/*
 * Copyright (c) 1998, 2020, 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
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 * questions.
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package jdk.javadoc.internal.doclets.formats.html;

import jdk.javadoc.internal.doclets.formats.html.markup.Table;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.SortedSet;
import java.util.TreeSet;

import javax.lang.model.element.Element;
import javax.lang.model.element.PackageElement;
import javax.lang.model.element.TypeElement;
import javax.tools.Diagnostic;

import jdk.javadoc.internal.doclets.formats.html.markup.ContentBuilder;
import jdk.javadoc.internal.doclets.formats.html.markup.HtmlStyle;
import jdk.javadoc.internal.doclets.formats.html.markup.TagName;
import jdk.javadoc.internal.doclets.formats.html.markup.HtmlTree;
import jdk.javadoc.internal.doclets.formats.html.Navigation.PageMode;
import jdk.javadoc.internal.doclets.formats.html.markup.StringContent;
import jdk.javadoc.internal.doclets.toolkit.Content;
import jdk.javadoc.internal.doclets.toolkit.util.ClassTree;
import jdk.javadoc.internal.doclets.toolkit.util.ClassUseMapper;
import jdk.javadoc.internal.doclets.toolkit.util.DocFileIOException;
import jdk.javadoc.internal.doclets.toolkit.util.DocPath;
import jdk.javadoc.internal.doclets.toolkit.util.DocPaths;
import jdk.javadoc.internal.doclets.toolkit.util.Utils;


Generate class usage information.
 
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.
/**
 * Generate class usage information.
 *
 *  <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>
 */
public class ClassUseWriter extends SubWriterHolderWriter {

    final TypeElement typeElement;
    Set<PackageElement> pkgToPackageAnnotations = null;
    final Map<PackageElement, List<Element>> pkgToClassTypeParameter;
    final Map<PackageElement, List<Element>> pkgToClassAnnotations;
    final Map<PackageElement, List<Element>> pkgToMethodTypeParameter;
    final Map<PackageElement, List<Element>> pkgToMethodArgTypeParameter;
    final Map<PackageElement, List<Element>> pkgToMethodReturnTypeParameter;
    final Map<PackageElement, List<Element>> pkgToMethodAnnotations;
    final Map<PackageElement, List<Element>> pkgToMethodParameterAnnotations;
    final Map<PackageElement, List<Element>> pkgToFieldTypeParameter;
    final Map<PackageElement, List<Element>> pkgToFieldAnnotations;
    final Map<PackageElement, List<Element>> pkgToSubclass;
    final Map<PackageElement, List<Element>> pkgToSubinterface;
    final Map<PackageElement, List<Element>> pkgToImplementingClass;
    final Map<PackageElement, List<Element>> pkgToField;
    final Map<PackageElement, List<Element>> pkgToMethodReturn;
    final Map<PackageElement, List<Element>> pkgToMethodArgs;
    final Map<PackageElement, List<Element>> pkgToMethodThrows;
    final Map<PackageElement, List<Element>> pkgToConstructorAnnotations;
    final Map<PackageElement, List<Element>> pkgToConstructorParameterAnnotations;
    final Map<PackageElement, List<Element>> pkgToConstructorArgs;
    final Map<PackageElement, List<Element>> pkgToConstructorArgTypeParameter;
    final Map<PackageElement, List<Element>> pkgToConstructorThrows;
    final SortedSet<PackageElement> pkgSet;
    final MethodWriterImpl methodSubWriter;
    final ConstructorWriterImpl constrSubWriter;
    final FieldWriterImpl fieldSubWriter;
    final NestedClassWriterImpl classSubWriter;
    private final Navigation navBar;

    
Constructor.
Params:
filename – the file to be generated./**
     * Constructor.
     *
     * @param filename the file to be generated.
     */
    public ClassUseWriter(HtmlConfiguration configuration,
                          ClassUseMapper mapper, DocPath filename,
                          TypeElement typeElement) {
        super(configuration, filename);
        this.typeElement = typeElement;
        if (mapper.classToPackageAnnotations.containsKey(typeElement)) {
            pkgToPackageAnnotations = new TreeSet<>(comparators.makeClassUseComparator());
            pkgToPackageAnnotations.addAll(mapper.classToPackageAnnotations.get(typeElement));
        }
        configuration.currentTypeElement = typeElement;
        this.pkgSet = new TreeSet<>(comparators.makePackageComparator());
        this.pkgToClassTypeParameter = pkgDivide(mapper.classToClassTypeParam);
        this.pkgToClassAnnotations = pkgDivide(mapper.classToClassAnnotations);
        this.pkgToMethodTypeParameter = pkgDivide(mapper.classToMethodTypeParam);
        this.pkgToMethodArgTypeParameter = pkgDivide(mapper.classToMethodArgTypeParam);
        this.pkgToFieldTypeParameter = pkgDivide(mapper.classToFieldTypeParam);
        this.pkgToFieldAnnotations = pkgDivide(mapper.annotationToField);
        this.pkgToMethodReturnTypeParameter = pkgDivide(mapper.classToMethodReturnTypeParam);
        this.pkgToMethodAnnotations = pkgDivide(mapper.classToMethodAnnotations);
        this.pkgToMethodParameterAnnotations = pkgDivide(mapper.classToMethodParamAnnotation);
        this.pkgToSubclass = pkgDivide(mapper.classToSubclass);
        this.pkgToSubinterface = pkgDivide(mapper.classToSubinterface);
        this.pkgToImplementingClass = pkgDivide(mapper.classToImplementingClass);
        this.pkgToField = pkgDivide(mapper.classToField);
        this.pkgToMethodReturn = pkgDivide(mapper.classToMethodReturn);
        this.pkgToMethodArgs = pkgDivide(mapper.classToMethodArgs);
        this.pkgToMethodThrows = pkgDivide(mapper.classToMethodThrows);
        this.pkgToConstructorAnnotations = pkgDivide(mapper.classToConstructorAnnotations);
        this.pkgToConstructorParameterAnnotations = pkgDivide(mapper.classToConstructorParamAnnotation);
        this.pkgToConstructorArgs = pkgDivide(mapper.classToConstructorArgs);
        this.pkgToConstructorArgTypeParameter = pkgDivide(mapper.classToConstructorArgTypeParam);
        this.pkgToConstructorThrows = pkgDivide(mapper.classToConstructorThrows);
        //tmp test
        if (pkgSet.size() > 0 &&
            mapper.classToPackage.containsKey(this.typeElement) &&
            !pkgSet.equals(mapper.classToPackage.get(this.typeElement))) {
            configuration.reporter.print(Diagnostic.Kind.WARNING,
                    "Internal error: package sets don't match: "
                    + pkgSet + " with: " + mapper.classToPackage.get(this.typeElement));
        }

        methodSubWriter = new MethodWriterImpl(this);
        constrSubWriter = new ConstructorWriterImpl(this);
        fieldSubWriter = new FieldWriterImpl(this);
        classSubWriter = new NestedClassWriterImpl(this);
        this.navBar = new Navigation(typeElement, configuration, PageMode.USE, path);
    }

    
Write out class use pages.
Params:
configuration – the configuration for this doclet
classtree – the class tree hierarchy
Throws:
DocFileIOException – if there is an error while generating the documentation/**
     * Write out class use pages.
     *
     * @param configuration the configuration for this doclet
     * @param classtree the class tree hierarchy
     * @throws DocFileIOException if there is an error while generating the documentation
     */
    public static void generate(HtmlConfiguration configuration, ClassTree classtree) throws DocFileIOException  {
        ClassUseMapper mapper = new ClassUseMapper(configuration, classtree);
        boolean nodeprecated = configuration.getOptions().noDeprecated();
        Utils utils = configuration.utils;
        for (TypeElement aClass : configuration.getIncludedTypeElements()) {
            // If -nodeprecated option is set and the containing package is marked
            // as deprecated, do not generate the class-use page. We will still generate
            // the class-use page if the class is marked as deprecated but the containing
            // package is not since it could still be linked from that package-use page.
            if (!(nodeprecated &&
                  utils.isDeprecated(utils.containingPackage(aClass))))
                ClassUseWriter.generate(configuration, mapper, aClass);
        }
        for (PackageElement pkg : configuration.packages) {
            // If -nodeprecated option is set and the package is marked
            // as deprecated, do not generate the package-use page.
            if (!(nodeprecated && utils.isDeprecated(pkg)))
                PackageUseWriter.generate(configuration, mapper, pkg);
        }
    }

    private Map<PackageElement, List<Element>> pkgDivide(Map<TypeElement, ? extends List<? extends Element>> classMap) {
        Map<PackageElement, List<Element>> map = new HashMap<>();
        List<? extends Element> elements = (List<? extends Element>) classMap.get(typeElement);
        if (elements != null) {
            Collections.sort(elements, comparators.makeClassUseComparator());
            for (Element e : elements) {
                PackageElement pkg = utils.containingPackage(e);
                pkgSet.add(pkg);
                List<Element> inPkg = map.get(pkg);
                if (inPkg == null) {
                    inPkg = new ArrayList<>();
                    map.put(pkg, inPkg);
                }
                inPkg.add(e);
            }
        }
        return map;
    }

    
Generate a class page.
Throws:
DocFileIOException – if there is a problem while generating the documentation/**
     * Generate a class page.
     *
     * @throws DocFileIOException if there is a problem while generating the documentation
     */
    public static void generate(HtmlConfiguration configuration, ClassUseMapper mapper,
                                TypeElement typeElement) throws DocFileIOException {
        ClassUseWriter clsgen;
        DocPath path = configuration.docPaths.forPackage(typeElement)
                              .resolve(DocPaths.CLASS_USE)
                              .resolve(configuration.docPaths.forName( typeElement));
        clsgen = new ClassUseWriter(configuration, mapper, path, typeElement);
        clsgen.generateClassUseFile();
    }

    
Generate the class use elements.
Throws:
DocFileIOException – if there is a problem while generating the documentation/**
     * Generate the class use elements.
     *
     * @throws DocFileIOException if there is a problem while generating the documentation
     */
    protected void generateClassUseFile() throws DocFileIOException {
        HtmlTree body = getClassUseHeader();
        Content mainContent = new ContentBuilder();
        if (pkgSet.size() > 0) {
            addClassUse(mainContent);
        } else {
            mainContent.add(contents.getContent("doclet.ClassUse_No.usage.of.0",
                    utils.getFullyQualifiedName(typeElement)));
        }
        bodyContents.addMainContent(mainContent);
        HtmlTree footer = HtmlTree.FOOTER();
        navBar.setUserFooter(getUserHeaderFooter(false));
        footer.add(navBar.getContent(Navigation.Position.BOTTOM));
        addBottom(footer);
        bodyContents.setFooter(footer);
        body.add(bodyContents);
        String description = getDescription("use", typeElement);
        printHtmlDocument(null, description, body);
    }

    
Add the class use documentation.
Params:
contentTree – the content tree to which the class use information will be added/**
     * Add the class use documentation.
     *
     * @param contentTree the content tree to which the class use information will be added
     */
    protected void addClassUse(Content contentTree) {
        Content content = new ContentBuilder();
        if (configuration.packages.size() > 1) {
            addPackageList(content);
            addPackageAnnotationList(content);
        }
        addClassList(content);
        contentTree.add(content);
    }

    
Add the packages elements that use the given class.
Params:
contentTree – the content tree to which the packages elements will be added/**
     * Add the packages elements that use the given class.
     *
     * @param contentTree the content tree to which the packages elements will be added
     */
    protected void addPackageList(Content contentTree) {
        Content caption = contents.getContent(
                "doclet.ClassUse_Packages.that.use.0",
                getLink(new LinkInfoImpl(configuration,
                        LinkInfoImpl.Kind.CLASS_USE_HEADER, typeElement)));
        Table table = new Table(HtmlStyle.useSummary, HtmlStyle.summaryTable)
                .setCaption(caption)
                .setHeader(getPackageTableHeader())
                .setColumnStyles(HtmlStyle.colFirst, HtmlStyle.colLast);
        for (PackageElement pkg : pkgSet) {
            addPackageUse(pkg, table);
        }
        contentTree.add(table);
    }

    
Add the package annotation elements.
Params:
contentTree – the content tree to which the package annotation elements will be added/**
     * Add the package annotation elements.
     *
     * @param contentTree the content tree to which the package annotation elements will be added
     */
    protected void addPackageAnnotationList(Content contentTree) {
        if (!utils.isAnnotationType(typeElement) ||
                pkgToPackageAnnotations == null ||
                pkgToPackageAnnotations.isEmpty()) {
            return;
        }
        Content caption = contents.getContent(
                "doclet.ClassUse_PackageAnnotation",
                getLink(new LinkInfoImpl(configuration,
                        LinkInfoImpl.Kind.CLASS_USE_HEADER, typeElement)));

        Table table = new Table(HtmlStyle.useSummary, HtmlStyle.summaryTable)
                .setCaption(caption)
                .setHeader(getPackageTableHeader())
                .setColumnStyles(HtmlStyle.colFirst, HtmlStyle.colLast);
        for (PackageElement pkg : pkgToPackageAnnotations) {
            Content summary = new ContentBuilder();
            addSummaryComment(pkg, summary);
            table.addRow(getPackageLink(pkg), summary);
        }
        contentTree.add(table);
    }

    
Add the class elements that use the given class.
Params:
contentTree – the content tree to which the class elements will be added/**
     * Add the class elements that use the given class.
     *
     * @param contentTree the content tree to which the class elements will be added
     */
    protected void addClassList(Content contentTree) {
        HtmlTree ul = new HtmlTree(TagName.UL);
        ul.setStyle(HtmlStyle.blockList);
        for (PackageElement pkg : pkgSet) {
            HtmlTree htmlTree = HtmlTree.SECTION(HtmlStyle.detail).setId(getPackageAnchorName(pkg));
            Content link = contents.getContent("doclet.ClassUse_Uses.of.0.in.1",
                    getLink(new LinkInfoImpl(configuration, LinkInfoImpl.Kind.CLASS_USE_HEADER,
                            typeElement)),
                    getPackageLink(pkg, utils.getPackageName(pkg)));
            Content heading = HtmlTree.HEADING(Headings.TypeUse.SUMMARY_HEADING, link);
            htmlTree.add(heading);
            addClassUse(pkg, htmlTree);
            ul.add(HtmlTree.LI(htmlTree));
        }
        Content li = HtmlTree.SECTION(HtmlStyle.classUses, ul);
        contentTree.add(li);
    }

    
Add the package use information.
Params:
pkg – the package that uses the given class
table – the table to which the package use information will be added/**
     * Add the package use information.
     *
     * @param pkg the package that uses the given class
     * @param table the table to which the package use information will be added
     */
    protected void addPackageUse(PackageElement pkg, Table table) {
        Content pkgLink =
                links.createLink(getPackageAnchorName(pkg), new StringContent(utils.getPackageName(pkg)));
        Content summary = new ContentBuilder();
        addSummaryComment(pkg, summary);
        table.addRow(pkgLink, summary);
    }

    
Add the class use information.
Params:
pkg – the package that uses the given class
contentTree – the content tree to which the class use information will be added/**
     * Add the class use information.
     *
     * @param pkg the package that uses the given class
     * @param contentTree the content tree to which the class use information will be added
     */
    protected void addClassUse(PackageElement pkg, Content contentTree) {
        Content classLink = getLink(new LinkInfoImpl(configuration,
            LinkInfoImpl.Kind.CLASS_USE_HEADER, typeElement));
        Content pkgLink = getPackageLink(pkg, utils.getPackageName(pkg));
        classSubWriter.addUseInfo(pkgToClassAnnotations.get(pkg),
                contents.getContent("doclet.ClassUse_Annotation", classLink,
                pkgLink), contentTree);
        classSubWriter.addUseInfo(pkgToClassTypeParameter.get(pkg),
                contents.getContent("doclet.ClassUse_TypeParameter", classLink,
                pkgLink), contentTree);
        classSubWriter.addUseInfo(pkgToSubclass.get(pkg),
                contents.getContent("doclet.ClassUse_Subclass", classLink,
                pkgLink), contentTree);
        classSubWriter.addUseInfo(pkgToSubinterface.get(pkg),
                contents.getContent("doclet.ClassUse_Subinterface", classLink,
                pkgLink), contentTree);
        classSubWriter.addUseInfo(pkgToImplementingClass.get(pkg),
                contents.getContent("doclet.ClassUse_ImplementingClass", classLink,
                pkgLink), contentTree);
        fieldSubWriter.addUseInfo(pkgToField.get(pkg),
                contents.getContent("doclet.ClassUse_Field", classLink,
                pkgLink), contentTree);
        fieldSubWriter.addUseInfo(pkgToFieldAnnotations.get(pkg),
                contents.getContent("doclet.ClassUse_FieldAnnotations", classLink,
                pkgLink), contentTree);
        fieldSubWriter.addUseInfo(pkgToFieldTypeParameter.get(pkg),
                contents.getContent("doclet.ClassUse_FieldTypeParameter", classLink,
                pkgLink), contentTree);
        methodSubWriter.addUseInfo(pkgToMethodAnnotations.get(pkg),
                contents.getContent("doclet.ClassUse_MethodAnnotations", classLink,
                pkgLink), contentTree);
        methodSubWriter.addUseInfo(pkgToMethodParameterAnnotations.get(pkg),
                contents.getContent("doclet.ClassUse_MethodParameterAnnotations", classLink,
                pkgLink), contentTree);
        methodSubWriter.addUseInfo(pkgToMethodTypeParameter.get(pkg),
                contents.getContent("doclet.ClassUse_MethodTypeParameter", classLink,
                pkgLink), contentTree);
        methodSubWriter.addUseInfo(pkgToMethodReturn.get(pkg),
                contents.getContent("doclet.ClassUse_MethodReturn", classLink,
                pkgLink), contentTree);
        methodSubWriter.addUseInfo(pkgToMethodReturnTypeParameter.get(pkg),
                contents.getContent("doclet.ClassUse_MethodReturnTypeParameter", classLink,
                pkgLink), contentTree);
        methodSubWriter.addUseInfo(pkgToMethodArgs.get(pkg),
                contents.getContent("doclet.ClassUse_MethodArgs", classLink,
                pkgLink), contentTree);
        methodSubWriter.addUseInfo(pkgToMethodArgTypeParameter.get(pkg),
                contents.getContent("doclet.ClassUse_MethodArgsTypeParameters", classLink,
                pkgLink), contentTree);
        methodSubWriter.addUseInfo(pkgToMethodThrows.get(pkg),
                contents.getContent("doclet.ClassUse_MethodThrows", classLink,
                pkgLink), contentTree);
        constrSubWriter.addUseInfo(pkgToConstructorAnnotations.get(pkg),
                contents.getContent("doclet.ClassUse_ConstructorAnnotations", classLink,
                pkgLink), contentTree);
        constrSubWriter.addUseInfo(pkgToConstructorParameterAnnotations.get(pkg),
                contents.getContent("doclet.ClassUse_ConstructorParameterAnnotations", classLink,
                pkgLink), contentTree);
        constrSubWriter.addUseInfo(pkgToConstructorArgs.get(pkg),
                contents.getContent("doclet.ClassUse_ConstructorArgs", classLink,
                pkgLink), contentTree);
        constrSubWriter.addUseInfo(pkgToConstructorArgTypeParameter.get(pkg),
                contents.getContent("doclet.ClassUse_ConstructorArgsTypeParameters", classLink,
                pkgLink), contentTree);
        constrSubWriter.addUseInfo(pkgToConstructorThrows.get(pkg),
                contents.getContent("doclet.ClassUse_ConstructorThrows", classLink,
                pkgLink), contentTree);
    }

    
Get the header for the class use Listing.
Returns:
a content tree representing the class use header/**
     * Get the header for the class use Listing.
     *
     * @return a content tree representing the class use header
     */
    protected HtmlTree getClassUseHeader() {
        String cltype = resources.getText(utils.isInterface(typeElement)
                ? "doclet.Interface"
                : "doclet.Class");
        String clname = utils.getFullyQualifiedName(typeElement);
        String title = resources.getText("doclet.Window_ClassUse_Header",
                cltype, clname);
        HtmlTree bodyTree = getBody(getWindowTitle(title));
        Content headerContent = new ContentBuilder();
        addTop(headerContent);
        Content mdleLinkContent = getModuleLink(utils.elementUtils.getModuleOf(typeElement),
                contents.moduleLabel);
        navBar.setNavLinkModule(mdleLinkContent);
        Content classLinkContent = getLink(new LinkInfoImpl(
                configuration, LinkInfoImpl.Kind.CLASS_USE_HEADER, typeElement)
                .label(resources.getText("doclet.Class")));
        navBar.setNavLinkClass(classLinkContent);
        navBar.setUserHeader(getUserHeaderFooter(true));
        headerContent.add(navBar.getContent(Navigation.Position.TOP));
        ContentBuilder headingContent = new ContentBuilder();
        headingContent.add(contents.getContent("doclet.ClassUse_Title", cltype));
        headingContent.add(new HtmlTree(TagName.BR));
        headingContent.add(clname);
        Content heading = HtmlTree.HEADING_TITLE(Headings.PAGE_TITLE_HEADING,
                HtmlStyle.title, headingContent);
        Content div = HtmlTree.DIV(HtmlStyle.header, heading);
        bodyContents.setHeader(headerContent).addMainContent(div);
        return bodyTree;
    }
}