/*
  configuration.cpp - wraps gpgme configuration components
  Copyright (C) 2010 Klarälvdalens Datakonsult AB

  This file is part of GPGME++.

  GPGME++ is free software; you can redistribute it and/or
  modify it under the terms of the GNU Library General Public
  License as published by the Free Software Foundation; either
  version 2 of the License, or (at your option) any later version.

  GPGME++ 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 Library General Public License for more details.

  You should have received a copy of the GNU Library General Public License
  along with GPGME++; see the file COPYING.LIB.  If not, write to the
  Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  Boston, MA 02110-1301, USA.
*/

#include <config-gpgme++.h>

#include "configuration.h"
#include "error.h"
#include "util.h"

#include <gpgme.h>

#include <boost/foreach.hpp>

#include <iterator>
#include <algorithm>
#include <ostream>
#include <cstring>

using namespace GpgME;
using namespace GpgME::Configuration;

typedef boost::shared_ptr< boost::remove_pointer<gpgme_conf_opt_t>::type > shared_gpgme_conf_opt_t;
typedef boost::weak_ptr< boost::remove_pointer<gpgme_conf_opt_t>::type > weak_gpgme_conf_opt_t;

typedef boost::shared_ptr< boost::remove_pointer<gpgme_conf_arg_t>::type > shared_gpgme_conf_arg_t;
typedef boost::weak_ptr< boost::remove_pointer<gpgme_conf_arg_t>::type > weak_gpgme_conf_arg_t;

typedef boost::shared_ptr< boost::remove_pointer<gpgme_ctx_t>::type > shared_gpgme_ctx_t;
typedef boost::weak_ptr< boost::remove_pointer<gpgme_ctx_t>::type > weak_gpgme_ctx_t;

namespace {
    struct nodelete { template <typename T> void operator()( T * ) {} };
}

// static
std::vector<Component> Component::load( Error & returnedError ) {

#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    //
    // 1. get a context:
    //
    gpgme_ctx_t ctx_native = 0;
    if ( const gpgme_error_t err = gpgme_new( &ctx_native ) ) {
        returnedError = Error( err );
        return std::vector<Component>();
    }
    const shared_gpgme_ctx_t ctx( ctx_native, &gpgme_release );

    //
    // 2. load the config:
    //
    gpgme_conf_comp_t conf_list_native = 0;
    if ( const gpgme_error_t err = gpgme_op_conf_load( ctx_native, &conf_list_native ) ) {
        returnedError = Error( err );
        return std::vector<Component>();
    }
    shared_gpgme_conf_comp_t head( conf_list_native, &gpgme_conf_release );

    //
    // 3. convert to vector<Component>:
    //
    std::vector<Component> result;

    while ( head ) {
        // secure 'head->next' (if any) against memleaks:
        shared_gpgme_conf_comp_t next;
        if ( head->next ) {
            next.reset( head->next, &gpgme_conf_release );
        }

        // now prevent double-free of next.get() and following:
        head->next = 0;

        // now add a new Component to 'result' (may throw):
        result.resize( result.size() + 1 );
        result.back().comp.swap( head ); // .comp = std::move( head );
        head.swap( next );               //  head = std::move( next );
    }

    return result;
#else
    returnedError = Error( make_error( GPG_ERR_NOT_SUPPORTED ) );
    return std::vector<Component>();
#endif
}

Error Component::save() const {

#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() ) {
        return Error( make_error( GPG_ERR_INV_ARG ) );
    }

    //
    // 1. get a context:
    //
    gpgme_ctx_t ctx_native = 0;
    if ( const gpgme_error_t err = gpgme_new( &ctx_native ) ) {
        return Error( err );
    }
    const shared_gpgme_ctx_t ctx( ctx_native, &gpgme_release );

    //
    // 2. save the config:
    //
    return Error( gpgme_op_conf_save( ctx.get(), comp.get() ) );
#else
    return Error( make_error( GPG_ERR_NOT_SUPPORTED ) );
#endif
}

const char * Component::name() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    return comp ? comp->name : 0 ;
#else
    return 0;
#endif
}

const char * Component::description() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    return comp ? comp->description : 0 ;
#else
    return 0;
#endif
}

const char * Component::programName() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    return comp ? comp->program_name : 0 ;
#else
    return 0;
#endif
}

Option Component::option( unsigned int idx ) const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    gpgme_conf_opt_t opt = 0;
    if ( comp ) {
        opt = comp->options;
    }
    while ( opt && idx ) {
        opt = opt->next;
        --idx;
    }
    if ( opt ) {
        return Option( comp, opt );
    } else {
#endif
        return Option();
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    }
#endif
}

Option Component::option( const char * name ) const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    gpgme_conf_opt_t opt = 0;
    if ( comp ) {
        opt = comp->options;
    }
    using namespace std; // for strcmp
    while ( opt && strcmp( name, opt->name ) != 0 ) {
        opt = opt->next;
    }
    if ( opt ) {
        return Option( comp, opt );
    } else {
#endif
        return Option();
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    }
#endif
}

unsigned int Component::numOptions() const {
    unsigned int result = 0;
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    for ( gpgme_conf_opt_t opt = comp ? comp->options : 0 ; opt ; opt = opt->next ) {
        ++result;
    }
#endif
    return result;
}

std::vector<Option> Component::options() const {
    std::vector<Option> result;
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    for ( gpgme_conf_opt_t opt = comp ? comp->options : 0 ; opt ; opt = opt->next ) {
        result.push_back( Option( comp, opt ) );
    }
#endif
    return result;
}

#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
static gpgme_conf_arg_t mygpgme_conf_arg_copy( gpgme_conf_arg_t other, gpgme_conf_type_t type ) {
    gpgme_conf_arg_t result = 0, last = 0;
    for ( gpgme_conf_arg_t a = other ; a ; a = a->next ) {
        gpgme_conf_arg_t arg = 0;
        const gpgme_error_t err
            = gpgme_conf_arg_new( &arg, type,
                                  a->no_arg                 ? 0 :
                                  type == GPGME_CONF_STRING ? a->value.string :
                                  /* else */                  static_cast<void*>(&a->value) );
        if ( err ) {
            gpgme_conf_arg_release( result, type );
            return 0;
        }
        assert( arg );
        if ( result ) {
            last->next = arg;
        } else {
            result = arg;
        }
        last = arg;
    }
    return result;
}
#endif

Component Option::parent() const {
    return Component( comp.lock() );
}

unsigned int Option::flags() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    return isNull() ? 0 : opt->flags;
#else
    return 0;
#endif
}

Level Option::level() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    return isNull() ? Internal : static_cast<Level>( opt->level ) ;
#else
    return Internal;
#endif
}

const char * Option::name() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    return isNull() ? 0 : opt->name ;
#else
    return 0;
#endif
}

const char * Option::description() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    return isNull() ? 0 : opt->description ;
#else
    return 0;
#endif
}

const char * Option::argumentName() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    return isNull() ? 0 : opt->argname ;
#else
    return 0;
#endif
}

Type Option::type() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    return isNull() ? NoType : static_cast<Type>( opt->type ) ;
#else
    return NoType;
#endif
}

Type Option::alternateType() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    return isNull() ? NoType : static_cast<Type>( opt->alt_type ) ;
#else
    return NoType;
#endif
}

#if 0
static Option::Variant argument_to_variant( gpgme_conf_type_t type, bool list, gpgme_conf_arg_t arg ) {
    assert( arg );
    switch ( type ) {
    case GPGME_CONF_NONE:
        if ( list ) {
            // return the count (number of times set):
            return arg->value.count;
        } else {
            return none;
        }
    case GPGME_CONF_INT32:
        if ( list ) {
            std::vector<int> result;
            for ( gpgme_conf_arg_t a = arg ; a ; a = a->next ) {
                result.push_back( a->value.int32 );
            }
            return result;
        } else {
            return arg->value.int32;
        }
    case GPGME_CONF_UINT32:
        if ( list ) {
            std::vector<unsigned int> result;
            for ( gpgme_conf_arg_t a = arg ; a ; a = a->next ) {
                result.push_back( a->value.uint32 );
            }
            return result;
        } else {
            return arg->value.uint32;
        }
    case GPGME_CONF_FILENAME:
    case GPGME_CONF_LDAP_SERVER:
    case GPGME_CONF_KEY_FPR:
    case GPGME_CONF_PUB_KEY:
    case GPGME_CONF_SEC_KEY:
    case GPGME_CONF_ALIAS_LIST:
        // these should not happen in alt_type, but fall through
    case GPGME_CONF_STRING:
        if ( list ) {
            std::vector<const char*> result;
            for ( gpgme_conf_arg_t a = arg ; a ; a = a->next ) {
                result.push_back( a->value.string );
            }
            return result;
        } else {
            return arg->value.string;
        }
    }
    assert( !"Option: unknown alt_type!" );
    return Option::Variant();
}


namespace {
    inline const void * to_void_star( const char * s ) { return s; }
    inline const void * to_void_star( const std::string & s ) { return s.c_str(); }
    inline const void * to_void_star( const int & i ) { return &i; } // const-&: sic!
    inline const void * to_void_star( const unsigned int & i ) { return &i; } // const-&: sic!

    struct VariantToArgumentVisitor : boost::static_visitor<gpgme_conf_arg_t> {
        static gpgme_conf_arg_t make_argument( gpgme_conf_type_t type, const void * value ) {
            gpgme_conf_arg_t arg = 0;
#ifdef HAVE_GPGME_CONF_ARG_NEW_WITH_CONST_VALUE
            if ( const gpgme_error_t err = gpgme_conf_arg_new( &arg, type, value ) ) {
                return 0;
            }
#else
            if ( const gpgme_error_t err = gpgme_conf_arg_new( &arg, type, const_cast<void*>( value ) ) ) {
                return 0;
            }
#endif
            else {
                return arg;
            }
        }

        gpgme_conf_arg_t operator()( bool v ) const {
            return v ? make_argument( 0 ) : 0 ;
        }

        gpgme_conf_arg_t operator()( const char * s ) const {
            return make_argument( s ? s : "" );
        }

        gpgme_conf_arg_t operator()( const std::string & s ) const {
            return operator()( s.c_str() );
        }

        gpgme_conf_arg_t operator()( int i ) const {
            return make_argument( &i );
        }

        gpgme_conf_arg_t operator()( unsigned int i ) const {
            return make_argument( &i );
        }

        template <typename T>
        gpgme_conf_arg_t operator()( const std::vector<T> & value ) const {
            gpgme_conf_arg_t result = 0;
            gpgme_conf_arg_t last = 0;
            for ( typename std::vector<T>::const_iterator it = value.begin(), end = value.end() ; it != end ; ++it ) {
                if ( gpgme_conf_arg_t arg = make_argument( to_void_star( *it ) ) ) {
                    if ( last ) {
                        last = last->next = arg;
                    } else {
                        result = last = arg;
                    }
                }
            }
            return result;
        }

    };
}

static gpgme_conf_arg_t variant_to_argument( const Option::Variant & value ) {
    VariantToArgumentVisitor v;
    return apply_visitor( v, value );
}

optional<Option::Variant> Option::defaultValue() const {
    if ( isNull() ) {
        return optional<Variant>();
    } else {
        return argument_to_variant( opt->alt_type, opt->flags & GPGME_CONF_LIST, opt->default_value );
    }
}
#endif

Argument Option::defaultValue() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() ) {
        return Argument();
    } else {
        return Argument( comp.lock(), opt, opt->default_value, false );
    }
#else
    return Argument();
#endif
}

const char * Option::defaultDescription() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    return isNull() ? 0 : opt->default_description ;
#else
    return 0;
#endif
}

Argument Option::noArgumentValue() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() ) {
        return Argument();
    } else {
        return Argument( comp.lock(), opt, opt->no_arg_value, false );
    }
#else
    return Argument();
#endif
}

const char * Option::noArgumentDescription() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    return isNull() ? 0 : opt->no_arg_description ;
#else
    return 0;
#endif
}

Argument Option::activeValue() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() ) {
        return Argument();
    } else {
        return Argument( comp.lock(), opt, opt->value, false );
    }
#else
    return Argument();
#endif
}

Argument Option::currentValue() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() ) {
        return Argument();
    }
    const gpgme_conf_arg_t arg =
        opt->change_value ? opt->new_value ? opt->new_value : opt->default_value :
        opt->value        ? opt->value :
        /* else */          opt->default_value ;
    return Argument( comp.lock(), opt, arg, false );
#else
    return Argument();
#endif
}

Argument Option::newValue() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() ) {
        return Argument();
    } else {
        return Argument( comp.lock(), opt, opt->new_value, false );
    }
#else
    return Argument();
#endif
}

bool Option::set() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() ) {
        return false;
    } else if ( opt->change_value ) {
        return opt->new_value;
    } else {
        return opt->value;
    }
#else
    return false;
#endif
}

bool Option::dirty() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    return !isNull() && opt->change_value ;
#else
    return false;
#endif
}

Error Option::setNewValue( const Argument & argument ) {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() ) {
        return Error( make_error( GPG_ERR_INV_ARG ) );
    } else if ( argument.isNull() ) {
        return resetToDefaultValue();
    } else if ( const gpgme_conf_arg_t arg = mygpgme_conf_arg_copy( argument.arg, opt->alt_type ) ) {
        return Error( gpgme_conf_opt_change( opt, 0, arg ) );
    } else {
        return Error( make_error( GPG_ERR_ENOMEM ) );
    }
#else
    return Error( make_error( GPG_ERR_NOT_SUPPORTED ) );
#endif
}

Error Option::resetToActiveValue() {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() ) {
        return Error( make_error( GPG_ERR_INV_ARG ) );
    } else {
        return Error( gpgme_conf_opt_change( opt, 1, 0 ) );
    }
#else
    return Error( make_error( GPG_ERR_NOT_SUPPORTED ) );
#endif
}

Error Option::resetToDefaultValue() {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() ) {
        return Error( make_error( GPG_ERR_INV_ARG ) );
    } else {
        return Error( gpgme_conf_opt_change( opt, 0, 0 ) );
    }
#else
    return Error( make_error( GPG_ERR_NOT_SUPPORTED ) );
#endif
}

#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
static gpgme_conf_arg_t make_argument( gpgme_conf_type_t type, const void * value ) {
    gpgme_conf_arg_t arg = 0;
#ifdef HAVE_GPGME_CONF_ARG_NEW_WITH_CONST_VALUE
    if ( const gpgme_error_t err = gpgme_conf_arg_new( &arg, type, value ) ) {
        return 0;
    }
#else
    if ( const gpgme_error_t err = gpgme_conf_arg_new( &arg, type, const_cast<void*>( value ) ) ) {
        return 0;
    }
#endif
    else {
        return arg;
    }
}
#endif

Argument Option::createNoneArgument( bool set ) const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() || alternateType() != NoType ) {
        return Argument();
    } else {
        if ( set ) {
            return createNoneListArgument( 1 );
        } else {
#endif
            return Argument();
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
        }
    }
#endif
}

Argument Option::createStringArgument( const char * value ) const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() || alternateType() != StringType ) {
        return Argument();
    } else {
        return Argument( comp.lock(), opt, make_argument( GPGME_CONF_STRING, value ), true );
    }
#else
    return Argument();
#endif
}

Argument Option::createStringArgument( const std::string & value ) const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() || alternateType() != StringType ) {
        return Argument();
    } else {
        return Argument( comp.lock(), opt, make_argument( GPGME_CONF_STRING, value.c_str() ), true );
    }
#else
    return Argument();
#endif
}

Argument Option::createIntArgument( int value ) const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() || alternateType() != IntegerType ) {
        return Argument();
    } else {
        return Argument( comp.lock(), opt, make_argument( GPGME_CONF_INT32, &value ), true );
    }
#else
    return Argument();
#endif
}

Argument Option::createUIntArgument( unsigned int value ) const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() || alternateType() != UnsignedIntegerType ) {
        return Argument();
    } else {
        return Argument( comp.lock(), opt, make_argument( GPGME_CONF_UINT32, &value ), true );
    }
#else
    return Argument();
#endif
}

#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
namespace {
    const void * to_void_star( const char * s ) { return s; }
    const void * to_void_star( const std::string & s ) { return s.c_str(); }
    const void * to_void_star( const int & i ) { return &i; } // const-&: sic!
    const void * to_void_star( const unsigned int & i ) { return &i; } // const-&: sic!

    template <typename T>
    gpgme_conf_arg_t make_argument( gpgme_conf_type_t type, const std::vector<T> & value ) {
        gpgme_conf_arg_t result = 0;
        gpgme_conf_arg_t last = 0;
        for ( typename std::vector<T>::const_iterator it = value.begin(), end = value.end() ; it != end ; ++it ) {
            if ( gpgme_conf_arg_t arg = make_argument( type, to_void_star( *it ) ) ) {
                if ( last ) {
                    last = last->next = arg;
                } else {
                    result = last = arg;
                }
            }
        }
        return result;
    }
}
#endif

Argument Option::createNoneListArgument( unsigned int value ) const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( value ) {
        return Argument( comp.lock(), opt, make_argument( GPGME_CONF_NONE, &value ), true );
    } else {
#endif
        return Argument();
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    }
#endif
}

Argument Option::createStringListArgument( const std::vector<const char*> & value ) const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    return Argument( comp.lock(), opt, make_argument( GPGME_CONF_STRING, value ), true );
#else
    return Argument();
#endif
}

Argument Option::createStringListArgument( const std::vector<std::string> & value ) const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    return Argument( comp.lock(), opt, make_argument( GPGME_CONF_STRING, value ), true );
#else
    return Argument();
#endif
}

Argument Option::createIntListArgument( const std::vector<int> & value ) const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    return Argument( comp.lock(), opt, make_argument( GPGME_CONF_INT32, value ), true );
#else
    return Argument();
#endif
}

Argument Option::createUIntListArgument( const std::vector<unsigned int> & value ) const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    return Argument( comp.lock(), opt, make_argument( GPGME_CONF_UINT32, value ), true );
#else
    return Argument();
#endif
}




Argument::Argument( const shared_gpgme_conf_comp_t & comp, gpgme_conf_opt_t opt, gpgme_conf_arg_t arg, bool owns )
    : comp( comp ),
      opt( opt ),
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
      arg( owns ? arg : mygpgme_conf_arg_copy( arg, opt ? opt->alt_type : GPGME_CONF_NONE ) )
#else
      arg( 0 )
#endif
{

}

#if 0
Argument::Argument( const shared_gpgme_conf_comp_t & comp, gpgme_conf_opt_t opt, gpgme_conf_arg_t arg )
    : comp( comp ),
      opt( opt ),
      arg( mygpgme_conf_arg_copy( arg, opt ? opt->alt_type : GPGME_CONF_NONE ) )
{

}
#endif

Argument::Argument( const Argument & other )
    : comp( other.comp ),
      opt( other.opt ),
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
      arg( mygpgme_conf_arg_copy( other.arg, opt ? opt->alt_type : GPGME_CONF_NONE ) )
#else
      arg( 0 )
#endif
{

}

Argument::~Argument() {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    gpgme_conf_arg_release( arg, opt ? opt->alt_type : GPGME_CONF_NONE );
#endif
}

Option Argument::parent() const {
    return Option( comp.lock(), opt );
}

bool Argument::boolValue() const {
    return numberOfTimesSet();
}

unsigned int Argument::numElements() const {
    if ( isNull() ) {
        return 0;
    }
    unsigned int result = 0;
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    for ( gpgme_conf_arg_t a = arg ; a ; a = a->next ) {
        ++result;
    }
#endif
    return result;
}

const char * Argument::stringValue( unsigned int idx ) const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() || opt->alt_type != GPGME_CONF_STRING ) {
        return 0;
    }
    gpgme_conf_arg_t a = arg;
    while ( a && idx ) {
        a = a->next;
        --idx;
    }
    return a ? a->value.string : 0 ;
#else
    return 0;
#endif
}

int Argument::intValue( unsigned int idx ) const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() || opt->alt_type != GPGME_CONF_INT32 ) {
        return 0;
    }
    gpgme_conf_arg_t a = arg;
    while ( a && idx ) {
        a = a->next;
        --idx;
    }
    return a ? a->value.int32 : 0 ;
#else
    return 0;
#endif
}

unsigned int Argument::uintValue( unsigned int idx ) const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() || opt->alt_type != GPGME_CONF_UINT32 ) {
        return 0;
    }
    gpgme_conf_arg_t a = arg;
    while ( a && idx ) {
        a = a->next;
        --idx;
    }
    return a ? a->value.uint32 : 0 ;
#else
    return 0;
#endif
}

unsigned int Argument::numberOfTimesSet() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() || opt->alt_type != GPGME_CONF_NONE ) {
        return 0;
    }
    return arg->value.count;
#else
    return 0;
#endif
}

std::vector<const char *> Argument::stringValues() const {
    if ( isNull() || opt->alt_type != GPGME_CONF_STRING ) {
        return std::vector<const char *>();
    }
    std::vector<const char *> result;
    for ( gpgme_conf_arg_t a = arg ; a ; a = a->next ) {
        result.push_back( a->value.string );
    }
    return result;
}

std::vector<int> Argument::intValues() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() || opt->alt_type != GPGME_CONF_INT32 ) {
        return std::vector<int>();
    }
#endif
    std::vector<int> result;
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    for ( gpgme_conf_arg_t a = arg ; a ; a = a->next ) {
        result.push_back( a->value.int32 );
    }
#endif
    return result;
}

std::vector<unsigned int> Argument::uintValues() const {
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    if ( isNull() || opt->alt_type != GPGME_CONF_UINT32 ) {
        return std::vector<unsigned int>();
    }
#endif
    std::vector<unsigned int> result;
#ifdef HAVE_GPGME_PROTOCOL_GPGCONF
    for ( gpgme_conf_arg_t a = arg ; a ; a = a->next ) {
        result.push_back( a->value.uint32 );
    }
#endif
    return result;
}

std::ostream & Configuration::operator<<( std::ostream & os, Level level ) {
    switch ( level ) {
    case Basic:     return os << "Basic";
    case Advanced:  return os << "Advanced";
    case Expert:    return os << "Expert";
    case Invisible: return os << "Invisible";
    case Internal:  return os << "Internal";
    case NumLevels: ;
    }
    return os << "<unknown>";
}

std::ostream & Configuration::operator<<( std::ostream & os, Type type ) {
    switch ( type ) {
    case NoType:              return os << "None";
    case StringType:          return os << "String";
    case IntegerType:         return os << "Integer";
    case UnsignedIntegerType: return os << "UnsignedInteger";
    case FilenameType:        return os << "Filename";
    case LdapServerType:      return os << "LdapServer";
    case KeyFingerprintType:  return os << "KeyFingerprint";
    case PublicKeyType:       return os << "PublicKey";
    case SecretKeyType:       return os << "SecretKey";
    case AliasListType:       return os << "AliasList";
    case MaxType: ;
    }
    return os << "<unknown>";
}

std::ostream & Configuration::operator<<( std::ostream & os, Flag f ) {
    unsigned int flags = f;
    std::vector<const char *> s;
    if ( flags & Group ) {
        s.push_back( "Group" );
    }
    if ( flags & Optional ) {
        s.push_back( "Optional" );
    }
    if ( flags & List ) {
        s.push_back( "List" );
    }
    if ( flags & Runtime ) {
        s.push_back( "Runtime" );
    }
    if ( flags & Default ) {
        s.push_back( "Default" );
    }
    if ( flags & DefaultDescription ) {
        s.push_back( "DefaultDescription" );
    }
    if ( flags & NoArgumentDescription ) {
        s.push_back( "NoArgumentDescription" );
    }
    if ( flags & NoChange ) {
        s.push_back( "NoChange" );
    }
    flags &= ~( Group|Optional|List|Runtime|Default|DefaultDescription|NoArgumentDescription|NoChange );
    if ( flags ) {
        s.push_back( "other flags(" );
    }
    std::copy( s.begin(), s.end(),
               std::ostream_iterator<const char*>( os, "|" ) );
    if ( flags ) {
        os << flags << ')';
    }
    return os;
}

std::ostream & Configuration::operator<<( std::ostream & os, const Component & c ) {
    os << "Component["
       << "\n  name       : " << protect( c.name() )
       << "\n  description: " << protect( c.description() )
       << "\n  programName: " << protect( c.programName() )
       << "\n  options    : \n";
    const std::vector<Option> options = c.options();
    std::copy( options.begin(), options.end(),
               std::ostream_iterator<Option>( os, "\n" ) );
    os << "\n]";
    return os;
}

std::ostream & Configuration::operator<<( std::ostream & os, const Option & o ) {
    return os << "Option["
              << "\n  name:       : " << protect( o.name() )
              << "\n  description : " << protect( o.description() )
              << "\n  argName     : " << protect( o.argumentName() )
              << "\n  flags       : " << static_cast<Flag>( o.flags() )
              << "\n  level       : " << o.level()
              << "\n  type        : " << o.type()
              << "\n  alt_type    : " << o.alternateType()
              << "\n  default_val : " << o.defaultValue()
              << "\n  default_desc: " << protect( o.defaultDescription() )
              << "\n  no_arg_value: " << o.noArgumentValue()
              << "\n  no_arg_desc : " << protect( o.noArgumentDescription() )
              << "\n  active_value: " << o.activeValue()
              << "\n  new_value   : " << o.newValue()
              << "\n  --> cur_val : " << o.currentValue()
              << "\n  set         : " << o.set()
              << "\n  dirty       : " << o.dirty()
              << "\n]"
        ;
}

std::ostream & Configuration::operator<<( std::ostream & os, const Argument & a ) {
    const Option o = a.parent();
    const bool list = o.flags() & List;
    os << "Argument[";
    if ( a ) {
        switch ( o.alternateType() ) {
        case NoType:
            if ( list ) {
                os << a.numberOfTimesSet() << 'x';
            } else {
                os << a.boolValue();
            }
            break;
        default:
        case StringType:
            if ( list ) {
                const std::vector<const char*> v = a.stringValues();
                os << v.size() << ':';
                // can't use std::copy + ostream_iterator here, since we need the protect() call
                bool first = true;
                BOOST_FOREACH ( const char * s, v ) {
                    if ( first ) {
                        first = false;
                    } else {
                        os << ',';
                    }
                    os << protect( s );
                }
            } else {
                os << protect( a.stringValue() );
            }
            break;
        case IntegerType:
            if ( list ) {
                const std::vector<int> v = a.intValues();
                os << v.size() << ':';
                std::copy( v.begin(), v.end(),
                           std::ostream_iterator<int>( os, "," ) );
            } else {
                os << a.intValue();
            }
            break;
        case UnsignedIntegerType:
            if ( list ) {
                const std::vector<unsigned int> v = a.uintValues();
                os << v.size() << ':';
                std::copy( v.begin(), v.end(),
                           std::ostream_iterator<unsigned int>( os, "," ) );
            } else {
                os << a.intValue();
            }
            break;
        }
    }
    return os << ']';
}