// This helper expects these globals to be defined.
/* global PARAMS, SJS, testCases */

/*
 * common functionality for iframe, anchor, and area referrer attribute tests
 */
const GET_RESULT = SJS + "ACTION=get-test-results";
const RESET_STATE = SJS + "ACTION=resetState";

SimpleTest.waitForExplicitFinish();
var advance = function () {
  tests.next();
};

/**
 * Listen for notifications from the child.
 * These are sent in case of error, or when the loads we await have completed.
 */
window.addEventListener("message", function (event) {
  if (event.data == "childLoadComplete") {
    // all loads happen, continue the test.
    advance();
  }
});

/**
 * helper to perform an XHR
 * to do checkIndividualResults and resetState
 */
function doXHR(aUrl, onSuccess, onFail) {
  // The server is at http[s]://example.com so we need cross-origin XHR.
  var xhr = new XMLHttpRequest({ mozSystem: true });
  xhr.responseType = "json";
  xhr.onload = function () {
    onSuccess(xhr);
  };
  xhr.onerror = function () {
    onFail(xhr);
  };
  xhr.open("GET", "http" + aUrl, true);
  xhr.send(null);
}

/**
 * Grabs the results via XHR and passes to checker.
 */
function checkIndividualResults(aTestname, aExpectedReferrer, aName) {
  var onload = xhr => {
    var results = xhr.response;
    info(JSON.stringify(xhr.response));
    ok(aName in results, aName + " tests have to be performed.");
    is(
      results[aName].policy,
      aExpectedReferrer,
      aTestname +
        " --- " +
        results[aName].policy +
        " (" +
        results[aName].referrer +
        ")"
    );
    advance();
  };
  var onerror = () => {
    ok(false, "Can't get results from the counter server.");
    SimpleTest.finish();
  };
  doXHR(GET_RESULT, onload, onerror);
}

function resetState() {
  doXHR(RESET_STATE, advance, function () {
    ok(false, "error in reset state");
    SimpleTest.finish();
  });
}

/**
 * testing if referrer header is sent correctly
 */
var tests = (function* () {
  yield SpecialPowers.pushPrefEnv(
    { set: [["security.mixed_content.block_active_content", false]] },
    advance
  );
  yield SpecialPowers.pushPrefEnv(
    { set: [["network.http.referer.disallowCrossSiteRelaxingDefault", false]] },
    advance
  );
  yield SpecialPowers.pushPermissions(
    [{ type: "systemXHR", allow: true, context: document }],
    advance
  );

  var iframe = document.getElementById("testframe");

  for (var j = 0; j < testCases.length; j++) {
    if (testCases[j].PREFS) {
      yield SpecialPowers.pushPrefEnv({ set: testCases[j].PREFS }, advance);
    }

    var actions = testCases[j].ACTION;
    var subTests = testCases[j].TESTS;
    for (var k = 0; k < actions.length; k++) {
      var actionString = actions[k];
      for (var i = 0; i < subTests.length; i++) {
        yield resetState();
        var searchParams = new URLSearchParams();
        searchParams.append("ACTION", actionString);
        searchParams.append("NAME", subTests[i].NAME);
        for (var l of PARAMS) {
          if (subTests[i][l]) {
            searchParams.append(l, subTests[i][l]);
          }
        }
        var schemeFrom = subTests[i].SCHEME_FROM || "http";
        yield (iframe.src = schemeFrom + SJS + searchParams.toString());
        yield checkIndividualResults(
          subTests[i].DESC,
          subTests[i].RESULT,
          subTests[i].NAME
        );
      }
    }
  }

  // complete.
  SimpleTest.finish();
})();
