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/*
 * Copyright 2008 Google Inc.
 *
 * Licensed 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 com.google.gwt.soyc;

import com.google.gwt.core.ext.linker.CompilationMetricsArtifact;
import com.google.gwt.core.ext.linker.ModuleMetricsArtifact;
import com.google.gwt.core.ext.linker.PrecompilationMetricsArtifact;
import com.google.gwt.dev.util.StringInterner;
import com.google.gwt.soyc.MakeTopLevelHtmlForPerm.DependencyLinker;
import com.google.gwt.soyc.MakeTopLevelHtmlForPerm.NullDependencyLinker;
import com.google.gwt.soyc.io.FileSystemOutputDirectory;
import com.google.gwt.soyc.io.OutputDirectory;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Scanner;
import java.util.TreeMap;
import java.util.TreeSet;
import java.util.zip.GZIPInputStream;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

/**
 * The command-line entry point for creating a compile report.
 */
public class SoycDashboard {
  private static class FormatException extends RuntimeException {
    public FormatException() {
      super();
    }

    public FormatException(String message) {
      super(message);
    }

    public FormatException(Throwable cause) {
      super(cause);
    }
  }

  public static void main(final String[] args) throws InterruptedException {

    System.out.println("WARNING: The direct use of the SoycDashboard is deprecated and will be removed. " +
      "The preferred usage is to invoke the compiler with the -compileReport option, which " +
      "writes the compile report directly to the extra directory.");
    Thread.currentThread();
    Thread.sleep(5000);

    Settings settings;
    try {
      settings = Settings.fromArgumentList(args);
    } catch (Settings.ArgumentListException e) {
      System.err.println(e.getMessage());
      System.err.println("Usage: "
          + "java com.google.gwt.soyc.SoycDashboard -resources dir -soycDir dir -symbolMaps dir [-out dir]");
      System.err.println("(Legacy usage: "
          + "java com.google.gwt.soyc.SoycDashboard options stories0.xml[.gz] [dependencies0.xml[.gz]] [splitpoints0.xml[.gz]])");
      System.err.println("Options:");
      System.err.println(Settings.settingsHelp());
      System.exit(1);
      return; // not reached
    }

    System.out.println("Generating the Story of Your Compile...");

    OutputDirectory outDir = new FileSystemOutputDirectory(new File(
        settings.out.get()));

    try {
      Map> permInfo = readPermutationInfo(settings);
      SoycDashboard dashboard = new SoycDashboard(outDir);
      for (String permutationId : permInfo.keySet()) {
        dashboard.startNewPermutation(permutationId);
        if (settings.symbolMapsDir.get() == null) {
          dashboard.readFromFilesNamed(settings.storiesFileName,
              settings.depFileName, settings.splitPointsFileName);
        } else {
          String soycDir = settings.soycDir.get();
          dashboard.readFromFilesNamed(soycInputFile(soycDir, "stories",
              permutationId), soycInputFile(soycDir, "dependencies",
              permutationId), soycInputFile(soycDir, "splitPoints",
              permutationId));
        }
        dashboard.generateForOnePermutation();
        System.out.println("Finished creating reports for permutation.");
      }

      dashboard.generateCrossPermutationFiles(permInfo);
      System.out.println("Finished creating reports. To see the dashboard, open index.html in your browser.");
    } catch (ParserConfigurationException e) {
      System.err.println("Could not parse document. " + e.getMessage());
      System.exit(1);
    } catch (SAXException e) {
      System.err.println("Could not create SAX parser. " + e.getMessage());
      System.exit(1);
    } catch (FileNotFoundException e) {
      System.err.println("Cannot open file " + e.getMessage());
      System.exit(1);
    } catch (IOException e) {
      System.err.println("Error creating html file. " + e.getMessage());
      System.exit(1);
    }
  }

  /**
   * Open a file for reading. If the filename ends in .gz, then wrap the stream
   * with a {@link GZIPInputStream}.
   */
  public static InputStream openPossiblyGzippedFile(String filename)
      throws IOException {
    InputStream in = new FileInputStream(filename);
    if (filename.endsWith(".gz")) {
      in = new GZIPInputStream(in);
    }
    in = new BufferedInputStream(in);
    return in;
  }

  /*
   * cleans up the RPC code categories
   */
  private static void foldInRPCHeuristic(
      final HashMap nameToCodeColl) {
    /**
     * Heuristic: this moves all classes that override serializable from RPC to
     * "Other Code" *if* there is no RPC generated code, i.e., if the
     * application really is not using RPC
     */

    if (nameToCodeColl.get("rpcGen").classes.size() == 0) {

      for (String className : nameToCodeColl.get("rpcUser").classes) {

        if ((!nameToCodeColl.get("widget").classes.contains(className))
            && (!nameToCodeColl.get("jre").classes.contains(className))
            && (!nameToCodeColl.get("gwtLang").classes.contains(className))) {
          nameToCodeColl.get("allOther").classes.add(className);
        }
      }
      nameToCodeColl.get("rpcUser").classes.clear();

      for (String className : nameToCodeColl.get("rpcGwt").classes) {
        if ((!nameToCodeColl.get("widget").classes.contains(className))
            && (!nameToCodeColl.get("jre").classes.contains(className))
            && (!nameToCodeColl.get("gwtLang").classes.contains(className))) {
          nameToCodeColl.get("allOther").classes.add(className);
        }
      }
      nameToCodeColl.get("rpcGwt").classes.clear();
    }
  }

  private static DefaultHandler parseXMLDocumentDependencies(
      final Map> allDependencies) {
    DefaultHandler handler = new DefaultHandler() {

      // may want to create a class for this later
      String curMethod;
      Map dependencies = new TreeMap();
      String graphExtends = null;
      StringBuilder valueBuilder = new StringBuilder();

      @Override
      public void endElement(String uri, String localName, String qName) {
        if (localName.compareTo("table") == 0) {
          if (graphExtends != null) {
            // Add in elements from the extended graph
            for (Entry entry : allDependencies.get(graphExtends).entrySet()) {
              dependencies.put(entry.getKey(), entry.getValue());
            }
          }
        }
      }

      @Override
      public void startElement(String nsUri, String strippedName,
          String tagName, final Attributes attributes) {

        valueBuilder.delete(0, valueBuilder.length());

        if (strippedName.compareTo("table") == 0
            && (attributes.getValue("name") != null)) {
          String name = attributes.getValue("name");
          dependencies = new TreeMap();
          allDependencies.put(StringInterner.get().intern(name), dependencies);
          if (attributes.getValue("extends") != null) {
            graphExtends = StringInterner.get().intern(attributes.getValue("extends"));
            if (!allDependencies.containsKey(graphExtends)) {
              throw new FormatException("Graph " + name
                  + " extends an unknown graph " + graphExtends);
            }
          } else {
            graphExtends = null;
          }
        } else if ((strippedName.compareTo("method") == 0)
            && (attributes.getValue("name") != null)) {
          curMethod = StringInterner.get().intern(attributes.getValue("name"));
        } else if ((strippedName.compareTo("called") == 0)
            && (attributes.getValue("by") != null)) {
          String curDepMethod = attributes.getValue("by");
          if (!dependencies.containsKey(curMethod)) {
            dependencies.put(StringInterner.get().intern(curMethod),
                StringInterner.get().intern(curDepMethod));
          }
        }
      }
    };
    return handler;
  }

  private static Map> readPermutationInfo(Settings settings)
      throws FileNotFoundException {
    Map> allPermsInfo = new TreeMap>();
    if (settings.symbolMapsDir.get() == null) {
      String permutationId = settings.storiesFileName;
      permutationId = permutationId.replaceAll(".*/stories", "");
      permutationId = permutationId.replaceAll("\\.xml(\\.gz)?", "");
    } else {
      File dir = new File(settings.symbolMapsDir.get());
      String files[] = dir.list();
      for (Integer i = 0; i < files.length; i++) {
        String permFileName = settings.symbolMapsDir.get() + "/" + files[i];
        FileReader fir = new FileReader(permFileName);

        Scanner sc = new Scanner(fir);

        String permutationId = "";
        String permutationInfo = "";
        List permutationInfoList = new ArrayList();
        boolean firstLine = true;
        String curLine = sc.nextLine();
        curLine = curLine.trim();
        while (curLine.startsWith("# {")) {

            curLine = curLine.replace("# {", "");
            curLine = curLine.replace("}", "");
            curLine = curLine.trim();
            if (firstLine) {
              permutationId = curLine;
              firstLine = false;
            } else {
              if (permutationInfo.length() > 0) {
                permutationInfo += "
"; } permutationInfo += curLine; permutationInfoList.add(curLine); } if (sc.hasNextLine()) { curLine = sc.nextLine(); curLine = curLine.trim(); } } allPermsInfo.put(permutationId, permutationInfoList); } } return allPermsInfo; } private static String soycInputFile(String soycDir, String baseName, String permutationId) { String name = soycDir + "/" + baseName + permutationId + ".xml.gz"; if (new File(name).exists()) { return name; } return soycDir + "/" + baseName + permutationId + ".xml"; } /** * Global information for the current permutation being emitted. */ private GlobalInformation globalInformation; /** * HTML emitter for the current permutation being emitted. */ private MakeTopLevelHtmlForPerm makeTopLevelHtmlForPerm; private final OutputDirectory outDir; public SoycDashboard(OutputDirectory outDir) { this.outDir = outDir; } public void generateCompilerMetricsForOnePermutation( ModuleMetricsArtifact moduleMetrics, PrecompilationMetricsArtifact precompilationMetrics, CompilationMetricsArtifact compilationMetrics) throws IOException { makeTopLevelHtmlForPerm.makeCompilerMetricsPermFiles(moduleMetrics, precompilationMetrics, compilationMetrics); } public void generateCrossPermutationFiles(Map> permInfo) throws IOException { StaticResources.emit(outDir); MakeTopLevelHtmlForPerm.makeTopLevelHtmlForAllPerms(permInfo, outDir); } public void generateForOnePermutation() throws IOException { if (globalInformation.dependencies != null) { makeTopLevelHtmlForPerm.makeDependenciesHtml(); } if (globalInformation.getNumFragments() > 0) { makeTopLevelHtmlForPerm.makeSplitStatusPages(); makeTopLevelHtmlForPerm.makeLeftoverStatusPages(); } for (SizeBreakdown breakdown : globalInformation.allSizeBreakdowns()) { DependencyLinker linker = chooseDependencyLinker(breakdown); makeHTMLFiles(makeTopLevelHtmlForPerm, breakdown, linker); } } public void readDependencies(InputStream stream) throws ParserConfigurationException, SAXException, IOException { globalInformation.dependencies = new TreeMap>(); DefaultHandler depHandler = parseXMLDocumentDependencies(globalInformation.dependencies); SAXParserFactory depFactoryMain = SAXParserFactory.newInstance(); depFactoryMain.setNamespaceAware(true); SAXParser saxParser = depFactoryMain.newSAXParser(); saxParser.parse(stream, depHandler); } public void readSizeMaps(InputStream stream) throws ParserConfigurationException, SAXException, IOException { DefaultHandler handler = parseXMLDocumentSizeMap(globalInformation); SAXParserFactory factoryMain = SAXParserFactory.newInstance(); factoryMain.setNamespaceAware(true); SAXParser saxParser = factoryMain.newSAXParser(); saxParser.parse(stream, handler); // Now clean up the information that has been read in various ways globalInformation.computePackageSizes(); // add to "All Other Code" if none of the special categories apply for (SizeBreakdown breakdown : globalInformation.allSizeBreakdowns()) { updateAllOtherCodeType(breakdown.nameToCodeColl); } // clean up the RPC categories for (SizeBreakdown breakdown : globalInformation.allSizeBreakdowns()) { foldInRPCHeuristic(breakdown.nameToCodeColl); } } public void readSplitPoints(InputStream stream) throws ParserConfigurationException, SAXException, IOException { DefaultHandler splitPointHandler = parseXMLDocumentSplitPoints(); SAXParserFactory splitPointsFactoryMain = SAXParserFactory.newInstance(); splitPointsFactoryMain.setNamespaceAware(true); SAXParser saxParser = splitPointsFactoryMain.newSAXParser(); saxParser.parse(stream, splitPointHandler); } public void startNewPermutation(String permutationId) { globalInformation = new GlobalInformation(permutationId); makeTopLevelHtmlForPerm = new MakeTopLevelHtmlForPerm(globalInformation, outDir); } private Collection breakdownsForFragment(Integer fragment) { List breakdowns = new ArrayList(); breakdowns.add(globalInformation.getTotalCodeBreakdown()); if (fragment == 0) { breakdowns.add(globalInformation.getInitialCodeBreakdown()); } if (fragment == (globalInformation.getNumFragments() + 1)) { breakdowns.add(globalInformation.getLeftoversBreakdown()); } if (fragment >= 1 && fragment <= globalInformation.getNumFragments()) { breakdowns.add(globalInformation.fragmentCodeBreakdown(fragment)); } return breakdowns; } private DependencyLinker chooseDependencyLinker(SizeBreakdown breakdown) { if (globalInformation.dependencies == null) { // no dependencies are available return new NullDependencyLinker(); } if (breakdown == globalInformation.getTotalCodeBreakdown()) { if (globalInformation.getNumFragments() > 0) { return makeTopLevelHtmlForPerm.new DependencyLinkerForTotalBreakdown(); } else { return makeTopLevelHtmlForPerm.new DependencyLinkerForInitialCode(); } } else if (breakdown == globalInformation.getInitialCodeBreakdown()) { return makeTopLevelHtmlForPerm.new DependencyLinkerForInitialCode(); } else if (breakdown == globalInformation.getLeftoversBreakdown()) { assert globalInformation.getNumFragments() > 0; return makeTopLevelHtmlForPerm.new DependencyLinkerForLeftoversFragment(); } else { return new NullDependencyLinker(); } } /** * Generates all the HTML files for one size breakdown. */ private void makeHTMLFiles(MakeTopLevelHtmlForPerm makeTopLevelHtmlForPerm, SizeBreakdown breakdown, DependencyLinker depLinker) throws IOException { makeTopLevelHtmlForPerm.makePackageClassesHtmls(breakdown, depLinker); makeTopLevelHtmlForPerm.makeCodeTypeClassesHtmls(breakdown); makeTopLevelHtmlForPerm.makeLiteralsClassesTableHtmls(breakdown); makeTopLevelHtmlForPerm.makeBreakdownShell(breakdown); makeTopLevelHtmlForPerm.makeTopLevelShell(); } private DefaultHandler parseXMLDocumentSizeMap( final GlobalInformation globalInformation) { return new DefaultHandler() { int fragment = -1; @Override public void endElement(String uri, String localName, String qName) { if (localName.compareTo("sizemap") == 0) { fragment = -1; } } @Override public void startElement(String uri, String localName, String qName, final Attributes attributes) { if (localName.compareTo("sizemap") == 0) { // starting a new size map String fragString = attributes.getValue("fragment"); if (fragString == null) { throw new FormatException(); } try { fragment = Integer.valueOf(fragString); } catch (NumberFormatException e) { throw new FormatException(e); } String sizeString = attributes.getValue("size"); if (sizeString == null) { throw new FormatException(); } int size; try { size = Integer.valueOf(sizeString); } catch (NumberFormatException e) { throw new FormatException(e); } for (SizeBreakdown breakdown : breakdownsForFragment(fragment)) { breakdown.sizeAllCode += size; } } else if (localName.compareTo("size") == 0) { String type = attributes.getValue("type"); if (type == null) { throw new FormatException(); } String ref = attributes.getValue("ref"); if (ref == null) { throw new FormatException(); } String sizeString = attributes.getValue("size"); if (sizeString == null) { throw new FormatException(); } int size; try { size = Integer.valueOf(sizeString); } catch (NumberFormatException e) { throw new FormatException(e); } recordSize(type, ref, size, globalInformation); } } private void accountForSize(SizeBreakdown breakdown, String refType, String ref, int size, GlobalInformation globalInformation) { if (refType.equals("string")) { LiteralsCollection stringLiterals = breakdown.nameToLitColl.get("string"); stringLiterals.size += size; stringLiterals.literals.add(ref); } else if (refType.equals("var")) { // Nothing to record, because no breakdown is provided for random // variables } else { if (!refType.equals("type") && !refType.equals("method") && !refType.equals("field")) { throw new FormatException(); } if (refType.equals("method")) { breakdown.methodToSize.put(ref, Integer.valueOf(size)); } String className = ref; if (className.contains("::")) { /* * It's a method or field reference. Discard the method/field part. */ int idx = className.indexOf(':'); className = className.substring(0, idx); } className = StringInterner.get().intern(className); // derive the package name from the class String packageName; if (!globalInformation.getClassToPackage().containsKey(className)) { packageName = className; packageName = packageName.replaceAll("\\.[A-Z].*", ""); globalInformation.getClassToPackage().put(className, packageName); } else { packageName = globalInformation.getClassToPackage().get(className); } if (!globalInformation.getPackageToClasses().containsKey(packageName)) { TreeSet insertSet = new TreeSet(); insertSet.add(className); globalInformation.getPackageToClasses().put(packageName, insertSet); } else { globalInformation.getPackageToClasses().get(packageName).add( className); } recordClassCategories(breakdown.nameToCodeColl, className, packageName); if (breakdown.classToSize.containsKey(className)) { int newSize = breakdown.classToSize.get(className) + size; breakdown.classToSize.put(className, newSize); } else { breakdown.classToSize.put(className, size); } } } private void recordClassCategories( final HashMap nameToCodeColl, String className, String packageName) { if (packageName.startsWith("java")) { nameToCodeColl.get("jre").classes.add(className); } else if (packageName.startsWith("com.google.gwt.lang")) { nameToCodeColl.get("gwtLang").classes.add(className); } if (className.contains("_CustomFieldSerializer")) { nameToCodeColl.get("rpcUser").classes.add(className); } else if (className.endsWith("_FieldSerializer") || className.endsWith("_Proxy") || className.endsWith("_TypeSerializer")) { nameToCodeColl.get("rpcGen").classes.add(className); } } private void recordSize(String refType, String ref, int size, GlobalInformation globalInformation) { refType = StringInterner.get().intern(refType); ref = StringInterner.get().intern(ref); for (SizeBreakdown breakdown : breakdownsForFragment(fragment)) { accountForSize(breakdown, refType, ref, size, globalInformation); } } }; } private DefaultHandler parseXMLDocumentSplitPoints() { DefaultHandler handler = new DefaultHandler() { private boolean inInitialLoadSequence = false; @Override public void endElement(String uri, String localName, String qName) { if (localName.compareTo("initialesq") == 0) { inInitialLoadSequence = false; } } @Override public void startElement(String nsUri, String strippedName, String tagName, final Attributes attributes) { if (strippedName.compareTo("splitpoint") == 0) { parseSplitPoint(attributes); } else if (strippedName.compareTo("initialseq") == 0) { inInitialLoadSequence = true; } else if (inInitialLoadSequence && strippedName.compareTo("splitpointref") == 0) { globalInformation.getInitialFragmentLoadSequence().add( parseSplitPointReference(attributes)); } } /** * Parses a split point entry from a splitpoints XML soyc file. * A split point node as in \ * * @param attributes the attributes of the splitpoint node (provided by the SAX parsing * infrastructure) */ private void parseSplitPoint(final Attributes attributes) { if (attributes.getValue("id") != null) { String curSplitPoint = attributes.getValue("id"); if (attributes.getValue("location") != null) { String curSplitPointLocation = attributes.getValue("location"); curSplitPointLocation = curSplitPointLocation.replaceAll("\\(L.*", ""); globalInformation.addFragmentDescriptor( Integer.parseInt(curSplitPoint), curSplitPointLocation); } } } private Integer parseSplitPointReference(final Attributes attributes) { String spString = attributes.getValue("id"); if (spString == null) { throw new FormatException("Could not parse split point reference"); } return Integer.valueOf(spString); } }; return handler; } private void readFromFilesNamed(String storiesFileName, String dependenciesFileName, String splitPointsFileName) throws ParserConfigurationException, SAXException, IOException { if (dependenciesFileName != null && new File(dependenciesFileName).exists()) { readDependencies(openPossiblyGzippedFile(dependenciesFileName)); } if (splitPointsFileName != null && new File(splitPointsFileName).exists()) { readSplitPoints(openPossiblyGzippedFile(splitPointsFileName)); } readSizeMaps(openPossiblyGzippedFile(storiesFileName)); } /* * assigns code to "all other code" if none of the special categories apply */ private void updateAllOtherCodeType( final HashMap nameToCodeColl) { // all classes not in any of the other categories for (String className : globalInformation.getClassToPackage().keySet()) { if ((!nameToCodeColl.get("widget").classes.contains(className)) && (!nameToCodeColl.get("rpcUser").classes.contains(className)) && (!nameToCodeColl.get("rpcGwt").classes.contains(className)) && (!nameToCodeColl.get("rpcGen").classes.contains(className)) && (!nameToCodeColl.get("jre").classes.contains(className)) && (!nameToCodeColl.get("gwtLang").classes.contains(className))) { nameToCodeColl.get("allOther").classes.add(className); } } } }




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