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#ifdef _MSC_VER
// disable warning C4786: symbol greater than 255 character,
// nessesary to ignore as <map> causes lots of warning
#pragma warning( disable: 4786 )
#endif

#include "range.hxx"
// Connect range objects to Python

range::range( long start, long stop, long step )
: Py::PythonExtension<range>()
, m_start( start )
, m_stop( stop )
, m_step( step )
{
    std::cout   << "range object created " << this
                << " " << asString() << std::endl;
}

range::~range()
{
    std::cout << "range object destroyed " << this << std::endl;
}

Py_ssize_t range::length() const
{
    return (m_stop - m_start + 1)/m_step;
}

int range::item( long i ) const
{
    if( i >= length() )
        // this exception stops a Python for loop over range.
        throw Py::IndexError("index too large");

    return m_start + i * m_step;
}

range *range::slice( Py_ssize_t i, Py_ssize_t j ) const
{
    long first = m_start + static_cast<long>( i ) * m_step;
    long last = m_start + static_cast<long>( j ) * m_step;
    return new range( first, last, m_step );
}

range *range::extend( Py_ssize_t k ) const
{
    return new range( m_start, m_stop + static_cast<long>( k ), m_step);
}

std::string range::asString() const
{
    std::OSTRSTREAM s;
    s << "range(" << m_start << ", " << m_stop << ", " << m_step << ")";

    return std::string( s.str() );
}

Py::Object range::reference_count( const Py::Tuple &/*args*/ )
{
    return Py::Long( ob_refcnt );
}

Py::Object range::c_value(const Py::Tuple&) const
{
    Py::List result;
    for( int i = m_start; i <= m_stop; i += m_step )
    {
        result.append( Py::Long(i) );
    }

    return result;
}

void range::c_assign( const Py::Tuple &, const Py::Object &rhs )
{
    Py::Tuple w( rhs );
    w.verify_length( 3 );
    m_start = Py::Long( w[0] ).as_long();
    m_stop = Py::Long( w[1] ).as_long();
    m_step = Py::Long( w[2] ).as_long();
}

Py::Object range::repr()
{
    return Py::String( asString() );
}

Py_ssize_t range::sequence_length()
{
    return static_cast<int>( length() );
}

Py::Object range::sequence_item( Py_ssize_t i )
{
    return Py::Long( item( static_cast<int>( i ) ) );
}

Py::Object range::sequence_concat( const Py::Object &j )
{
    Py::Long k( j );
    return Py::asObject( extend( k.as_long() ) );
}

Py::Object range::sequence_slice( Py_ssize_t i, Py_ssize_t j )
{
    return Py::asObject( slice( i, j ) );
}


Py::Object range::getattr( const char *name )
{
    if( std::string( name ) == "c" )
        return Py::Float( 300.0 );

    if( std::string( name ) == "start" )
        return Py::Long( m_start );

    return getattr_methods( name );
}

// "regular" methods...
Py::Object range::amethod( const Py::Tuple &t )
{
    t.verify_length( 1 );
    Py::List result;
    result.append( Py::Object( this ) );
    result.append( t[0] );

    return result;
}

Py::Object range::value( const Py::Tuple &t )
{
    return c_value( t );
}

Py::Object range::assign( const Py::Tuple &t )
{
    t.verify_length( 2 );

    Py::Tuple t1( t[0] ); // subscripts
    Py::Object o2( t[1] ); // rhs;
    c_assign ( t1, o2 );

    return Py::None();
}

void range::init_type()
{
    behaviors().name( "example.range" );
    behaviors().doc( "range objects: start, stop, step" );
    behaviors().supportRepr();
    behaviors().supportGetattr();
    behaviors().supportSequenceType();

    add_varargs_method( "amethod", &range::amethod, "demonstrate how to document amethod" );
    add_varargs_method( "assign", &range::assign );
    add_varargs_method( "value", &range::value );
    add_varargs_method( "reference_count", &range::reference_count );

    behaviors().readyType();
}
