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!7

static new TreeMap<U, U> wiki; // title to text (stored as compressed strings)

sS processKey(S s) { ret toUpper(s); }

p-subst { time {
  restartWith1GBHeap();
  quietGC(); // don't litter console with GC messages
  veryBigConsole();
  consoleWordWrap();
  File f = unpackSimpleWikipedia();
  BufferedReader reader = utf8bufferedReader(f);
  S line;
  int lines = 0, pages = 0;
  StringBuilder pageBuf = null;
  while ((line = reader.readLine()) != null) {
    line = trim(line);
    if (eq(line, "<page>"))
      pageBuf = new StringBuilder;
    if (pageBuf != null)
      pageBuf.append(line).append("\n");
    if (eq(line, "</page>")) {
      //print("Page done. " + l(pageBuf) + " chars");
      L<S> tok = htmlTok(str(pageBuf));
      S title = join(contentsOfContainerTag(tok, "title"));
      S text = trim(htmldecode(join(contentsOfContainerTag(tok, "text"))));
      if (empty(text)) {
        // print("No text: " + title);
      } else {
        U key = new U(processKey(title));
        U old = wiki.get(key);
        S red = wikipedia_getRedirect(text);
        if (!eqic(red, title) && !eqic(text, str(old))) {
          /*if (old != null) {
            print("Double entry: " + title);
            print("  " + quote(str(old)));
            print("  " + quote(text));
          }*/
          if (old == null || wikipedia_getRedirect(str(old)) != null)
            wiki.put(key, new U(text));
        }
      }
      if ((++pages % 1000) == 0) {
        fractionDone(pages/228400.0);
        print("Pages: " + pages + " (" + title + ")");
        sleep(1);
      }
      //print(title); // XXX - too much printing hangs AWT (investigate!)
      pageBuf = null;
    }
  }
  }
  fractionDone(1);
  
  addToWindowSplitRight(consoleFrame(), jlist(allToString(keys(wiki))));
  
  // print a random entry
  answer(str(random(keys(wiki))));
  botSleep();
}

answer {
  U u = followRedirect(nicestClosestKey(wiki, new U(processKey(s))));
  if (u != null) {
    clearConsole();
    S title = toUpper(str(u));
    consoleStatus(title);
    print(title);
    print();
    print(dropContainerTags(str(wiki.get(u)))); // drop <ref>
    scrollConsoleUpIn(0.5);
    ret " ";
  }
}

static U followRedirect(U key) {
  U next;
  int count = 0;
  while ((next = toU(processKey(wikipedia_getRedirect(str(wiki.get(key)))))) != null && ++count < 10)
    key = next;
  ret key;
}