// -*- mode: java; c-basic-offset: 2; -*-
// Copyright 2009-2011 Google, All Rights reserved
// Copyright 2011-2018 MIT, All rights reserved
// Released under the Apache License, Version 2.0
// http://www.apache.org/licenses/LICENSE-2.0
package com.google.appinventor.components.runtime;

import android.content.Context;
import android.content.Intent;

import android.os.Bundle;
import android.os.Environment;
import android.os.Looper;

import android.util.Log;

import android.view.Menu;
import android.view.MenuItem.OnMenuItemClickListener;
import android.view.MenuItem;

import android.widget.Toast;

import com.google.appinventor.common.version.AppInventorFeatures;

import com.google.appinventor.components.annotations.SimpleObject;
import com.google.appinventor.components.annotations.SimpleProperty;

import com.google.appinventor.components.common.ComponentConstants;

import com.google.appinventor.components.runtime.util.AppInvHTTPD;
import com.google.appinventor.components.runtime.util.ErrorMessages;
import com.google.appinventor.components.runtime.util.RetValManager;
import com.google.appinventor.components.runtime.util.WebRTCNativeMgr;

import dalvik.system.DexClassLoader;

import gnu.expr.Language;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Random;
import java.util.Set;

import kawa.standard.Scheme;


/**
 * Subclass of Form used by the 'stem cell apk', i.e. the Android app that allows communication
 * via the Repl
 *
 * @author markf@google.com (Mark Friedman)
 */

public class ReplForm extends Form {

  private static final String LOG_TAG = ReplForm.class.getSimpleName();
  private AppInvHTTPD httpdServer = null;
  private AppInvHTTPD aiStarterServer = null;
  public static ReplForm topform;
  public static final String REPL_ASSET_DIR =
    Environment.getExternalStorageDirectory().getAbsolutePath() +
    "/AppInventor/assets/";
  private static final String REPL_COMP_DIR = REPL_ASSET_DIR + "external_comps/";
  private boolean IsUSBRepl = false;
  private boolean assetsLoaded = false;
  private boolean isDirect = true; // True for USB and emulator (AI2)
  private Object replResult = null; // Return result when closing screen in Repl
  private String replResultFormName = null;
  private List<String> loadedExternalDexs; // keep a track of loaded dexs to prevent reloading and causing crash in older APIs
  private String currentTheme = ComponentConstants.DEFAULT_THEME;
  private WebRTCNativeMgr webRTCNativeMgr;

  SchemeInterface schemeInterface = new SchemeInterface();

  private static final String SPLASH_ACTIVITY_CLASS = SplashActivity.class
      .getName();

  public ReplForm() {
    super();
    topform = this;
  }

  public class SchemeInterface {
    Language scheme = Scheme.getInstance("scheme");

    public SchemeInterface() {
      gnu.expr.ModuleExp.mustNeverCompile();
    }

    private void adoptMainThreadClassLoader() {
      ClassLoader mainClassLoader = Looper.getMainLooper().getThread().getContextClassLoader();
      Thread myThread = Thread.currentThread();
      if (myThread.getContextClassLoader() != mainClassLoader) {
        myThread.setContextClassLoader(mainClassLoader);
      }
    }

    public void eval(final String sexp) {
      runOnUiThread(new Runnable() {
          @Override public void run() {
            try {
              adoptMainThreadClassLoader();
              if (sexp.equals("#DONE#")) {
                ReplForm.this.finish();
                return;
              }
              scheme.eval(sexp);
            } catch (Throwable e) {
              Log.e(LOG_TAG, "Exception in scheme processing", e);
            }
          }
        });
    }
  }

  @Override
  public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    Log.d(LOG_TAG, "onCreate");
    loadedExternalDexs = new ArrayList<String>();
    Intent intent = getIntent();
    processExtras(intent, false);
    themeHelper.setActionBarAnimation(false);
  }

  @Override
  void onCreateFinish() {
    super.onCreateFinish();

    if (!isEmulator() && AppInventorFeatures.doCompanionSplashScreen())
      {                    // Only show REPL splash if not in emulator and enabled
        Intent webviewIntent = new Intent(Intent.ACTION_MAIN);
        webviewIntent.setClassName(activeForm.$context(), SPLASH_ACTIVITY_CLASS);
        activeForm.$context().startActivity(webviewIntent);
      }
  }

  @Override
  protected void onResume() {
    super.onResume();
  }

  @Override
  protected void onStop() {
    super.onStop();
  }

  @Override
  protected void onDestroy() {
    super.onDestroy();
    if (httpdServer != null) {
        httpdServer.stop();
        httpdServer = null;
        aiStarterServer.stop();
        aiStarterServer = null;
    }
    finish();                   // Must really exit here, so if you hits the back button we terminate completely.
    System.exit(0);
  }

  @Override
  protected void startNewForm(String nextFormName, Object startupValue) {
    if (startupValue != null) {
      this.startupValue = jsonEncodeForForm(startupValue, "open another screen with start value");
    }
    RetValManager.pushScreen(nextFormName, startupValue);
  }

  public void setFormName(String formName) {
    this.formName = formName;
    Log.d(LOG_TAG, "formName is now " + formName);
  }

  @Override
  protected void closeForm(Intent resultIntent) {
    RetValManager.popScreen("Not Yet");
  }

  protected void setResult(Object result) {
    Log.d(LOG_TAG, "setResult: " + result);
    replResult = result;
    replResultFormName = formName;
  }

  @Override
  protected void closeApplicationFromBlocks() {
    // Switching forms is not allowed in REPL (yet?).
    runOnUiThread(new Runnable() {
      public void run() {
        String message = "Closing forms is not currently supported during development.";
        Toast.makeText(ReplForm.this, message, Toast.LENGTH_LONG).show();
      }
    });
  }

  // Configure the system menu to include items to kill the application and to show "about"
  // information and providing the "Settings" menu option.

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // This procedure is called only once.  To change the items dynamically
    // we would use onPrepareOptionsMenu.
    super.onCreateOptionsMenu(menu); // sets up the exit and about buttons
    addSettingsButton(menu);         // Now add our button!
    addLogcatButton(menu);           // Add button to report LogCat information
    return true;
  }

  public void addSettingsButton(Menu menu) {
    MenuItem showSettingsItem = menu.add(Menu.NONE, Menu.NONE, 3,
      "Settings").setOnMenuItemClickListener(new OnMenuItemClickListener() {
          @Override
          public boolean onMenuItemClick(MenuItem item) {
            PhoneStatus.doSettings();
            return true;
          }
        });
    showSettingsItem.setIcon(android.R.drawable.sym_def_app_icon);
  }

  public void addLogcatButton(Menu menu) {
    if (!ReplApplication.isAcraActive()) { // If ACRA isn't active
      return;                              // we don't show the button
    }
    MenuItem showSettingsItem = menu.add(Menu.NONE, Menu.NONE, 4,
      "Send Error Report").setOnMenuItemClickListener(new OnMenuItemClickListener() {
          @Override
          public boolean onMenuItemClick(MenuItem item) {
            String reportId = genReportId();
            ReplApplication.reportError(null, reportId);
            Notifier.oneButtonAlert(activeForm, "Your Report Id is: " + reportId +
              "<br />Use this ID when reporting this error.", "Error Report Id", "OK");
            return true;
          }
        });
    showSettingsItem.setIcon(android.R.drawable.stat_sys_warning);
  }

  @Override
  protected void onNewIntent(Intent intent) {
    super.onNewIntent(intent);
    Log.d(LOG_TAG, "onNewIntent Called");
    processExtras(intent, true);
  }

  void HandleReturnValues() {
    Log.d(LOG_TAG, "HandleReturnValues() Called, replResult = " + replResult);
    if (replResult != null) {   // Act as if it was returned
      OtherScreenClosed(replResultFormName, replResult);
      Log.d(LOG_TAG, "Called OtherScreenClosed");
      replResult = null;
    }
  }

  protected void processExtras(Intent intent, boolean restart) {
    Bundle extras = intent.getExtras();
    if (extras != null) {
      Log.d(LOG_TAG, "extras: " + extras);
      Iterator<String> keys = extras.keySet().iterator();
      while (keys.hasNext()) {
        Log.d(LOG_TAG, "Extra Key: " + keys.next());
      }
    }
    if ((extras != null) && extras.getBoolean("rundirect")) {
      Log.d(LOG_TAG, "processExtras rundirect is true and restart is " + restart);
      isDirect = true;
      assetsLoaded = true;
      if (restart) {
        this.clear();
        if (httpdServer != null) {
          httpdServer.resetSeq();
        } else {                // User manually started the Companion on her phone
          startHTTPD(true);     // but never typed in the UI and then connected via
          httpdServer.setHmacKey("emulator"); // USB. This is an ugly hack
        }
      }
    }
  }

  public boolean isDirect() {
    return isDirect;
  }

  public void setIsUSBrepl() {
    IsUSBRepl = true;
  }

  // Called from the Phone Status Block to start the Repl HTTPD
  public void startHTTPD(boolean secure) {
    try {
        if (httpdServer == null) {
            checkAssetDir();
            httpdServer = new AppInvHTTPD(8001, new File(REPL_ASSET_DIR), secure, this); // Probably should make the port variable
            Log.i(LOG_TAG, "started AppInvHTTPD");
            aiStarterServer = new AppInvHTTPD(8004, new File(REPL_ASSET_DIR), secure, this); // Probably should make the port variable
            Log.i(LOG_TAG, "started aiStarterServer");
        }
    } catch (IOException ex) {
      Log.e(LOG_TAG, "Setting up NanoHTTPD: " + ex.toString());
    }
  }

  // Make sure that the REPL asset directory exists.
  private void checkAssetDir() {
    File f = new File(REPL_ASSET_DIR);
    if (!f.exists())
        f.mkdirs();             // Create the directory and all parents
  }

  private boolean checkComponentDir() {
    File f = new File(REPL_COMP_DIR);
    if (!f.exists())
      return f.mkdirs();
    return true;
  }

  // We return true if the assets for the Companion have been loaded and
  // displayed so we should look for all future assets in the sdcard which
  // is where assets are placed for the companion.
  // We return false until setAssetsLoaded is called which is done
  // by the phone status block
  public boolean isAssetsLoaded() {
    return assetsLoaded;
  }

  public void setAssetsLoaded() {
    assetsLoaded = true;
  }

  /**
   * This is a nasty hack. For loading external component's dex file so that they can be accessible for
   * kawa to load it, when required. This assumes classloader checks class via delegation through the parent
   * classloaders. For multiple dex files, we just cascade the classloaders in the hierarchy
   */
  public void loadComponents(List<String> extensionNames) {
    Set<String> extensions = new HashSet<String>(extensionNames);
    // Store the loaded dex files in the private storage of the App for stable optimization
    File dexOutput = activeForm.$context().getDir("componentDexs", Context.MODE_PRIVATE);
    File componentFolder = new File(REPL_COMP_DIR );
    if (!checkComponentDir()) {
      Log.d(LOG_TAG, "Unable to create components directory");
      dispatchErrorOccurredEventDialog(this, "loadComponents", ErrorMessages.ERROR_EXTENSION_ERROR,
          1, "App Inventor", "Unable to create component directory.");
      return;
    }
    // Current Thread Class Loader
    ClassLoader parentClassLoader = ReplForm.class.getClassLoader();
    StringBuilder sb = new StringBuilder();
    loadedExternalDexs.clear();
    for (File compFolder : componentFolder.listFiles()) {
      if (compFolder.isDirectory()) {
        if (!extensions.contains(compFolder.getName())) continue;  // Skip extensions on the phone but not required by the project
        File component = new File(compFolder.getPath() + File.separator + "classes.jar");
        File loadComponent = new File(compFolder.getPath() + File.separator + compFolder.getName() + ".jar");
        component.renameTo(loadComponent);
        if (loadComponent.exists() && !loadedExternalDexs.contains(loadComponent.getName())) {
          Log.d(LOG_TAG, "Loading component dex " + loadComponent.getAbsolutePath());
          loadedExternalDexs.add(loadComponent.getName());
          sb.append(File.pathSeparatorChar);
          sb.append(loadComponent.getAbsolutePath());
        }
      }
    }
    DexClassLoader dexCloader = new DexClassLoader(sb.substring(1), dexOutput.getAbsolutePath(),
        null, parentClassLoader);
    Thread.currentThread().setContextClassLoader(dexCloader);
    Log.d(LOG_TAG, Thread.currentThread().toString());
    Log.d(LOG_TAG, Looper.getMainLooper().getThread().toString());
    Looper.getMainLooper().getThread().setContextClassLoader(dexCloader);
  }

  @Override
  @SimpleProperty(userVisible = false)
  public void Theme(String theme) {
    currentTheme = theme;
    super.Theme(theme);
    updateTitle();
  }

  public static void returnRetvals(final String retvals) {
    final ReplForm form = (ReplForm)activeForm;
    Log.d(LOG_TAG, "returnRetvals: " + retvals);
    form.sendToCompanion(retvals);
  }

  public void sendToCompanion(String data) {
    if (webRTCNativeMgr == null) {
      Log.i(LOG_TAG, "No WebRTCNativeMgr!");
      return;
    }
    webRTCNativeMgr.send(data);
  }

  public void setWebRTCMgr(WebRTCNativeMgr mgr) {
    webRTCNativeMgr = mgr;
  }

  public void evalScheme(String sexp) {
    schemeInterface.eval(sexp);
  }

  @Override
  public String getAssetPath(String asset) {
    return "file://" + REPL_ASSET_DIR + asset;
  }

  @Override
  public String getAssetPathForExtension(Component component, String asset) throws FileNotFoundException {
    // For testing extensions, we allow external = false, but still compile the assets into the
    // companion for testing. When external = true, we are assuming this is an extension loaded
    // into the production companion.
    SimpleObject annotation = component.getClass().getAnnotation(SimpleObject.class);
    if (annotation != null && !annotation.external()) {
      return ASSETS_PREFIX + asset;
    }

    String extensionId = component.getClass().getName();
    String pkgPath = null;

    while (extensionId.contains(".")) {
      File dir = new File(REPL_COMP_DIR + extensionId + "/assets");
      if (dir.exists() && dir.isDirectory()) {
        // found the extension directory
        pkgPath = dir.getAbsolutePath();
        break;
      }

      // Walk up the FQCN to determine possible extension identifier
      extensionId = extensionId.substring(0, extensionId.lastIndexOf('.'));
    }
    if (pkgPath != null) {
      File result = new File(pkgPath, asset);
      Log.d(LOG_TAG, "result = " + result.getAbsolutePath());
      if (result.exists()) {
        return "file://" + result.getAbsolutePath();
      }
    }
    throw new FileNotFoundException();
  }

  @Override
  protected boolean isRepl() {
    return true;
  }

  @Override
  protected void updateTitle() {
    themeHelper.setTitle(title, "AppTheme.Light".equals(currentTheme));
  }

  private String genReportId() {
    String [] words = { "A","ABE","ACE","ACT","AD","ADA","ADD",
                        "AGO","AID","AIM","AIR","ALL","ALP","AM","AMY",
                        "AN","ANA","AND","ANN","ANT","ANY","APE","APS",
                        "APT","ARC","ARE","ARK","ARM","ART","AS","ASH",
                        "ASK","AT","ATE","AUG","AUK","AVE","AWE","AWK",
                        "AWL","AWN","AX","AYE","BAD","BAG","BAH","BAM",
                        "BAN","BAR","BAT","BAY","BE","BED","BEE","BEG",
                        "BEN","BET","BEY","BIB","BID","BIG","BIN","BIT",
                        "BOB","BOG","BON","BOO","BOP","BOW","BOY","BUB",
                        "BUD","BUG","BUM","BUN","BUS","BUT","BUY","BY",
                        "BYE","CAB","CAL","CAM","CAN","CAP","CAR","CAT",
                        "CAW","COD","COG","COL","CON","COO","COP","COT",
                        "COW","COY","CRY","CUB","CUE","CUP","CUR","CUT",
                        "DAB","DAD","DAM","DAN","DAR","DAY","DEE","DEL",
                        "DEN","DES","DEW","DID","DIE","DIG","DIN","DIP",
                        "DO","DOE","DOG","DON","DOT","DOW","DRY","DUB",
                        "DUD","DUE","DUG","DUN","EAR","EAT","ED","EEL",
                        "EGG","EGO","ELI","ELK","ELM","ELY","EM","END",
                        "EST","ETC","EVA","EVE","EWE","EYE","FAD","FAN",
                        "FAR","FAT","FAY","FED","FEE","FEW","FIB","FIG",
                        "FIN","FIR","FIT","FLO","FLY","FOE","FOG","FOR",
                        "FRY","FUM","FUN","FUR","GAB","GAD","GAG","GAL",
                        "GAM","GAP","GAS","GAY","GEE","GEL","GEM","GET",
                        "GIG","GIL","GIN","GO","GOT","GUM","GUN","GUS",
                        "GUT","GUY","GYM","GYP","HA","HAD","HAL","HAM",
                        "HAN","HAP","HAS","HAT","HAW","HAY","HE","HEM",
                        "HEN","HER","HEW","HEY","HI","HID","HIM","HIP",
                        "HIS","HIT","HO","HOB","HOC","HOE","HOG","HOP",
                        "HOT","HOW","HUB","HUE","HUG","HUH","HUM","HUT",
                        "I","ICY","IDA","IF","IKE","ILL","INK","INN",
                        "IO","ION","IQ","IRA","IRE","IRK","IS","IT",
                        "ITS","IVY","JAB","JAG","JAM","JAN","JAR","JAW",
                        "JAY","JET","JIG","JIM","JO","JOB","JOE","JOG",
                        "JOT","JOY","JUG","JUT","KAY","KEG","KEN","KEY",
                        "KID","KIM","KIN","KIT","LA","LAB","LAC","LAD",
                        "LAG","LAM","LAP","LAW","LAY","LEA","LED","LEE",
                        "LEG","LEN","LEO","LET","LEW","LID","LIE","LIN",
                        "LIP","LIT","LO","LOB","LOG","LOP","LOS","LOT",
                        "LOU","LOW","LOY","LUG","LYE","MA","MAC","MAD",
                        "MAE","MAN","MAO","MAP","MAT","MAW","MAY","ME",
                        "MEG","MEL","MEN","MET","MEW","MID","MIN","MIT",
                        "MOB","MOD","MOE","MOO","MOP","MOS","MOT","MOW",
                        "MUD","MUG","MUM","MY","NAB","NAG","NAN","NAP",
                        "NAT","NAY","NE","NED","NEE","NET","NEW","NIB",
                        "NIL","NIP","NIT","NO","NOB","NOD","NON","NOR",
                        "NOT","NOV","NOW","NU","NUN","NUT","O","OAF",
                        "OAK","OAR","OAT","ODD","ODE","OF","OFF","OFT",
                        "OH","OIL","OK","OLD","ON","ONE","OR","ORB",
                        "ORE","ORR","OS","OTT","OUR","OUT","OVA","OW",
                        "OWE","OWL","OWN","OX","PA","PAD","PAL","PAM",
                        "PAN","PAP","PAR","PAT","PAW","PAY","PEA","PEG",
                        "PEN","PEP","PER","PET","PEW","PHI","PI","PIE",
                        "PIN","PIT","PLY","PO","POD","POE","POP","POT",
                        "POW","PRO","PRY","PUB","PUG","PUN","PUP","PUT",
                        "QUO","RAG","RAM","RAN","RAP","RAT","RAW","RAY",
                        "REB","RED","REP","RET","RIB","RID","RIG","RIM",
                        "RIO","RIP","ROB","ROD","ROE","RON","ROT","ROW",
                        "ROY","RUB","RUE","RUG","RUM","RUN","RYE","SAC",
                        "SAD","SAG","SAL","SAM","SAN","SAP","SAT","SAW",
                        "SAY","SEA","SEC","SEE","SEN","SET","SEW","SHE",
                        "SHY","SIN","SIP","SIR","SIS","SIT","SKI","SKY",
                        "SLY","SO","SOB","SOD","SON","SOP","SOW","SOY",
                        "SPA","SPY","SUB","SUD","SUE","SUM","SUN","SUP",
                        "TAB","TAD","TAG","TAN","TAP","TAR","TEA","TED",
                        "TEE","TEN","THE","THY","TIC","TIE","TIM","TIN",
                        "TIP","TO","TOE","TOG","TOM","TON","TOO","TOP",
                        "TOW","TOY","TRY","TUB","TUG","TUM","TUN","TWO",
                        "UN","UP","US","USE","VAN","VAT","VET","VIE",
                        "WAD","WAG","WAR","WAS","WAY","WE","WEB","WED",
                        "WEE","WET","WHO","WHY","WIN","WIT","WOK","WON",
                        "WOO","WOW","WRY","WU","YAM","YAP","YAW","YE",
                        "YEA","YES","YET","YOU","ABED","ABEL","ABET","ABLE",
                        "ABUT","ACHE","ACID","ACME","ACRE","ACTA","ACTS","ADAM",
                        "ADDS","ADEN","AFAR","AFRO","AGEE","AHEM","AHOY","AIDA",
                        "AIDE","AIDS","AIRY","AJAR","AKIN","ALAN","ALEC","ALGA",
                        "ALIA","ALLY","ALMA","ALOE","ALSO","ALTO","ALUM","ALVA",
                        "AMEN","AMES","AMID","AMMO","AMOK","AMOS","AMRA","ANDY",
                        "ANEW","ANNA","ANNE","ANTE","ANTI","AQUA","ARAB","ARCH",
                        "AREA","ARGO","ARID","ARMY","ARTS","ARTY","ASIA","ASKS",
                        "ATOM","AUNT","AURA","AUTO","AVER","AVID","AVIS","AVON",
                        "AVOW","AWAY","AWRY","BABE","BABY","BACH","BACK","BADE",
                        "BAIL","BAIT","BAKE","BALD","BALE","BALI","BALK","BALL",
                        "BALM","BAND","BANE","BANG","BANK","BARB","BARD","BARE",
                        "BARK","BARN","BARR","BASE","BASH","BASK","BASS","BATE",
                        "BATH","BAWD","BAWL","BEAD","BEAK","BEAM","BEAN","BEAR",
                        "BEAT","BEAU","BECK","BEEF","BEEN","BEER","BEET","BELA",
                        "BELL","BELT","BEND","BENT","BERG","BERN","BERT","BESS",
                        "BEST","BETA","BETH","BHOY","BIAS","BIDE","BIEN","BILE",
                        "BILK","BILL","BIND","BING","BIRD","BITE","BITS","BLAB",
                        "BLAT","BLED","BLEW","BLOB","BLOC","BLOT","BLOW","BLUE",
                        "BLUM","BLUR","BOAR","BOAT","BOCA","BOCK","BODE","BODY",
                        "BOGY","BOHR","BOIL","BOLD","BOLO","BOLT","BOMB","BONA",
                        "BOND","BONE","BONG","BONN","BONY","BOOK","BOOM","BOON",
                        "BOOT","BORE","BORG","BORN","BOSE","BOSS","BOTH","BOUT",
                        "BOWL","BOYD","BRAD","BRAE","BRAG","BRAN","BRAY","BRED",
                        "BREW","BRIG","BRIM","BROW","BUCK","BUDD","BUFF","BULB",
                        "BULK","BULL","BUNK","BUNT","BUOY","BURG","BURL","BURN",
                        "BURR","BURT","BURY","BUSH","BUSS","BUST","BUSY","BYTE",
                        "CADY","CAFE","CAGE","CAIN","CAKE","CALF","CALL","CALM",
                        "CAME","CANE","CANT","CARD","CARE","CARL","CARR","CART",
                        "CASE","CASH","CASK","CAST","CAVE","CEIL","CELL","CENT",
                        "CERN","CHAD","CHAR","CHAT","CHAW","CHEF","CHEN","CHEW",
                        "CHIC","CHIN","CHOU","CHOW","CHUB","CHUG","CHUM","CITE",
                        "CITY","CLAD","CLAM","CLAN","CLAW","CLAY","CLOD","CLOG",
                        "CLOT","CLUB","CLUE","COAL","COAT","COCA","COCK","COCO",
                        "CODA","CODE","CODY","COED","COIL","COIN","COKE","COLA",
                        "COLD","COLT","COMA","COMB","COME","COOK","COOL","COON",
                        "COOT","CORD","CORE","CORK","CORN","COST","COVE","COWL",
                        "CRAB","CRAG","CRAM","CRAY","CREW","CRIB","CROW","CRUD",
                        "CUBA","CUBE","CUFF","CULL","CULT","CUNY","CURB","CURD",
                        "CURE","CURL","CURT","CUTS","DADE","DALE","DAME","DANA",
                        "DANE","DANG","DANK","DARE","DARK","DARN","DART","DASH",
                        "DATA","DATE","DAVE","DAVY","DAWN","DAYS","DEAD","DEAF",
                        "DEAL","DEAN","DEAR","DEBT","DECK","DEED","DEEM","DEER",
                        "DEFT","DEFY","DELL","DENT","DENY","DESK","DIAL","DICE",
                        "DIED","DIET","DIME","DINE","DING","DINT","DIRE","DIRT",
                        "DISC","DISH","DISK","DIVE","DOCK","DOES","DOLE","DOLL",
                        "DOLT","DOME","DONE","DOOM","DOOR","DORA","DOSE","DOTE",
                        "DOUG","DOUR","DOVE","DOWN","DRAB","DRAG","DRAM","DRAW",
                        "DREW","DRUB","DRUG","DRUM","DUAL","DUCK","DUCT","DUEL",
                        "DUET","DUKE","DULL","DUMB","DUNE","DUNK","DUSK","DUST",
                        "DUTY","EACH","EARL","EARN","EASE","EAST","EASY","EBEN",
                        "ECHO","EDDY","EDEN","EDGE","EDGY","EDIT","EDNA","EGAN",
                        "ELAN","ELBA","ELLA","ELSE","EMIL","EMIT","EMMA","ENDS",
                        "ERIC","EROS","EVEN","EVER","EVIL","EYED","FACE","FACT",
                        "FADE","FAIL","FAIN","FAIR","FAKE","FALL","FAME","FANG",
                        "FARM","FAST","FATE","FAWN","FEAR","FEAT","FEED","FEEL",
                        "FEET","FELL","FELT","FEND","FERN","FEST","FEUD","FIEF",
                        "FIGS","FILE","FILL","FILM","FIND","FINE","FINK","FIRE",
                        "FIRM","FISH","FISK","FIST","FITS","FIVE","FLAG","FLAK",
                        "FLAM","FLAT","FLAW","FLEA","FLED","FLEW","FLIT","FLOC",
                        "FLOG","FLOW","FLUB","FLUE","FOAL","FOAM","FOGY","FOIL",
                        "FOLD","FOLK","FOND","FONT","FOOD","FOOL","FOOT","FORD",
                        "FORE","FORK","FORM","FORT","FOSS","FOUL","FOUR","FOWL",
                        "FRAU","FRAY","FRED","FREE","FRET","FREY","FROG","FROM",
                        "FUEL","FULL","FUME","FUND","FUNK","FURY","FUSE","FUSS",
                        "GAFF","GAGE","GAIL","GAIN","GAIT","GALA","GALE","GALL",
                        "GALT","GAME","GANG","GARB","GARY","GASH","GATE","GAUL",
                        "GAUR","GAVE","GAWK","GEAR","GELD","GENE","GENT","GERM",
                        "GETS","GIBE","GIFT","GILD","GILL","GILT","GINA","GIRD",
                        "GIRL","GIST","GIVE","GLAD","GLEE","GLEN","GLIB","GLOB",
                        "GLOM","GLOW","GLUE","GLUM","GLUT","GOAD","GOAL","GOAT",
                        "GOER","GOES","GOLD","GOLF","GONE","GONG","GOOD","GOOF",
                        "GORE","GORY","GOSH","GOUT","GOWN","GRAB","GRAD","GRAY",
                        "GREG","GREW","GREY","GRID","GRIM","GRIN","GRIT","GROW",
                        "GRUB","GULF","GULL","GUNK","GURU","GUSH","GUST","GWEN",
                        "GWYN","HAAG","HAAS","HACK","HAIL","HAIR","HALE","HALF",
                        "HALL","HALO","HALT","HAND","HANG","HANK","HANS","HARD",
                        "HARK","HARM","HART","HASH","HAST","HATE","HATH","HAUL",
                        "HAVE","HAWK","HAYS","HEAD","HEAL","HEAR","HEAT","HEBE",
                        "HECK","HEED","HEEL","HEFT","HELD","HELL","HELM","HERB",
                        "HERD","HERE","HERO","HERS","HESS","HEWN","HICK","HIDE",
                        "HIGH","HIKE","HILL","HILT","HIND","HINT","HIRE","HISS",
                        "HIVE","HOBO","HOCK","HOFF","HOLD","HOLE","HOLM","HOLT",
                        "HOME","HONE","HONK","HOOD","HOOF","HOOK","HOOT","HORN",
                        "HOSE","HOST","HOUR","HOVE","HOWE","HOWL","HOYT","HUCK",
                        "HUED","HUFF","HUGE","HUGH","HUGO","HULK","HULL","HUNK",
                        "HUNT","HURD","HURL","HURT","HUSH","HYDE","HYMN","IBIS",
                        "ICON","IDEA","IDLE","IFFY","INCA","INCH","INTO","IONS",
                        "IOTA","IOWA","IRIS","IRMA","IRON","ISLE","ITCH","ITEM",
                        "IVAN","JACK","JADE","JAIL","JAKE","JANE","JAVA","JEAN",
                        "JEFF","JERK","JESS","JEST","JIBE","JILL","JILT","JIVE",
                        "JOAN","JOBS","JOCK","JOEL","JOEY","JOHN","JOIN","JOKE",
                        "JOLT","JOVE","JUDD","JUDE","JUDO","JUDY","JUJU","JUKE",
                        "JULY","JUNE","JUNK","JUNO","JURY","JUST","JUTE","KAHN",
                        "KALE","KANE","KANT","KARL","KATE","KEEL","KEEN","KENO",
                        "KENT","KERN","KERR","KEYS","KICK","KILL","KIND","KING",
                        "KIRK","KISS","KITE","KLAN","KNEE","KNEW","KNIT","KNOB",
                        "KNOT","KNOW","KOCH","KONG","KUDO","KURD","KURT","KYLE",
                        "LACE","LACK","LACY","LADY","LAID","LAIN","LAIR","LAKE",
                        "LAMB","LAME","LAND","LANE","LANG","LARD","LARK","LASS",
                        "LAST","LATE","LAUD","LAVA","LAWN","LAWS","LAYS","LEAD",
                        "LEAF","LEAK","LEAN","LEAR","LEEK","LEER","LEFT","LEND",
                        "LENS","LENT","LEON","LESK","LESS","LEST","LETS","LIAR",
                        "LICE","LICK","LIED","LIEN","LIES","LIEU","LIFE","LIFT",
                        "LIKE","LILA","LILT","LILY","LIMA","LIMB","LIME","LIND",
                        "LINE","LINK","LINT","LION","LISA","LIST","LIVE","LOAD",
                        "LOAF","LOAM","LOAN","LOCK","LOFT","LOGE","LOIS","LOLA",
                        "LONE","LONG","LOOK","LOON","LOOT","LORD","LORE","LOSE",
                        "LOSS","LOST","LOUD","LOVE","LOWE","LUCK","LUCY","LUGE",
                        "LUKE","LULU","LUND","LUNG","LURA","LURE","LURK","LUSH",
                        "LUST","LYLE","LYNN","LYON","LYRA","MACE","MADE","MAGI",
                        "MAID","MAIL","MAIN","MAKE","MALE","MALI","MALL","MALT",
                        "MANA","MANN","MANY","MARC","MARE","MARK","MARS","MART",
                        "MARY","MASH","MASK","MASS","MAST","MATE","MATH","MAUL",
                        "MAYO","MEAD","MEAL","MEAN","MEAT","MEEK","MEET","MELD",
                        "MELT","MEMO","MEND","MENU","MERT","MESH","MESS","MICE",
                        "MIKE","MILD","MILE","MILK","MILL","MILT","MIMI","MIND",
                        "MINE","MINI","MINK","MINT","MIRE","MISS","MIST","MITE",
                        "MITT","MOAN","MOAT","MOCK","MODE","MOLD","MOLE","MOLL",
                        "MOLT","MONA","MONK","MONT","MOOD","MOON","MOOR","MOOT",
                        "MORE","MORN","MORT","MOSS","MOST","MOTH","MOVE","MUCH",
                        "MUCK","MUDD","MUFF","MULE","MULL","MURK","MUSH","MUST",
                        "MUTE","MUTT","MYRA","MYTH","NAGY","NAIL","NAIR","NAME",
                        "NARY","NASH","NAVE","NAVY","NEAL","NEAR","NEAT","NECK",
                        "NEED","NEIL","NELL","NEON","NERO","NESS","NEST","NEWS",
                        "NEWT","NIBS","NICE","NICK","NILE","NINA","NINE","NOAH",
                        "NODE","NOEL","NOLL","NONE","NOOK","NOON","NORM","NOSE",
                        "NOTE","NOUN","NOVA","NUDE","NULL","NUMB","OATH","OBEY",
                        "OBOE","ODIN","OHIO","OILY","OINT","OKAY","OLAF","OLDY",
                        "OLGA","OLIN","OMAN","OMEN","OMIT","ONCE","ONES","ONLY",
                        "ONTO","ONUS","ORAL","ORGY","OSLO","OTIS","OTTO","OUCH",
                        "OUST","OUTS","OVAL","OVEN","OVER","OWLY","OWNS","QUAD",
                        "QUIT","QUOD","RACE","RACK","RACY","RAFT","RAGE","RAID",
                        "RAIL","RAIN","RAKE","RANK","RANT","RARE","RASH","RATE",
                        "RAVE","RAYS","READ","REAL","REAM","REAR","RECK","REED",
                        "REEF","REEK","REEL","REID","REIN","RENA","REND","RENT",
                        "REST","RICE","RICH","RICK","RIDE","RIFT","RILL","RIME",
                        "RING","RINK","RISE","RISK","RITE","ROAD","ROAM","ROAR",
                        "ROBE","ROCK","RODE","ROIL","ROLL","ROME","ROOD","ROOF",
                        "ROOK","ROOM","ROOT","ROSA","ROSE","ROSS","ROSY","ROTH",
                        "ROUT","ROVE","ROWE","ROWS","RUBE","RUBY","RUDE","RUDY",
                        "RUIN","RULE","RUNG","RUNS","RUNT","RUSE","RUSH","RUSK",
                        "RUSS","RUST","RUTH","SACK","SAFE","SAGE","SAID","SAIL",
                        "SALE","SALK","SALT","SAME","SAND","SANE","SANG","SANK",
                        "SARA","SAUL","SAVE","SAYS","SCAN","SCAR","SCAT","SCOT",
                        "SEAL","SEAM","SEAR","SEAT","SEED","SEEK","SEEM","SEEN",
                        "SEES","SELF","SELL","SEND","SENT","SETS","SEWN","SHAG",
                        "SHAM","SHAW","SHAY","SHED","SHIM","SHIN","SHOD","SHOE",
                        "SHOT","SHOW","SHUN","SHUT","SICK","SIDE","SIFT","SIGH",
                        "SIGN","SILK","SILL","SILO","SILT","SINE","SING","SINK",
                        "SIRE","SITE","SITS","SITU","SKAT","SKEW","SKID","SKIM",
                        "SKIN","SKIT","SLAB","SLAM","SLAT","SLAY","SLED","SLEW",
                        "SLID","SLIM","SLIT","SLOB","SLOG","SLOT","SLOW","SLUG",
                        "SLUM","SLUR","SMOG","SMUG","SNAG","SNOB","SNOW","SNUB",
                        "SNUG","SOAK","SOAR","SOCK","SODA","SOFA","SOFT","SOIL",
                        "SOLD","SOME","SONG","SOON","SOOT","SORE","SORT","SOUL",
                        "SOUR","SOWN","STAB","STAG","STAN","STAR","STAY","STEM",
                        "STEW","STIR","STOW","STUB","STUN","SUCH","SUDS","SUIT",
                        "SULK","SUMS","SUNG","SUNK","SURE","SURF","SWAB","SWAG",
                        "SWAM","SWAN","SWAT","SWAY","SWIM","SWUM","TACK","TACT",
                        "TAIL","TAKE","TALE","TALK","TALL","TANK","TASK","TATE",
                        "TAUT","TEAL","TEAM","TEAR","TECH","TEEM","TEEN","TEET",
                        "TELL","TEND","TENT","TERM","TERN","TESS","TEST","THAN",
                        "THAT","THEE","THEM","THEN","THEY","THIN","THIS","THUD",
                        "THUG","TICK","TIDE","TIDY","TIED","TIER","TILE","TILL",
                        "TILT","TIME","TINA","TINE","TINT","TINY","TIRE","TOAD",
                        "TOGO","TOIL","TOLD","TOLL","TONE","TONG","TONY","TOOK",
                        "TOOL","TOOT","TORE","TORN","TOTE","TOUR","TOUT","TOWN",
                        "TRAG","TRAM","TRAY","TREE","TREK","TRIG","TRIM","TRIO",
                        "TROD","TROT","TROY","TRUE","TUBA","TUBE","TUCK","TUFT",
                        "TUNA","TUNE","TUNG","TURF","TURN","TUSK","TWIG","TWIN",
                        "TWIT","ULAN","UNIT","URGE","USED","USER","USES","UTAH",
                        "VAIL","VAIN","VALE","VARY","VASE","VAST","VEAL","VEDA",
                        "VEIL","VEIN","VEND","VENT","VERB","VERY","VETO","VICE",
                        "VIEW","VINE","VISE","VOID","VOLT","VOTE","WACK","WADE",
                        "WAGE","WAIL","WAIT","WAKE","WALE","WALK","WALL","WALT",
                        "WAND","WANE","WANG","WANT","WARD","WARM","WARN","WART",
                        "WASH","WAST","WATS","WATT","WAVE","WAVY","WAYS","WEAK",
                        "WEAL","WEAN","WEAR","WEED","WEEK","WEIR","WELD","WELL",
                        "WELT","WENT","WERE","WERT","WEST","WHAM","WHAT","WHEE",
                        "WHEN","WHET","WHOA","WHOM","WICK","WIFE","WILD","WILL",
                        "WIND","WINE","WING","WINK","WINO","WIRE","WISE","WISH",
                        "WITH","WOLF","WONT","WOOD","WOOL","WORD","WORE","WORK",
                        "WORM","WORN","WOVE","WRIT","WYNN","YALE","YANG","YANK",
                        "YARD","YARN","YAWL","YAWN","YEAH","YEAR","YELL","YOGA",
                        "YOKE" };
    Random random = new Random();
    int r = random.nextInt(256);
    int v = random.nextInt(256);
    return words[r] + " " + words[v];
  }
}