var gListening = false;

function humanBytes(bytes) {
  var s = ['bytes', 'kB', 'MB', 'GB', 'TB', 'PB', '??'];
  if (bytes == 0) {
    return '0 bytes';
  }
  var e = Math.floor(Math.log(bytes) / Math.log(1024));
  return (bytes / Math.pow(1024, Math.floor(e))).toFixed(2) + ' ' + s[e];
}

var gStorageType;
var gStorageTypes = ['pictures', 'sdcard', 'videos', 'music']
var gDefaultStorage;
var gVolumeStorages;
var gListenerStorages;

function ds_getStorageType() {
  var typeElt = document.getElementById('ds.type');
  var typeIdx = typeElt.selectedIndex;
  return typeElt.options[typeIdx].value;
}

function ds_changeHandler(storageType, storageName, e) {
  var label = storageType + '/' + storageName;
  switch (e.reason) {
    case 'created':
    case 'modified':
    case 'deleted':
      log('[' + label + "] change path = '" + e.path + "' reason: " + e.reason);
      break;
    case 'available':
    case 'unavailable':
    case 'shared':
      log('[' + label + "] change storageName '" + e.path +
          "' reason: " + e.reason);
      break;
    default:
      log('[' + label + '] change: ' + e.reason);
      break;
  }
}

function ds_defaultStorageChanged(setting) {
  log(setting.settingName + " changed to '" + setting.settingValue + "'");
}

function AddListeners() {
  gListenerStorages = [];
  for (st = 0; st < gStorageTypes.length; st++) {
    var storageType = gStorageTypes[st];
    storages = navigator.getDeviceStorages(storageType);
    for (i = 0; i < storages.length; i++) {
      var storage = storages[i];
      gListenerStorages.push(storage);
      log('Adding listener for ' + storageType + '/' + storage.storageName);
      storage.addEventListener('change',
        ds_changeHandler.bind(this, storageType, storage.storageName));
    }
  }
  navigator.mozSettings.addObserver('device.storage.writable.name', ds_defaultStorageChanged);
}

function RemoveListeners() {
  for (i = 0; i < gListenerStorages.length; i++) {
    gListenerStorages[i].removeEventListener('change', ds_changeHandler);
  }
  navigator.mozSettings.removeObserver('device.storage.writable.name', ds_defaultStorageChanged);
}

function UpdateStorage() {
  var storageType = ds_getStorageType();
  if (storageType == gStorageType) {
    // Update the default storage, since the user can change it in the settings
    // app, and we want to reflect those changes. This app doesn't setup
    // listeners on the default storage, so we don't need to worry about
    // anything there.
    gDefaultStorage = navigator.getDeviceStorage(gStorageType);
    return;
  }

  if (gListening) {
    RemoveListeners();
  }

  gStorageType = storageType;
  gDefaultStorage = navigator.getDeviceStorage(gStorageType);
  gVolumeStorages = navigator.getDeviceStorages(gStorageType);

  if (gListening) {
    AddListeners();
  }
}

function processStorages(obj, storages) {
  var storage;
  var storageIndex = -1;

  obj.storageType = gStorageType;

  function processNext(obj) {
    try {
      storageIndex += 1;
      if (storageIndex >= storages.length) {
        if (obj.done) {
          obj.done();
        }
        return;
      }
      obj.storage = storages[storageIndex].storage;
      obj.label = storages[storageIndex].label;
      obj.filename = storages[storageIndex].filename;
      log('Processing ' + obj.label);
      if (storages[storageIndex].storage) {
        obj.storageName = storages[storageIndex].storageName;
      } else {
        obj.storageName = '';
      }
      req = obj.request();
      req.onsuccess = function report_onsuccess(e) {
        try {
          if (obj.onnext) {
            if (e.target.result) {
              obj.onnext(e);
              e.target.continue();
            } else {
              if (obj.onnextdone) {
                obj.onnextdone();
              }
              processNext(obj);
            }
          } else {
            if (obj.onsuccess) {
              obj.onsuccess(e);
            }
            processNext(obj);
          }
        } catch (e) {
          log('report_onsuccess: caught an error');
          log(e);
          log(e.stack);
        }
      };
      req.onerror = function report_onerror(e) {
        if (obj.onerror) {
          obj.onerror(e);
        } else {
          log('report_onerror');
          log(e.target.error.name);
        }
        processNext(obj);
      };
    } catch (e) {
      log('processNext caught an error');
      log(e);
      log(e.stack);
    }
  }

  if (obj.init) {
    obj.init();
  }
  processNext(obj);
}

function report(obj) {
  UpdateStorage();
  var storages = [];
  for (i = 0; i < gVolumeStorages.length; i++) {
    log('Testing storage [' + gVolumeStorages[i].storageName + ']');
    storages = storages.concat({storage: gVolumeStorages[i],
                                label: gVolumeStorages[i].storageName});
  }
  processStorages(obj, storages);
}

function processFile(obj, testAbsolute) {
  if (typeof testAbsolute === 'undefined') {
    testAbsolute = true;
  }
  UpdateStorage();
  var storages = [];
  // Test using a relative path on the default storage area
  log('Testing default storage with a relative path');
  storages = storages.concat({storage: gDefaultStorage,
                              label: 'default with relative path',
                              storageName: '',
                              filename: 'rel-default'});
 
  // Test using just a relative filename on the storage objects
  for (i = 0; i < gVolumeStorages.length; i++) {
    log('Testing storage [' + gVolumeStorages[i].storageName +
        '] with a relative path');
    storages = storages.concat({storage: gVolumeStorages[i],
                                label: gVolumeStorages[i].storageName +
                                       ' with relative path',
                                storageName: '',
                                filename: 'rel-' +
                                          gVolumeStorages[i].storageName});
  }
  if (testAbsolute) {
    // Test the default storage area using an absolute /volume/filename on the
    // storage object.
    for (i = 0; i < gVolumeStorages.length; i++) {
      log('Testing default storage with absolute path');
      storages =
        storages.concat({storage: gDefaultStorage,
                         label: 'default with an absolute path',
                         storageName: gVolumeStorages[i].storageName,
                         filename: 'abs-def-' +
                                   gVolumeStorages[i].storageName});
    }
    // Test using an absolute /volume/filename on the storage object
    for (i = 0; i < gVolumeStorages.length; i++) {
      log('Testing storage [' + gVolumeStorages[i].storageName +
          '] with absolute path');
      storages =
        storages.concat({storage: gVolumeStorages[i],
                         label: gVolumeStorages[i].storageName +
                                ' with an absolute path',
                         storageName: gVolumeStorages[i].storageName,
                         filename: 'abs-' +
                                   gVolumeStorages[i].storageName});
    }
  }
  processStorages(obj, storages);
}

function translateError(err) {
  switch (err) {
    case 'NoModificationAllowedError':
      return 'File Exists';
    case 'NotFoundError':
      return 'File does not exist';
    case 'TypeMismatchError':
      return 'File not enumerable/illegal type';
    case 'SecurityError':
      return 'Permission Denied';
    case 'Unknown':
      return 'Unknown';
  }
  return '*** Unknown ***';
}

function FreeSpace() {}
FreeSpace.prototype = {
  init: function freeSpace_init() {
    log("Free Space for type '" + this.storageType + "'");
  },
  request: function freeSpace_request() {
    return this.storage.freeSpace();
  },
  onsuccess: function freeSpace_onsuccess(e) {
     log('  ' + this.label + ' = ' + humanBytes(e.target.result));
  }
};

function UsedSpace() {}
UsedSpace.prototype = {
  init: function usedSpace_init() {
    log("Used Space for type '" + this.storageType + "'");
  },
  request: function usedSpace_request() {
    return this.storage.usedSpace();
  },
  onsuccess: function usedSpace_onsuccess(e) {
     log('  [' + this.label + '] = ' + humanBytes(e.target.result));
  }
};

function Available() {}
Available.prototype = {
  init: function availSpace_init() {
    log("Available status for type '" + this.storageType + "'");
  },
  request: function availSpace_request() {
    return this.storage.available();
  },
  onsuccess: function availSpace_onsuccess(e) {
     log('  [' + this.label + '] = ' + e.target.result);
  }
};

function Enumerate(dir) {
  this.dir = dir;
}
Enumerate.prototype = {
  init: function enumerate_init() {
    log("Enumerate for type '" + this.storageType + "' dir = '" +
        this.dir + "'");
  },
  request: function enumerate_request() {
    log("Enumerate for type '" + this.storageType + "' " + this.label);
    this.fileCount = 0;
    return this.storage.enumerate(this.dir);
  },
  onnext: function enumerate_next(e) {
     log('  ' + e.target.result.name + ' ' + e.target.result.type);
     this.fileCount += 1;
  },
  onnextdone: function enumerate_onnextdone() {
    if (this.fileCount == 0) {
      log('  *** No files found ***');
    }
  }
};

function EnumerateFileSizes() {}
EnumerateFileSizes.prototype = Object.create(Enumerate.prototype, {
  onnext: {
    value: function enum_fileSizes_next(e) {
      log('  ' + e.target.result.name + ' t:' + e.target.result.type +
          ' s:' + e.target.result.size);
      this.fileCount += 1;
    },
    enumerable: true,
    configurable: true,
    writable: true
  }
});

function AddFile() {}
AddFile.prototype = {
  request: function addFile_request() {
    this.name = 'test-' + this.filename + '.txt';
    if (this.storageName != '') {
      this.name = '/' + this.storageName + '/' + this.name;
    }
    var now = new Date();
    this.dateStr = now.toString();
    var blob = new Blob([this.dateStr + '\n'], {type: 'text/plain'});
    //log("Adding file '" + this.name + "' with contents '" +
    //    this.dateStr + "'");
    return this.storage.addNamed(blob, this.name);
  },
  onsuccess: function addFile_success(e) {
    //log("Added file '" + this.name + "' with contents '" +
    //    this.dateStr + "'");
    log("Added file '" + this.name + "' e.target.result = '" +
        e.target.result + "'");
  },
  onerror: function addFile_onerror(e) {
    log("Add file '" + this.name + "' failed");
    log('Reason: ' + e.target.error.name + ' (or ' +
        translateError(e.target.error.name) + ')');
  }
};

function AddUnnamedFile() {}
AddUnnamedFile.prototype = {
  fileName: [],
  request: function addUnnamedFile_request() {
    this.name = 'test-' + this.filename + '.txt';
    if (this.storageName != '') {
      this.name = '/' + this.storageName + '/' + this.name;
    }
    var now = new Date();
    this.dateStr = now.toString();
    var blob = new Blob([this.dateStr + '\n'], {type: 'text/plain'});
    log('Adding file to storage [' + this.label + ']');
    return this.storage.add(blob);
  },
  onsuccess: function addUnnamedFile_success(e) {
    log("  Added: '" + e.target.result + "'");
    this.fileName.push(e.target.result);
  },
  onerror: function addUnnamedFile_onerror(e) {
    log("  Add '" + e.target.result + "' failed");
    log('  Reason: ' + e.target.error.name + ' (or ' +
        translateError(e.target.error.name) + ')');
  },
  done: function addUnnamedFile_done() {
    if (this.fileName.length == 0) {
      return;
    }
    var filename = this.fileName.shift();
    var req = this.storage.delete(filename);
    function onsuccess(e) {
      log('Deleted ' + e.target.result);
      this.done();
    };
    req.onsuccess = onsuccess.bind(this);
    req.onerror = function(e) {
      log('Delete of ' + e.target.result + ' failed');
      log('Reason: ' + e.target.error.name + ' (or ' +
          translateError(e.target.error.name) + ')');
    };
  }
};

function DelFile() {}
DelFile.prototype = {
  request: function delFile_request() {
    this.name = 'test-' + this.filename + '.txt';
    if (this.storageName != '') {
      this.name = '/' + this.storageName + '/' + this.name;
    }
    //log("Deleting file '" + this.name);
    return this.storage.delete(this.name);
  },
  onsuccess: function delFile_success(e) {
    log("Deleted file '" + this.name + "'");
  },
  onerror: function delFile_onerror(e) {
    log("Delete file '" + this.name + "' failed");
    log('Reason: ' + e.target.error.name + ' (or ' +
        translateError(e.target.error.name) + ')');
  }
};

function enumerateAll(storages, dir, options) {
  var storageIndex = 0;
  var ds_cursor = null;

  var cursor = {
    continue: function cursor_continue() {
      ds_cursor.continue();
    }
  };

  function enumerateNextStorage() {
    ds_cursor = storages[storageIndex].enumerate(dir, options);
    ds_cursor.onsuccess = onsuccess;
    ds_cursor.onerror = onerror;
  };

  function onsuccess(e) {
    cursor.result = e.target.result;
    if (!cursor.result) {
      storageIndex++;
      if (storageIndex < storages.length) {
        enumerateNextStorage();
        return;
      }
      // If we've run out of storages, then we fall through and call
      // onsuccess with the null result.
    }
    if (cursor.onsuccess) {
      try {
        cursor.onsuccess(e);
      } catch (err) {
        console.warn('enumerateAll onsuccess threw', err);
      }
    }
  };

  function onerror(e) {
    cursor.error = e.target.error;
    if (cursor.onerror) {
      try {
        cursor.onerror(e);
      } catch (err) {
        console.warn('enumerateAll onerror threw', err);
      }
    }
  };

  enumerateNextStorage();
  return cursor;
}

function ds_test_enumerate_all() {
  log('ds_test_enumerate_all');
  UpdateStorage();
  var cursor = enumerateAll(gVolumeStorages, '');
  cursor.onsuccess = function() {
    var file = cursor.result;
    if (file) {
      log(' ' + file.name);
      cursor.continue();
    }
  };
  cursor.onerror = function() {
    log("cursor.onerror() called error = '" + cursor.error + "'");
  };
}

function ShowFile() {}
ShowFile.prototype = {
  request: function showFile_request() {
    this.name = 'test-' + this.filename + '.txt';
    if (this.storageName != '') {
      this.name = '/' + this.storageName + '/' + this.name;
    }
    //log("Showing file '" + this.name);
    return this.storage.get(this.name);
  },
  onsuccess: function showFile_success(e) {
    log('Showing contents of: ' + e.target.result.name);
    var reader = new FileReader();
    reader.readAsText(e.target.result);
    function onloadend(e) {
      log("  '" + e.target.result + "'");
    };
    reader.onloadend = onloadend.bind(this);
  },
  onerror: function showFile_onerror(e) {
    log("Show file '" + this.name + "' failed");
    log('Reason: ' + e.target.error.name + ' (or ' +
        translateError(e.target.error.name) + ')');
  }
};

function ds_showStorages(storages) {
  log('Found ' + storages.length + ' storages');
  for (var i = 0; i < storages.length; i++) {
    var storage = storages[i];
    if (storage) {
      log('storage[' + i + "].storageName = '" + storage.storageName +
          "' default = " + storage.default + ' canBeShared = ' + storage.canBeShared);
    } else {
      log('storage[' + i + '] = null');
    }
  }
}

function ds_addListener() {
  if (gListening) {
    log('Already listening');
    return;
  }
  UpdateStorage();
  AddListeners();
  log('Listener added');
  gListening = true;
}

function ds_removeListener() {
  if (!gListening) {
    log("We weren't listening");
    return;
  }
  UpdateStorage();
  RemoveListeners();
  log('Listener removed');
  gListening = false;
}

function ds_getDeviceStorage() {
  log('ds_getDeviceStorage');
  UpdateStorage();
  ds_showStorages([gDefaultStorage]);
}

function ds_getDeviceStorages() {
  log('ds_getDeviceStorages');
  UpdateStorage();
  ds_showStorages(gVolumeStorages);
}

var logElt;
function log(msg) {
  //console.log(msg);
  dump(msg + '\n');
  if (!logElt) {
    logElt = document.getElementById('log');
  }
  msgStr = '' + msg;
  msg2 = msgStr.replace(/^\s+/, function(m) {
    return m.replace(/\s/g, '&nbsp;');
  });
  logElt.innerHTML += msg2 + '<br>';
}

function ds_doit() {
  try {
    var cmdElt = document.getElementById('ds.cmd');
    var cmdIdx = cmdElt.selectedIndex;
    var cmd = cmdElt.options[cmdIdx].value;

    switch (cmd) {
      case 'getDeviceStorage':
        ds_getDeviceStorage();
        break;
      case 'getDeviceStorages':
        ds_getDeviceStorages();
        break;
      case 'free-space':
        report(new FreeSpace());
        break;
      case 'used-space':
        report(new UsedSpace());
        break;
      case 'available':
        report(new Available());
        break;
      case 'enumerate':
        report(new Enumerate());
        break;
      case 'enumerate-dcim':
        report(new Enumerate('DCIM'));
        break;
      case 'enumerate-filesizes':
        report(new EnumerateFileSizes());
        break;
      case 'enumerate-all':
        ds_test_enumerate_all();
        break;
      case 'add-unnamed-file':
        processFile(new AddUnnamedFile(), false);
        break;
      case 'add-file':
        processFile(new AddFile());
        break;
      case 'del-file':
        processFile(new DelFile());
        break;
      case 'mod-file':
        log('mod-file not implemented yet');
        break;
      case 'show-file':
        processFile(new ShowFile());
        break;
      case 'add-listener':
        ds_addListener();
        break;
      case 'remove-listener':
        ds_removeListener();
        break;
      case 'test':
        //ds_test();
        //ds_test_enumerate();
        //ds_test_enumerate_dcim();
        ds_test_enumerate_since();
        //ds_test_dotdot();
        //ds_test_watch();
        //ds_test_823965();
        log('Done');
        break;
      default:
        log("Unrecognized command: '" + cmd + "'");
    }
  } catch (e) {
    log('doit: caught an error');
    log(e);
    log(e.stack);
  }
}

function ds_clearLog() {
  logElt.innerHTML = '';
}

/**
 * Gives feedback that the app is running.
 */
window.onload = function() {
  log('Running');
  document.getElementById('doit').onclick = function() { ds_doit(); };
  document.getElementById('clear-log').onclick = function() { ds_clearLog(); };
};

function _logResult(test, passString, failString) {
    var isError = !test.result == !test.todo;
    var resultString = test.result ? passString : failString;
    var url = 'dummy-url';
    var diagnostic = test.name + (test.diag ? ' - ' + test.diag : '');
    var msg = [resultString, url, diagnostic].join(' | ');
    log(msg);
}

function ok(condition, name, diag) {
    var test = {'result': !!condition, 'name': name, 'diag': diag};
    _logResult(test, 'TEST-PASS', 'TEST-UNEXPECTED-FAIL');
}

function getRandomBuffer() {
  var size = 1024;
  var buffer = new ArrayBuffer(size);
  var view = new Uint8Array(buffer);
  for (var i = 0; i < size; i++) {
    view[i] = parseInt(Math.random() * 255);
  }
  return buffer;
}

function createRandomBlob(mime) {
  return blob = new Blob([getRandomBuffer()], {type: mime});
}

function randomFilename(l) {
  var set = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZ';
  var result = '';
  for (var i = 0; i < l; i++) {
    var r = Math.floor(set.length * Math.random());
    result += set.substring(r, r + 1);
  }
  return result;
}

function ds_test() {
  ok(navigator.getDeviceStorage, 'Should have getDeviceStorage');

  var storage;

  var throws = false;
  try {
   storage = navigator.getDeviceStorage();
  } catch (e) { throws = true; }
  ok(throws, 'getDeviceStorage takes one arg');

  storage = navigator.getDeviceStorage('');
  ok(!storage, 'empty string - Should not have this type of storage');

  storage = navigator.getDeviceStorage('kilimanjaro');
  ok(!storage, 'kilimanjaro - Should not have this type of storage');

  storage = navigator.getDeviceStorage('pictures');
  ok(storage, 'pictures - Should have getDeviceStorage');

  storage = navigator.getDeviceStorage('music');
  ok(storage, 'music - Should have getDeviceStorage');

  storage = navigator.getDeviceStorage('videos');
  ok(storage, 'videos - Should have getDeviceStorage');

  var cursor = storage.enumerate();
  ok(cursor, 'Should have a non-null cursor');
}

function ds_test_enumerate() {
  var files;

  function enumerateSuccess(e) {
    if (e.target.result == null) {
      ok(files.length == 0, "when the enumeration is done, we shouldn't " +
                            'have any files in this array');
      dump('We still have length = ' + files.length + '\n');
      //devicestorage_cleanup();
      return;
    }

    var filename = e.target.result.name;
    // Remove storageName, and prefix which will show up on FirefoxOS platforms.
    if (filename[0] == '/') {
      // We got /storgaeName/prefix/filename (which FirefoxOS does)
      // Remove the storageName and prefix
      filename = filename.substring(1); // Remove leading slash
      var slashIndex = filename.indexOf('/');
      if (slashIndex >= 0) {
        filename = filename.substring(slashIndex + 1); // Remove storageName
      }
    }
    if (filename.startsWith(prefix)) {
      filename = filename.substring(prefix.length + 1); // Remove prefix
    }
    var index = files.indexOf(filename);

    //files.remove(index);
    files.splice(index, 1);

    ok(index > -1, 'filename should be in the enumeration : ' + filename);

    // clean up
    var cleanup = storage.delete(e.target.result.name);
    cleanup.onsuccess = function(e) {};  // todo - can i remove this?

    e.target.continue();
  }

  function handleError(e) {
    ok(false, 'handleError was called : ' + e.target.error.name);
    //devicestorage_cleanup();
  }

  function addSuccess(e) {
    addedSoFar = addedSoFar + 1;
    if (addedSoFar == files.length) {

      var cursor = storage.enumerate(prefix);
      cursor.onsuccess = enumerateSuccess;
      cursor.onerror = handleError;
    }
  }

  function addError(e) {
    ok(false, 'addError was called : ' + e.target.error.name);
    //devicestorage_cleanup();
  }

  var storage = navigator.getDeviceStorage('pictures');
  ok(navigator.getDeviceStorage, 'Should have getDeviceStorage');
  var prefix = 'devicestorage/' + randomFilename(12) + '.png';

  files = ['a.PNG', 'b.pnG', 'c.png', 'd/a.png', 'd/b.png', 'd/c.png',
           'd/d.png', 'The/quick/brown/fox/jumps/over/the/lazy/dog.png'];
  var addedSoFar = 0;


  for (var i = 0; i < files.length; i++) {

   request = storage.addNamed(createRandomBlob('image/png'), prefix +
                              '/' + files[i]);

   ok(request, 'Should have a non-null request');
   request.onsuccess = addSuccess;
   request.onerror = addError;
  }
}

function ds_test_enumerate_since() {
  log('ds_test_enumerate_since');

  var storage = navigator.getDeviceStorage('sdcard');
  var cursor = storage.enumerate();
  var timestamp = null
  var do_since = true;
  cursor.onsuccess = function enumSuccess(e) {
    if (e.target.result == null) {
      if (do_since) {
        do_since = false;
        if (timestamp) {
          log('===== since.txt timestamp = ' + timestamp + ' =====');
          var cursor_since = storage.enumerate({'since' : timestamp});
          cursor_since.onsuccess = cursor.onsuccess;
          cursor_since.onerror = cursor.onerror;
        } else {
          log("since.txt file not found");
        }
      } else {
        log('===== Done =====');
      }
      return;
    }
    log(e.target.result.name + ' - ' + e.target.result.lastModifiedDate);
    if (e.target.result.name.slice(-9) == 'since.txt') {
      timestamp = e.target.result.lastModifiedDate;
    }
    e.target.continue();
  };
  cursor.onerror = function enumError(e) {
    log('enumError');
  };
}

function ds_test_enumerate_dcim() {

  log('ds_test_enumerate_dcim');

  var storage = navigator.getDeviceStorage('pictures');
  var cursor = storage.enumerate('DCIM');
  cursor.onsuccess = function enumSuccess(e) {
    if (e.target.result == null) {
      return;
    }
    log('Found: ' + e.target.result.name);
    e.target.continue();
  };
  cursor.onerror = function enumError(e) {
    log('enumError');
  };
}

function ds_test_dotdot() {
  function testingStorage() {
    return navigator.getDeviceStorage('pictures');
  }

  var tests = [
    function() {
      dump('About to call addNamed\n');
      return testingStorage().addNamed(createRandomBlob('image/png'),
                                       gFileName);
    },
    function() { return testingStorage(). delete(gFileName); },
    function() { return testingStorage().get(gFileName); },
    function() {
      dump('About to call enumerate\n');
      var r = testingStorage().enumerate('../');
      return r;
    }
  ];

  var gFileName = '../owned.png';

  function fail(e) {
    ok(false, 'addSuccess was called');
    dump(request);
    //devicestorage_cleanup();
  }

  function next(e) {

    if (e != undefined) {
      ok(true, 'addError was called');
      ok(e.target.error.name == 'SecurityError', 'Error must be SecurityError');
    }

    var f = tests.pop();

    if (f == undefined) {
      //devicestorage_cleanup();
      return;
    }

    request = f();
    request.onsuccess = fail;
    request.onerror = next;
  }

  dump('ds_test_dotdot\n');
  next();
}

function ds_test_watch() {
  var gFileName = randomFilename(20) + '.png';

  function addSuccess(e) {
    log('addSuccess');
  }

  function addError(e) {
    ok(false, 'addError was called : ' + e.target.error.name);
    //devicestorage_cleanup();
  }

  function onChange(e) {

    dump('we saw: ' + e.path + ' ' + e.reason + '\n');

    if (e.path == gFileName) {
      ok(true, 'we saw the file get created');
      storage.removeEventListener('change', onChange);
      //devicestorage_cleanup();
    }
    else {
      ok(e.path != '', "we shouldn't see an empty filename");
      // we may see other file changes during the test, and
      // that is completely ok
    }
  }

  var storage = navigator.getDeviceStorage('pictures');
  ok(storage, 'Should have storage');
  storage.addEventListener('change', onChange);

  request = storage.addNamed(createRandomBlob('image/png'), gFileName);
  ok(request, 'Should have a non-null request');

  request.onsuccess = addSuccess;
  request.onerror = addError;
}

function ds_test_823965() {
  var gFileName = 'devicestorage/hi.png';
  var gData = 'My name is Doug Turner (?!?).  My IRC nick is DougT.  ' +
              'I like Maple cookies.';
  var gDataBlob = new Blob([gData], {type: 'image/png'});

  function getSuccess(e) {
    var storage = navigator.getDeviceStorage('pictures');
    ok(navigator.getDeviceStorage, 'Should have getDeviceStorage');

    ok(e.target.result.name == gFileName, 'File name should match');
    ok(e.target.result.size > 0, 'File size be greater than zero');
    ok(e.target.result.type, 'File should have a mime type');
    ok(e.target.result.lastModifiedDate,
       'File should have a last modified date');

    var mreq = storage.enumerate();
    mreq.onsuccess = function() {
      var storage2 = navigator.getDeviceStorage('music');
      var dreq = storage2.delete(mreq.result.name);
      dreq.onerror = function() {
        ok(true, 'The bug has been fixed');
        //devicestorage_cleanup();
      };
      dreq.onsuccess = function() {
        ok(false, 'The bug has been fixed');
        //devicestorage_cleanup();
      };
    };

    mreq.onerror = getError;
  }

  function getError(e) {
    ok(false, 'getError was called : ' + e.target.error.name);
    //devicestorage_cleanup();
  }

  function addSuccess(e) {

    ok(e.target.result == gFileName, 'File name should match');

    var storage = navigator.getDeviceStorage('pictures');
    dump("About to call get on '" + gFileName + '\n');
    request = storage.get(gFileName);
    request.onsuccess = getSuccess;
    request.onerror = getError;

    ok(true, 'addSuccess was called');
  }

  function addError(e) {
    ok(false, 'addError was called : ' + e.target.error.name);
    //devicestorage_cleanup();
  }

  ok(navigator.getDeviceStorage, 'Should have getDeviceStorage');

  var storage = navigator.getDeviceStorage('pictures');
  ok(storage, 'Should have gotten a storage');

  request = storage.addNamed(gDataBlob, 'devicestorage/hi.png');
  ok(request, 'Should have a non-null request');

  request.onsuccess = addSuccess;
  request.onerror = addError;
}