/**
 * Read count bytes from stream and return as a String object
 */

/* import-globals-from head_cache.js */
/* import-globals-from head_cookies.js */

function read_stream(stream, count) {
  /* assume stream has non-ASCII data */
  var wrapper = Cc["@mozilla.org/binaryinputstream;1"].createInstance(
    Ci.nsIBinaryInputStream
  );
  wrapper.setInputStream(stream);
  /* JS methods can be called with a maximum of 65535 arguments, and input
     streams don't have to return all the data they make .available() when
     asked to .read() that number of bytes. */
  var data = [];
  while (count > 0) {
    var bytes = wrapper.readByteArray(Math.min(65535, count));
    data.push(String.fromCharCode.apply(null, bytes));
    count -= bytes.length;
    if (!bytes.length) {
      do_throw("Nothing read from input stream!");
    }
  }
  return data.join("");
}

const CL_EXPECT_FAILURE = 0x1;
const CL_EXPECT_GZIP = 0x2;
const CL_EXPECT_3S_DELAY = 0x4;
const CL_SUSPEND = 0x8;
const CL_ALLOW_UNKNOWN_CL = 0x10;
const CL_EXPECT_LATE_FAILURE = 0x20;
const CL_FROM_CACHE = 0x40; // Response must be from the cache
const CL_NOT_FROM_CACHE = 0x80; // Response must NOT be from the cache
const CL_IGNORE_CL = 0x100; // don't bother to verify the content-length
const CL_IGNORE_DELAYS = 0x200; // don't throw if channel returns after a long delay

const SUSPEND_DELAY = 3000;

/**
 * A stream listener that calls a callback function with a specified
 * context and the received data when the channel is loaded.
 *
 * Signature of the closure:
 *   void closure(in nsIRequest request, in ACString data, in JSObject context);
 *
 * This listener makes sure that various parts of the channel API are
 * implemented correctly and that the channel's status is a success code
 * (you can pass CL_EXPECT_FAILURE or CL_EXPECT_LATE_FAILURE as flags
 * to allow a failure code)
 *
 * Note that it also requires a valid content length on the channel and
 * is thus not fully generic.
 */
function ChannelListener(closure, ctx, flags) {
  this._closure = closure;
  this._closurectx = ctx;
  this._flags = flags;
  this._isFromCache = false;
  this._cacheEntryId = undefined;
}
ChannelListener.prototype = {
  _closure: null,
  _closurectx: null,
  _buffer: "",
  _got_onstartrequest: false,
  _got_onstoprequest: false,
  _contentLen: -1,
  _lastEvent: 0,

  QueryInterface: ChromeUtils.generateQI([
    "nsIStreamListener",
    "nsIRequestObserver",
  ]),

  onStartRequest(request) {
    try {
      if (this._got_onstartrequest) {
        do_throw("Got second onStartRequest event!");
      }
      this._got_onstartrequest = true;
      this._lastEvent = Date.now();

      try {
        this._isFromCache = request
          .QueryInterface(Ci.nsICacheInfoChannel)
          .isFromCache();
      } catch (e) {}

      var thrown = false;
      try {
        this._cacheEntryId = request
          .QueryInterface(Ci.nsICacheInfoChannel)
          .getCacheEntryId();
      } catch (e) {
        thrown = true;
      }
      if (this._isFromCache && thrown) {
        do_throw("Should get a CacheEntryId");
      } else if (!this._isFromCache && !thrown) {
        do_throw("Shouldn't get a CacheEntryId");
      }

      request.QueryInterface(Ci.nsIChannel);
      try {
        this._contentLen = request.contentLength;
      } catch (ex) {
        if (!(this._flags & (CL_EXPECT_FAILURE | CL_ALLOW_UNKNOWN_CL))) {
          do_throw("Could not get contentLength");
        }
      }
      if (!request.isPending()) {
        do_throw("request reports itself as not pending from onStartRequest!");
      }
      if (
        this._contentLen == -1 &&
        !(this._flags & (CL_EXPECT_FAILURE | CL_ALLOW_UNKNOWN_CL))
      ) {
        do_throw("Content length is unknown in onStartRequest!");
      }

      if (this._flags & CL_FROM_CACHE) {
        request.QueryInterface(Ci.nsICachingChannel);
        if (!request.isFromCache()) {
          do_throw("Response is not from the cache (CL_FROM_CACHE)");
        }
      }
      if (this._flags & CL_NOT_FROM_CACHE) {
        request.QueryInterface(Ci.nsICachingChannel);
        if (request.isFromCache()) {
          do_throw("Response is from the cache (CL_NOT_FROM_CACHE)");
        }
      }

      if (this._flags & CL_SUSPEND) {
        request.suspend();
        do_timeout(SUSPEND_DELAY, function () {
          request.resume();
        });
      }
    } catch (ex) {
      do_throw("Error in onStartRequest: " + ex);
    }
  },

  onDataAvailable(request, stream, offset, count) {
    try {
      let current = Date.now();

      if (!this._got_onstartrequest) {
        do_throw("onDataAvailable without onStartRequest event!");
      }
      if (this._got_onstoprequest) {
        do_throw("onDataAvailable after onStopRequest event!");
      }
      if (!request.isPending()) {
        do_throw("request reports itself as not pending from onDataAvailable!");
      }
      if (this._flags & CL_EXPECT_FAILURE) {
        do_throw("Got data despite expecting a failure");
      }

      if (
        !(this._flags & CL_IGNORE_DELAYS) &&
        current - this._lastEvent >= SUSPEND_DELAY &&
        !(this._flags & CL_EXPECT_3S_DELAY)
      ) {
        do_throw("Data received after significant unexpected delay");
      } else if (
        current - this._lastEvent < SUSPEND_DELAY &&
        this._flags & CL_EXPECT_3S_DELAY
      ) {
        do_throw("Data received sooner than expected");
      } else if (
        current - this._lastEvent >= SUSPEND_DELAY &&
        this._flags & CL_EXPECT_3S_DELAY
      ) {
        this._flags &= ~CL_EXPECT_3S_DELAY;
      } // No more delays expected

      this._buffer = this._buffer.concat(read_stream(stream, count));
      this._lastEvent = current;
    } catch (ex) {
      do_throw("Error in onDataAvailable: " + ex);
    }
  },

  onStopRequest(request, status) {
    try {
      var success = Components.isSuccessCode(status);
      if (!this._got_onstartrequest) {
        do_throw("onStopRequest without onStartRequest event!");
      }
      if (this._got_onstoprequest) {
        do_throw("Got second onStopRequest event!");
      }
      this._got_onstoprequest = true;
      if (
        this._flags & (CL_EXPECT_FAILURE | CL_EXPECT_LATE_FAILURE) &&
        success
      ) {
        do_throw(
          "Should have failed to load URL (status is " +
            status.toString(16) +
            ")"
        );
      } else if (
        !(this._flags & (CL_EXPECT_FAILURE | CL_EXPECT_LATE_FAILURE)) &&
        !success
      ) {
        do_throw("Failed to load URL: " + status.toString(16));
      }
      if (status != request.status) {
        do_throw("request.status does not match status arg to onStopRequest!");
      }
      if (request.isPending()) {
        do_throw("request reports itself as pending from onStopRequest!");
      }
      if (
        !(
          this._flags &
          (CL_EXPECT_FAILURE | CL_EXPECT_LATE_FAILURE | CL_IGNORE_CL)
        ) &&
        !(this._flags & CL_EXPECT_GZIP) &&
        this._contentLen != -1
      ) {
        Assert.equal(this._buffer.length, this._contentLen);
      }
    } catch (ex) {
      do_throw("Error in onStopRequest: " + ex);
    }
    try {
      this._closure(
        request,
        this._buffer,
        this._closurectx,
        this._isFromCache,
        this._cacheEntryId
      );
      this._closurectx = null;
    } catch (ex) {
      do_throw("Error in closure function: " + ex);
    }
  },
};

var ES_ABORT_REDIRECT = 0x01;

function ChannelEventSink(flags) {
  this._flags = flags;
}

ChannelEventSink.prototype = {
  QueryInterface: ChromeUtils.generateQI(["nsIInterfaceRequestor"]),

  getInterface(iid) {
    if (iid.equals(Ci.nsIChannelEventSink)) {
      return this;
    }
    throw Components.Exception("", Cr.NS_ERROR_NO_INTERFACE);
  },

  asyncOnChannelRedirect(oldChannel, newChannel, flags, callback) {
    if (this._flags & ES_ABORT_REDIRECT) {
      throw Components.Exception("", Cr.NS_BINDING_ABORTED);
    }

    callback.onRedirectVerifyCallback(Cr.NS_OK);
  },
};

/**
 * A helper class to construct origin attributes.
 */
function OriginAttributes(privateId) {
  this.privateBrowsingId = privateId;
}
OriginAttributes.prototype = {
  privateBrowsingId: 0,
};

function readFile(file) {
  let fstream = Cc["@mozilla.org/network/file-input-stream;1"].createInstance(
    Ci.nsIFileInputStream
  );
  fstream.init(file, -1, 0, 0);
  let data = NetUtil.readInputStreamToString(fstream, fstream.available());
  fstream.close();
  return data;
}

function addCertFromFile(certdb, filename, trustString) {
  let certFile = do_get_file(filename, false);
  let pem = readFile(certFile)
    .replace(/-----BEGIN CERTIFICATE-----/, "")
    .replace(/-----END CERTIFICATE-----/, "")
    .replace(/[\r\n]/g, "");
  certdb.addCertFromBase64(pem, trustString);
}

// Helper code to test nsISerializable
function serialize_to_escaped_string(obj) {
  let objectOutStream = Cc["@mozilla.org/binaryoutputstream;1"].createInstance(
    Ci.nsIObjectOutputStream
  );
  let pipe = Cc["@mozilla.org/pipe;1"].createInstance(Ci.nsIPipe);
  pipe.init(false, false, 0, 0xffffffff, null);
  objectOutStream.setOutputStream(pipe.outputStream);
  objectOutStream.writeCompoundObject(obj, Ci.nsISupports, true);
  objectOutStream.close();

  let objectInStream = Cc["@mozilla.org/binaryinputstream;1"].createInstance(
    Ci.nsIObjectInputStream
  );
  objectInStream.setInputStream(pipe.inputStream);
  let data = [];
  // This reads all the data from the stream until an error occurs.
  while (true) {
    try {
      let bytes = objectInStream.readByteArray(1);
      data.push(String.fromCharCode.apply(null, bytes));
    } catch (e) {
      break;
    }
  }
  return escape(data.join(""));
}

function deserialize_from_escaped_string(str) {
  let payload = unescape(str);
  let data = [];
  let i = 0;
  while (i < payload.length) {
    data.push(payload.charCodeAt(i++));
  }

  let objectOutStream = Cc["@mozilla.org/binaryoutputstream;1"].createInstance(
    Ci.nsIObjectOutputStream
  );
  let pipe = Cc["@mozilla.org/pipe;1"].createInstance(Ci.nsIPipe);
  pipe.init(false, false, 0, 0xffffffff, null);
  objectOutStream.setOutputStream(pipe.outputStream);
  objectOutStream.writeByteArray(data);
  objectOutStream.close();

  let objectInStream = Cc["@mozilla.org/binaryinputstream;1"].createInstance(
    Ci.nsIObjectInputStream
  );
  objectInStream.setInputStream(pipe.inputStream);
  return objectInStream.readObject(true);
}

async function asyncStartTLSTestServer(
  serverBinName,
  certsPath,
  addDefaultRoot = true
) {
  const { HttpServer } = ChromeUtils.importESModule(
    "resource://testing-common/httpd.sys.mjs"
  );
  let certdb = Cc["@mozilla.org/security/x509certdb;1"].getService(
    Ci.nsIX509CertDB
  );
  // The trusted CA that is typically used for "good" certificates.
  if (addDefaultRoot) {
    addCertFromFile(certdb, `${certsPath}/test-ca.pem`, "CTu,u,u");
  }

  const CALLBACK_PORT = 8444;

  let greBinDir = Services.dirsvc.get("GreBinD", Ci.nsIFile);
  Services.env.set("DYLD_LIBRARY_PATH", greBinDir.path);
  // TODO(bug 1107794): Android libraries are in /data/local/xpcb, but "GreBinD"
  // does not return this path on Android, so hard code it here.
  Services.env.set("LD_LIBRARY_PATH", greBinDir.path + ":/data/local/xpcb");
  Services.env.set("MOZ_TLS_SERVER_DEBUG_LEVEL", "3");
  Services.env.set("MOZ_TLS_SERVER_CALLBACK_PORT", CALLBACK_PORT);
  Services.env.set("MOZ_TLS_ECH_ALPN_FLAG", "1");

  let httpServer = new HttpServer();
  let serverReady = new Promise(resolve => {
    httpServer.registerPathHandler(
      "/",
      function handleServerCallback(aRequest, aResponse) {
        aResponse.setStatusLine(aRequest.httpVersion, 200, "OK");
        aResponse.setHeader("Content-Type", "text/plain");
        let responseBody = "OK!";
        aResponse.bodyOutputStream.write(responseBody, responseBody.length);
        executeSoon(function () {
          httpServer.stop(resolve);
        });
      }
    );
    httpServer.start(CALLBACK_PORT);
  });

  let serverBin = _getBinaryUtil(serverBinName);
  let process = Cc["@mozilla.org/process/util;1"].createInstance(Ci.nsIProcess);
  process.init(serverBin);
  let certDir = do_get_file(certsPath, false);
  Assert.ok(certDir.exists(), `certificate folder (${certsPath}) should exist`);
  // Using "sql:" causes the SQL DB to be used so we can run tests on Android.
  process.run(false, ["sql:" + certDir.path, Services.appinfo.processID], 2);

  registerCleanupFunction(function () {
    process.kill();
  });

  await serverReady;
}

function _getBinaryUtil(binaryUtilName) {
  let utilBin = Services.dirsvc.get("GreD", Ci.nsIFile);
  // On macOS, GreD is .../Contents/Resources, and most binary utilities
  // are located there, but certutil is in GreBinD (or .../Contents/MacOS),
  // so we have to change the path accordingly.
  if (binaryUtilName === "certutil") {
    utilBin = Services.dirsvc.get("GreBinD", Ci.nsIFile);
  }
  utilBin.append(binaryUtilName + mozinfo.bin_suffix);
  // If we're testing locally, the above works. If not, the server executable
  // is in another location.
  if (!utilBin.exists()) {
    utilBin = Services.dirsvc.get("CurWorkD", Ci.nsIFile);
    while (utilBin.path.includes("xpcshell")) {
      utilBin = utilBin.parent;
    }
    utilBin.append("bin");
    utilBin.append(binaryUtilName + mozinfo.bin_suffix);
  }
  // But maybe we're on Android, where binaries are in /data/local/xpcb.
  if (!utilBin.exists()) {
    utilBin.initWithPath("/data/local/xpcb/");
    utilBin.append(binaryUtilName);
  }
  Assert.ok(utilBin.exists(), `Binary util ${binaryUtilName} should exist`);
  return utilBin;
}

function promiseAsyncOpen(chan) {
  return new Promise(resolve => {
    chan.asyncOpen(
      new ChannelListener((req, buf, ctx, isCache, cacheId) => {
        resolve({ req, buf, ctx, isCache, cacheId });
      })
    );
  });
}

function hexStringToBytes(hex) {
  let bytes = [];
  for (let hexByteStr of hex.split(/(..)/)) {
    if (hexByteStr.length) {
      bytes.push(parseInt(hexByteStr, 16));
    }
  }
  return bytes;
}

function stringToBytes(str) {
  return Array.from(str, chr => chr.charCodeAt(0));
}

function BinaryHttpResponse(status, headerNames, headerValues, content) {
  this.status = status;
  this.headerNames = headerNames;
  this.headerValues = headerValues;
  this.content = content;
}

BinaryHttpResponse.prototype = {
  QueryInterface: ChromeUtils.generateQI(["nsIBinaryHttpResponse"]),
};

function bytesToString(bytes) {
  return String.fromCharCode.apply(null, bytes);
}

function check_http_info(request, expected_httpVersion, expected_proxy) {
  let httpVersion = "";
  try {
    httpVersion = request.QueryInterface(Ci.nsIHttpChannel).protocolVersion;
  } catch (e) {}

  request.QueryInterface(Ci.nsIProxiedChannel);
  var httpProxyConnectResponseCode = request.httpProxyConnectResponseCode;

  Assert.equal(expected_httpVersion, httpVersion);
  if (expected_proxy) {
    Assert.equal(httpProxyConnectResponseCode, 200);
  } else {
    Assert.equal(httpProxyConnectResponseCode, -1);
  }
}

function makeHTTPChannel(url, with_proxy) {
  function createPrincipal(uri) {
    var ssm = Services.scriptSecurityManager;
    try {
      return ssm.createContentPrincipal(Services.io.newURI(uri), {});
    } catch (e) {
      return null;
    }
  }

  if (with_proxy) {
    return Services.io
      .newChannelFromURIWithProxyFlags(
        Services.io.newURI(url),
        null,
        Ci.nsIProtocolProxyService.RESOLVE_ALWAYS_TUNNEL,
        null,
        createPrincipal(url),
        createPrincipal(url),
        Ci.nsILoadInfo.SEC_ALLOW_CROSS_ORIGIN_INHERITS_SEC_CONTEXT,
        Ci.nsIContentPolicy.TYPE_OTHER
      )
      .QueryInterface(Ci.nsIHttpChannel);
  }
  return NetUtil.newChannel({
    uri: url,
    loadUsingSystemPrincipal: true,
  }).QueryInterface(Ci.nsIHttpChannel);
}

// Like ChannelListener but does not throw an exception if something
// goes wrong. Callback is supposed to do all the work.
class SimpleChannelListener {
  constructor(callback) {
    this._onStopCallback = callback;
    this._buffer = "";
  }
  get QueryInterface() {
    return ChromeUtils.generateQI(["nsIStreamListener", "nsIRequestObserver"]);
  }

  onStartRequest() {}

  onDataAvailable(request, stream, offset, count) {
    this._buffer = this._buffer.concat(read_stream(stream, count));
  }

  onStopRequest(request) {
    if (this._onStopCallback) {
      this._onStopCallback(request, this._buffer);
    }
  }
}
