#include "options.h"

#include "config.h"

#include "unitnumber.h"
#include "unitparser.h"
#include "number.h"
#include "lexer.h"
#include "parser.h"

#include <bu/streamstack.h>
#include <bu/sio.h>
#include <stdlib.h>

Options::Options( int argc, char *argv[] ) :
    iScale( 0 ),
    iRadix( 10 )
{
    addOption( iRadix, 'r', "radix",
        Bu::String("Set the radix (default: %1)").arg( iRadix ) );
    addOption( iScale, 's', "scale",
        Bu::String("Set the scale (default: %1)").arg( iScale ) );
    addOption( Bu::slot(this, &Options::selfTest), "self-test",
        "Run a series of tests to ensure everything is working correctly.");
    addOption( Bu::slot(this, &Options::textPrimes), "text-primes",
        "Generate primes in base 36 that only have digits > 9 in them. "
        "Yes, this is entirely silly and purely for entertainment.");
    addOption( Bu::slot(this, &Options::isPrime), 'p', "is-prime",
        "Tests every parameter after to see if it is prime then prints out "
        "the ones that are prime.  Set radix first.");
    addOption( Bu::slot(this, &Options::convert), 'c', "convert",
        "Convert the provided number to the given radix in the format "
        "number:to-radix or from-radix:number:to-radix.  The radix should "
        "be provided in base-10");
    addOption( Bu::slot(this, &Options::execute), 'e', "execute",
        "Execute the next parameters as an equation and print the result. "
        "If you want a different scale or radix then set them first. This will "
        "use all remaining parameters as the equation (you may wish to quote "
        "your equation to prevent special characters from being interpreted by "
        "your shell).");
    addOption( Bu::slot(this, &Options::sum), "sum",
        "Read numbers from standard input and sum them, output the result.");
    addOption( Bu::slot(this, &Options::grind), 'g', "grind",
        "Search for magic numbers.  Secret magic numbers.");
    addOption( Bu::slot(this, &Options::version), 'v', "version",
        "Show the version string ('" CLIC_VERSION_STR "')");
    addHelpOption('h', "help", "This help");

    parse( argc, argv );
}

Options::~Options()
{
}

int Options::selfTest( Bu::StringArray )
{
    UnitNumber().run();
    UnitParser().run();

    exit( 0 );
    return 0;
}

bool hasDigits( const Bu::String &s )
{
    for( Bu::String::const_iterator i = s.begin(); i; i++ )
    {
        if( *i >= '0' && *i <= '9' )
            return true;
    }
    return false;
}

int Options::textPrimes( Bu::StringArray aArgs )
{
    Number tst( 0, 36 );
    Number max( 0, 36 );
    Number j( 0, 36 );
    Number one( 0, 36 );
    Number fact( 0, 36 );
    one = "1";
    fact = "2";
    if( aArgs.getSize() >= 2 )
        tst = aArgs[1];
    else
        tst = "1";

    for(;; tst = tst + one )
    {
        if( hasDigits( tst.toString() ) )
            continue;

        max = tst / fact;
        bool bPrime = true;
        for( j = "2"; j < max; j = j + one )
        {
            if( (tst%j).isZero() )
            {
                bPrime = false;
                break;
            }
        }

        if( bPrime )
        {
            Bu::println("%1").arg( tst );
        }
    }
    
    exit( 0 );
    return 0;
}

int Options::isPrime( Bu::StringArray aArgs )
{
    Number tst( 0, iRadix );
    Number max( 0, iRadix );
    Number j( 0, iRadix );
    Number one( 0, iRadix );
    Number fact( 0, iRadix );
    one = "1";
    fact = "2";

    for( Bu::StringArray::iterator i = aArgs.begin()+1; i; i++ )
    {
        tst = *i;
        max = tst / fact;
        bool bPrime = true;
        for( j = "2"; j < max; j = j + one )
        {
            if( (tst%j).isZero() )
            {
                bPrime = false;
                break;
            }
        }

        if( bPrime )
        {
            Bu::println("%1").arg( tst );
        }
    }

    exit( 0 );
    return aArgs.getSize();
}

int Options::convert( Bu::StringArray aArgs )
{
    for( Bu::StringArray::iterator i = aArgs.begin()+1; i; i++ )
    {
        Bu::StringList lBits = (*i).split(':');
        if( lBits.getSize() < 2 || lBits.getSize() > 3 )
            throw Bu::ExceptionBase("Invalid format");
        
        int iFromRadix = iRadix;
        int iToRadix;
        Number n;
        if( lBits.getSize() == 2 )
        {
            iToRadix = strtol( lBits.last().getStr(), 0, 10 );
            n = Number( lBits.first(), 0, iFromRadix );
        }
        else if( lBits.getSize() == 3 )
        {
            iFromRadix = strtol( lBits.first().getStr(), 0, 10 );
            iToRadix = strtol( lBits.last().getStr(), 0, 10 );
            n = Number( *(lBits.begin()+1), 0, iFromRadix );
        }
        Bu::println("%1").arg( n.toString() );
        Bu::println("%1").arg( n.toRadix( iToRadix ).toString() );
    }

    exit( 0 );
    return 0;
}

int Options::execute( Bu::StringArray aArgs )
{
    if( aArgs.getSize() == 1 )
    {
        Bu::println("Must provide an equation to execute.");
        exit( 0 );
        return 0;
    }
    Bu::MemBuf mbIn(aArgs[1]);
    mbIn.setPos( mbIn.getSize() );
    for( int j = 2; j < aArgs.getSize(); j++ )
    {
        mbIn.write(" ");
        mbIn.write( aArgs[j] );
    }
//    Bu::println("eq: '''%1'''").arg( mbIn.getString() );
    mbIn.setPos( 0 );
    Bu::MemBuf mbOut;
    Lexer lex( mbIn );
    lex.setScale( iScale );
    lex.setRadix( iRadix );
    Parser parser( lex, mbOut );
    parser.parse();
    Bu::print( mbOut.getString() );
    exit( 0 );
    return aArgs.getSize();
}

int Options::sum( Bu::StringArray aArgs )
{
    Number sum( iScale, iRadix );
    while( !Bu::sioRaw.isEos() )
    {
        Bu::String s = Bu::sioRaw.readLine();
        if( s.isEmpty() )
            break;
        Number n( s, iScale, iRadix );
        sum = sum + n;
    }
    Bu::println("%1").arg( sum );
    exit( 0 );
    return 0;
}

int Options::version( Bu::StringArray aArgs )
{
    Bu::println( CLIC_VERSION_STR );
    exit( 0 );
    return 0;
}

bool onlyNines( const Bu::String &s )
{
    for( Bu::String::const_iterator i = s.begin(); i; i++ )
    {
        if( *i != '9' )
            return false;
    }
    return true;
}

bool onlyOnes( const Bu::String &s )
{
    for( Bu::String::const_iterator i = s.begin(); i; i++ )
    {
        if( *i != '1' )
            return false;
    }
    return true;
}

int Options::grind( Bu::StringArray aArgs )
{
    Number test("1");
    Number bit("1");
    Number mult("2");
    int64_t iBits = 1;
    int iLastSize = 0;

    if( aArgs.getSize() > 1 )
    {
        Bu::print("Loading number..."); Bu::sioRaw.flush();
        Bu::String num = Bu::File(aArgs[1], Bu::File::Read).readAll();
        test = num;
        Bu::println("done.");
        Bu::print("Computing bit..."); Bu::sioRaw.flush();
        bit = test;
        bit = bit+Number("1");
        bit = bit/mult;
        Bu::println("done.");
        if( aArgs.getSize() > 2 )
        {
            Bu::print("Trusting a human for where we are..."); Bu::sioRaw.flush();
            iBits = strtoll( aArgs[2].getStr(), NULL, 10 );
        }
        else
        {
            Bu::print("Figuring out where we are..."); Bu::sioRaw.flush();
            Bu::String sBin = bit.toRadix(2).toString();
            iBits = sBin.getSize();
        }
//        Bu::println("Done.  Checking.");
//        Bu::println("test = %1, bit = %2").arg( test ).arg( bit );
//        Bu::String sTest = test.toRadix(2).toString();
//        Bu::File("check-bit.txt", Bu::File::WriteNew ).write( sBin );
//        Bu::File("check-test.txt", Bu::File::WriteNew ).write( sTest );
        iLastSize = num.getSize();
//        Bu::println("File written. %1 bits").arg( sBin.getSize() );
        Bu::println("done.");
        Bu::println("Continuing calculation...");
    }

    for(;;)
    {
        bit = bit*mult;
        test = test + bit;
        Bu::String r = test.toString();
        iBits++;

        if( onlyNines(r) )
        {
            Bu::println("%1 digits").arg( r.getSize() );
            Bu::File f("answer-dec.txt", Bu::File::WriteNew );
            f.write( r );
            Bu::println("Success.");
//            Bu::println("%1 == %2").arg( test.toRadix(2) ).arg( r );
            return 0;
        }
        if( r.getSize() != iLastSize && r.getSize()%1000 == 0 )
        {
            /*
            Bu::String rs = test.toRadix(2).toString();
            int iOBits = rs.getSize();
            if( iOBits != iBits )
                Bu::println("Bit mismatch: %1 vs %2").arg( iOBits ).arg( iBits );
            if( !onlyOnes( rs ) )
                Bu::println("Not only ones!");
                */
            iLastSize = r.getSize();
            Bu::println("%1 digits").arg( r.getSize() );
            Bu::File f(Bu::String("interum-%1-%2.txt").arg( r.getSize() ).arg( iBits ), Bu::File::WriteNew );
            f.write( r );
        }
    }
    Bu::println("Failure.");
    exit( 0 );
    return 0;    
}