/*
 * Copyright (c) 1998, 2016, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package jdk.javadoc.internal.doclets.formats.html;

import javax.lang.model.element.PackageElement;

import jdk.javadoc.internal.doclets.formats.html.markup.HtmlConstants;
import jdk.javadoc.internal.doclets.formats.html.markup.HtmlStyle;
import jdk.javadoc.internal.doclets.formats.html.markup.HtmlTag;
import jdk.javadoc.internal.doclets.formats.html.markup.HtmlTree;
import jdk.javadoc.internal.doclets.toolkit.Content;
import jdk.javadoc.internal.doclets.toolkit.util.ClassTree;
import jdk.javadoc.internal.doclets.toolkit.util.DocFileIOException;
import jdk.javadoc.internal.doclets.toolkit.util.DocPath;
import jdk.javadoc.internal.doclets.toolkit.util.DocPaths;


/**
 * Class to generate Tree page for a package. The name of the file generated is
 * "package-tree.html" and it is generated in the respective package directory.
 *
 *  <p><b>This is NOT part of any supported API.
 *  If you write code that depends on this, you do so at your own risk.
 *  This code and its internal interfaces are subject to change or
 *  deletion without notice.</b>
 *
 * @author Atul M Dambalkar
 * @author Bhavesh Patel (Modified)
 */
public class PackageTreeWriter extends AbstractTreeWriter {

    /**
     * Package for which tree is to be generated.
     */
    protected PackageElement packageElement;

    /**
     * The previous package name in the alpha-order list.
     */
    protected PackageElement prev;

    /**
     * The next package name in the alpha-order list.
     */
    protected PackageElement next;

    /**
     * Constructor.
     * @param configuration the configuration
     * @param path the docpath to generate files into
     * @param packageElement the current package
     * @param prev the previous package
     * @param next the next package
     */
    public PackageTreeWriter(ConfigurationImpl configuration,
                             DocPath path,
                             PackageElement packageElement,
                             PackageElement prev, PackageElement next) {
        super(configuration, path,
              new ClassTree(configuration.typeElementCatalog.allClasses(packageElement), configuration));
        this.packageElement = packageElement;
        this.prev = prev;
        this.next = next;
    }

    /**
     * Construct a PackageTreeWriter object and then use it to generate the
     * package tree page.
     *
     * @param configuration the configuration for this run.
     * @param pkg      Package for which tree file is to be generated.
     * @param prev     Previous package in the alpha-ordered list.
     * @param next     Next package in the alpha-ordered list.
     * @param noDeprecated  If true, do not generate any information for
     * deprecated classe or interfaces.
     * @throws DocFileIOException if there is a problem generating the package tree page
     */
    public static void generate(ConfigurationImpl configuration,
                                PackageElement pkg, PackageElement prev,
                                PackageElement next, boolean noDeprecated)
            throws DocFileIOException {
        DocPath path = DocPath.forPackage(pkg).resolve(DocPaths.PACKAGE_TREE);
        PackageTreeWriter packgen = new PackageTreeWriter(configuration, path, pkg, prev, next);
        packgen.generatePackageTreeFile();
    }

    /**
     * Generate a separate tree file for each package.
     * @throws DocFileIOException if there is a problem generating the package tree file
     */
    protected void generatePackageTreeFile() throws DocFileIOException {
        HtmlTree body = getPackageTreeHeader();
        HtmlTree htmlTree = (configuration.allowTag(HtmlTag.MAIN))
                ? HtmlTree.MAIN()
                : body;
        Content headContent = contents.getContent("doclet.Hierarchy_For_Package",
                utils.getPackageName(packageElement));
        Content heading = HtmlTree.HEADING(HtmlConstants.TITLE_HEADING, false,
                HtmlStyle.title, headContent);
        Content div = HtmlTree.DIV(HtmlStyle.header, heading);
        if (configuration.packages.size() > 1) {
            addLinkToMainTree(div);
        }
        htmlTree.addContent(div);
        HtmlTree divTree = new HtmlTree(HtmlTag.DIV);
        divTree.addStyle(HtmlStyle.contentContainer);
        addTree(classtree.baseClasses(), "doclet.Class_Hierarchy", divTree);
        addTree(classtree.baseInterfaces(), "doclet.Interface_Hierarchy", divTree);
        addTree(classtree.baseAnnotationTypes(), "doclet.Annotation_Type_Hierarchy", divTree);
        addTree(classtree.baseEnums(), "doclet.Enum_Hierarchy", divTree, true);
        htmlTree.addContent(divTree);
        if (configuration.allowTag(HtmlTag.MAIN)) {
            body.addContent(htmlTree);
        }
        HtmlTree tree = (configuration.allowTag(HtmlTag.FOOTER))
                ? HtmlTree.FOOTER()
                : body;
        addNavLinks(false, tree);
        addBottom(tree);
        if (configuration.allowTag(HtmlTag.FOOTER)) {
            body.addContent(tree);
        }
        printHtmlDocument(null, true, body);
    }

    /**
     * Get the package tree header.
     *
     * @return a content tree for the header
     */
    protected HtmlTree getPackageTreeHeader() {
        String packageName = packageElement.isUnnamed() ? "" : utils.getPackageName(packageElement);
        String title = packageName + " " + configuration.getText("doclet.Window_Class_Hierarchy");
        HtmlTree bodyTree = getBody(true, getWindowTitle(title));
        HtmlTree htmlTree = (configuration.allowTag(HtmlTag.HEADER))
                ? HtmlTree.HEADER()
                : bodyTree;
        addTop(htmlTree);
        addNavLinks(true, htmlTree);
        if (configuration.allowTag(HtmlTag.HEADER)) {
            bodyTree.addContent(htmlTree);
        }
        return bodyTree;
    }

    /**
     * Add a link to the tree for all the packages.
     *
     * @param div the content tree to which the link will be added
     */
    protected void addLinkToMainTree(Content div) {
        Content span = HtmlTree.SPAN(HtmlStyle.packageHierarchyLabel,
                contents.packageHierarchies);
        div.addContent(span);
        HtmlTree ul = new HtmlTree (HtmlTag.UL);
        ul.addStyle(HtmlStyle.horizontal);
        ul.addContent(getNavLinkMainTree(configuration.getText("doclet.All_Packages")));
        div.addContent(ul);
    }

    /**
     * Get link for the previous package tree file.
     *
     * @return a content tree for the link
     */
    @Override
    protected Content getNavLinkPrevious() {
        if (prev == null) {
            return getNavLinkPrevious(null);
        } else {
            DocPath path = DocPath.relativePath(packageElement, prev);
            return getNavLinkPrevious(path.resolve(DocPaths.PACKAGE_TREE));
        }
    }

    /**
     * Get link for the next package tree file.
     *
     * @return a content tree for the link
     */
    @Override
    protected Content getNavLinkNext() {
        if (next == null) {
            return getNavLinkNext(null);
        } else {
            DocPath path = DocPath.relativePath(packageElement, next);
            return getNavLinkNext(path.resolve(DocPaths.PACKAGE_TREE));
        }
    }

    /**
     * Get the module link.
     *
     * @return a content tree for the module link
     */
    @Override
    protected Content getNavLinkModule() {
        Content linkContent = getModuleLink(utils.elementUtils.getModuleOf(packageElement),
                contents.moduleLabel);
        Content li = HtmlTree.LI(linkContent);
        return li;
    }

    /**
     * Get link to the package summary page for the package of this tree.
     *
     * @return a content tree for the package link
     */
    @Override
    protected Content getNavLinkPackage() {
        Content linkContent = getHyperLink(DocPaths.PACKAGE_SUMMARY,
                contents.packageLabel);
        Content li = HtmlTree.LI(linkContent);
        return li;
    }
}