const Cc = Components.classes;
const Ci = Components.interfaces;
const Cu = Components.utils;
const Cr = Components.results;

Cu.import("resource://testing-common/httpd.js");

var httpServer = null;
// Need to randomize, because apparently no one clears our cache
var randomPath = "/redirect/" + Math.random();
var randomURI = "http://localhost:4444" + randomPath;

var cacheUpdateObserver = null;

function make_channel(url, callback, ctx) {
  var ios = Cc["@mozilla.org/network/io-service;1"].
            getService(Ci.nsIIOService);
  return ios.newChannel(url, "", null);
}

function make_uri(url) {
  var ios = Cc["@mozilla.org/network/io-service;1"].
            getService(Ci.nsIIOService);
  return ios.newURI(url, null, null);
}

var responseBody = "Content body";

// start the test with loading this master entry referencing the manifest
function masterEntryHandler(metadata, response)
{
  var masterEntryContent = "<html manifest='/manifest'></html>";
  response.setHeader("Content-Type", "text/html");
  response.bodyOutputStream.write(masterEntryContent, masterEntryContent.length);
}

// manifest defines fallback namespace from any /redirect path to /content
function manifestHandler(metadata, response)
{
  var manifestContent = "CACHE MANIFEST\nFALLBACK:\nredirect /content\n";
  response.setHeader("Content-Type", "text/cache-manifest");
  response.bodyOutputStream.write(manifestContent, manifestContent.length);
}

// content handler correctly returns some plain text data
function contentHandler(metadata, response)
{
  response.setHeader("Content-Type", "text/plain");
  response.bodyOutputStream.write(responseBody, responseBody.length);
}

// redirect handler returns redirect
function redirectHandler(metadata, response)
{
  response.setStatusLine(metadata.httpVersion, 301, "Moved");
  response.setHeader("Location", "http://example.com/", false);
}

// finally check we got fallback content
function finish_test(request, buffer)
{
  do_check_eq(buffer, responseBody);
  httpServer.stop(do_test_finished);
}

function run_test()
{
  httpServer = new HttpServer();
  httpServer.registerPathHandler("/masterEntry", masterEntryHandler);
  httpServer.registerPathHandler("/manifest", manifestHandler);
  httpServer.registerPathHandler("/content", contentHandler);
  httpServer.registerPathHandler(randomPath, redirectHandler);
  httpServer.start(4444);

  var pm = Cc["@mozilla.org/permissionmanager;1"]
    .getService(Ci.nsIPermissionManager);
  var uri = make_uri("http://localhost:4444");
  var principal = Cc["@mozilla.org/scriptsecuritymanager;1"]
                    .getService(Ci.nsIScriptSecurityManager)
                    .getNoAppCodebasePrincipal(uri);

  if (pm.testPermissionFromPrincipal(principal, "offline-app") != 0) {
    dump("Previous test failed to clear offline-app permission!  Expect failures.\n");
  }
  pm.addFromPrincipal(principal, "offline-app", Ci.nsIPermissionManager.ALLOW_ACTION);

  var ps = Cc["@mozilla.org/preferences-service;1"]
    .getService(Ci.nsIPrefBranch);
  dump(ps.getBoolPref("browser.cache.offline.enable"));
  ps.setBoolPref("browser.cache.offline.enable", true);
  ps.setComplexValue("browser.cache.offline.parent_directory", Ci.nsILocalFile, do_get_profile());

  cacheUpdateObserver = {observe: function() {
    dump("got offline-cache-update-completed\n");
    // offline cache update completed.
    var chan = make_channel(randomURI);
    var chanac = chan.QueryInterface(Ci.nsIApplicationCacheChannel);
    chanac.chooseApplicationCache = true;
    chan.asyncOpen(new ChannelListener(finish_test), null);
  }}

  var os = Cc["@mozilla.org/observer-service;1"].
           getService(Ci.nsIObserverService);
  os.addObserver(cacheUpdateObserver, "offline-cache-update-completed", false);

  var us = Cc["@mozilla.org/offlinecacheupdate-service;1"].
           getService(Ci.nsIOfflineCacheUpdateService);
  us.scheduleUpdate(make_uri("http://localhost:4444/manifest"),
                    make_uri("http://localhost:4444/masterEntry"),
                    null);

  do_test_pending();
}
