/****************************************************************************
 Copyright (c) 2017-2022 Xiamen Yaji Software Co., Ltd.

 http://www.cocos.com

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated engine source code (the "Software"), a limited,
 worldwide, royalty-free, non-assignable, revocable and non-exclusive license
 to use Cocos Creator solely to develop games on your target platforms. You shall
 not use Cocos Creator software for developing other software or tools that's
 used for developing games. You are not granted to publish, distribute,
 sublicense, and/or sell copies of Cocos Creator.

 The software or tools in this License Agreement are licensed, not sold.
 Xiamen Yaji Software Co., Ltd. reserves all rights not expressly granted to you.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
****************************************************************************/

#include "base/Data.h"
#include "network/WebSocket.h"

#import "SocketRocket/SocketRocket.h"

#if !__has_feature(objc_arc)
    #error WebSocket must be compiled with ARC enabled
#endif

namespace {
ccstd::vector<cc::network::WebSocket *> websocketInstances;
}

@interface WebSocketImpl : NSObject <SRWebSocketDelegate> {
}
@end

//

@implementation WebSocketImpl {
    SRWebSocket *_ws;
    cc::network::WebSocket *_ccws;
    cc::network::WebSocket::Delegate *_delegate;

    ccstd::string _url;
    ccstd::string _selectedProtocol;
    bool _isDestroyed;
}

- (id)initWithURL:(const ccstd::string &)url protocols:(NSArray<NSString *> *)protocols allowsUntrustedSSLCertificates:(BOOL)allowsUntrustedSSLCertificates ws:(cc::network::WebSocket *)ccws delegate:(const cc::network::WebSocket::Delegate &)delegate {
    if (self = [super init]) {
        _ccws = ccws;
        _delegate = const_cast<cc::network::WebSocket::Delegate *>(&delegate);
        _url = url;
        NSURL *nsUrl = [[NSURL alloc] initWithString:[[NSString alloc] initWithUTF8String:_url.c_str()]];
        _ws = [[SRWebSocket alloc] initWithURL:nsUrl protocols:protocols allowsUntrustedSSLCertificates:allowsUntrustedSSLCertificates];
        _ws.delegate = self;
        [_ws open];
        _isDestroyed = false;
    }
    return self;
}

- (void)dealloc {
    // NSLog(@"WebSocketImpl-apple dealloc: %p, SRWebSocket ref: %ld", self, CFGetRetainCount((__bridge CFTypeRef)_ws));
}

- (void)sendString:(NSString *)message {
    [_ws sendString:message error:nil];
}

- (void)sendData:(NSData *)data {
    [_ws sendData:data error:nil];
}

- (void)close {
    _isDestroyed = true;
    _ccws->addRef();
    _delegate->onClose(_ccws, 1000, "close_normal", true);
    [_ws close];
    _ccws->release();
}

- (void)closeAsync {
    [_ws close];
}

- (cc::network::WebSocket::State)getReadyState {
    cc::network::WebSocket::State ret;
    SRReadyState state = _ws.readyState;
    switch (state) {
        case SR_OPEN:
            ret = cc::network::WebSocket::State::OPEN;
            break;
        case SR_CONNECTING:
            ret = cc::network::WebSocket::State::CONNECTING;
            break;
        case SR_CLOSING:
            ret = cc::network::WebSocket::State::CLOSING;
            break;
        default:
            ret = cc::network::WebSocket::State::CLOSED;
            break;
    }
    return ret;
}

- (const ccstd::string &)getUrl {
    return _url;
}

- (const ccstd::string &)getProtocol {
    return _selectedProtocol;
}

- (cc::network::WebSocket::Delegate *)getDelegate {
    return (cc::network::WebSocket::Delegate *)_delegate;
}

// Delegate methods

- (void)webSocketDidOpen:(SRWebSocket *)webSocket;
{
    if (!_isDestroyed) {
        // NSLog(@"Websocket Connected");
        if (webSocket.protocol != nil)
            _selectedProtocol = [webSocket.protocol UTF8String];
        _delegate->onOpen(_ccws);
    } else {
        NSLog(@"WebSocketImpl webSocketDidOpen was destroyed!");
    }
}

- (void)webSocket:(SRWebSocket *)webSocket didFailWithError:(NSError *)error;
{
    if (!_isDestroyed) {
        NSLog(@":( Websocket Failed With Error %@", error);
        _delegate->onError(_ccws, cc::network::WebSocket::ErrorCode::UNKNOWN);
        [self webSocket:webSocket didCloseWithCode:0 reason:@"onerror" wasClean:YES];
    } else {
        NSLog(@"WebSocketImpl didFailWithError was destroyed!");
    }
}

- (void)webSocket:(SRWebSocket *)webSocket didReceiveMessageWithString:(nonnull NSString *)string {
    if (!_isDestroyed) {
        cc::network::WebSocket::Data data;
        data.bytes = const_cast<char *>([string cStringUsingEncoding:NSUTF8StringEncoding]);
        data.len = [string lengthOfBytesUsingEncoding:NSUTF8StringEncoding];
        data.isBinary = false;
        data.issued = 0;
        data.ext = nullptr;

        _delegate->onMessage(_ccws, data);
    } else {
        NSLog(@"WebSocketImpl didReceiveMessageWithString was destroyed!");
    }
}

- (void)webSocket:(SRWebSocket *)webSocket didReceiveMessageWithData:(NSData *)nsData {
    if (!_isDestroyed) {
        cc::network::WebSocket::Data data;
        data.bytes = (char *)nsData.bytes;
        data.len = nsData.length;
        data.isBinary = true;
        data.issued = 0;
        data.ext = nullptr;
        _delegate->onMessage(_ccws, data);
    } else {
        NSLog(@"WebSocketImpl didReceiveMessageWithData was destroyed!");
    }
}

- (void)webSocket:(SRWebSocket *)webSocket didCloseWithCode:(NSInteger)code reason:(NSString *)reason wasClean:(BOOL)wasClean {
    if (!_isDestroyed) {
        auto codeArg = static_cast<uint16_t>(code);
        ccstd::string reasonArg = reason == nil ? "no_resaon" : ccstd::string([reason UTF8String]);
        bool wasCleanArg = static_cast<bool>(wasClean);
        _delegate->onClose(_ccws, codeArg, reasonArg, wasCleanArg);
    }
    else
        NSLog(@"WebSocketImpl didCloseWithCode was destroyed!");
}

@end

namespace cc {

namespace network {

void WebSocket::closeAllConnections() {
    if (websocketInstances.empty()) {
        return;
    }

    for (auto iter = websocketInstances.cbegin(); iter != websocketInstances.cend(); ++iter) {
        (*iter)->close();
        ++iter;
    }

    websocketInstances.clear();
}

WebSocket::WebSocket() {
    websocketInstances.push_back(this);
}

WebSocket::~WebSocket() {
    // NSLog(@"In the destructor of WebSocket-apple (%p).", this);
    if (websocketInstances.empty()) {
        return;
    }

    auto iter = std::find(websocketInstances.begin(), websocketInstances.end(), this);
    if (iter != websocketInstances.end()) {
        websocketInstances.erase(iter);
    } else {
        NSLog(@"ERROR: WebSocket instance wasn't added to the container which saves websocket instances!");
    }
}

bool WebSocket::init(const Delegate &delegate,
                     const ccstd::string &url,
                     const ccstd::vector<ccstd::string> *protocols /* = nullptr*/,
                     const ccstd::string &caFilePath /* = ""*/) {
    if (url.empty())
        return false;

    NSMutableArray *nsProtocols = [[NSMutableArray alloc] init];
    if (protocols != nullptr) {
        for (const auto &protocol : *protocols) {
            [nsProtocols addObject:[[NSString alloc] initWithUTF8String:protocol.c_str()]];
        }
    }
    _impl = [[WebSocketImpl alloc] initWithURL:url protocols:nsProtocols allowsUntrustedSSLCertificates:NO ws:this delegate:delegate];

    return _impl != nil;
}

void WebSocket::send(const ccstd::string &message) {
    if ([_impl getReadyState] == State::OPEN) {
        NSString *str = [[NSString alloc] initWithBytes:message.data() length:message.length() encoding:NSUTF8StringEncoding];
        [_impl sendString:str];
    } else {
        NSLog(@"Couldn't send message since websocket wasn't opened!");
    }
}

void WebSocket::send(const unsigned char *binaryMsg, unsigned int len) {
    if ([_impl getReadyState] == State::OPEN) {
        NSData *data = [[NSData alloc] initWithBytes:binaryMsg length:(NSUInteger)len];
        [_impl sendData:data];
    } else {
        NSLog(@"Couldn't send message since websocket wasn't opened!");
    }
}

void WebSocket::close() {
    if ([_impl getReadyState] == State::CLOSING || [_impl getReadyState] == State::CLOSED) {
        NSLog(@"WebSocket (%p) was closed, no need to close it again!", this);
        return;
    }

    [_impl close];
}

void WebSocket::closeAsync() {
    if ([_impl getReadyState] == State::CLOSING || [_impl getReadyState] == State::CLOSED) {
        NSLog(@"WebSocket (%p) was closed, no need to close it again!", this);
        return;
    }

    [_impl closeAsync];
}

void WebSocket::closeAsync(int code, const ccstd::string &reason) {
    //lws_close_reason() replacement required
    closeAsync();
}

ccstd::string WebSocket::getExtensions() const {
    //TODO websocket extensions
    return "";
}

size_t WebSocket::getBufferedAmount() const {
    //TODO pending send bytes
    return 0;
}

WebSocket::State WebSocket::getReadyState() const {
    return [_impl getReadyState];
}

const ccstd::string &WebSocket::getUrl() const {
    return [_impl getUrl];
}

const ccstd::string &WebSocket::getProtocol() const {
    return [_impl getProtocol];
}

WebSocket::Delegate *WebSocket::getDelegate() const {
    return [_impl getDelegate];
}

} // namespace network

} // namespace cc