// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License.  You may obtain a copy
// of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
// License for the specific language governing permissions and limitations under
// the License.

couchTests.uuids = function(debug) {
  var testHashBustingHeaders = function(xhr) {
    T(xhr.getResponseHeader("Cache-Control").match(/no-cache/));
    T(xhr.getResponseHeader("Pragma") == "no-cache");

    var currentTime = new Date();
    var expiresHeader = Date.parse(xhr.getResponseHeader("Expires"));
    var dateHeader = Date.parse(xhr.getResponseHeader("Date"));

    T(expiresHeader < currentTime);
    T(currentTime - dateHeader < 3000);
  };

  var db = new CouchDB("test_suite_db");
  db.deleteDb();
  db.createDb();
  if (debug) debugger;

  // a single UUID without an explicit count
  var xhr = CouchDB.request("GET", "/_uuids");
  T(xhr.status == 200);
  var result = JSON.parse(xhr.responseText);
  T(result.uuids.length == 1);
  var first = result.uuids[0];
  testHashBustingHeaders(xhr);

  // a single UUID with an explicit count
  xhr = CouchDB.request("GET", "/_uuids?count=1");
  T(xhr.status == 200);
  result = JSON.parse(xhr.responseText);
  T(result.uuids.length == 1);
  var second = result.uuids[0];
  T(first != second);

  // no collisions with 1,000 UUIDs
  xhr = CouchDB.request("GET", "/_uuids?count=1000");
  T(xhr.status == 200);
  result = JSON.parse(xhr.responseText);
  T( result.uuids.length == 1000 );
  var seen = {};
  for(var i in result.uuids) {
    var id = result.uuids[i];
    T(seen[id] === undefined);
    seen[id] = 1;
  }

  // ensure we return a 405 on POST
  xhr = CouchDB.request("POST", "/_uuids?count=1000");
  T(xhr.status == 405);
};