package baf.guide;
import baf.util.*;
import java.util.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class Game extends Item {
  public static SortedList all = new SortedList();
  public static long globalLastModified = 0;
  public static long lastObsolete = 0;

  boolean obsolete = false;

  public Game(String path) throws IOException {
    super(path);
    name = attributes.getProperty(":t");
    if (name == null) throw new IllegalArgumentException();
    sortString = name.toLowerCase();
    // Chop introductory words like "the" from the sortString
    StringTokenizer st = new StringTokenizer(sortString);
    String prefix = st.nextToken();
    for (int i=ignorables.length-1; i>=0; i--)
      if (prefix.equals(ignorables[i])) {
	sortString = st.nextToken("").trim();
	break;
      }
  }

  /** Prefixes that can be ignored when sorting.
   */
  private static final String ignorables[] =
    { "a", "the", "la", "die", "der"};

  public long getLastModified() {
    return new File(filename).lastModified();
  }

  /** Synchronizes the cache with the filesystem.
   */
  public static synchronized void update() throws IOException {
    File gamedir = new File(basedir + "/games");
    String games[] = gamedir.list();
    long max = globalLastModified;
    for (int i=0; i<games.length; i++) {
      String fname = games[i];
      long lm = new File(gamedir, fname).lastModified();
      // Construct new game objects as we find them
      if (lm > globalLastModified) {
	String path = "/games/"+fname;
	Game newg = new Game(path);
	Game oldg = (Game)byPath.put(path, newg);
	if (oldg != null) {
	  oldg.obsolete = true;
	  all.remove(oldg);
	  if (lm > lastObsolete) lastObsolete = lm;
	}
	all.add(newg);
      }
      if (lm > max) max = lm;
    }
    globalLastModified = max;
  }

  public static final Game[] search(String tag, String value)
    throws IOException {
    return Index.forTag(tag).search(value);
  }

  public void header(ServletOutputStream out) throws IOException {
    header(out, name, getDescription(), null, null);
  }

  public void body(ServletOutputStream out) throws IOException {
    out.print("<cite>");
    out.print(name);
    out.print("</cite><br>\n");

    // List the authors
    String authors = attributes.getProperty(":a");
    if (authors == null) out.print("Anonymous");
    else {
      StringTokenizer st = new StringTokenizer(authors, "/");
      Author a[] = new Author[st.countTokens()];
      for (int i=0; i<a.length; i++)
	a[i] = Author.forName(st.nextToken());
      switch (a.length) {
      case 1:
	a[0].hotlink(out);
	break;
      case 2:
	// Pairs of relatives are common.  Print them differently.
	if (a[0].surname.equals(a[1].surname))
	  a[0].hotlink(out, a[0].forename);
	else a[0].hotlink(out);
	out.print(" and ");
	a[1].hotlink(out);
	break;
      default:
	for (int i=0; i<a.length-1; i++) {
	  a[i].hotlink(out);
	  out.print(", ");	  
	}
	out.print("and ");
	a[a.length-1].hotlink(out);
      }
    }

    String year = attributes.getProperty(":y");
    if (year != null) {
      out.print(", ");
      Year.forName(year).hotlink(out);
    }

    String devsys = attributes.getProperty(":d");
    if (devsys != null) {
      out.print(", ");
      StringTokenizer st = new StringTokenizer(devsys, "/");
      while (st.hasMoreElements()) {
	Devsys.forName(st.nextToken()).hotlink(out);
	if (st.hasMoreElements()) out.print("/");
      }
    }

    out.print("<br>\n");
    String rating = attributes.getProperty(":r");
    if (rating == null) out.print("Not rated");
    else out.print(rating);
    out.print("<br>\n");

    String shareware = attributes.getProperty(":s");
    if (shareware != null) {
      out.print(shareware);
      out.print("<br>\n");
    }

    super.body(out);

    out.print("<br>\n");
  }

  public String getTag() {
    return ":t";
  }

  public String getDescription() {
    return "Review of "+name;
  }

  public void page(ServletOutputStream out) throws IOException {
    header(out);
    body(out);
    footer(out);
  }

  public static void indexPage(ServletOutputStream out) throws IOException {
    update();
    header(out, "All games", "Index of all text adventures reviewed");
    out.print("<h2>Index of All Games</h2>\n<ul>");
    for (Enumeration e = all.elements(); e.hasMoreElements(); ) {
      Game g = (Game)e.nextElement();
      out.print("\n<li>");
      hotlink(out, g.rawname, g.getListingString());
    }
    out.print("</ul>\n");
    footer(out);
  }

  public static void reviewsPage(ServletOutputStream out) throws IOException {
    update();
    header(out, "All reviews", "Reviews of text adventures");
    out.print("<h2>All Reviews</h2>\n");
    for (Enumeration e = all.elements(); e.hasMoreElements(); ) {
      out.print("<hr>\n");
      Game g = (Game)e.nextElement();
      g.body(out);
    }
    footer(out);
  }
}