Cu.import("resource://services-sync/service.js");
Cu.import("resource://services-sync/util.js");

function do_check_throws(func) {
  var raised = false;
  try {
    func();
  } catch (ex) {
    raised = true;
  }
  do_check_true(raised);
}

function send(statusCode, status, body) {
  return function(request, response) {
    response.setStatusLine(request.httpVersion, statusCode, status);
    response.bodyOutputStream.write(body, body.length);
  };
}

function test_findCluster() {
  _("Test Service._findCluster()");
  let server;
  try {
    Service.serverURL = "http://localhost:8080/";
    Service.username = "johndoe";

    _("_findCluster() throws on network errors (e.g. connection refused).");
    do_check_throws(function() {
      Service._findCluster();
    });

    server = httpd_setup({
      "/user/1.0/johndoe/node/weave": send(200, "OK", "http://weave.user.node/"),
      "/user/1.0/jimdoe/node/weave": send(200, "OK", "null"),
      "/user/1.0/janedoe/node/weave": send(404, "Not Found", "Not Found"),
      "/user/1.0/juliadoe/node/weave": send(400, "Bad Request", "Bad Request"),
      "/user/1.0/joedoe/node/weave": send(500, "Server Error", "Server Error")
    });

    _("_findCluster() returns the user's cluster node");
    let cluster = Service._findCluster();
    do_check_eq(cluster, "http://weave.user.node/");

    _("A 'null' response is converted to null.");
    Service.username = "jimdoe";
    cluster = Service._findCluster();
    do_check_eq(cluster, null);

    _("If a 404 is encountered, the server URL is taken as the cluster URL");
    Service.username = "janedoe";
    cluster = Service._findCluster();
    do_check_eq(cluster, Service.serverURL);

    _("A 400 response will throw an error.");
    Service.username = "juliadoe";
    do_check_throws(function() {
      Service._findCluster();
    });

    _("Any other server response (e.g. 500) will throw an error.");
    Service.username = "joedoe";
    do_check_throws(function() {
      Service._findCluster();
    });

  } finally {
    Svc.Prefs.resetBranch("");
    if (server) {
      server.stop(runNextTest);
    }
  }
}


function test_setCluster() {
  _("Test Service._setCluster()");
  let server = httpd_setup({
    "/user/1.0/johndoe/node/weave": send(200, "OK", "http://weave.user.node/"),
    "/user/1.0/jimdoe/node/weave": send(200, "OK", "null")
  });
  try {
    Service.serverURL = "http://localhost:8080/";
    Service.username = "johndoe";

    _("Check initial state.");
    do_check_eq(Service.clusterURL, "");

    _("Set the cluster URL.");
    do_check_true(Service._setCluster());
    do_check_eq(Service.clusterURL, "http://weave.user.node/");

    _("Setting it again won't make a difference if it's the same one.");
    do_check_false(Service._setCluster());
    do_check_eq(Service.clusterURL, "http://weave.user.node/");

    _("A 'null' response won't make a difference either.");
    Service.username = "jimdoe";
    do_check_false(Service._setCluster());
    do_check_eq(Service.clusterURL, "http://weave.user.node/");      

  } finally {
    Svc.Prefs.resetBranch("");
    server.stop(runNextTest);
  }
}

function test_updateCluster() {
  _("Test Service._updateCluster()");
  let server = httpd_setup({
    "/user/1.0/johndoe/node/weave": send(200, "OK", "http://weave.user.node/"),
    "/user/1.0/janedoe/node/weave": send(200, "OK", "http://weave.cluster.url/")
  });
  try {
    Service.serverURL = "http://localhost:8080/";
    Service.username = "johndoe";

    _("Check initial state.");
    do_check_eq(Service.clusterURL, "");
    do_check_eq(Svc.Prefs.get("lastClusterUpdate"), null);

    _("Set the cluster URL.");
    let before = Date.now();
    do_check_true(Service._updateCluster());
    do_check_eq(Service.clusterURL, "http://weave.user.node/");
    let lastUpdate = parseFloat(Svc.Prefs.get("lastClusterUpdate"));
    do_check_true(lastUpdate >= before);

    _("Trying to update the cluster URL within the backoff timeout won't do anything.");
    do_check_false(Service._updateCluster());
    do_check_eq(Service.clusterURL, "http://weave.user.node/");
    do_check_eq(parseFloat(Svc.Prefs.get("lastClusterUpdate")), lastUpdate);

    _("Time travel 30 mins into the past and the update will work.");
    Service.username = "janedoe";
    Svc.Prefs.set("lastClusterUpdate", (lastUpdate - 30*60*1000).toString());

    before = Date.now();
    do_check_true(Service._updateCluster());
    do_check_eq(Service.clusterURL, "http://weave.cluster.url/");
    lastUpdate = parseFloat(Svc.Prefs.get("lastClusterUpdate"));
    do_check_true(lastUpdate >= before);
  
  } finally {
    Svc.Prefs.resetBranch("");
    server.stop(runNextTest);
  }
}

let tests = [test_findCluster, test_setCluster, test_updateCluster];

function run_test() {
  do_test_pending();
  runNextTest();
}

function runNextTest() {
  if (tests.length)
    tests.pop()();
  else
    do_test_finished();
}