/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */

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

/**
 * This is testcase do following steps to make sure bug767025 removing
 * files as expection.
 *
 * STEPS:
 *  - Schedule a offline cache update for app.manifest.
 *    - pages/foo1, pages/foo2, pages/foo3, and pages/foo4 are cached.
 *  - Activate pages/foo1
 *  - Doom pages/foo1, and pages/foo2.
 *    - pages/foo1 should keep alive while pages/foo2 was gone.
 *  - Activate pages/foo3
 *  - Evict all documents.
 *    - all documents except pages/foo1 are gone since pages/foo1 & pages/foo3
 *      are activated.
 */

ChromeUtils.import("resource://gre/modules/Services.jsm");

const kNS_OFFLINECACHEUPDATESERVICE_CONTRACTID =
  "@mozilla.org/offlinecacheupdate-service;1";
const kNS_CACHESTORAGESERVICE_CONTRACTID =
  "@mozilla.org/netwerk/cache-storage-service;1";
const kNS_APPLICATIONCACHESERVICE_CONTRACTID =
  "@mozilla.org/network/application-cache-service;1";

const kManifest = "CACHE MANIFEST\n" +
  "/pages/foo1\n" +
  "/pages/foo2\n" +
  "/pages/foo3\n" +
  "/pages/foo4\n";

const kDataFileSize = 1024;	// file size for each content page
const kHttpLocation = "http://localhost:4444/";

function manifest_handler(metadata, response) {
  info("manifest\n");
  response.setHeader("content-type", "text/cache-manifest");

  response.write(kManifest);
}

function datafile_handler(metadata, response) {
  info("datafile_handler\n");
  let data = "";

  while(data.length < kDataFileSize) {
    data = data + Math.random().toString(36).substring(2, 15);
  }

  response.setHeader("content-type", "text/plain");
  response.write(data.substring(0, kDataFileSize));
}

function app_handler(metadata, response) {
  info("app_handler\n");
  response.setHeader("content-type", "text/html");

  response.write("<html></html>");
}

var httpServer;

function init_profile() {
  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.nsIFile, do_get_profile());
  info("profile " + do_get_profile());
}

function init_http_server() {
  httpServer = new HttpServer();
  httpServer.registerPathHandler("/app.appcache", manifest_handler);
  httpServer.registerPathHandler("/app", app_handler);
  for (i = 1; i <= 4; i++) {
    httpServer.registerPathHandler("/pages/foo" + i, datafile_handler);
  }
  httpServer.start(4444);
}

function clean_app_cache() {
  let cache_service = Cc[kNS_CACHESTORAGESERVICE_CONTRACTID].
    getService(Ci.nsICacheStorageService);
  let storage = cache_service.appCacheStorage(LoadContextInfo.default, null);
  storage.asyncEvictStorage(null);
}

function do_app_cache(manifestURL, pageURL) {
  let update_service = Cc[kNS_OFFLINECACHEUPDATESERVICE_CONTRACTID].
    getService(Ci.nsIOfflineCacheUpdateService);

  Services.perms.add(manifestURL,
		     "offline-app",
                     Ci.nsIPermissionManager.ALLOW_ACTION);

  let update =
    update_service.scheduleUpdate(manifestURL,
                                  pageURL,
                                  Services.scriptSecurityManager.getSystemPrincipal(),
                                  null); /* no window */

  return update;
}

function watch_update(update, stateChangeHandler, cacheAvailHandler) {
  let observer = {
    QueryInterface: function QueryInterface(iftype) {
      return this;
    },

    updateStateChanged: stateChangeHandler,
    applicationCacheAvailable: cacheAvailHandler
  };~
  update.addObserver(observer);

  return update;
}

function start_and_watch_app_cache(manifestURL,
                                 pageURL,
                                 stateChangeHandler,
                                 cacheAvailHandler) {
  let ioService = Cc["@mozilla.org/network/io-service;1"].
    getService(Ci.nsIIOService);
  let update = do_app_cache(ioService.newURI(manifestURL),
                            ioService.newURI(pageURL));
  watch_update(update, stateChangeHandler, cacheAvailHandler);
  return update;
}

const {STATE_FINISHED: STATE_FINISHED,
       STATE_CHECKING: STATE_CHECKING,
       STATE_ERROR: STATE_ERROR } = Ci.nsIOfflineCacheUpdateObserver;

/*
 * Start caching app1 as a non-pinned app.
 */
function start_cache_nonpinned_app() {
  info("Start non-pinned App1");
  start_and_watch_app_cache(kHttpLocation + "app.appcache",
                          kHttpLocation + "app",
                          function (update, state) {
                            switch(state) {
                            case STATE_FINISHED:
			      check_bug();
                              break;

                            case STATE_ERROR:
                              do_throw("App cache state = " + state);
                              break;
                            }
                          },
                          function (appcache) {
                            info("app avail " + appcache + "\n");
                          });
}

var hold_entry_foo1 = null;

function check_bug() {
  // activate foo1
  asyncOpenCacheEntry(
    kHttpLocation + "pages/foo1",
    "appcache", Ci.nsICacheStorage.OPEN_READONLY, null,
    function(status, entry, appcache) {
      let storage = get_cache_service().appCacheStorage(LoadContextInfo.default, appcache);

      // Doom foo1 & foo2
      storage.asyncDoomURI(createURI(kHttpLocation + "pages/foo1"), "", { onCacheEntryDoomed: function() {
        storage.asyncDoomURI(createURI(kHttpLocation + "pages/foo2"), "", { onCacheEntryDoomed: function() {
          check_evict_cache(appcache);
        }});
      }});

      hold_entry_foo1 = entry;
    });
}

function check_evict_cache(appcache) {
  // Only foo2 should be removed.
  let file = do_get_profile().clone();
  file.append("OfflineCache");
  file.append("5");
  file.append("9");
  file.append("8379C6596B8CA4-0");
  Assert.equal(file.exists(), true);

  file = do_get_profile().clone();
  file.append("OfflineCache");
  file.append("C");
  file.append("2");
  file.append("5F356A168B5E3B-0");
  Assert.equal(file.exists(), false);

  // activate foo3
  asyncOpenCacheEntry(
    kHttpLocation + "pages/foo3",
    "appcache", Ci.nsICacheStorage.OPEN_READONLY, null,
    function(status, entry, appcache) {
      var hold_entry_foo3 = entry;

      // evict all documents.
      let storage = get_cache_service().appCacheStorage(LoadContextInfo.default, appcache);
      storage.asyncEvictStorage(null);

      // All documents are removed except foo1 & foo3.
      syncWithCacheIOThread(function () {
        // foo1
        let file = do_get_profile().clone();
        file.append("OfflineCache");
        file.append("5");
        file.append("9");
        file.append("8379C6596B8CA4-0");
        Assert.equal(file.exists(), true);

        file = do_get_profile().clone();
        file.append("OfflineCache");
        file.append("0");
        file.append("0");
        file.append("61FEE819921D39-0");
        Assert.equal(file.exists(), false);

        file = do_get_profile().clone();
        file.append("OfflineCache");
        file.append("3");
        file.append("9");
        file.append("0D8759F1DE5452-0");
        Assert.equal(file.exists(), false);

        file = do_get_profile().clone();
        file.append("OfflineCache");
        file.append("C");
        file.append("2");
        file.append("5F356A168B5E3B-0");
        Assert.equal(file.exists(), false);

        // foo3
        file = do_get_profile().clone();
        file.append("OfflineCache");
        file.append("D");
        file.append("C");
        file.append("1ADCCC843B5C00-0");
        Assert.equal(file.exists(), true);

        file = do_get_profile().clone();
        file.append("OfflineCache");
        file.append("F");
        file.append("0");
        file.append("FC3E6D6C1164E9-0");
        Assert.equal(file.exists(), false);

        httpServer.stop(do_test_finished);
      }, true /* force even with the new cache back end */);
    },
    appcache
  );
}

function run_test() {
  if (typeof _XPCSHELL_PROCESS == "undefined" ||
      _XPCSHELL_PROCESS != "child") {
    init_profile();
    clean_app_cache();
  }

  init_http_server();
  start_cache_nonpinned_app();
  do_test_pending();
}
