/***************************************************************************
 * rubyscript.h
 * This file is part of the KDE project
 * copyright (C)2005 by Cyrille Berger (cberger@cberger.net)
 *
 * This program 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.
 * This program 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 this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 ***************************************************************************/

#include "rubyscript.h"

#include <ruby.h>
#include <env.h>
#include <rubysig.h>
#include <node.h>

#include <main/scriptcontainer.h>

#include "rubyconfig.h"
#include "rubyextension.h"
#include "rubyinterpreter.h"

extern NODE *ruby_eval_tree;

namespace Kross {

namespace Ruby {

class RubyScriptPrivate {
    friend class RubyScript;
    RubyScriptPrivate() : m_compile(0) { }
    RNode* m_compile;
    /// A list of functionnames.
    QStringList m_functions;

    /// A list of classnames.
    QStringList m_classes;
};
    
RubyScript::RubyScript(Kross::Api::Interpreter* interpreter, Kross::Api::ScriptContainer* scriptcontainer)
    : Kross::Api::Script(interpreter, scriptcontainer), d(new RubyScriptPrivate())
{
}


RubyScript::~RubyScript()
{
}

#define selectScript() \
    NODE* old_tree = ruby_eval_tree; \
    ruby_eval_tree = d->m_compile;
#define unselectScript() \
    d->m_compile = 0; \
    ruby_eval_tree = old_tree;

void RubyScript::compile()
{
#ifdef KROSS_RUBY_SCRIPT_DEBUG
    krossdebug("RubyScript::compile()");
#endif
    int critical;

    ruby_nerrs = 0;
    ruby_errinfo = Qnil;
    VALUE src = RubyExtension::toVALUE( m_scriptcontainer->getCode() );
    StringValue(src);
    critical = rb_thread_critical;
    rb_thread_critical = Qtrue;
    ruby_in_eval++;
    d->m_compile = rb_compile_string((char*) m_scriptcontainer->getName().latin1(), src, 0);
    ruby_in_eval--;
    rb_thread_critical = critical;

    if (ruby_nerrs != 0)
    {
#ifdef KROSS_RUBY_SCRIPT_DEBUG
        krossdebug("Compilation has failed");
#endif
        setException( new Kross::Api::Exception(QString("Failed to compile ruby code: %1").arg(STR2CSTR( rb_obj_as_string(ruby_errinfo) )), 0) ); // TODO: get the error
        d->m_compile = 0;
    }
#ifdef KROSS_RUBY_SCRIPT_DEBUG
    krossdebug("Compilation was successfull");
#endif
}

const QStringList& RubyScript::getFunctionNames()
{
#ifdef KROSS_RUBY_SCRIPT_DEBUG
    krossdebug("RubyScript::getFunctionNames()");
#endif
    if(d->m_compile == 0)
    {
        compile();
    }
    return d->m_functions;
}

Kross::Api::Object::Ptr RubyScript::execute()
{
#ifdef KROSS_RUBY_SCRIPT_DEBUG
    krossdebug("RubyScript::execute()");
#endif
    if(d->m_compile == 0)
    {
        compile();
    }
#ifdef KROSS_RUBY_SCRIPT_DEBUG
    krossdebug("Start execution");
#endif
    selectScript();
    int result = ruby_exec();
    if (result != 0)
    {
#ifdef KROSS_RUBY_SCRIPT_DEBUG
        krossdebug("Execution has failed");
#endif
        if( TYPE( ruby_errinfo )  == T_DATA && RubyExtension::isOfExceptionType( ruby_errinfo ) )
        {
#ifdef KROSS_RUBY_SCRIPT_DEBUG
            krossdebug("Kross exception");
#endif
            setException( RubyExtension::convertToException( ruby_errinfo ) );
        } else {
            setException( new Kross::Api::Exception(QString("Failed to execute ruby code: %1").arg(STR2CSTR( rb_obj_as_string(ruby_errinfo) )), 0) ); // TODO: get the error
        }
    }

    unselectScript();
#ifdef KROSS_RUBY_SCRIPT_DEBUG
    krossdebug("Execution is finished");
#endif
    return 0;
}

Kross::Api::Object::Ptr RubyScript::callFunction(const QString& name, Kross::Api::List::Ptr args)
{
    Q_UNUSED(name)
    Q_UNUSED(args)
#ifdef KROSS_RUBY_SCRIPT_DEBUG
    krossdebug("RubyScript::callFunction()");
#endif
    if(d->m_compile == 0)
    {
        compile();
    }
    selectScript();
    unselectScript();
    return 0;
}

const QStringList& RubyScript::getClassNames()
{
#ifdef KROSS_RUBY_SCRIPT_DEBUG
    krossdebug("RubyScript::getClassNames()");
#endif
    if(d->m_compile == 0)
    {
        compile();
    }
    return d->m_classes;
}

Kross::Api::Object::Ptr RubyScript::classInstance(const QString& name)
{
    Q_UNUSED(name)
#ifdef KROSS_RUBY_SCRIPT_DEBUG
    krossdebug("RubyScript::classInstance()");
#endif
    if(d->m_compile == 0)
    {
        compile();
    }
    selectScript();
    unselectScript();
    return 0;
}


}

}