/*

 * Copyright (c) 2003, 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.toolkit;

import java.util.SortedSet;

import java.util.TreeSet;

import javax.lang.model.SourceVersion;

import javax.lang.model.element.PackageElement;

import javax.lang.model.element.TypeElement;

import jdk.javadoc.doclet.DocletEnvironment;

import jdk.javadoc.internal.doclets.toolkit.builders.AbstractBuilder;

import jdk.javadoc.internal.doclets.toolkit.builders.BuilderFactory;

import jdk.javadoc.internal.doclets.toolkit.util.ClassTree;

import jdk.javadoc.internal.doclets.toolkit.util.DocPaths;

import jdk.javadoc.internal.doclets.toolkit.util.DocletAbortException;

import jdk.javadoc.internal.doclets.toolkit.util.PackageListWriter;

import jdk.javadoc.internal.doclets.toolkit.util.Utils;

import static javax.tools.Diagnostic.Kind.*;

/**

 * An abstract implementation of a Doclet.

 *

 *  <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 Jamie Ho

 */

public abstract class AbstractDoclet {

    /**

     * The global configuration information for this run.

     */

    public Configuration configuration;

    /*

     *  a handle to our utility methods

     */

    protected Utils utils;

    /**

     * The only doclet that may use this toolkit is {@value}

     */

    private static final String TOOLKIT_DOCLET_NAME =

        jdk.javadoc.internal.doclets.formats.html.HtmlDoclet.class.getName();

    /**

     * Verify that the only doclet that is using this toolkit is

     * {@value #TOOLKIT_DOCLET_NAME}.

     */

    private boolean isValidDoclet() {

        if (!getClass().getName().equals(TOOLKIT_DOCLET_NAME)) {

            configuration.message.error("doclet.Toolkit_Usage_Violation",

                TOOLKIT_DOCLET_NAME);

            return false;

        }

        return true;

    }

    /**

     * The method that starts the execution of the doclet.

     *

     * @param root   the {@link DocletEnvironment} that points to the source to document.

     * @return true if the doclet executed without error.  False otherwise.

     */

    public boolean startDoclet(DocletEnvironment root) {

        configuration = configuration();

        configuration.root = root;

        configuration.cmtUtils = new CommentUtils(configuration);

        configuration.utils = new Utils(configuration);

        utils = configuration.utils;

        configuration.workArounds = new WorkArounds(configuration);

        if (!isValidDoclet()) {

            return false;

        }

        try {

            startGeneration(root);

        } catch (Configuration.Fault f) {

            configuration.reporter.print(ERROR, f.getMessage());

            return false;

        } catch (DocletAbortException e) {

            Throwable cause = e.getCause();

            if (cause != null) {

                if (cause.getLocalizedMessage() != null) {

                    configuration.reporter.print(ERROR, cause.getLocalizedMessage());

                } else {

                    configuration.reporter.print(ERROR, cause.toString());

                }

            }

            return false;

        } catch (Exception exc) {

            return false;

        }

        return true;

    }

    /**

     * Returns the SourceVersion indicating the features supported by this doclet.

     * @return SourceVersion

     */

    public SourceVersion sourceVersion() {

        return SourceVersion.RELEASE_8;

    }

    /**

     * Create the configuration instance and returns it.

     * @return the configuration of the doclet.

     */

    public abstract Configuration configuration();

    /**

     * Start the generation of files. Call generate methods in the individual

     * writers, which will in turn generate the documentation files. Call the

     * TreeWriter generation first to ensure the Class Hierarchy is built

     * first and then can be used in the later generation.

     *

     * @see jdk.doclet.DocletEnvironment

     */

    private void startGeneration(DocletEnvironment root) throws Configuration.Fault, Exception {

        if (root.getIncludedClasses().isEmpty()) {

            configuration.message.

                error("doclet.No_Public_Classes_To_Document");

            return;

        }

        if (!configuration.setOptions()) {

            return;

        }

        configuration.getDocletSpecificMsg().notice("doclet.build_version",

            configuration.getDocletSpecificBuildDate());

        ClassTree classtree = new ClassTree(configuration, configuration.nodeprecated);

        generateClassFiles(root, classtree);

        configuration.utils.copyDocFiles(DocPaths.DOC_FILES);

        PackageListWriter.generate(configuration);

        generatePackageFiles(classtree);

        generateOtherFiles(root, classtree);

        configuration.tagletManager.printReport();

    }

    /**

     * Generate additional documentation that is added to the API documentation.

     *

     * @param root     the DocletEnvironment of source to document.

     * @param classtree the data structure representing the class tree.

     */

    protected void generateOtherFiles(DocletEnvironment root, ClassTree classtree) throws Exception {

        BuilderFactory builderFactory = configuration.getBuilderFactory();

        AbstractBuilder constantsSummaryBuilder = builderFactory.getConstantsSummaryBuilder();

        constantsSummaryBuilder.build();

        AbstractBuilder serializedFormBuilder = builderFactory.getSerializedFormBuilder();

        serializedFormBuilder.build();

    }

    /**

     * Generate the package documentation.

     *

     * @param classtree the data structure representing the class tree.

     */

    protected abstract void generatePackageFiles(ClassTree classtree) throws Exception;

    /**

     * Generate the class documentation.

     *

     * @param classtree the data structure representing the class tree.

     */

    protected abstract void generateClassFiles(SortedSet<TypeElement> arr, ClassTree classtree);

    /**

     * Iterate through all classes and construct documentation for them.

     *

     * @param root      the DocletEnvironment of source to document.

     * @param classtree the data structure representing the class tree.

     */

    protected void generateClassFiles(DocletEnvironment root, ClassTree classtree) {

        generateClassFiles(classtree);

        SortedSet<PackageElement> packages = new TreeSet<>(utils.makePackageComparator());

        packages.addAll(utils.getSpecifiedPackages());

        packages.stream().forEach((pkg) -> {

            generateClassFiles(utils.getAllClasses(pkg), classtree);

        });

    }

    /**

     * Generate the class files for single classes specified on the command line.

     *

     * @param classtree the data structure representing the class tree.

     */

    private void generateClassFiles(ClassTree classtree) {

        SortedSet<PackageElement> packages = configuration.typeElementCatalog.packages();

        packages.stream().forEach((pkg) -> {

            generateClassFiles(configuration.typeElementCatalog.allClasses(pkg), classtree);

        });

    }

}