function ok(a, msg) {
  postMessage({type: 'status', status: !!a, msg: a + ": " + msg });
}

function is(a, b, msg) {
  postMessage({type: 'status', status: a === b, msg: a + " === " + b + ": " + msg });
}

function testDefaultCtor() {
  var req = new Request("");
  is(req.method, "GET", "Default Request method is GET");
  ok(req.headers instanceof Headers, "Request should have non-null Headers object");
  is(req.url, self.location.href, "URL should be resolved with entry settings object's API base URL");
  is(req.context, "fetch", "Default context is fetch.");
  is(req.referrer, "about:client", "Default referrer is `client` which serializes to about:client.");
  is(req.mode, "cors", "Request mode for string input is cors");
  is(req.credentials, "omit", "Default Request credentials is omit");

  var req = new Request(req);
  is(req.method, "GET", "Default Request method is GET");
  ok(req.headers instanceof Headers, "Request should have non-null Headers object");
  is(req.url, self.location.href, "URL should be resolved with entry settings object's API base URL");
  is(req.context, "fetch", "Default context is fetch.");
  is(req.referrer, "about:client", "Default referrer is `client` which serializes to about:client.");
  is(req.mode, "cors", "Request mode string input is cors");
  is(req.credentials, "omit", "Default Request credentials is omit");
}

function testClone() {
  var orig = new Request("./cloned_request.txt", {
              method: 'POST',
              headers: { "Content-Length": 5 },
              body: "Sample body",
              mode: "same-origin",
              credentials: "same-origin",
            });
  var clone = orig.clone();
  ok(clone.method === "POST", "Request method is POST");
  ok(clone.headers instanceof Headers, "Request should have non-null Headers object");

  is(clone.headers.get('content-length'), "5", "Response content-length should be 5.");
  orig.headers.set('content-length', 6);
  is(clone.headers.get('content-length'), "5", "Request content-length should be 5.");

  ok(clone.url === (new URL("./cloned_request.txt", self.location.href)).href,
       "URL should be resolved with entry settings object's API base URL");
  ok(clone.referrer === "about:client", "Default referrer is `client` which serializes to about:client.");
  ok(clone.mode === "same-origin", "Request mode is same-origin");
  ok(clone.credentials === "same-origin", "Default credentials is same-origin");

  ok(!orig.bodyUsed, "Original body is not consumed.");
  ok(!clone.bodyUsed, "Clone body is not consumed.");

  var origBody = null;
  var clone2 = null;
  return orig.text().then(function (body) {
    origBody = body;
    is(origBody, "Sample body", "Original body string matches");
    ok(orig.bodyUsed, "Original body is consumed.");
    ok(!clone.bodyUsed, "Clone body is not consumed.");

    try {
      orig.clone()
      ok(false, "Cannot clone Request whose body is already consumed");
    } catch (e) {
      is(e.name, "TypeError", "clone() of consumed body should throw TypeError");
    }

    clone2 = clone.clone();
    return clone.text();
  }).then(function (body) {
    is(body, origBody, "Clone body matches original body.");
    ok(clone.bodyUsed, "Clone body is consumed.");

    try {
      clone.clone()
      ok(false, "Cannot clone Request whose body is already consumed");
    } catch (e) {
      is(e.name, "TypeError", "clone() of consumed body should throw TypeError");
    }

    return clone2.text();
  }).then(function (body) {
    is(body, origBody, "Clone body matches original body.");
    ok(clone2.bodyUsed, "Clone body is consumed.");

    try {
      clone2.clone()
      ok(false, "Cannot clone Request whose body is already consumed");
    } catch (e) {
      is(e.name, "TypeError", "clone() of consumed body should throw TypeError");
    }
  });
}

function testUsedRequest() {
  // Passing a used request should fail.
  var req = new Request("", { method: 'post', body: "This is foo" });
  var p1 = req.text().then(function(v) {
    try {
      var req2 = new Request(req);
      ok(false, "Used Request cannot be passed to new Request");
    } catch(e) {
      ok(true, "Used Request cannot be passed to new Request");
    }
  });

  // Passing a request should set the request as used.
  var reqA = new Request("", { method: 'post', body: "This is foo" });
  var reqB = new Request(reqA);
  is(reqA.bodyUsed, true, "Passing a Request to another Request should set the former as used");
  return p1;
}

function testSimpleUrlParse() {
  // Just checks that the URL parser is actually being used.
  var req = new Request("/file.html");
  is(req.url, (new URL("/file.html", self.location.href)).href, "URL parser should be used to resolve Request URL");
}

// Bug 1109574 - Passing a Request with null body should keep bodyUsed unset.
function testBug1109574() {
  var r1 = new Request("");
  is(r1.bodyUsed, false, "Initial value of bodyUsed should be false");
  var r2 = new Request(r1);
  is(r1.bodyUsed, false, "Request with null body should not have bodyUsed set");
  // This should succeed.
  var r3 = new Request(r1);
}

function testMethod() {
  // These get normalized.
  var allowed = ["delete", "get", "head", "options", "post", "put" ];
  for (var i = 0; i < allowed.length; ++i) {
    try {
      var r = new Request("", { method: allowed[i] });
      ok(true, "Method " + allowed[i] + " should be allowed");
      is(r.method, allowed[i].toUpperCase(),
         "Standard HTTP method " + allowed[i] + " should be normalized");
    } catch(e) {
      ok(false, "Method " + allowed[i] + " should be allowed");
    }
  }

  var allowed = [ "pAtCh", "foo" ];
  for (var i = 0; i < allowed.length; ++i) {
    try {
      var r = new Request("", { method: allowed[i] });
      ok(true, "Method " + allowed[i] + " should be allowed");
      is(r.method, allowed[i],
         "Non-standard but valid HTTP method " + allowed[i] +
         " should not be normalized");
    } catch(e) {
      ok(false, "Method " + allowed[i] + " should be allowed");
    }
  }

  var forbidden = ["connect", "trace", "track", "<invalid token??"];
  for (var i = 0; i < forbidden.length; ++i) {
    try {
      var r = new Request("", { method: forbidden[i] });
      ok(false, "Method " + forbidden[i] + " should be forbidden");
    } catch(e) {
      ok(true, "Method " + forbidden[i] + " should be forbidden");
    }
  }

  var allowedNoCors = ["get", "head", "post"];
  for (var i = 0; i < allowedNoCors.length; ++i) {
    try {
      var r = new Request("", { method: allowedNoCors[i], mode: "no-cors" });
      ok(true, "Method " + allowedNoCors[i] + " should be allowed in no-cors mode");
    } catch(e) {
      ok(false, "Method " + allowedNoCors[i] + " should be allowed in no-cors mode");
    }
  }

  var forbiddenNoCors = ["aardvark", "delete", "options", "put"];
  for (var i = 0; i < forbiddenNoCors.length; ++i) {
    try {
      var r = new Request("", { method: forbiddenNoCors[i], mode: "no-cors" });
      ok(false, "Method " + forbiddenNoCors[i] + " should be forbidden in no-cors mode");
    } catch(e) {
      ok(true, "Method " + forbiddenNoCors[i] + " should be forbidden in no-cors mode");
    }
  }

  // HEAD/GET requests cannot have a body.
  try {
    var r = new Request("", { method: "get", body: "hello" });
    ok(false, "HEAD/GET request cannot have a body");
  } catch(e) {
    is(e.name, "TypeError", "HEAD/GET request cannot have a body");
  }

  try {
    var r = new Request("", { method: "head", body: "hello" });
    ok(false, "HEAD/GET request cannot have a body");
  } catch(e) {
    is(e.name, "TypeError", "HEAD/GET request cannot have a body");
  }

  // Non HEAD/GET should not throw.
  var r = new Request("", { method: "patch", body: "hello" });
}

function testUrlFragment() {
  var req = new Request("./request#withfragment");
  ok(req.url, (new URL("./request", self.location.href)).href, "request.url should be serialized with exclude fragment flag set");
}

function testBodyUsed() {
  var req = new Request("./bodyused", { method: 'post', body: "Sample body" });
  is(req.bodyUsed, false, "bodyUsed is initially false.");
  return req.text().then((v) => {
    is(v, "Sample body", "Body should match");
    is(req.bodyUsed, true, "After reading body, bodyUsed should be true.");
  }).then((v) => {
    return req.blob().then((v) => {
      ok(false, "Attempting to read body again should fail.");
    }, (e) => {
      ok(true, "Attempting to read body again should fail.");
    })
  });
}

function testBodyCreation() {
  var text = "κόσμε";
  var req1 = new Request("", { method: 'post', body: text });
  var p1 = req1.text().then(function(v) {
    ok(typeof v === "string", "Should resolve to string");
    is(text, v, "Extracted string should match");
  });

  var req2 = new Request("", { method: 'post', body: new Uint8Array([72, 101, 108, 108, 111]) });
  var p2 = req2.text().then(function(v) {
    is("Hello", v, "Extracted string should match");
  });

  var req2b = new Request("", { method: 'post', body: (new Uint8Array([72, 101, 108, 108, 111])).buffer });
  var p2b = req2b.text().then(function(v) {
    is("Hello", v, "Extracted string should match");
  });

  var reqblob = new Request("", { method: 'post', body: new Blob([text]) });
  var pblob = reqblob.text().then(function(v) {
    is(v, text, "Extracted string should match");
  });

  var params = new URLSearchParams();
  params.append("item", "Goannas");
  params.append("feature", "stickyfeet");
  params.append("quantity", "700");
  var req3 = new Request("", { method: 'post', body: params });
  var p3 = req3.text().then(function(v) {
    var extracted = new URLSearchParams(v);
    is(extracted.get("item"), "Goannas", "Param should match");
    is(extracted.get("feature"), "stickyfeet", "Param should match");
    is(extracted.get("quantity"), "700", "Param should match");
  });

  return Promise.all([p1, p2, p2b, pblob, p3]);
}

function testBodyExtraction() {
  var text = "κόσμε";
  var newReq = function() { return new Request("", { method: 'post', body: text }); }
  return newReq().text().then(function(v) {
    ok(typeof v === "string", "Should resolve to string");
    is(text, v, "Extracted string should match");
  }).then(function() {
    return newReq().blob().then(function(v) {
      ok(v instanceof Blob, "Should resolve to Blob");
      var fs = new FileReaderSync();
      is(fs.readAsText(v), text, "Decoded Blob should match original");
    });
  }).then(function() {
    return newReq().json().then(function(v) {
      ok(false, "Invalid json should reject");
    }, function(e) {
      ok(true, "Invalid json should reject");
    })
  }).then(function() {
    return newReq().arrayBuffer().then(function(v) {
      ok(v instanceof ArrayBuffer, "Should resolve to ArrayBuffer");
      var dec = new TextDecoder();
      is(dec.decode(new Uint8Array(v)), text, "UTF-8 decoded ArrayBuffer should match original");
    });
  })
}

// mode cannot be set to "CORS-with-forced-preflight" from javascript.
function testModeCorsPreflightEnumValue() {
  try {
    var r = new Request(".", { mode: "cors-with-forced-preflight" });
    ok(false, "Creating Request with mode cors-with-forced-preflight should fail.");
  } catch(e) {
    ok(true, "Creating Request with mode cors-with-forced-preflight should fail.");
    // Also ensure that the error message matches error messages for truly
    // invalid strings.
    var invalidMode = "not-in-requestmode-enum";
    var invalidExc;
    try {
      var r = new Request(".", { mode: invalidMode });
    } catch(e) {
      invalidExc = e;
    }
    var expectedMessage = invalidExc.message.replace(invalidMode, 'cors-with-forced-preflight');
    is(e.message, expectedMessage,
       "mode cors-with-forced-preflight should throw same error as invalid RequestMode strings.");
  }
}

onmessage = function() {
  var done = function() { postMessage({ type: 'finish' }) }

  testDefaultCtor();
  testSimpleUrlParse();
  testUrlFragment();
  testMethod();
  testBug1109574();
  testModeCorsPreflightEnumValue();

  Promise.resolve()
    .then(testBodyCreation)
    .then(testBodyUsed)
    .then(testBodyExtraction)
    .then(testUsedRequest)
    .then(testClone())
    // Put more promise based tests here.
    .then(done)
    .catch(function(e) {
      ok(false, "Some Request tests failed " + e);
      done();
    })
}