#include "GwChannelList.h"
#include "GwApi.h"
#include "GwHardware.h"
#include "GwSocketServer.h"
#include "GwSerial.h"
#include "GwTcpClient.h"
class GwSerialLog : public GwLogWriter
{
    static const size_t bufferSize = 4096;
    char *logBuffer = NULL;
    int wp = 0;
    GwSerial *writer;
    bool disabled = false;

public:
    GwSerialLog(GwSerial *writer, bool disabled)
    {
        this->writer = writer;
        this->disabled = disabled;
        logBuffer = new char[bufferSize];
        wp = 0;
    }
    virtual ~GwSerialLog() {}
    virtual void write(const char *data)
    {
        if (disabled)
            return;
        int len = strlen(data);
        if ((wp + len) >= (bufferSize - 1))
            return;
        strncpy(logBuffer + wp, data, len);
        wp += len;
        logBuffer[wp] = 0;
    }
    virtual void flush()
    {
        size_t handled = 0;
        if (!disabled)
        {
            while (handled < wp)
            {
                writer->flush();
                size_t rt = writer->sendToClients(logBuffer + handled, -1, true);
                handled += rt;
            }
        }
        wp = 0;
        logBuffer[0] = 0;
    }
};

GwChannelList::GwChannelList(GwLog *logger, GwConfigHandler *config){
    this->logger=logger;
    this->config=config;
}
void GwChannelList::allChannels(ChannelAction action){
    for (auto it=theChannels.begin();it != theChannels.end();it++){
        action(*it);
    }
}
typedef struct {
    int id;
    const char *baud;
    const char *receive;
    const char *send;
    const char *direction;
    const char *toN2K;
    const char *readF;
    const char *writeF;
    const char *name;
} SerialParam;

static  SerialParam serialParameters[]={
    {
        .id=SERIAL1_CHANNEL_ID,
        .baud=GwConfigDefinitions::serialBaud,
        .receive=GwConfigDefinitions::receiveSerial,
        .send=GwConfigDefinitions::sendSerial,
        .direction=GwConfigDefinitions::serialDirection,
        .toN2K=GwConfigDefinitions::serialToN2k,
        .readF=GwConfigDefinitions::serialReadF,
        .writeF=GwConfigDefinitions::serialWriteF,
        .name="Serial"
    },
    {
        .id=SERIAL2_CHANNEL_ID,
        .baud=GwConfigDefinitions::serial2Baud,
        .receive=GwConfigDefinitions::receiveSerial2,
        .send=GwConfigDefinitions::sendSerial2,
        .direction=GwConfigDefinitions::serial2Dir,
        .toN2K=GwConfigDefinitions::serial2ToN2k,
        .readF=GwConfigDefinitions::serial2ReadF,
        .writeF=GwConfigDefinitions::serial2WriteF,
        .name="Serial2"
    }
};

static SerialParam *getSerialParam(int id){
    for (size_t idx=0;idx<sizeof(serialParameters)/sizeof(SerialParam*);idx++){
        if (serialParameters[idx].id == id) return &serialParameters[idx];
    }
    return nullptr;
}

void GwChannelList::addSerial(HardwareSerial *serialStream,int id,const String &mode,int rx,int tx){
    SerialParam *param=getSerialParam(id);
    if (param == nullptr){
        logger->logDebug(GwLog::ERROR,"trying to set up an unknown serial channel: %d",id);
        return;
    }
    if (rx < 0 && tx < 0){
        logger->logDebug(GwLog::ERROR,"useless config for serial %d: both rx/tx undefined");
        return;
    }
    bool canRead=false;
    bool canWrite=false;
    if (mode == "BI"){
        canRead=config->getBool(param->receive);
        canWrite=config->getBool(param->send);
    }
    if (mode == "TX"){
        canWrite=true;
    }
    if (mode == "RX"){
        canRead=true;
    }
    if (mode == "UNI"){
        String cfgMode=config->getString(param->direction);
        if (cfgMode == "receive"){
            canRead=true;
        }
        if (cfgMode == "send"){
            canWrite=true;
        }
    }
    if (rx < 0) canRead=false;
    if (tx < 0) canWrite=false;
    LOG_DEBUG(GwLog::DEBUG,"serial set up: mode=%s,rx=%d,canRead=%d,tx=%d,canWrite=%d",
        mode.c_str(),rx,(int)canRead,tx,(int)canWrite);
    serialStream->begin(config->getInt(param->baud,115200),SERIAL_8N1,rx,tx);
    GwSerial *serial = new GwSerial(logger, serialStream, id, canRead);
    LOG_DEBUG(GwLog::LOG, "starting serial %d ", id);
    GwChannel *channel = new GwChannel(logger, param->name, id);
    channel->setImpl(serial);
    channel->begin(
        canRead || canWrite,
        canWrite,
        canRead,
        config->getString(param->readF),
        config->getString(param->writeF),
        false,
        config->getBool(param->toN2K),
        false,
        false);
    LOG_DEBUG(GwLog::LOG, "%s", channel->toString().c_str());
    theChannels.push_back(channel);
}
void GwChannelList::begin(bool fallbackSerial){
    LOG_DEBUG(GwLog::DEBUG,"GwChannelList::begin");
    GwChannel *channel=NULL;
    //usb
    if (! fallbackSerial){
        GwSerial *usb=new GwSerial(NULL,&USBSerial,USB_CHANNEL_ID);
        USBSerial.begin(config->getInt(config->usbBaud));
        logger->setWriter(new GwSerialLog(usb,config->getBool(config->usbActisense)));
        logger->prefix="GWSERIAL:";
        channel=new GwChannel(logger,"USB",USB_CHANNEL_ID);
        channel->setImpl(usb);
        channel->begin(true,
            config->getBool(config->sendUsb),
            config->getBool(config->receiveUsb),
            config->getString(config->usbReadFilter),
            config->getString(config->usbWriteFilter),
            false,
            config->getBool(config->usbToN2k),
            config->getBool(config->usbActisense),
            config->getBool(config->usbActSend)
        );
        theChannels.push_back(channel);
        LOG_DEBUG(GwLog::LOG,"%s",channel->toString().c_str());
    }
    //TCP server
    sockets=new GwSocketServer(config,logger,MIN_TCP_CHANNEL_ID);
    sockets->begin();
    channel=new GwChannel(logger,"TCPserver",MIN_TCP_CHANNEL_ID,MIN_TCP_CHANNEL_ID+10);
    channel->setImpl(sockets);
    channel->begin(
        true,
        config->getBool(config->sendTCP),
        config->getBool(config->readTCP),
        config->getString(config->tcpReadFilter),
        config->getString(config->tcpWriteFilter),
        config->getBool(config->sendSeasmart),
        config->getBool(config->tcpToN2k),
        false,
        false
    );
    LOG_DEBUG(GwLog::LOG,"%s",channel->toString().c_str());
    theChannels.push_back(channel);

    //serial 1
    #ifndef GWSERIAL_TX
      #define GWSERIAL_TX -1
    #endif
    #ifndef GWSERIAL_RX
      #define GWSERIAL_RX -1
    #endif
    #ifdef GWSERIAL_MODE
        addSerial(&Serial1,SERIAL1_CHANNEL_ID,GWSERIAL_MODE,GWSERIAL_RX,GWSERIAL_TX);
    #endif
    //serial 2
    #ifndef GWSERIAL2_TX
      #define GWSERIAL2_TX -1
    #endif
    #ifndef GWSERIAL2_RX
      #define GWSERIAL2_RX -1
    #endif
    #ifdef GWSERIAL2_MODE
        addSerial(&Serial2,SERIAL2_CHANNEL_ID,GWSERIAL2_MODE,GWSERIAL2_RX,GWSERIAL2_TX);
    #endif
    //tcp client
    bool tclEnabled=config->getBool(config->tclEnabled);
    channel=new GwChannel(logger,"TCPClient",TCP_CLIENT_CHANNEL_ID);
    if (tclEnabled){
        client=new GwTcpClient(logger);
        client->begin(TCP_CLIENT_CHANNEL_ID,
            config->getString(config->remoteAddress),
            config->getInt(config->remotePort),
            config->getBool(config->readTCL)
        );
        channel->setImpl(client);
    }
    channel->begin(
        tclEnabled,
        config->getBool(config->sendTCL),
        config->getBool(config->readTCL),
        config->getString(config->tclReadFilter),
        config->getString(config->tclReadFilter),
        config->getBool(config->tclSeasmart),
        config->getBool(config->tclToN2k),
        false,
        false
        );
    theChannels.push_back(channel);
    LOG_DEBUG(GwLog::LOG,"%s",channel->toString().c_str());  
    logger->flush();
}
int GwChannelList::getJsonSize(){
    int rt=0;
    allChannels([&](GwChannel *c){
        rt+=c->getJsonSize();
    });
    return rt+20;
}
void GwChannelList::toJson(GwJsonDocument &doc){
    if (sockets) doc["numClients"]=sockets->numClients();
    if (client){
        doc["clientCon"]=client->isConnected();
        doc["clientErr"]=client->getError();
    }
    else{
        doc["clientCon"]=false;
        doc["clientErr"]="disabled";
    }
    allChannels([&](GwChannel *c){
        c->toJson(doc);
    });
}
GwChannel *GwChannelList::getChannelById(int sourceId){
    for (auto it=theChannels.begin();it != theChannels.end();it++){
        if ((*it)->isOwnSource(sourceId)) return *it;
    }
    return NULL;
}

void GwChannelList::fillStatus(GwApi::Status &status){
    GwChannel *channel=getChannelById(USB_CHANNEL_ID);
    if (channel){
        status.usbRx=channel->countRx();
        status.usbTx=channel->countTx();
    }
    channel=getChannelById(SERIAL1_CHANNEL_ID);
    if (channel){
        status.serRx=channel->countRx();
        status.serTx=channel->countTx();
    }
    channel=getChannelById(MIN_TCP_CHANNEL_ID);
    if (channel){
        status.tcpSerRx=channel->countRx();
        status.tcpSerTx=channel->countTx();
    }
    channel=getChannelById(TCP_CLIENT_CHANNEL_ID);
    if (channel){
        status.tcpClRx=channel->countRx();
        status.tcpClTx=channel->countTx();
    }
}