// Copyright 2019-2024 The Hush developers
// Released under the GPLv3
#include "chatmodel.h"
#include "settings.h"
#include "ui_confirm.h"
#include "controller.h"
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "ui_requestContactDialog.h"
#include "addressbook.h"
#include "ui_contactrequest.h"
#include <QtWidgets>
#include <QUuid>
#include "DataStore/DataStore.h"

using namespace std; 

ContactRequest contactRequest = ContactRequest();

ChatModel::ChatModel(std::map<QString, ChatItem> chatItems)
{
    this->chatItems = chatItems;
}

ChatModel::ChatModel(std::vector<ChatItem> chatItems)
{
   this->setItems(chatItems);
}

std::map<QString, ChatItem> ChatModel::getItems()
{
    return this->chatItems;
}

void ChatModel::setItems(std::map<QString, ChatItem> items)
{
    this->chatItems = chatItems;
}

void ChatModel::setItems(std::vector<ChatItem> items)
{
    for(ChatItem c : items)
    {
        this->chatItems[ChatIDGenerator::getInstance()->generateID(c)] = c; //this->generateChatItemID(c)] = c;
    }
}

void ChatModel::clear()
{
    this->chatItems.clear();
}

void ChatModel::addMessage(ChatItem item)
{
    QString key = ChatIDGenerator::getInstance()->generateID(item); //this->generateChatItemID(item);
    this->chatItems[key] = item;
}

void ChatModel::addMessage(QString timestamp, ChatItem item)
{
    QString key = ChatIDGenerator::getInstance()->generateID(item);//this->generateChatItemID(item);
    timestamp = "0";
    this->chatItems[key] = item;
}

void ChatModel::showMessages()
{
/*
    for(auto &c : this->chatItems)
    {

    }
 */         
}

void ChatModel::addAddressbylabel(QString address, QString label)
{
    this->AddressbyLabelMap[address] = label;
}

QString ChatModel::Addressbylabel(QString address)
{
    if(this->AddressbyLabelMap.count(address) > 0)
    {
        return this->AddressbyLabelMap[address];
    }

    return QString("0xdeadbeef");
}
  
void MainWindow::renderContactRequest(){

        Ui_requestDialog requestContact;
        QDialog dialog(this);
        requestContact.setupUi(&dialog);
        Settings::saveRestore(&dialog);

        QString icon;
        auto theme = Settings::getInstance()->get_theme_name();
        if (theme == "Dark" || theme == "Midnight") {
           icon = ":/icons/res/unknownWhite.png";
        }else{
            icon = ":/icons/res/unknownBlack.png";
        }

         QPixmap unknownWhite(icon);
         QIcon addnewAddrIcon(unknownWhite);

               

         ///////// Tableview for incoming contact request
        int requestsize = DataStore::getChatDataStore()->getAllNewContactRequests().size();  
        requestContact.requestContact->setRowCount(requestsize);    
        requestContact.requestContact->setColumnCount(2);
        QStringList request_TableHeader;
        request_TableHeader<<"Address"<<"Date";
        requestContact.requestContact->setHorizontalHeaderLabels(request_TableHeader);
        requestContact.requestContact->setShowGrid(false);
        requestContact.requestContact->setEditTriggers(QAbstractItemView::NoEditTriggers);
        requestContact.requestContact->setSelectionBehavior(QAbstractItemView::SelectRows);
        requestContact.requestContact->setSelectionMode(QAbstractItemView::SingleSelection);
        requestContact.requestContact->setColumnWidth(0,205);
        

        int i=0;
        
        for (auto &c : DataStore::getChatDataStore()->getAllNewContactRequests())
            
        {

        int timestamp =  c.second.getTimestamp();
        QDateTime myDateTime;
        myDateTime.setTime_t(timestamp);
        QString timestamphtml = myDateTime.toString("yyyy-MM-dd");

        requestContact.requestContact->setItem(i, 0, new QTableWidgetItem(c.second.getRequestZaddr()));
        requestContact.requestContact->setItem(i, 1, new QTableWidgetItem(timestamphtml));
        requestContact.zaddrnew->setVisible(false);
        requestContact.zaddrnew->setText(c.second.getRequestZaddr());
        requestContact.requestContact->sortByColumn(1, Qt::DescendingOrder);
              
        i++;
         
        }


        QStandardItemModel* contactRequestOld = new QStandardItemModel();

            for (auto &c : DataStore::getChatDataStore()->getAllOldContactRequests())
            {
                QStandardItem* Items = new QStandardItem(c.second.getContact());
                contactRequestOld->appendRow(Items);
                requestContact.requestContactOld->setModel(contactRequestOld);
                requestContact.zaddrold->setVisible(false);
                requestContact.zaddrold->setText(c.second.getRequestZaddr());
                    
            }

        QObject::connect(requestContact.requestContact, &QTableView::clicked, [&] () {

        for (auto &c : DataStore::getChatDataStore()->getAllRawChatItems()){
        QModelIndex index = requestContact.requestContact->currentIndex();
        QString label_contact = index.data(Qt::DisplayRole).toString();
        QStandardItemModel* contactMemo = new QStandardItemModel();
           
        if  ((c.second.isOutgoing() == false) && (label_contact == c.second.getRequestZaddr() && (c.second.getMemo().startsWith("{") == false)))
        
        {

          QStandardItem* Items = new QStandardItem(c.second.getMemo());
            contactMemo->appendRow(Items);
            requestContact.requestMemo->setModel(contactMemo);   
            requestContact.requestMemo->show();
           
            requestContact.requestCID->setText(c.second.getCid());
            requestContact.requestCID->setVisible(false);
            requestContact.requestZaddr->setText(c.second.getRequestZaddr());
            requestContact.requestMyAddr->setText(c.second.getAddress());

            }else{

            }
    
    }
            
   });

   QObject::connect(requestContact.requestContactOld, &QTableView::clicked, [&] () {

    for (auto &c : DataStore::getChatDataStore()->getAllRawChatItems()){
        QModelIndex index = requestContact.requestContactOld->currentIndex();
        QString label_contactold = index.data(Qt::DisplayRole).toString();
        QStandardItemModel* contactMemo = new QStandardItemModel();
           
          if  ((c.second.isOutgoing() == false) && (label_contactold == c.second.getContact()) && (c.second.getMemo().startsWith("{") == false))
        
        {

          QStandardItem* Items = new QStandardItem(c.second.getMemo());
            contactMemo->appendRow(Items);
            requestContact.requestMemo->setModel(contactMemo);   
            requestContact.requestMemo->show();
           
            requestContact.requestCID->setText(c.second.getCid());
            requestContact.requestCID->setVisible(false);
            requestContact.requestZaddr->setText(c.second.getRequestZaddr());
            requestContact.requestMyAddr->setText(c.second.getAddress());

            }else{

            }
        }  
            
   });
   
  QObject::connect(requestContact.pushButton, &QPushButton::clicked, [&] () {

            QString cid = requestContact.requestCID->text();
            auto addr = requestContact.requestZaddr->text().trimmed();
            QString newLabel = requestContact.requestLabel->text().trimmed();
            auto myAddr = requestContact.requestMyAddr->text().trimmed();

            QString avatar = QString(":/icons/res/") + requestContact.comboBoxAvatar->currentText() + QString(".png");

             if (addr.isEmpty() || newLabel.isEmpty()) 
        {
             QMessageBox::critical(
                this, 
                QObject::tr("Address or Label Error"), 
                QObject::tr("Address or Label cannot be empty"), 
                QMessageBox::Ok
                );
            return;
        }

         // Don't allow duplicate address labels.      
                  
        if (!AddressBook::getInstance()->getAddressForLabel(newLabel).isEmpty()) 
        {
            QMessageBox::critical(
                this, 
                QObject::tr("Label Error"), 
                QObject::tr("The label '%1' already exists. Please remove the existing label.").arg(newLabel), 
                QMessageBox::Ok
            );
            qDebug()<<"Doppelter Name";
            return;
        }

        // Test if address is valid.
        if (!Settings::isValidAddress(addr)) 
        {
          QMessageBox::critical(
                this, 
                QObject::tr("Address Format Error"), 
                QObject::tr("%1 doesn't seem to be a valid hush address.").arg(addr), 
                QMessageBox::Ok
            );
            return;
        } 

       
        
        AddressBook::getInstance()->addAddressLabel(newLabel, addr, myAddr, cid, avatar);
        rpc->refreshContacts(
        ui->listContactWidget);

        QMessageBox::information(this, "Added Contact","successfully added your new contact. You can now Chat with this contact");  
        dialog.close();
    });

 dialog.exec();

}

void ChatModel::addCid(QString tx, QString cid)
{
    this->cidMap[tx] = cid;
}

void ChatModel::addHeader(QString tx, QString headerbytes)
{
    this->headerMap[tx] = headerbytes;
}

void ChatModel::addMemo(QString tx, QString memo)
{
    this->OldMemoByTx[tx] = memo;
}



void ChatModel::addrequestZaddr(QString tx, QString requestZaddr)
{
    this->requestZaddrMap[tx] = requestZaddr;
}

void ChatModel::addconfirmations(QString tx, int confirmation)
{
    this->confirmationsMap[tx] = confirmation;
}

QString ChatModel::getCidByTx(QString tx)
{
    if(this->cidMap.count(tx) > 0)
    {
        return this->cidMap[tx];
    }

    return QString("0xdeadbeef");
}

QString ChatModel::getMemoByTx(QString tx)
{
    if(this->OldMemoByTx.count(tx) > 0)
    {
        return this->OldMemoByTx[tx];
    }

    return QString("0xdeadbeef");
}




QString ChatModel::getHeaderByTx(QString tx)
{
    if(this->headerMap.count(tx) > 0)
    {
        return this->headerMap[tx];
    }

    return QString("0xdeadbeef");
}

QString ChatModel::getConfirmationByTx(QString tx)
{
    if(this->confirmationsMap.count(tx) > 0)
    {
        return this->confirmationsMap[tx];
    }

    return QString("0xdeadbeef");
}

QString ChatModel::getrequestZaddrByTx(QString tx)
{
    if(this->requestZaddrMap.count(tx) > 0)
    {
        return this->requestZaddrMap[tx];
    }

    return QString("0xdeadbeef");
}

void ChatModel::killCidCache()
{
    this->cidMap.clear();
}

void ChatModel::killrequestZaddrCache()
{
    this->requestZaddrMap.clear();
}

void ChatModel::killConfirmationCache()
{
    this->confirmationsMap.clear();
}
void ChatModel::killMemoCache()
{
    this->OldMemoByTx.clear();
}

QString MainWindow::createHeaderMemo(QString type, QString cid, QString zaddr, QString headerbytes, QString publickey, int version=0, int headerNumber=1)
{
    
    QString header="";
    QJsonDocument j;
    QJsonObject h;
    // We use short keynames to use less space for metadata and so allow
    // the user to send more actual data in memos
    h["h"]   = headerNumber;    // integer, header number starting from 1
    h["v"]   = version;         // integer, HushChat version. currently 0
    h["z"]   = zaddr;           // string, zaddr to respond to
    h["cid"] = cid;             // string, conversation id (UUID)
    h["t"]   = type;            // string, Memo or incoming contact request
    h["e"]   = headerbytes;     // string, hex-encoded libsodium headerbytes from crypto_secretstream_xchacha20poly1305_init_push()
    h["p"]   = publickey;       // string, hex-encoded libsodium public key from crypto_kx_seed_keypair()


    j.setObject(h);
    header = j.toJson();
    return header;
}


// Create a Tx from the current state of the Chat page. 
Tx MainWindow::createTxFromChatPage() {
   Tx tx;
    CAmount totalAmt;
    // For each addr/amt in the Chat tab
  {
       
        QString amtStr = "0";
        CAmount amt;  

         
            amt = CAmount::fromDecimalString("0");
            totalAmt = totalAmt + amt;

  
    for(auto &c : AddressBook::getInstance()->getAllAddressLabels())

     if (ui->contactNameMemo->text().trimmed() == c.getName()) {
     
            QString cid = c.getCid();
            QString myAddr = c.getMyAddress();
            QString type = "Memo";
            QString addr = c.getPartnerAddress();

             /////////User input for chatmemos
        QString memoplain = ui->memoTxtChat->toPlainText().trimmed();

  /////////We convert the user input from QString to unsigned char*, so we can encrypt it later
        int lengthmemo = memoplain.length();

        char *memoplainchar = NULL;
        memoplainchar = new char[lengthmemo+2];
        strncpy(memoplainchar, memoplain.toUtf8(), lengthmemo +1);

        QString pubkey = this->getPubkeyByAddress(addr);
        QString passphraseHash = DataStore::getChatDataStore()->getPassword();
        int length = passphraseHash.length();

 ////////////////Generate the secretkey for our message encryption

        char *hashEncryptionKeyraw = NULL;
        hashEncryptionKeyraw = new char[length+1];
        strncpy(hashEncryptionKeyraw, passphraseHash.toUtf8(), length+1);

        #define MESSAGEAS1 ((const unsigned char *) hashEncryptionKeyraw)
        #define MESSAGEAS1_LEN length
    

        unsigned char sk[crypto_kx_SECRETKEYBYTES];
        unsigned char pk[crypto_kx_PUBLICKEYBYTES];
        unsigned char server_rx[crypto_kx_SESSIONKEYBYTES], server_tx[crypto_kx_SESSIONKEYBYTES];
      
        if (crypto_kx_seed_keypair(pk,sk, MESSAGEAS1) !=0) {
               this->logger->write("Suspicious keypair, bail out ");
             //  qDebug() << __func__<< ": Suspicious client public outgoing key from crypto_kx_seed_keypair, aborting!";
               return tx;
          }

         ////////////////Get the pubkey from Bob, so we can create the share key

        const QByteArray pubkeyBobArray = QByteArray::fromHex(pubkey.toLatin1());
        const unsigned char *pubkeyBob = reinterpret_cast<const unsigned char *>(pubkeyBobArray.constData());

        /////Create the shared key for sending the message

            if (crypto_kx_server_session_keys(server_rx, server_tx, pk, sk, pubkeyBob) != 0) {
               this->logger->write("Suspicious client public send key, bail out ");
               // << __func__ << ": Suspicious client public send key from crypto_kx_server_session_keys, aborting!";
               return tx;
             }

    
            // Let's try to preserve Unicode characters
            QByteArray ba_memo = memoplain.toUtf8();
            int ba_memo_length = ba_memo.size();

            #define MESSAGE (const unsigned char *) ba_memo.data()
            #define MESSAGE_LEN ba_memo_length


    ////////////Now lets encrypt the message Alice send to Bob//////////////////////////////
             //#define MESSAGE (const unsigned char *) memoplainchar
             //#define MESSAGE_LEN lengthmemo
             #define CIPHERTEXT_LEN (crypto_secretstream_xchacha20poly1305_ABYTES + MESSAGE_LEN)
             unsigned char ciphertext[CIPHERTEXT_LEN];
             unsigned char header[crypto_secretstream_xchacha20poly1305_HEADERBYTES];

            crypto_secretstream_xchacha20poly1305_state state;

            /* Set up a new stream: initialize the state and create the header */
            crypto_secretstream_xchacha20poly1305_init_push(&state, header, server_tx);


             /* Now, encrypt the first chunk. `c1` will contain an encrypted,
            * authenticated representation of `MESSAGE_PART1`. */
            crypto_secretstream_xchacha20poly1305_push
            (&state, ciphertext, NULL, MESSAGE, MESSAGE_LEN, NULL, 0, crypto_secretstream_xchacha20poly1305_TAG_FINAL);

            ////Create the HM for this message
            QString headerbytes = QByteArray(reinterpret_cast<const char*>(header), crypto_secretstream_xchacha20poly1305_HEADERBYTES).toHex();
            QString publickeyAlice = QByteArray(reinterpret_cast<const char*>(pk), crypto_kx_PUBLICKEYBYTES).toHex();


            QString hmemo= createHeaderMemo(type,cid,myAddr,headerbytes,publickeyAlice);

             /////Ciphertext Memo
            QString memo = QByteArray(reinterpret_cast<const char*>(ciphertext), CIPHERTEXT_LEN).toHex();
              
             tx.toAddrs.push_back(ToFields{addr, amt, hmemo});
             tx.toAddrs.push_back(ToFields{addr, amt, memo});

   } 
   }

    tx.fee = Settings::getMinerFee();

     return tx;

}

void MainWindow::sendChat() {

////////////////////////////Todo: Check if a Contact is selected//////////

    // Create a Tx from the values on the send tab. Note that this Tx object
    // might not be valid yet.
 
   QString Name = ui->contactNameMemo->text();

      if ((ui->contactNameMemo->text().isEmpty()) || (ui->memoTxtChat->toPlainText().trimmed().isEmpty())) {
     
        QMessageBox msg(QMessageBox::Critical, tr("You have to select a contact and insert a Memo"),
        tr("You have selected no Contact from Contactlist,\n")  + tr("\nor your Memo is empty"),
        QMessageBox::Ok, this);
        ui->memoTxtChat->setEnabled(true);

        msg.exec();
        return;
    }

    int max = 235;
    QString chattext = ui->memoTxtChat->toPlainText();
    int size = chattext.size();

    if (size > max){
     
        QMessageBox msg(QMessageBox::Critical, tr("Your Message is too long"),
        tr("You can only write messages with 235 character maximum \n")  + tr("\n Please reduce your message to 235 character."),
        QMessageBox::Ok, this);

        msg.exec();
        return;
    }

    Tx tx = createTxFromChatPage();

    QString error = doSendChatTxValidations(tx);

    if (!error.isEmpty()) {
        // Something went wrong, so show an error and exit
        QMessageBox msg(QMessageBox::Critical, tr("Message Error"), error,
                        QMessageBox::Ok, this);

        msg.exec();
        ui->memoTxtChat->setEnabled(true);

        // abort the Tx
        return;
    }

        auto movie = new QMovie(this);
        auto movie1 = new QMovie(this);
        movie->setFileName(":/img/res/loaderblack.gif");
        movie1->setFileName(":/img/res/loaderwhite.gif");
     
        auto theme = Settings::getInstance()->get_theme_name();
        if (theme == "Dark" || theme == "Midnight") {

        connect(movie, &QMovie::frameChanged, [=]{
        ui->sendChatButton->setIcon(movie->currentPixmap());
        });      
        movie->start();
        ui->sendChatButton->show();
        ui->sendChatButton->setEnabled(false);
        ui->memoTxtChat->setEnabled(true);
             
        } else {

        connect(movie1, &QMovie::frameChanged, [=]{
        ui->sendChatButton->setIcon(movie1->currentPixmap());
        });      
        movie1->start();
        ui->sendChatButton->show();
        ui->sendChatButton->setEnabled(false);
        ui->memoTxtChat->setEnabled(true);

        }

        ui->memoTxtChat->clear();
        
        // And send the Tx
        rpc->executeTransaction(tx, true,
            [=] (QString txid) { 
                ui->statusBar->showMessage(Settings::txidStatusMessage + " " + txid);
                

            QTimer::singleShot(1000, [=]() {
         
            if (theme == "Dark" || theme == "Midnight") {
            QPixmap send(":/icons/res/send-white.png");
            QIcon sendIcon(send);
            ui->sendChatButton->setIcon(sendIcon);
            movie->stop();
            ui->sendChatButton->setEnabled(true);
            ui->memoTxtChat->setEnabled(true);

             }else{
            
            QPixmap send(":/icons/res/sendBlack.png");
            QIcon sendIcon(send);
            ui->sendChatButton->setIcon(sendIcon);
            movie1->stop();
            ui->sendChatButton->setEnabled(true);
            ui->memoTxtChat->setEnabled(true);
             }
                    
                  });
                
                // Force a UI update so we get the unconfirmed Tx
                rpc->refresh(true);
                ui->memoTxtChat->clear();

            },
            // Errored out
            [=] (QString opid, QString errStr) {
                ui->statusBar->showMessage(QObject::tr(" Tx ") % opid % QObject::tr(" failed"), 15 * 1000);
                ui->memoTxtChat->setEnabled(true);
                
                if (!opid.isEmpty())
                    errStr = QObject::tr("The transaction with id ") % opid % QObject::tr(" failed. The error was") + ":\n\n" + errStr;            

                QMessageBox::critical(this, QObject::tr("Transaction Error"), errStr, QMessageBox::Ok);
                         movie->stop();
      
              
            if (theme == "Dark" || theme == "Midnight") {
            QPixmap send(":/icons/res/send-white.png");
            QIcon sendIcon(send);
            ui->sendChatButton->setIcon(sendIcon);
            movie->stop();
            ui->sendChatButton->setEnabled(true);
            ui->memoTxtChat->setEnabled(true);
             }else{
            
            QPixmap send(":/icons/res/sendBlack.png");
            QIcon sendIcon(send);
            ui->sendChatButton->setIcon(sendIcon);
            movie1->stop();
            ui->sendChatButton->setEnabled(true);
            ui->memoTxtChat->setEnabled(true);
             }
                    
                   
                           
            }
        );

    }        

QString MainWindow::doSendChatTxValidations(Tx tx) {
    // Check to see if we have enough verified funds to send the Tx.

    CAmount total;
    for (auto toAddr : tx.toAddrs) {
        if (!Settings::isValidAddress(toAddr.addr)) {
            QString addr = (toAddr.addr.length() > 100 ? toAddr.addr.left(100) + "..." : toAddr.addr);
            return QString(tr("Recipient Address ")) % addr % tr(" is Invalid");
            ui->memoTxtChat->setEnabled(true);
        }
    
        // This technically shouldn't be possible, but issue #62 seems to have discovered a bug
        // somewhere, so just add a check to make sure. 
        if (toAddr.amount.toqint64() < 0) {
            return QString(tr("Amount for address '%1' is invalid!").arg(toAddr.addr));
        }

        total = total + toAddr.amount;
    }
    total = total + tx.fee;

    auto available = rpc->getModel()->getAvailableBalance();

    if (available < total) {
        return tr("Not enough available funds to send this transaction\n\nHave: %1\nNeed: %2\n\nNote: Funds need 1 confirmations before they can be spent")
            .arg(available.toDecimalhushString(), total.toDecimalhushString());
            ui->memoTxtChat->setEnabled(true);
    }

    return "";
}

void::MainWindow::addContact() 
{
    Ui_Dialog request;
    QDialog dialog(this);
    request.setupUi(&dialog);
    Settings::saveRestore(&dialog);

    request.memorequest->setLenDisplayLabelChatRequest(request.memoSizeChatRequest);

    try
    {   

    bool sapling = true;
    rpc->createNewZaddr(sapling, [=] (json reply) {
        QString myAddr = QString::fromStdString(reply.get<json::array_t>()[0]);
        rpc->refreshAddresses();
        request.myzaddr->setText(myAddr);
        ui->listReceiveAddresses->insertItem(0, myAddr); 
        ui->listReceiveAddresses->setCurrentIndex(0);
        DataStore::getChatDataStore()->setSendZaddr(myAddr);
    });

    }catch(...)
       {

            
            qDebug() << QString("Caught something nasty with myZaddr Contact");
       }

        QString cid = QUuid::createUuid().toString(QUuid::WithoutBraces);
        
    QObject::connect(request.sendRequestButton, &QPushButton::clicked, [&] () {
        
        QString addr = request.zaddr->text();
        QString myAddr = request.myzaddr->text().trimmed();
        QString memo = request.memorequest->toPlainText().trimmed();
        QString avatar = QString(":/icons/res/") + request.comboBoxAvatar->currentText() + QString(".png");
        QString label = request.labelRequest->text().trimmed();


        contactRequest.setSenderAddress(myAddr);
        contactRequest.setReceiverAddress(addr);
        contactRequest.setMemo(memo);
        contactRequest.setCid(cid);
        contactRequest.setAvatar(avatar);
        contactRequest.setLabel(label);

         });


    QObject::connect(request.sendRequestButton, &QPushButton::clicked, this, &MainWindow::saveandsendContact);

    // QObject::connect(request.onlyAdd, &QPushButton::clicked, this, &MainWindow::saveContact);
        
    dialog.exec();
    rpc->refreshContacts(ui->listContactWidget);
}

void MainWindow::saveandsendContact()
{
    this->ContactRequest();
}

// Create a Tx for a contact Request 
Tx MainWindow::createTxForSafeContactRequest() 
{
    Tx tx; 
    {
        CAmount totalAmt;
        QString amtStr = "0";
        CAmount amt;
        QString headerbytes = "";
        amt = CAmount::fromDecimalString("0");
        totalAmt = totalAmt + amt;
   
        QString cid = contactRequest.getCid();
        QString myAddr = DataStore::getChatDataStore()->getSendZaddr();
        QString type = "Cont";
        QString addr = contactRequest.getReceiverAddress();


        QString memo = contactRequest.getMemo();
        QString passphrase = DataStore::getChatDataStore()->getPassword();
        int length = passphrase.length();

////////////////Generate the secretkey for our message encryption
        char *hashEncryptionKeyraw = NULL;
        hashEncryptionKeyraw = new char[length+1];
        strncpy(hashEncryptionKeyraw, passphrase.toUtf8(), length +1);

        #define MESSAGEAS1 ((const unsigned char *) hashEncryptionKeyraw)
        #define MESSAGEAS1_LEN length

         unsigned char sk[crypto_kx_SECRETKEYBYTES];
         unsigned char pk[crypto_kx_PUBLICKEYBYTES];

         if (crypto_kx_seed_keypair(pk, sk, MESSAGEAS1) !=0) {
            this->logger->write("Suspicious client public contact request key, bail out ");
          //   qDebug() << __func__ << ": Suspicious client public send key from crypto_kx_seed_keypair, aborting!";
             return tx;
         }

         QString publicKey = QByteArray(reinterpret_cast<const char*>(pk), crypto_kx_PUBLICKEYBYTES).toHex();
         QString hmemo= createHeaderMemo(type,cid,myAddr,"", publicKey);

        tx.toAddrs.push_back(ToFields{addr, amt, hmemo});
        tx.toAddrs.push_back(ToFields{addr, amt, memo});
        tx.fee = Settings::getMinerFee();
    }

    return tx;
}

void MainWindow::ContactRequest() {

    if (contactRequest.getReceiverAddress().isEmpty() || contactRequest.getMemo().isEmpty()) {
     
        QMessageBox msg(QMessageBox::Critical, tr("You have to select a contact and insert a Memo"),
        tr("You have selected no Contact from Contactlist,\n")  + tr("\nor your Memo is empty"),
        QMessageBox::Ok, this);

        msg.exec();
        return;
    }
    
    QString newLabel = contactRequest.getLabel();

        if (!AddressBook::getInstance()->getAddressForLabel(newLabel).isEmpty()) 
        {
            QMessageBox::critical(
                this, 
                QObject::tr("Label Error"), 
                QObject::tr("The label '%1' already exists. Please remove the existing label.").arg(newLabel), 
                QMessageBox::Ok
            );
            return;
        }

    int max = 512;
    QString chattext = contactRequest.getMemo();;
    int size = chattext.size();

    if (size > max){
     
        QMessageBox msg(QMessageBox::Critical, tr("Your Message is too long"),
        tr("You can only write messages with 512 character maximum \n")  + tr("\n Please reduce your message to 235 character."),
        QMessageBox::Ok, this);

        msg.exec();
        return;
    }

  Tx tx = createTxForSafeContactRequest();

    QString error = doSendRequestTxValidations(tx);

    if (!error.isEmpty()) {
        // Something went wrong, so show an error and exit
        QMessageBox msg(QMessageBox::Critical, tr("Message Error"), error,
                        QMessageBox::Ok, this);

        msg.exec();

        // abort the Tx
        return;
    }

        // Create a new Dialog to show that we are computing/sending the Tx
        auto d = new QDialog(this);
        auto connD = new Ui_ConnectionDialog();
        connD->setupUi(d);
        QMovie *movie1 = new QMovie(":/img/res/silentdragonlite-animated-startup-dark.gif");
        QMovie *movie2 = new QMovie(":/img/res/silentdragonlite-animated-startup-dark.gif");
        auto theme = Settings::getInstance()->get_theme_name();
        if (theme == "Dark" || theme == "Midnight") {
            movie2->setScaledSize(QSize(512,512));
            connD->topIcon->setMovie(movie2);
            movie2->start();
        } else {
            movie1->setScaledSize(QSize(512,512));
            connD->topIcon->setMovie(movie1);
            movie1->start();
        }

        connD->status->setText(tr("Please wait..."));
        connD->statusDetail->setText(tr("Your contact request will be sent"));

        d->show();
        ui->memoTxtChat->clear();

        // And send the Tx
        rpc->executeTransaction(tx, true,
            [=] (QString txid) { 
                ui->statusBar->showMessage(Settings::txidStatusMessage + " " + txid);

                connD->status->setText(tr("Done!"));
                connD->statusDetail->setText(txid);

                QTimer::singleShot(1000, [=]() {
                    d->accept();
                    d->close();
                    delete connD;
                    delete d;
                    
                  });

                  /////Add this contact after we sent the request

        QString addr = contactRequest.getReceiverAddress();
        QString newLabel = contactRequest.getLabel();
        QString myAddr = contactRequest.getSenderAddress();
        QString cid = contactRequest.getCid();
        QString avatar = contactRequest.getAvatar();
        
        if (addr.isEmpty() || newLabel.isEmpty()) 
        {
            QMessageBox::critical(
                this, 
                QObject::tr("Address or Label Error"), 
                QObject::tr("Address or Label cannot be empty"), 
                QMessageBox::Ok
                );
            return;
        }

         if (!AddressBook::getInstance()->getAddressForLabel(newLabel).isEmpty()) 
        {
            QMessageBox::critical(
                this, 
                QObject::tr("Label Error"), 
                QObject::tr("The label '%1' already exists. Please remove the existing label.").arg(newLabel), 
                QMessageBox::Ok
            );
            return;
        }

        // Test if address is valid.
        if (!Settings::isValidAddress(addr)) 
        {
            QMessageBox::critical(
                this, 
                QObject::tr("Address Format Error"), 
                QObject::tr("%1 doesn't seem to be a valid hush address.").arg(addr), 
                QMessageBox::Ok
            );
            return;
        } 

        ////// Success, so show it
        AddressBook::getInstance()->addAddressLabel(newLabel, addr, myAddr, cid, avatar);
        rpc->refreshContacts(
        ui->listContactWidget);
        QMessageBox::information(
            this, 
            QObject::tr("Added Contact"), 
            QObject::tr("successfully added your new contact").arg(newLabel), 
            QMessageBox::Ok
          
        );
        return;
                // Force a UI update so we get the unconfirmed Tx
              //  rpc->refresh(true);
                ui->memoTxtChat->clear();
                rpc->refresh(true);
                rpc->refreshContacts(
                ui->listContactWidget);

            },
            // Errored out
            [=] (QString opid, QString errStr) {
                ui->statusBar->showMessage(QObject::tr(" Tx ") % opid % QObject::tr(" failed"), 15 * 1000);
                
                d->accept();
                d->close();
                delete connD;
                delete d;

                if (!opid.isEmpty())
                    errStr = QObject::tr("The transaction with id ") % opid % QObject::tr(" failed. The error was") + ":\n\n" + errStr;            

                QMessageBox::critical(this, QObject::tr("Transaction Error"), errStr, QMessageBox::Ok);            
            }
        );
      
    }        


QString MainWindow::doSendRequestTxValidations(Tx tx) {
    // Check to see if we have enough verified funds to send the Tx.

    CAmount total;
    for (auto toAddr : tx.toAddrs) {
        if (!Settings::isValidAddress(toAddr.addr)) {
            QString addr = (toAddr.addr.length() > 100 ? toAddr.addr.left(100) + "..." : toAddr.addr);
            return QString(tr("Recipient Address ")) % addr % tr(" is Invalid");
        }

        // This technically shouldn't be possible, but issue #62 seems to have discovered a bug
        // somewhere, so just add a check to make sure. 
        if (toAddr.amount.toqint64() < 0) {
            return QString(tr("Amount for address '%1' is invalid!").arg(toAddr.addr));
        }

        total = total + toAddr.amount;
    }
    total = total + tx.fee;

    auto available = rpc->getModel()->getAvailableBalance();

    if (available < total) {
        return tr("Not enough available funds to send this transaction\n\nHave: %1\nNeed: %2\n\nNote: Funds need 1 confirmations before they can be spent")
            .arg(available.toDecimalhushString(), total.toDecimalhushString());
    }

    return "";
}