// Copyright (c) 2011-2015 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include "transactiondesc.h"

#include "bitcoinunits.h"
#include "guiutil.h"
#include "paymentserver.h"
#include "transactionrecord.h"

#include "base58.h"
#include "consensus/consensus.h"
#include "main.h"
#include "script/script.h"
#include "timedata.h"
#include "util.h"
#include "wallet/db.h"
#include "wallet/wallet.h"

#include <stdint.h>
#include <string>

QString TransactionDesc::FormatTxStatus(const CWalletTx& wtx)
{
    AssertLockHeld(cs_main);
    if (!CheckFinalTx(wtx))
    {
        if (wtx.nLockTime < LOCKTIME_THRESHOLD)
            return tr("Open for %n more block(s)", "", wtx.nLockTime - chainActive.Height());
        else
            return tr("Open until %1").arg(GUIUtil::dateTimeStr(wtx.nLockTime));
    }
    else
    {
        int nDepth = wtx.GetDepthInMainChain();
        if (nDepth < 0)
            return tr("conflicted");
        else if (GetAdjustedTime() - wtx.nTimeReceived > 2 * 60 && wtx.GetRequestCount() == 0)
            return tr("%1/offline").arg(nDepth);
        else if (nDepth < 6)
            return tr("%1/unconfirmed").arg(nDepth);
        else
            return tr("%1 confirmations").arg(nDepth);
    }
}

QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx, TransactionRecord *rec, int unit)
{
    QString strHTML;

    LOCK2(cs_main, wallet->cs_wallet);
    strHTML.reserve(4000);
    strHTML += "<html><font face='verdana, arial, helvetica, sans-serif'>";

    int64_t nTime = wtx.GetTxTime();
    CAmount nCredit = wtx.GetCredit(ISMINE_ALL);
    CAmount nDebit = wtx.GetDebit(ISMINE_ALL);
    CAmount nNet = nCredit - nDebit;

    strHTML += "<b>" + tr("Status") + ":</b> " + FormatTxStatus(wtx);
    int nRequests = wtx.GetRequestCount();
    if (nRequests != -1)
    {
        if (nRequests == 0)
            strHTML += tr(", has not been successfully broadcast yet");
        else if (nRequests > 0)
            strHTML += tr(", broadcast through %n node(s)", "", nRequests);
    }
    strHTML += "<br>";

    strHTML += "<b>" + tr("Date") + ":</b> " + (nTime ? GUIUtil::dateTimeStr(nTime) : "") + "<br>";


    //LONG 
    if (rec->isLongTx && rec->isDataTx) {
        CTxDestination addressTo = CBitcoinAddress(rec->addressTo).Get();
        CTxDestination addressFrom = CBitcoinAddress(rec->addressFrom).Get();
        strHTML += "<b>" + tr("Message") + ":</b> " + GUIUtil::HtmlEscape(rec->dataBodyText) + "<br>";
        strHTML += "<b>" + tr("To") + ":</b> " + GUIUtil::HtmlEscape(rec->addressTo) + " ("+ tr("label") + ": " + GUIUtil::HtmlEscape(wallet->mapAddressBook[addressTo].name) + ", PubKeyHEX: " + GUIUtil::HtmlEscape(rec->pubKeyHexTo) +") <br>";
        strHTML += "<b>" + tr("From") + ":</b> " + GUIUtil::HtmlEscape(rec->addressFrom) + " ("+ tr("label") + ": " + GUIUtil::HtmlEscape(wallet->mapAddressBook[addressFrom].name) + ", PubKeyHEX: " + GUIUtil::HtmlEscape(rec->pubKeyHexFrom) +") <br>";
    } else {

        

        //
        // From
        //
        if (wtx.IsCoinBase()) {
            strHTML += "<b>" + tr("Source") + ":</b> " + tr("Generated") + "<br>";
        } else if (wtx.mapValue.count("from") && !wtx.mapValue["from"].empty()) {
            // Online transaction
            strHTML += "<b>" + tr("From") + ":</b> " + GUIUtil::HtmlEscape(wtx.mapValue["from"]) + "<br>";
        } else {
            // Offline transaction
            if (nNet > 0)
            {
                // Credit
                if (CBitcoinAddress(rec->address).IsValid())
                {
                    CTxDestination address = CBitcoinAddress(rec->address).Get();
                    if (wallet->mapAddressBook.count(address))
                    {
                        strHTML += "<b>" + tr("From") + ":</b> " + tr("unknown") + "<br>";
                        strHTML += "<b>" + tr("To") + ":</b> ";
                        strHTML += GUIUtil::HtmlEscape(rec->address);
                        QString addressOwned = (::IsMine(*wallet, address) == ISMINE_SPENDABLE) ? tr("own address") : tr("watch-only");
                        if (!wallet->mapAddressBook[address].name.empty())
                            strHTML += " (" + addressOwned + ", " + tr("label") + ": " + GUIUtil::HtmlEscape(wallet->mapAddressBook[address].name) + ")";
                        else
                            strHTML += " (" + addressOwned + ")";
                        strHTML += "<br>";
                    }
                }
            }
        }

        //
        // To
        //
        if (wtx.mapValue.count("to") && !wtx.mapValue["to"].empty())
        {
            // Online transaction
            std::string strAddress = wtx.mapValue["to"];
            strHTML += "<b>" + tr("To") + ":</b> ";
            CTxDestination dest = CBitcoinAddress(strAddress).Get();
            if (wallet->mapAddressBook.count(dest) && !wallet->mapAddressBook[dest].name.empty())
                strHTML += GUIUtil::HtmlEscape(wallet->mapAddressBook[dest].name) + " ";
            strHTML += GUIUtil::HtmlEscape(strAddress) + "<br>";
        }

        //
        // Amount
        //
        if (wtx.IsCoinBase() && nCredit == 0)
        {
            //
            // Coinbase
            //
            CAmount nUnmatured = 0;
            BOOST_FOREACH(const CTxOut& txout, wtx.vout)
                nUnmatured += wallet->GetCredit(txout, ISMINE_ALL);
            strHTML += "<b>" + tr("Credit") + ":</b> ";
            if (wtx.IsInMainChain())
                strHTML += BitcoinUnits::formatHtmlWithUnit(unit, nUnmatured)+ " (" + tr("matures in %n more block(s)", "", wtx.GetBlocksToMaturity()) + ")";
            else
                strHTML += "(" + tr("not accepted") + ")";
            strHTML += "<br>";
        }
        else if (nNet > 0)
        {
            //
            // Credit
            //
            strHTML += "<b>" + tr("Credit") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, nNet) + "<br>";
        }
        else
        {
            isminetype fAllFromMe = ISMINE_SPENDABLE;
            BOOST_FOREACH(const CTxIn& txin, wtx.vin)
            {
                isminetype mine = wallet->IsMine(txin);
                if(fAllFromMe > mine) fAllFromMe = mine;
            }

            isminetype fAllToMe = ISMINE_SPENDABLE;
            BOOST_FOREACH(const CTxOut& txout, wtx.vout)
            {
                isminetype mine = wallet->IsMine(txout);
                if(fAllToMe > mine) fAllToMe = mine;
            }

            if (fAllFromMe)
            {
                if(fAllFromMe & ISMINE_WATCH_ONLY)
                    strHTML += "<b>" + tr("From") + ":</b> " + tr("watch-only") + "<br>";

                //
                // Debit
                //
                BOOST_FOREACH(const CTxOut& txout, wtx.vout)
                {
                    // Ignore change
                    isminetype toSelf = wallet->IsMine(txout);
                    if ((toSelf == ISMINE_SPENDABLE) && (fAllFromMe == ISMINE_SPENDABLE))
                        continue;

                    if (!wtx.mapValue.count("to") || wtx.mapValue["to"].empty())
                    {
                        // Offline transaction
                        CTxDestination address;
                        if (ExtractDestination(txout.scriptPubKey, address))
                        {
                            strHTML += "<b>" + tr("To") + ":</b> ";
                            if (wallet->mapAddressBook.count(address) && !wallet->mapAddressBook[address].name.empty())
                                strHTML += GUIUtil::HtmlEscape(wallet->mapAddressBook[address].name) + " ";
                            strHTML += GUIUtil::HtmlEscape(CBitcoinAddress(address).ToString());
                            if(toSelf == ISMINE_SPENDABLE)
                                strHTML += " (own address)";
                            else if(toSelf & ISMINE_WATCH_ONLY)
                                strHTML += " (watch-only)";
                            strHTML += "<br>";
                        }
                    }

                    strHTML += "<b>" + tr("Debit") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, -txout.nValue) + "<br>";
                    if(toSelf)
                        strHTML += "<b>" + tr("Credit") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, txout.nValue) + "<br>";
                }

                if (fAllToMe)
                {
                    // Payment to self
                    CAmount nChange = wtx.GetChange();
                    CAmount nValue = nCredit - nChange;
                    strHTML += "<b>" + tr("Total debit") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, -nValue) + "<br>";
                    strHTML += "<b>" + tr("Total credit") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, nValue) + "<br>";
                }

                CAmount nTxFee = nDebit - wtx.GetValueOut();
                if (nTxFee > 0)
                    strHTML += "<b>" + tr("Transaction fee") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, -nTxFee) + "<br>";
            }
            else
            {
                //
                // Mixed debit transaction
                //
                BOOST_FOREACH(const CTxIn& txin, wtx.vin)
                    if (wallet->IsMine(txin))
                        strHTML += "<b>" + tr("Debit") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, -wallet->GetDebit(txin, ISMINE_ALL)) + "<br>";
                BOOST_FOREACH(const CTxOut& txout, wtx.vout)
                    if (wallet->IsMine(txout))
                        strHTML += "<b>" + tr("Credit") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, wallet->GetCredit(txout, ISMINE_ALL)) + "<br>";
            }
        }

        strHTML += "<b>" + tr("Net amount") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, nNet, true) + "<br>";

        //
        // Message
        //
        if (wtx.mapValue.count("message") && !wtx.mapValue["message"].empty())
            strHTML += "<br><b>" + tr("Message") + ":</b><br>" + GUIUtil::HtmlEscape(wtx.mapValue["message"], true) + "<br>";
        if (wtx.mapValue.count("comment") && !wtx.mapValue["comment"].empty())
            strHTML += "<br><b>" + tr("Comment") + ":</b><br>" + GUIUtil::HtmlEscape(wtx.mapValue["comment"], true) + "<br>";

        strHTML += "<b>" + tr("Transaction ID") + ":</b> " + TransactionRecord::formatSubTxId(wtx.GetHash(), rec->idx) + "<br>";

        // Message from normal bitcoin:URI (bitcoin:123...?message=example)
        Q_FOREACH (const PAIRTYPE(std::string, std::string)& r, wtx.vOrderForm)
            if (r.first == "Message")
                strHTML += "<br><b>" + tr("Message") + ":</b><br>" + GUIUtil::HtmlEscape(r.second, true) + "<br>";

        //
        // PaymentRequest info:
        //
        Q_FOREACH (const PAIRTYPE(std::string, std::string)& r, wtx.vOrderForm)
        {
            if (r.first == "PaymentRequest")
            {
                PaymentRequestPlus req;
                req.parse(QByteArray::fromRawData(r.second.data(), r.second.size()));
                QString merchant;
                if (req.getMerchant(PaymentServer::getCertStore(), merchant))
                    strHTML += "<b>" + tr("Merchant") + ":</b> " + GUIUtil::HtmlEscape(merchant) + "<br>";
            }
        }

        if (wtx.IsCoinBase())
        {
            quint32 numBlocksToMaturity = COINBASE_MATURITY +  1;
            strHTML += "<br>" + tr("Generated coins must mature %1 blocks before they can be spent. When you generated this block, it was broadcast to the network to be added to the block chain. If it fails to get into the chain, its state will change to \"not accepted\" and it won't be spendable. This may occasionally happen if another node generates a block within a few seconds of yours.").arg(QString::number(numBlocksToMaturity)) + "<br>";
        }

    }//end if !LONG

    //
    // Debug view
    //
    if (fDebug)
    {
        strHTML += "<hr><br>" + tr("Debug information") + "<br><br>";
        BOOST_FOREACH(const CTxIn& txin, wtx.vin)
            if(wallet->IsMine(txin))
                strHTML += "<b>" + tr("Debit") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, -wallet->GetDebit(txin, ISMINE_ALL)) + "<br>";
        BOOST_FOREACH(const CTxOut& txout, wtx.vout)
            if(wallet->IsMine(txout))
                strHTML += "<b>" + tr("Credit") + ":</b> " + BitcoinUnits::formatHtmlWithUnit(unit, wallet->GetCredit(txout, ISMINE_ALL)) + "<br>";

        strHTML += "<br><b>" + tr("Transaction") + ":</b><br>";
        strHTML += GUIUtil::HtmlEscape(wtx.ToString(), true);

        strHTML += "<br><b>" + tr("Inputs") + ":</b>";
        strHTML += "<ul>";

        BOOST_FOREACH(const CTxIn& txin, wtx.vin)
        {
            COutPoint prevout = txin.prevout;

            CCoins prev;
            if(pcoinsTip->GetCoins(prevout.hash, prev))
            {
                if (prevout.n < prev.vout.size())
                {
                    strHTML += "<li>";
                    const CTxOut &vout = prev.vout[prevout.n];
                    CTxDestination address;
                    if (ExtractDestination(vout.scriptPubKey, address))
                    {
                        if (wallet->mapAddressBook.count(address) && !wallet->mapAddressBook[address].name.empty())
                            strHTML += GUIUtil::HtmlEscape(wallet->mapAddressBook[address].name) + " ";
                        strHTML += QString::fromStdString(CBitcoinAddress(address).ToString());
                    }
                    strHTML = strHTML + " " + tr("Amount") + "=" + BitcoinUnits::formatHtmlWithUnit(unit, vout.nValue);
                    strHTML = strHTML + " IsMine=" + (wallet->IsMine(vout) & ISMINE_SPENDABLE ? tr("true") : tr("false")) + "</li>";
                    strHTML = strHTML + " IsWatchOnly=" + (wallet->IsMine(vout) & ISMINE_WATCH_ONLY ? tr("true") : tr("false")) + "</li>";
                }
            }
        }

        strHTML += "</ul>";
    }

    strHTML += "</font></html>";
    return strHTML;
}
