplyTo;
    }

    /**
     * Sets an annotation that this annotation is "in reply to."
     * Both annotations shall be on the same page of the document.
     * The relationship between the two annotations shall be specified by the RT entry
     * (see {@link PdfMarkupAnnotation#getReplyType()}).
     * @param inReplyTo a {@link PdfAnnotation} that this annotation is "in reply to."
     * @return this {@link PdfMarkupAnnotation} instance.
     */
    public PdfMarkupAnnotation setInReplyTo(PdfAnnotation inReplyTo) {
        this.inReplyTo = inReplyTo;
        return (PdfMarkupAnnotation) put(PdfName.IRT, inReplyTo.getPdfObject());
    }

    /**
     * Sets a pop-up annotation for entering or editing the text associated with this annotation.
     * Pop-up annotation defines an associated with this annotation pop-up window that may contain text.
     * The Contents (see {@link PdfAnnotation#setContents(PdfString)}) entry of the annotation that has
     * an associated popup specifies the text that shall be displayed when the pop-up window is opened.
     * @param popup an {@link PdfPopupAnnotation} that will be associated with this annotation.
     * @return this {@link PdfMarkupAnnotation} instance.
     */
    public PdfMarkupAnnotation setPopup(PdfPopupAnnotation popup) {
        this.popup = popup;
        popup.setParent(this);
        return (PdfMarkupAnnotation) put(PdfName.Popup, popup.getPdfObject());
    }

    /**
     * An associated pop-up annotation object. See {@link #getPopup()} for more info.
     * @return a {@link PdfDictionary} that represents an associated pop-up annotation,
     * or null if popup annotation is not specified.
     */
    public PdfDictionary getPopupObject() {
        return getPdfObject().getAsDictionary(PdfName.Popup);
    }

    /**
     * An associated pop-up annotation for entering or editing the text associated with this annotation.
     * Pop-up annotation defines an associated with this annotation pop-up window that may contain text.
     * The Contents (see {@link PdfAnnotation#getContents()}) entry of the annotation that has
     * an associated popup specifies the text that shall be displayed when the pop-up window is opened.
     * @return an {@link PdfPopupAnnotation} that is associated with this annotation, or null if there is none.
     */
    public PdfPopupAnnotation getPopup() {
        if (popup == null) {
            PdfDictionary popupObject = getPopupObject();
            if ( popupObject != null ) {
                PdfAnnotation annotation = makeAnnotation(popupObject);
                if (!(annotation instanceof PdfPopupAnnotation)) {
                    Logger logger = LoggerFactory.getLogger(PdfMarkupAnnotation.class);
                    logger.warn(IoLogMessageConstant.POPUP_ENTRY_IS_NOT_POPUP_ANNOTATION);
                    return null;
                }
                popup = (PdfPopupAnnotation) annotation;
            }
        }
        return popup;
    }

    /**
     * Text representing a short description of the subject being addressed by the annotation.
     * @return a {@link PdfString} which value is a annotation subject.
     */
    public PdfString getSubject() {
        return getPdfObject().getAsString(PdfName.Subj);
    }

    /**
     * Sets the text representing a short description of the subject being addressed by the annotation.
     * @param subject a {@link PdfString} which value is a annotation subject.
     * @return this {@link PdfMarkupAnnotation} instance.
     */
    public PdfMarkupAnnotation setSubject(PdfString subject) {
        return (PdfMarkupAnnotation) put(PdfName.Subj, subject);
    }

    /**
     * A name specifying the relationship (the "reply type") between this annotation and one specified by IRT entry
     * (see {@link #getInReplyTo()}). Valid values are:
     * 
     *     {@link PdfName#R} - The annotation shall be considered a reply to the annotation specified by IRT.
     *     Conforming readers shall not display replies to an annotation individually but together in the form of
     *     threaded comments.
     *     
{@link PdfName#Group} - The annotation shall be grouped with the annotation specified by IRT.
     * 
     * @return a {@link PdfName} specifying relationship with the specified by the IRT entry; or null if reply
     * type is not specified, in this case the default value is {@link PdfName#R}.
     */
    public PdfName getReplyType() {
        return getPdfObject().getAsName(PdfName.RT);
    }

    /**
     * Sets the relationship (the "reply type") between this annotation and one specified by IRT entry
     * (see {@link #setInReplyTo(PdfAnnotation)}). For valid values see {@link #getInReplyTo()}.
     * @param replyType a {@link PdfName} specifying relationship with the specified by the IRT entry.
     * @return this {@link PdfMarkupAnnotation} instance.
     */
    public PdfMarkupAnnotation setReplyType(PdfName replyType) {
        return (PdfMarkupAnnotation) put(PdfName.RT, replyType);
    }

    /**
     * A name describing the intent of the markup annotation.
     * See {@link #setIntent(PdfName)} for more info.
     * @return a {@link PdfName} describing the intent of the markup annotation, or null if not specified.
     */
    public PdfName getIntent() {
        return getPdfObject().getAsName(PdfName.IT);
    }

    /**
     * Sets a name describing the intent of the markup annotation.
     * Intents allow conforming readers to distinguish between different uses and behaviors
     * of a single markup annotation type. If this entry is not present or its value is the same as the annotation type,
     * the annotation shall have no explicit intent and should behave in a generic manner in a conforming reader.
     * 
     * See ISO-320001, free text annotations (Table 174), line annotations (Table 175), polygon annotations (Table 178),
     * and polyline annotations (Table 178) for the specific intent values for those types.
     *
     * @param intent a {@link PdfName} describing the intent of the markup annotation.
     * @return this {@link PdfMarkupAnnotation} instance.
     */
    public PdfMarkupAnnotation setIntent(PdfName intent) {
        return (PdfMarkupAnnotation) put(PdfName.IT, intent);
    }

    /**
     * An external data dictionary specifying data that shall be associated with the annotation.
     * This dictionary contains the following entries:
     * 

     *     {@link PdfName#Type} - (optional) If present, shall be {@link PdfName#ExData}.
     *     
{@link PdfName#Subtype} - (required) a name specifying the type of data that the markup annotation
     *     shall be associated with. The only defined value is {@link PdfName#Markup3D}. Table 298 (ISO-320001)
     *     lists the values that correspond to a subtype of Markup3D (See also {@link Pdf3DAnnotation}).
     * 
     *
     * @return An external data {@link PdfDictionary}, or null if not specified.
     */
    public PdfDictionary getExternalData() {
        return getPdfObject().getAsDictionary(PdfName.ExData);
    }

    /**
     * Sets an external data dictionary specifying data that shall be associated with the annotation.
     * This dictionary should contain the following entries:
     * 
     *     {@link PdfName#Type} - (optional) If present, shall be {@link PdfName#ExData}.
     *     
{@link PdfName#Subtype} - (required) a name specifying the type of data that the markup annotation
     *     shall be associated with. The only defined value is {@link PdfName#Markup3D}. Table 298 (ISO-320001)
     *     lists the values that correspond to a subtype of Markup3D (See also {@link Pdf3DAnnotation}).
     * 
     *
     * @param exData the external data dictionary
     * @return this {@link PdfMarkupAnnotation} instance
     */
    public PdfMarkupAnnotation setExternalData(PdfDictionary exData) {
        return (PdfMarkupAnnotation) put(PdfName.ExData, exData);
    }
}