/*
 * Copyright (C) 2011 Google Inc.  All rights reserved.
 * Copyright (C) 2015-2016 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "WebSocket.h"

// #include "Blob.h"
#include "CloseEvent.h"
// #include "ContentSecurityPolicy.h"
// #include "DOMWindow.h"
// #include "Document.h"
#include "Event.h"
#include "EventListener.h"
#include "EventNames.h"
// #include "Frame.h"
// #include "FrameLoader.h"
// #include "FrameLoaderClient.h"
// #include "InspectorInstrumentation.h"
// #include "Logging.h"
#include "MessageEvent.h"
// #include "MixedContentChecker.h"
// #include "ResourceLoadObserver.h"
// #include "ScriptController.h"
#include "ScriptExecutionContext.h"
// #include "SecurityOrigin.h"
// #include "SocketProvider.h"
// #include "ThreadableWebSocketChannel.h"
// #include "WebSocketChannel.h"
// #include "WorkerGlobalScope.h"
// #include "WorkerLoaderProxy.h"
// #include "WorkerThread.h"
#include <JavaScriptCore/ArrayBuffer.h>
#include <JavaScriptCore/ArrayBufferView.h>
#include <JavaScriptCore/ScriptCallStack.h>
#include <wtf/HashSet.h>
#include <wtf/HexNumber.h>
// #include <wtf/IsoMallocInlines.h>
#include <wtf/NeverDestroyed.h>
// #include <wtf/RunLoop.h>
#include <wtf/StdLibExtras.h>
#include <wtf/text/CString.h>
#include <wtf/text/StringBuilder.h>

#include <uws/src/App.h>

// #if USE(WEB_THREAD)
// #include "WebCoreThreadRun.h"
// #endif
namespace WebCore {
using WebSocketChannel = WebSocketStream;
using ThreadableWebSocketChannel = WebSocketStream;
using WebSocketChannelClient = WebSocketStream;
WTF_MAKE_ISO_ALLOCATED_IMPL(WebSocket);

static size_t getFramingOverhead(size_t payloadSize)
{
    static const size_t hybiBaseFramingOverhead = 2; // Every frame has at least two-byte header.
    static const size_t hybiMaskingKeyLength = 4; // Every frame from client must have masking key.
    static const size_t minimumPayloadSizeWithTwoByteExtendedPayloadLength = 126;
    static const size_t minimumPayloadSizeWithEightByteExtendedPayloadLength = 0x10000;
    size_t overhead = hybiBaseFramingOverhead + hybiMaskingKeyLength;
    if (payloadSize >= minimumPayloadSizeWithEightByteExtendedPayloadLength)
        overhead += 8;
    else if (payloadSize >= minimumPayloadSizeWithTwoByteExtendedPayloadLength)
        overhead += 2;
    return overhead;
}

const size_t maxReasonSizeInBytes = 123;

static inline bool isValidProtocolCharacter(UChar character)
{
    // Hybi-10 says "(Subprotocol string must consist of) characters in the range U+0021 to U+007E not including
    // separator characters as defined in [RFC2616]."
    const UChar minimumProtocolCharacter = '!'; // U+0021.
    const UChar maximumProtocolCharacter = '~'; // U+007E.
    return character >= minimumProtocolCharacter && character <= maximumProtocolCharacter
        && character != '"' && character != '(' && character != ')' && character != ',' && character != '/'
        && !(character >= ':' && character <= '@') // U+003A - U+0040 (':', ';', '<', '=', '>', '?', '@').
        && !(character >= '[' && character <= ']') // U+005B - U+005D ('[', '\\', ']').
        && character != '{' && character != '}';
}

static bool isValidProtocolString(StringView protocol)
{
    if (protocol.isEmpty())
        return false;
    for (auto codeUnit : protocol.codeUnits()) {
        if (!isValidProtocolCharacter(codeUnit))
            return false;
    }
    return true;
}

static String encodeProtocolString(const String& protocol)
{
    StringBuilder builder;
    for (size_t i = 0; i < protocol.length(); i++) {
        if (protocol[i] < 0x20 || protocol[i] > 0x7E)
            builder.append("\\u", hex(protocol[i], 4));
        else if (protocol[i] == 0x5c)
            builder.append("\\\\");
        else
            builder.append(protocol[i]);
    }
    return builder.toString();
}

static String joinStrings(const Vector<String>& strings, const char* separator)
{
    StringBuilder builder;
    for (size_t i = 0; i < strings.size(); ++i) {
        if (i)
            builder.append(separator);
        builder.append(strings[i]);
    }
    return builder.toString();
}

static unsigned saturateAdd(unsigned a, unsigned b)
{
    if (std::numeric_limits<unsigned>::max() - a < b)
        return std::numeric_limits<unsigned>::max();
    return a + b;
}

ASCIILiteral WebSocket::subprotocolSeparator()
{
    return ", "_s;
}

WebSocket::WebSocket(ScriptExecutionContext& context)
    : ContextDestructionObserver(&context)
    , m_subprotocol(emptyString())
    , m_extensions(emptyString())
{
}

WebSocket::~WebSocket()
{

    if (m_upgradeClient != nullptr) {
        void* upgradeClient = m_upgradeClient;
        if (m_isSecure) {
            Bun_SecureWebSocketUpgradeClient__cancel(upgradeClient);
        } else {
            Bun_WebSocketUpgradeClient__cancel(upgradeClient);
        }
    }

    switch (m_connectedWebSocketKind) {
    case ConnectedWebSocketKind::Client: {
        this->m_connectedWebSocket.client->end(None);
        break;
    }
    case ConnectedWebSocketKind::ClientSSL: {
        this->m_connectedWebSocket.clientSSL->end(None);
        break;
    }
    case ConnectedWebSocketKind::Server: {
        this->m_connectedWebSocket.server->end(None);
        break;
    }
    case ConnectedWebSocketKind::ServerSSL: {
        this->m_connectedWebSocket.serverSSL->end(None);
        break;
    }
    default: {
        break;
    }
    }
}

ExceptionOr<Ref<WebSocket>> WebSocket::create(ScriptExecutionContext& context, const String& url)
{
    return create(context, url, Vector<String> {});
}

ExceptionOr<Ref<WebSocket>> WebSocket::create(ScriptExecutionContext& context, const String& url, const Vector<String>& protocols)
{
    if (url.isNull())
        return Exception { SyntaxError };

    auto socket = adoptRef(*new WebSocket(context));
    // socket->suspendIfNeeded();

    auto result = socket->connect(url, protocols);
    // auto result = socket->connect(url, protocols);

    if (result.hasException())
        return result.releaseException();

    return socket;
}

ExceptionOr<Ref<WebSocket>> WebSocket::create(ScriptExecutionContext& context, const String& url, const String& protocol)
{
    return create(context, url, Vector<String> { 1, protocol });
}

ExceptionOr<void> WebSocket::connect(const String& url)
{
    return connect(url, Vector<String> {});
}

ExceptionOr<void> WebSocket::connect(const String& url, const String& protocol)
{
    return connect(url, Vector<String> { 1, protocol });
}

void WebSocket::failAsynchronously()
{
    // queueTaskKeepingObjectAlive(*this, TaskSource::WebSocket, [this] {
    // We must block this connection. Instead of throwing an exception, we indicate this
    // using the error event. But since this code executes as part of the WebSocket's
    // constructor, we have to wait until the constructor has completed before firing the
    // event; otherwise, users can't connect to the event.
    this->dispatchErrorEventIfNeeded();
    // this->();
    // this->stop();
    // });
}

static String resourceName(const URL& url)
{
    auto path = url.path();
    auto result = makeString(
        path,
        path.isEmpty() ? "/" : "",
        url.queryWithLeadingQuestionMark());
    ASSERT(!result.isEmpty());
    ASSERT(!result.contains(' '));
    return result;
}

static String hostName(const URL& url, bool secure)
{
    ASSERT(url.protocolIs("wss") == secure);
    if (url.port() && ((!secure && url.port().value() != 80) || (secure && url.port().value() != 443)))
        return makeString(asASCIILowercase(url.host()), ':', url.port().value());
    return url.host().convertToASCIILowercase();
}

ExceptionOr<void> WebSocket::connect(const String& url, const Vector<String>& protocols)
{
    LOG(Network, "WebSocket %p connect() url='%s'", this, url.utf8().data());
    m_url = URL { url };

    ASSERT(scriptExecutionContext());
    auto& context = *scriptExecutionContext();

    if (!m_url.isValid()) {
        // context.addConsoleMessage(MessageSource::JS, MessageLevel::Error, );
        m_state = CLOSED;
        return Exception { SyntaxError, makeString("Invalid url for WebSocket "_s, m_url.stringCenterEllipsizedToLength()) };
    }

    bool is_secure = m_url.protocolIs("wss");

    if (!m_url.protocolIs("ws") && !is_secure) {
        // context.addConsoleMessage(MessageSource::JS, MessageLevel::Error, );
        m_state = CLOSED;
        return Exception { SyntaxError, makeString("Wrong url scheme for WebSocket "_s, m_url.stringCenterEllipsizedToLength()) };
    }
    if (m_url.hasFragmentIdentifier()) {
        // context.addConsoleMessage(MessageSource::JS, MessageLevel::Error, );
        m_state = CLOSED;
        return Exception { SyntaxError, makeString("URL has fragment component "_s, m_url.stringCenterEllipsizedToLength()) };
    }

    // ASSERT(context.contentSecurityPolicy());
    // auto& contentSecurityPolicy = *context.contentSecurityPolicy();

    // contentSecurityPolicy.upgradeInsecureRequestIfNeeded(m_url, ContentSecurityPolicy::InsecureRequestType::Load);

    // if (!portAllowed(m_url)) {
    //     String message;
    //     if (m_url.port())
    //         message = makeString("WebSocket port ", m_url.port().value(), " blocked");
    //     else
    //         message = "WebSocket without port blocked"_s;
    //     context.addConsoleMessage(MessageSource::JS, MessageLevel::Error, message);
    //     failAsynchronously();
    //     return {};
    // }

    // FIXME: Convert this to check the isolated world's Content Security Policy once webkit.org/b/104520 is solved.
    // if (!context.shouldBypassMainWorldContentSecurityPolicy() && !contentSecurityPolicy.allowConnectToSource(m_url)) {
    //     m_state = CLOSED;

    //     // FIXME: Should this be throwing an exception?
    //     return Exception { SecurityError };
    // }

    // FIXME: There is a disagreement about restriction of subprotocols between WebSocket API and hybi-10 protocol
    // draft. The former simply says "only characters in the range U+0021 to U+007E are allowed," while the latter
    // imposes a stricter rule: "the elements MUST be non-empty strings with characters as defined in [RFC2616],
    // and MUST all be unique strings."
    //
    // Here, we throw SyntaxError if the given protocols do not meet the latter criteria. This behavior does not
    // comply with WebSocket API specification, but it seems to be the only reasonable way to handle this conflict.
    for (auto& protocol : protocols) {
        if (!isValidProtocolString(protocol)) {
            // context.addConsoleMessage(MessageSource::JS, MessageLevel::Error, );
            m_state = CLOSED;
            return Exception { SyntaxError, makeString("Wrong protocol for WebSocket '"_s, encodeProtocolString(protocol), "'"_s) };
        }
    }
    HashSet<String> visited;
    for (auto& protocol : protocols) {
        if (!visited.add(protocol).isNewEntry) {
            // context.addConsoleMessage(MessageSource::JS, MessageLevel::Error, );
            m_state = CLOSED;
            return Exception { SyntaxError, makeString("WebSocket protocols contain duplicates:"_s, encodeProtocolString(protocol), "'"_s) };
        }
    }

    // RunLoop::main().dispatch([targetURL = m_url.isolatedCopy(), mainFrameURL = context.url().isolatedCopy()]() {
    //     ResourceLoadObserver::shared().logWebSocketLoading(targetURL, mainFrameURL);
    // });

    // if (is<Document>(context)) {
    //     Document& document = downcast<Document>(context);
    //     RefPtr<Frame> frame = document.frame();
    //     // FIXME: make the mixed content check equivalent to the non-document mixed content check currently in WorkerThreadableWebSocketChannel::Bridge::connect()
    //     if (!frame || !MixedContentChecker::canRunInsecureContent(*frame, document.securityOrigin(), m_url)) {
    //         failAsynchronously();
    //         return { };
    //     }
    // }

    String protocolString;
    if (!protocols.isEmpty())
        protocolString = joinStrings(protocols, subprotocolSeparator());

    ZigString host = Zig::toZigString(m_url.host());
    auto resource = resourceName(m_url);
    ZigString path = Zig::toZigString(resource);
    ZigString clientProtocolString = Zig::toZigString(protocolString);
    uint16_t port = is_secure ? 443 : 80;
    if (auto userPort = m_url.port()) {
        port = userPort.value();
    }

    m_isSecure = is_secure;
    if (is_secure) {
        us_socket_context_t* ctx = scriptExecutionContext()->webSocketContext<true>();
        RELEASE_ASSERT(ctx);
        this->m_upgradeClient = Bun_SecureWebSocketUpgradeClient__connect(scriptExecutionContext()->jsGlobalObject(), ctx, this, &host, port, &path, &clientProtocolString);
    } else {
        us_socket_context_t* ctx = scriptExecutionContext()->webSocketContext<false>();
        RELEASE_ASSERT(ctx);
        this->m_upgradeClient = Bun_WebSocketUpgradeClient__connect(scriptExecutionContext()->jsGlobalObject(), ctx, this, &host, port, &path, &clientProtocolString);
    }

    if (this->m_upgradeClient == nullptr) {
        // context.addConsoleMessage(MessageSource::JS, MessageLevel::Error, );
        m_state = CLOSED;
        return Exception { SyntaxError, "WebSocket connection failed"_s };
    }

    m_state = CONNECTING;

    // #if ENABLE(INTELLIGENT_TRACKING_PREVENTION)
    //     auto reportRegistrableDomain = [domain = RegistrableDomain(m_url).isolatedCopy()](auto& context) mutable {
    //         if (auto* frame = downcast<Document>(context).frame())
    //             frame->loader().client().didLoadFromRegistrableDomain(WTFMove(domain));
    //     };
    //     if (is<Document>(context))
    //         reportRegistrableDomain(context);
    //     else
    //         downcast<WorkerGlobalScope>(context).thread().workerLoaderProxy().postTaskToLoader(WTFMove(reportRegistrableDomain));
    // #endif

    // m_pendingActivity = makePendingActivity(*this);

    return {};
}

ExceptionOr<void> WebSocket::send(const String& message)
{
    LOG(Network, "WebSocket %p send() Sending String '%s'", this, message.utf8().data());
    if (m_state == CONNECTING)
        return Exception { InvalidStateError };
    auto utf8 = message.utf8(StrictConversionReplacingUnpairedSurrogatesWithFFFD);
    // No exception is raised if the connection was once established but has subsequently been closed.
    if (m_state == CLOSING || m_state == CLOSED) {
        size_t payloadSize = utf8.length();
        m_bufferedAmountAfterClose = saturateAdd(m_bufferedAmountAfterClose, payloadSize);
        m_bufferedAmountAfterClose = saturateAdd(m_bufferedAmountAfterClose, getFramingOverhead(payloadSize));
        return {};
    }

    if (utf8.length() > 0)
        this->sendWebSocketData<false>(utf8.data(), utf8.length());

    return {};
}

ExceptionOr<void> WebSocket::send(ArrayBuffer& binaryData)
{
    LOG(Network, "WebSocket %p send() Sending ArrayBuffer %p", this, &binaryData);
    if (m_state == CONNECTING)
        return Exception { InvalidStateError };
    if (m_state == CLOSING || m_state == CLOSED) {
        unsigned payloadSize = binaryData.byteLength();
        m_bufferedAmountAfterClose = saturateAdd(m_bufferedAmountAfterClose, payloadSize);
        m_bufferedAmountAfterClose = saturateAdd(m_bufferedAmountAfterClose, getFramingOverhead(payloadSize));
        return {};
    }
    char* data = static_cast<char*>(binaryData.data());
    size_t length = binaryData.byteLength();
    if (length > 0)
        this->sendWebSocketData<true>(data, length);
    return {};
}

ExceptionOr<void> WebSocket::send(ArrayBufferView& arrayBufferView)
{
    LOG(Network, "WebSocket %p send() Sending ArrayBufferView %p", this, &arrayBufferView);

    if (m_state == CONNECTING)
        return Exception { InvalidStateError };
    if (m_state == CLOSING || m_state == CLOSED) {
        unsigned payloadSize = arrayBufferView.byteLength();
        m_bufferedAmountAfterClose = saturateAdd(m_bufferedAmountAfterClose, payloadSize);
        m_bufferedAmountAfterClose = saturateAdd(m_bufferedAmountAfterClose, getFramingOverhead(payloadSize));
        return {};
    }
    ASSERT(m_channel);

    auto buffer = arrayBufferView.unsharedBuffer().get();
    char* baseAddress = reinterpret_cast<char*>(buffer->data()) + arrayBufferView.byteOffset();
    size_t length = arrayBufferView.byteLength();
    if (length > 0)
        this->sendWebSocketData<true>(baseAddress, length);

    return {};
}

// ExceptionOr<void> WebSocket::send(Blob& binaryData)
// {
//     LOG(Network, "WebSocket %p send() Sending Blob '%s'", this, binaryData.url().stringCenterEllipsizedToLength().utf8().data());
//     if (m_state == CONNECTING)
//         return Exception { InvalidStateError };
//     if (m_state == CLOSING || m_state == CLOSED) {
//         unsigned payloadSize = static_cast<unsigned>(binaryData.size());
//         m_bufferedAmountAfterClose = saturateAdd(m_bufferedAmountAfterClose, payloadSize);
//         m_bufferedAmountAfterClose = saturateAdd(m_bufferedAmountAfterClose, getFramingOverhead(payloadSize));
//         return {};
//     }
//     m_bufferedAmount = saturateAdd(m_bufferedAmount, binaryData.size());
//     ASSERT(m_channel);
//     m_channel->send(binaryData);
//     return {};
// }

template<bool isBinary>
void WebSocket::sendWebSocketData(const char* baseAddress, size_t length)
{
    uWS::OpCode opCode = uWS::OpCode::TEXT;

    if constexpr (isBinary)
        opCode = uWS::OpCode::BINARY;

    switch (m_connectedWebSocketKind) {
    case ConnectedWebSocketKind::Client: {
        this->m_connectedWebSocket.client->send({ baseAddress, length }, opCode, false);
        this->m_bufferedAmount = this->m_connectedWebSocket.client->getBufferedAmount();
        break;
    }
    case ConnectedWebSocketKind::ClientSSL: {
        this->m_connectedWebSocket.clientSSL->send({ baseAddress, length }, opCode, false);
        this->m_bufferedAmount = this->m_connectedWebSocket.clientSSL->getBufferedAmount();
        break;
    }
    case ConnectedWebSocketKind::Server: {
        this->m_connectedWebSocket.server->send({ baseAddress, length }, opCode, false);
        this->m_bufferedAmount = this->m_connectedWebSocket.server->getBufferedAmount();
        break;
    }
    case ConnectedWebSocketKind::ServerSSL: {
        this->m_connectedWebSocket.serverSSL->send({ baseAddress, length }, opCode, false);
        this->m_bufferedAmount = this->m_connectedWebSocket.serverSSL->getBufferedAmount();
        break;
    }
    default: {
        RELEASE_ASSERT_NOT_REACHED();
    }
    }
}

ExceptionOr<void> WebSocket::close(std::optional<unsigned short> optionalCode, const String& reason)
{

    CString utf8 = reason.utf8(StrictConversionReplacingUnpairedSurrogatesWithFFFD);
    int code = optionalCode ? optionalCode.value() : static_cast<int>(WebSocketChannel::CloseEventCodeNotSpecified);
    if (code == WebSocketChannel::CloseEventCodeNotSpecified)
        LOG(Network, "WebSocket %p close() without code and reason", this);
    else {
        LOG(Network, "WebSocket %p close() code=%d reason='%s'", this, code, reason.utf8().data());
        // if (!(code == WebSocketChannel::CloseEventCodeNormalClosure || (WebSocketChannel::CloseEventCodeMinimumUserDefined <= code && code <= WebSocketChannel::CloseEventCodeMaximumUserDefined)))
        //     return Exception { InvalidAccessError };
        if (utf8.length() > maxReasonSizeInBytes) {
            // scriptExecutionContext()->addConsoleMessage(MessageSource::JS, MessageLevel::Error, "WebSocket close message is too long."_s);
            return Exception { SyntaxError, "WebSocket close message is too long."_s };
        }
    }

    if (m_state == CLOSING || m_state == CLOSED)
        return {};
    if (m_state == CONNECTING) {
        m_state = CLOSING;
        if (m_upgradeClient != nullptr) {
            void* upgradeClient = m_upgradeClient;
            m_upgradeClient = nullptr;
            if (m_isSecure) {
                Bun_SecureWebSocketUpgradeClient__cancel(upgradeClient);
            } else {
                Bun_WebSocketUpgradeClient__cancel(upgradeClient);
            }
        }
        return {};
    }
    m_state = CLOSING;
    switch (m_connectedWebSocketKind) {
    case ConnectedWebSocketKind::Client: {
        this->m_connectedWebSocket.client->end(code, { utf8.data(), utf8.length() });
        this->m_bufferedAmount = this->m_connectedWebSocket.client->getBufferedAmount();
        break;
    }
    case ConnectedWebSocketKind::ClientSSL: {
        this->m_connectedWebSocket.clientSSL->end(code, { utf8.data(), utf8.length() });
        this->m_bufferedAmount = this->m_connectedWebSocket.clientSSL->getBufferedAmount();
        break;
    }
    case ConnectedWebSocketKind::Server: {
        this->m_connectedWebSocket.server->end(code, { utf8.data(), utf8.length() });
        this->m_bufferedAmount = this->m_connectedWebSocket.server->getBufferedAmount();
        break;
    }
    case ConnectedWebSocketKind::ServerSSL: {
        this->m_connectedWebSocket.serverSSL->end(code, { utf8.data(), utf8.length() });
        this->m_bufferedAmount = this->m_connectedWebSocket.serverSSL->getBufferedAmount();
        break;
    }
    default: {
        break;
    }
    }
    this->m_connectedWebSocketKind = ConnectedWebSocketKind::None;

    return {};
}

WebSocketChannelClient* WebSocket::channel() const
{
    return m_channel;
}

const URL& WebSocket::url() const
{
    return m_url;
}

WebSocket::State WebSocket::readyState() const
{
    return m_state;
}

unsigned WebSocket::bufferedAmount() const
{
    return saturateAdd(m_bufferedAmount, m_bufferedAmountAfterClose);
}

String WebSocket::protocol() const
{
    return m_subprotocol;
}

String WebSocket::extensions() const
{
    return m_extensions;
}

String WebSocket::binaryType() const
{
    switch (m_binaryType) {
    // case BinaryType::Blob:
    //     return "blob"_s;
    case BinaryType::ArrayBuffer:
        return "arraybuffer"_s;
    }
    ASSERT_NOT_REACHED();
    return String();
}

ExceptionOr<void> WebSocket::setBinaryType(const String& binaryType)
{
    // if (binaryType == "blob") {
    //     m_binaryType = BinaryType::Blob;
    //     return {};
    // }
    if (binaryType == "arraybuffer") {
        m_binaryType = BinaryType::ArrayBuffer;
        return {};
    }
    // scriptExecutionContext()->addConsoleMessage(MessageSource::JS, MessageLevel::Error, "'" + binaryType + "' is not a valid value for binaryType; binaryType remains unchanged.");
    return Exception { SyntaxError, makeString("'"_s, binaryType, "' is not a valid value for binaryType; binaryType remains unchanged."_s) };
}

EventTargetInterface WebSocket::eventTargetInterface() const
{
    return WebSocketEventTargetInterfaceType;
}

ScriptExecutionContext* WebSocket::scriptExecutionContext() const
{
    return ContextDestructionObserver::scriptExecutionContext();
}

// void WebSocket::contextDestroyed()
// {
//     LOG(Network, "WebSocket %p contextDestroyed()", this);
//     ASSERT(!m_channel);
//     ASSERT(m_state == CLOSED);
//     // ActiveDOMObject::contextDestroyed();
// }

// void WebSocket::suspend(ReasonForSuspension reason)
// {
//     // if (!m_channel)
//     //     return;

//     // if (reason == ReasonForSuspension::BackForwardCache) {
//     //     // This will cause didClose() to be called.
//     //     m_channel->fail("WebSocket is closed due to suspension."_s);
//     //     return;
//     // }

//     // m_channel->suspend();
// }

// void WebSocket::resume()
// {
//     // if (m_channel)
//     //     m_channel->resume();
// }

// void WebSocket::stop()
// {
//     if (m_channel)
//         m_channel->disconnect();
//     m_channel = nullptr;
//     m_state = CLOSED;
//     // ActiveDOMObject::stop();
//     // m_pendingActivity = nullptr;
// }

// const char* WebSocket::activeDOMObjectName() const
// {
//     return "WebSocket";
// }

void WebSocket::didConnect()
{
    LOG(Network, "WebSocket %p didConnect()", this);
    // queueTaskKeepingObjectAlive(*this, TaskSource::WebSocket, [this] {
    if (m_state == CLOSED)
        return;
    if (m_state != CONNECTING) {
        didClose(0, ClosingHandshakeIncomplete, WebSocketChannel::CloseEventCodeAbnormalClosure, emptyString());
        return;
    }
    ASSERT(scriptExecutionContext());
    m_state = OPEN;
    // m_subprotocol = m_channel->subprotocol();
    // m_extensions = m_channel->extensions();
    dispatchEvent(Event::create(eventNames().openEvent, Event::CanBubble::No, Event::IsCancelable::No));
    // });
}

void WebSocket::didReceiveMessage(String&& message)
{
    LOG(Network, "WebSocket %p didReceiveMessage() Text message '%s'", this, message.utf8().data());
    // queueTaskKeepingObjectAlive(*this, TaskSource::WebSocket, [this, message = WTFMove(message)]() mutable {
    if (m_state != OPEN)
        return;

    // if (UNLIKELY(InspectorInstrumentation::hasFrontends())) {
    //     if (auto* inspector = m_channel->channelInspector()) {
    //         auto utf8Message = message.utf8();
    //         inspector->didReceiveWebSocketFrame(WebSocketChannelInspector::createFrame(utf8Message.dataAsUInt8Ptr(), utf8Message.length(), WebSocketFrame::OpCode::OpCodeText));
    //     }
    // }
    ASSERT(scriptExecutionContext());
    dispatchEvent(MessageEvent::create(WTFMove(message), m_url.string()));
    // });
}

void WebSocket::didReceiveBinaryData(Vector<uint8_t>&& binaryData)
{
    LOG(Network, "WebSocket %p didReceiveBinaryData() %u byte binary message", this, static_cast<unsigned>(binaryData.size()));
    // queueTaskKeepingObjectAlive(*this, TaskSource::WebSocket, [this, binaryData = WTFMove(binaryData)]() mutable {
    if (m_state != OPEN)
        return;

    // if (UNLIKELY(InspectorInstrumentation::hasFrontends())) {
    //     if (auto* inspector = m_channel->channelInspector())
    //         inspector->didReceiveWebSocketFrame(WebSocketChannelInspector::createFrame(binaryData.data(), binaryData.size(), WebSocketFrame::OpCode::OpCodeBinary));
    // }

    switch (m_binaryType) {
    // case BinaryType::Blob:
    //     // FIXME: We just received the data from NetworkProcess, and are sending it back. This is inefficient.
    //     dispatchEvent(MessageEvent::create(Blob::create(scriptExecutionContext(), WTFMove(binaryData), emptyString()), SecurityOrigin::create(m_url)->toString()));
    //     break;
    case BinaryType::ArrayBuffer:
        dispatchEvent(MessageEvent::create(ArrayBuffer::create(binaryData.data(), binaryData.size()), m_url.string()));
        break;
    }
    // });
}

void WebSocket::didReceiveMessageError(WTF::StringImpl::StaticStringImpl* reason)
{
    LOG(Network, "WebSocket %p didReceiveErrorMessage()", this);
    // queueTaskKeepingObjectAlive(*this, TaskSource::WebSocket, [this, reason = WTFMove(reason)] {
    if (m_state == CLOSED)
        return;
    m_state = CLOSED;
    ASSERT(scriptExecutionContext());

    // if (UNLIKELY(InspectorInstrumentation::hasFrontends())) {
    //     if (auto* inspector = m_channel->channelInspector())
    //         inspector->didReceiveWebSocketFrameError(reason);
    // }

    // FIXME: As per https://html.spec.whatwg.org/multipage/web-sockets.html#feedback-from-the-protocol:concept-websocket-closed, we should synchronously fire a close event.
    dispatchEvent(CloseEvent::create(false, 0, WTF::String(reason)));
    // });
}

void WebSocket::didUpdateBufferedAmount(unsigned bufferedAmount)
{
    LOG(Network, "WebSocket %p didUpdateBufferedAmount() New bufferedAmount is %u", this, bufferedAmount);
    if (m_state == CLOSED)
        return;
    m_bufferedAmount = bufferedAmount;
}

void WebSocket::didStartClosingHandshake()
{
    LOG(Network, "WebSocket %p didStartClosingHandshake()", this);
    // queueTaskKeepingObjectAlive(*this, TaskSource::WebSocket, [this] {
    if (m_state == CLOSED)
        return;
    m_state = CLOSING;
    // });
}

void WebSocket::didClose(unsigned unhandledBufferedAmount, ClosingHandshakeCompletionStatus closingHandshakeCompletion, unsigned short code, const String& reason)
{
    LOG(Network, "WebSocket %p didClose()", this);
    if (this->m_connectedWebSocketKind == ConnectedWebSocketKind::None)
        return;

    // queueTaskKeepingObjectAlive(*this, TaskSource::WebSocket, [this, unhandledBufferedAmount, closingHandshakeCompletion, code, reason] {
    // if (!m_channel)
    //     return;

    // if (UNLIKELY(InspectorInstrumentation::hasFrontends())) {
    //     if (auto* inspector = m_channel->channelInspector()) {
    //         WebSocketFrame closingFrame(WebSocketFrame::OpCodeClose, true, false, false);
    //         inspector->didReceiveWebSocketFrame(closingFrame);
    //         inspector->didCloseWebSocket();
    //     }
    // }

    bool wasClean = m_state == CLOSING && !unhandledBufferedAmount && closingHandshakeCompletion == ClosingHandshakeComplete && code != WebSocketChannel::CloseEventCodeAbnormalClosure;
    m_state = CLOSED;
    m_bufferedAmount = unhandledBufferedAmount;
    ASSERT(scriptExecutionContext());

    dispatchEvent(CloseEvent::create(wasClean, code, reason));

    this->m_connectedWebSocketKind = ConnectedWebSocketKind::None;
    this->m_upgradeClient = nullptr;
    // m_pendingActivity = nullptr;
    // });
}

// void WebSocket::didUpgradeURL()
// {
//     ASSERT(m_url.protocolIs("ws"));
//     m_url.setProtocol("wss");
// }

void WebSocket::dispatchErrorEventIfNeeded()
{
    if (m_dispatchedErrorEvent)
        return;

    m_dispatchedErrorEvent = true;
    dispatchEvent(Event::create(eventNames().errorEvent, Event::CanBubble::No, Event::IsCancelable::No));
}

void WebSocket::didConnect(us_socket_t* socket, char* bufferedData, size_t bufferedDataSize)
{
    m_state = OPEN;
    this->m_upgradeClient = nullptr;
    if (m_isSecure) {
        /* Adopting a socket invalidates it, do not rely on it directly to carry any data */
        uWS::WebSocket<true, false, WebSocket*>* webSocket = (uWS::WebSocket<true, false, WebSocket*>*)us_socket_context_adopt_socket(1,
            (us_socket_context_t*)this->scriptExecutionContext()->connnectedWebSocketContext<true, false>(), socket, sizeof(uWS::WebSocketData) + sizeof(WebSocket*));

        webSocket->init(0, uWS::CompressOptions::DISABLED, uWS::BackPressure());
        *webSocket->getUserData() = this;
        this->m_connectedWebSocket.clientSSL = webSocket;
        this->m_connectedWebSocketKind = ConnectedWebSocketKind::ClientSSL;
    } else {
        /* Adopting a socket invalidates it, do not rely on it directly to carry any data */
        uWS::WebSocket<false, false, WebSocket*>* webSocket = (uWS::WebSocket<false, false, WebSocket*>*)us_socket_context_adopt_socket(1,
            (us_socket_context_t*)this->scriptExecutionContext()->connnectedWebSocketContext<false, false>(), socket, sizeof(uWS::WebSocketData) + sizeof(WebSocket*));

        webSocket->init(0, uWS::CompressOptions::DISABLED, uWS::BackPressure());
        *webSocket->getUserData() = this;
        this->m_connectedWebSocket.client = webSocket;
        this->m_connectedWebSocketKind = ConnectedWebSocketKind::Client;
    }

    this->didConnect();
}
void WebSocket::didFailToConnect(int32_t code)
{
    m_state = CLOSED;

    // this means we already handled it
    if (this->m_upgradeClient == nullptr) {
        return;
    }

    this->m_upgradeClient = nullptr;

    switch (code) {
    // cancel
    case 0: {
        break;
    }
    // invalid_response
    case 1: {
        auto message = MAKE_STATIC_STRING_IMPL("Invalid response");
        didReceiveMessageError(message);
        break;
    }
    // expected_101_status_code
    case 2: {
        auto message = MAKE_STATIC_STRING_IMPL("Expected 101 status code");
        didReceiveMessageError(message);
        break;
    }
    // missing_upgrade_header
    case 3: {
        auto message = MAKE_STATIC_STRING_IMPL("Missing upgrade header");
        didReceiveMessageError(message);
        break;
    }
    // missing_connection_header
    case 4: {
        auto message = MAKE_STATIC_STRING_IMPL("Missing connection header");
        didReceiveMessageError(message);
        break;
    }
    // missing_websocket_accept_header
    case 5: {
        auto message = MAKE_STATIC_STRING_IMPL("Missing websocket accept header");
        didReceiveMessageError(message);
        break;
    }
    // invalid_upgrade_header
    case 6: {
        auto message = MAKE_STATIC_STRING_IMPL("Invalid upgrade header");
        didReceiveMessageError(message);
        break;
    }
    // invalid_connection_header
    case 7: {
        auto message = MAKE_STATIC_STRING_IMPL("Invalid connection header");
        didReceiveMessageError(message);
        break;
    }
    // invalid_websocket_version
    case 8: {
        auto message = MAKE_STATIC_STRING_IMPL("Invalid websocket version");
        didReceiveMessageError(message);
        break;
    }
    // mismatch_websocket_accept_header
    case 9: {
        auto message = MAKE_STATIC_STRING_IMPL("Mismatch websocket accept header");
        didReceiveMessageError(message);
        break;
    }
    // missing_client_protocol
    case 10: {
        auto message = MAKE_STATIC_STRING_IMPL("Missing client protocol");
        didReceiveMessageError(message);
        break;
    }
    // mismatch_client_protocol
    case 11: {
        auto message = MAKE_STATIC_STRING_IMPL("Mismatch client protocol");
        didReceiveMessageError(message);
        break;
    }
    // timeout
    case 12: {
        auto message = MAKE_STATIC_STRING_IMPL("Timeout");
        didReceiveMessageError(message);
        break;
    }
    // closed
    case 13: {
        auto message = MAKE_STATIC_STRING_IMPL("Closed by client");
        didReceiveMessageError(message);
        break;
    }
    // failed_to_write
    case 14: {
        auto message = MAKE_STATIC_STRING_IMPL("Failed to write");
        didReceiveMessageError(message);
        break;
    }
    // failed_to_connect
    case 15: {
        auto message = MAKE_STATIC_STRING_IMPL("Failed to connect");
        didReceiveMessageError(message);
        break;
    }
    // headers_too_large
    case 16: {
        auto message = MAKE_STATIC_STRING_IMPL("Headers too large");
        didReceiveMessageError(message);
        break;
    }
    // ended
    case 17: {
        auto message = MAKE_STATIC_STRING_IMPL("Closed by server");
        didReceiveMessageError(message);
        break;
    }
    }
}
} // namespace WebCore

extern "C" void WebSocket__didConnect(WebCore::WebSocket* webSocket, us_socket_t* socket, char* bufferedData, size_t len)
{
    webSocket->didConnect(socket, bufferedData, len);
}
extern "C" void WebSocket__didFailToConnect(WebCore::WebSocket* webSocket, int32_t errorCode)
{
    webSocket->didFailToConnect(errorCode);
}