#include "FilePairLineIterator.h"

#include <string>
#include <iosfwd>
#include <sstream>
#include <iostream>
#include <fstream>

FilePairLineIterator::FilePairLineIterator( const char *filepath ) : ifstr( filepath ), lines( ifstr )
{

}

FilePairLineIterator::FilePairLineIterator( const std::string &filepath ) : ifstr( filepath.c_str() ), lines( ifstr )
{

}

FilePairLineIterator::FilePairLineIterator( std::istream &_is ) : lines( _is )
{

}

FilePairLineIterator::~FilePairLineIterator()
{

}

unsigned int
FilePairLineIterator::line()
{
    return lines.line();
}

bool
FilePairLineIterator::eof()
{
    return lines.eof();
}

bool
FilePairLineIterator::nextDataLine( std::string &filename1, std::string &filename2 )
{
    if( lines.eof() )
        return false;

    std::string dataline = lines.nextLine();
    while( !lines.eof()
           && ( (dataline.length() == 0)
               || ( (dataline.length() > 0) && ('#' == dataline.at(0)) ) ) )
    {
        dataline = lines.nextLine();
    }

    if( (dataline.length() > 0) && ('#' != dataline.at(0)) )
    {
        std::istringstream instr( dataline.c_str() );

        // Oakland/Females/US_Oakland_2879899.jpg Charlotte/Females/US_Charlotte_1951756.jpg
        instr >> filename1;
        if( 0 == filename1.length() )
            return false;

        instr >> filename2;
        if( 0 == filename2.length() )
            return false;

        return true;
    }
    else
    {
        return false;
    }
}