/*****************************************************************************
* gta5sync GRAND THEFT AUTO V SYNC
* Copyright (C) 2016 Syping
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program.  If not, see <http://www.gnu.org/licenses/>.
*****************************************************************************/

#include "SnapmaticPicture.h"
#include <QJsonDocument>
#include <QJsonObject>
#include <QVariantMap>
#include <QJsonArray>
#include <QString>
#include <QImage>
#include <QFile>

SnapmaticPicture::SnapmaticPicture(QString fileName, QObject *parent) : QObject(parent), picFileName(fileName)
{
    // PARSE INT INIT - DO NOT CHANGE THIS VALUES
    snapmaticHeaderLength = 278;
    snapmaticUsefulLength = 260;
    jpegHeaderLineDifStr = 2;
    jpegPreHeaderLength = 14;
    jpegPicStreamLength = 524288;
    jsonStreamLength = 3076;
    tideStreamLength = 260;

    // INIT PIC
    cachePicture = QImage(0, 0, QImage::Format_RGB32);
    pictureStr = "";
    lastStep = "";
    picOk = 0;

    // INIT JSON
    jsonOk = 0;
    jsonStr = "";
    jsonLocX = 0;
    jsonLocY = 0;
    jsonLocZ = 0;
    jsonCrewID = 0;
    jsonPlyrsList = QStringList();
}

bool SnapmaticPicture::readingPicture()
{
    // Start opening file
    // lastStep is like currentStep

    QFile *picFile = new QFile(picFileName);
    if (!picFile->open(QFile::ReadOnly))
    {
        lastStep = "1;/1,OpenFile," + convertDrawStringForLog(picFileName);
        picFile->deleteLater();
        delete picFile;
        return false;
    }

    // Reading Snapmatic Header
    if (!picFile->isReadable())
    {
        lastStep = "2;/3,ReadingFile," + convertDrawStringForLog(picFileName) + ",1,NOHEADER";
        picFile->close();
        picFile->deleteLater();
        delete picFile;
        return false;
    }
    QByteArray snapmaticHeaderLine = picFile->read(snapmaticHeaderLength);
    pictureStr = getSnapmaticPictureString(snapmaticHeaderLine);

    // Reading JPEG Header Line
    if (!picFile->isReadable())
    {
        lastStep = "2;/3,ReadingFile," + convertDrawStringForLog(picFileName) + ",2,NOHEADER";
        picFile->close();
        picFile->deleteLater();
        delete picFile;
        return false;
    }
    QByteArray jpegHeaderLine = picFile->read(jpegPreHeaderLength);

    // Checking for JPEG
    jpegHeaderLine.remove(0, jpegHeaderLineDifStr);
    if (jpegHeaderLine.left(4) != "JPEG")
    {
        lastStep = "2;/3,ReadingFile," + convertDrawStringForLog(picFileName) + ",2,NOJPEG";
        picFile->close();
        picFile->deleteLater();
        delete picFile;
        return false;
    }

    // Read JPEG Stream
    if (!picFile->isReadable())
    {
        lastStep = "2;/3,ReadingFile," + convertDrawStringForLog(picFileName) + ",2,NOPIC";
        picFile->close();
        picFile->deleteLater();
        delete picFile;
        return false;
    }
    QByteArray jpegRawContent = picFile->read(jpegPicStreamLength);
    picOk = cachePicture.loadFromData(jpegRawContent, "JPEG");

    // Read JSON Stream
    if (!picFile->isReadable())
    {
        lastStep = "2;/3,ReadingFile," + convertDrawStringForLog(picFileName) + ",3,NOJSON";
        picFile->close();
        picFile->deleteLater();
        delete picFile;
        return picOk;
    }
    else if (picFile->read(4) != "JSON")
    {
        lastStep = "2;/3,ReadingFile," + convertDrawStringForLog(picFileName) + ",3,CTJSON";
        picFile->close();
        picFile->deleteLater();
        delete picFile;
        return picOk;
    }
    QByteArray jsonRawContent = picFile->read(jsonStreamLength);
    jsonStr = getSnapmaticJSONString(jsonRawContent);
    parseJsonContent(); // JSON parsing is own function

    if (!picFile->isReadable())
    {
        lastStep = "2;/3,ReadingFile," + convertDrawStringForLog(picFileName) + ",4,NOTITL";
        picFile->close();
        picFile->deleteLater();
        delete picFile;
        return picOk;
    }
    else if (picFile->read(4) != "TITL")
    {
        lastStep = "2;/3,ReadingFile," + convertDrawStringForLog(picFileName) + ",4,CTTITL";
        picFile->close();
        picFile->deleteLater();
        delete picFile;
        return picOk;
    }
    QByteArray titlRawContent = picFile->read(tideStreamLength);
    titlStr = getSnapmaticTIDEString(titlRawContent);

    if (!picFile->isReadable())
    {
        lastStep = "2;/3,ReadingFile," + convertDrawStringForLog(picFileName) + ",5,NODESC";
        picFile->close();
        picFile->deleteLater();
        delete picFile;
        return picOk;
    }
    else if (picFile->read(4) != "DESC")
    {
        lastStep = "2;/3,ReadingFile," + convertDrawStringForLog(picFileName) + ",5,CTDESC";
        picFile->close();
        picFile->deleteLater();
        delete picFile;
        return picOk;
    }
    QByteArray descRawContent = picFile->read(tideStreamLength);
    descStr = getSnapmaticTIDEString(descRawContent);

    picFile->close();
    picFile->deleteLater();
    delete picFile;
    return picOk;
}

QString SnapmaticPicture::getSnapmaticPictureString(QByteArray snapmaticHeader)
{
    QByteArray snapmaticUsefulBytes = snapmaticHeader.left(snapmaticUsefulLength);
    snapmaticUsefulBytes.replace((char)0x00, "");
    snapmaticUsefulBytes.replace((char)0x01, "");
    return QString::fromLatin1(snapmaticUsefulBytes);
}

QString SnapmaticPicture::getSnapmaticJSONString(QByteArray jsonBytes)
{
    QByteArray jsonUsefulBytes = jsonBytes;
    jsonUsefulBytes.replace((char)0x00, "");
    jsonUsefulBytes.replace((char)0x0c, "");
    return QString::fromUtf8(jsonUsefulBytes);
}

QString SnapmaticPicture::getSnapmaticTIDEString(QByteArray tideBytes)
{
    QByteArray tideUsefulBytes = tideBytes;
    tideUsefulBytes.remove(0, 4);
    QList<QByteArray> tideUsefulBytesList = tideUsefulBytes.split(char(0x00));
    return QString::fromUtf8(tideUsefulBytesList.at(0));
}

bool SnapmaticPicture::readingPictureFromFile(QString fileName)
{
    if (fileName != "")
    {
        picFileName = fileName;
        return readingPicture();
    }
    else
    {
        return false;
    }
}

void SnapmaticPicture::setPicture(QImage picture)
{
    cachePicture = picture;
}

QString SnapmaticPicture::getPictureDesc()
{
    return descStr;
}

QString SnapmaticPicture::getPictureTitl()
{
    return titlStr;
}

QString SnapmaticPicture::getPictureStr()
{
    return pictureStr;
}

QString SnapmaticPicture::getLastStep()
{
    return lastStep;
}

QImage SnapmaticPicture::getPicture()
{
    return cachePicture;
}

QString SnapmaticPicture::convertDrawStringForLog(QString inputStr)
{
    return inputStr.replace("&","&u;").replace(",","&c;");
}

QString SnapmaticPicture::convertLogStringForDraw(QString inputStr)
{
    return inputStr.replace("&c;",",").replace("&u;","&");
}

bool SnapmaticPicture::isPicOk()
{
    return picOk;
}

// JSON part

void SnapmaticPicture::parseJsonContent()
{
    QJsonDocument jsonDocument = QJsonDocument::fromJson(jsonStr.toLatin1());
    QJsonObject jsonObject = jsonDocument.object();
    QVariantMap jsonMap = jsonObject.toVariantMap();

    if (jsonMap.contains("loc"))
    {
        QJsonObject locObject = jsonObject["loc"].toObject();
        QVariantMap locMap = locObject.toVariantMap();
        if (locMap.contains("x")) { jsonLocX = locMap["x"].toDouble(); }
        if (locMap.contains("y")) { jsonLocY = locMap["y"].toDouble(); }
        if (locMap.contains("z")) { jsonLocZ = locMap["z"].toDouble(); }
    }
    if (jsonMap.contains("crewid"))
    {
        jsonCrewID = jsonMap["crewid"].toInt();
    }
    if (jsonMap.contains("plyrs"))
    {
        jsonPlyrsList = jsonMap["plyrs"].toStringList();
    }

    jsonOk = true;
}

bool SnapmaticPicture::isJsonOk()
{
    return jsonOk;
}

QString SnapmaticPicture::getJsonStr()
{
    return jsonStr;
}

int SnapmaticPicture::getCrewNumber()
{
    return jsonCrewID;
}

double SnapmaticPicture::getLocationX()
{
    return jsonLocX;
}

double SnapmaticPicture::getLocationY()
{
    return jsonLocY;
}

double SnapmaticPicture::getLocationZ()
{
    return jsonLocZ;
}

QStringList SnapmaticPicture::getPlayers()
{
    return jsonPlyrsList;
}