/*
INI Processor - a small library which allows you parsing INI-files

Copyright (c) 2015-2018 Vitaly Novichkov <admin@wohlnet.ru>

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation the
rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
sell copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

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.
*/

/*
A QVariant-like thing created just like a proxy between
INI Processor and target value (to be compatible with QSettings)
*/

#ifndef INI_PROCESSING_VARIANT_H
#define INI_PROCESSING_VARIANT_H

#include <string>
#include <cstring>
#include <algorithm>
#include <cctype>
#include <cstdlib>
#ifdef INI_PROCESSING_ALLOW_QT_TYPES
#include <QString>
#endif

class IniProcessingVariant
{
    std::string  m_data;
    std::string *m_dataP;
    inline std::string &data()
    {
        if(m_dataP)
            return *m_dataP;
        else
            return m_data;
    }
public:
    IniProcessingVariant():
        m_data(""),
        m_dataP(nullptr) {}

    IniProcessingVariant(const std::string &data):
        m_data(data),
        m_dataP(nullptr) {}
    IniProcessingVariant(const char *data):
        m_data(data),
        m_dataP(nullptr) {}
    #ifdef INI_PROCESSING_ALLOW_QT_TYPES
    IniProcessingVariant(const QString &data):
        m_data(data.toStdString()),
        m_dataP(nullptr) {}
    #endif
    IniProcessingVariant(std::string *dataPointer):
        m_data(""),
        m_dataP(dataPointer) {}

    IniProcessingVariant(const IniProcessingVariant &v):
        m_data(v.m_data),
        m_dataP(v.m_dataP) {}

    IniProcessingVariant(char data):
        m_data(std::to_string(data)),
        m_dataP(nullptr) {}

    IniProcessingVariant(unsigned char data):
        m_data(std::to_string(data)),
        m_dataP(nullptr) {}

    IniProcessingVariant(bool data):
        m_data(std::to_string(data)),
        m_dataP(nullptr) {}

    IniProcessingVariant(short data):
        m_data(std::to_string(data)),
        m_dataP(nullptr) {}

    IniProcessingVariant(unsigned short data):
        m_data(std::to_string(data)),
        m_dataP(nullptr) {}

    IniProcessingVariant(int data):
        m_data(std::to_string(data)),
        m_dataP(nullptr) {}
    IniProcessingVariant(unsigned int data):
        m_data(std::to_string(data)),
        m_dataP(nullptr) {}

    IniProcessingVariant(long data):
        m_data(std::to_string(data)),
        m_dataP(nullptr) {}
    IniProcessingVariant(unsigned long data):
        m_data(std::to_string(data)),
        m_dataP(nullptr) {}

    IniProcessingVariant(long long data):
        m_data(std::to_string(data)),
        m_dataP(nullptr) {}
    IniProcessingVariant(unsigned long long data):
        m_data(std::to_string(data)),
        m_dataP(nullptr) {}

    IniProcessingVariant(float data):
        m_data(std::to_string(data)),
        m_dataP(nullptr) {}

    IniProcessingVariant(double data):
        m_data(std::to_string(data)),
        m_dataP(nullptr) {}

    IniProcessingVariant(long double data):
        m_data(std::to_string(data)),
        m_dataP(nullptr) {}

    bool isNull()
    {
        return (m_data.empty() && !m_dataP);
    }

    bool isValid()
    {
        return ((!m_data.empty()) || (static_cast<std::string *>(m_dataP)));
    }

    std::string toString()
    {
        std::string out = data();

        if((out.size() > 2) && (out[0] == '"'))
            out.erase(0, 1);

        if((out.size() > 1) && (out[out.size() - 1] == '"'))
            out.erase((out.size() - 1), 1);

        return out;
    }

    #ifdef INI_PROCESSING_ALLOW_QT_TYPES
    QString toQString()
    {
        return QString::fromStdString(toString());
    }
    #endif

    bool toBool()
    {
        size_t i = 0;
        size_t ss = std::min(static_cast<size_t>(4ul), data().size());
        char buff[4] = {0, 0, 0, 0};
        const char *pbufi = data().c_str();
        char *pbuff = buff;

        for(; i < ss; i++)
            (*pbuff++) = static_cast<char>(std::tolower(*pbufi++));

        if(ss < 4)
        {
            if(ss == 0)
                return false;

            if(ss == 1)
                return (buff[0] == '1');

            try
            {
                long num = std::strtol(buff, 0, 0);
                return num != 0l;
            }
            catch(...)
            {
                bool res = (std::memcmp(buff, "yes", 3) == 0) ||
                           (std::memcmp(buff, "on", 2) == 0);
                return res;
            }
        }

        if(std::memcmp(buff, "true", 4) == 0)
            return true;

        try
        {
            long num = std::strtol(buff, 0, 0);
            return num != 0l;
        }
        catch(...)
        {
            return false;
        }
    }

    int toInt()
    {
        return std::atoi(data().c_str());
    }
    unsigned int toUInt()
    {
        return static_cast<unsigned int>(std::strtoul(data().c_str(), nullptr, 0));
    }

    long toLong()
    {
        return std::atol(data().c_str());
    }
    unsigned long toULong()
    {
        return std::strtoul(data().c_str(), nullptr, 0);
    }

    long long toLongLong()
    {
        return std::atoll(data().c_str());
    }
    unsigned long long toULongLong()
    {
        return std::strtoull(data().c_str(), nullptr, 0);
    }

    float toFloat()
    {
        return float(std::atof(data().c_str()));
    }

    double toDouble()
    {
        return std::atof(data().c_str());
    }
};


#endif // INI_PROCESSING_VARIANT_H