#include "KSGSExpressionEvaluator.h"
#include "../Leser/KSGSLeser.h"
#include "../Befehl/KSGSKlasse.h"
#include "../Error/Error.h"
#include <iostream>

using namespace KSGScript;

KSGSExpressionEvaluatorImpl::KSGSExpressionEvaluatorImpl()
    : ReferenceCounter()
{
    functions = new RCArray< KSGSFunktion >();
    classes = new RCArray< KSGSKlasse >();
    params = new Framework::RCArray<KSGSVariable>();
    variables = new RCArray< KSGSVariable >();
    expression = "";
}

KSGSExpressionEvaluatorImpl::~KSGSExpressionEvaluatorImpl()
{
    params->release();
    functions->release();
    classes->release();
    variables->release();
}

void KSGSExpressionEvaluatorImpl::compile()
{
    functions->leeren();
    classes->leeren();
    variables->leeren();
    Framework::Text script = "func double start(";
    Iterator<Text *> name = paramNames->getIterator();
    for( Iterator<KSGSVariable *> it = params->getIterator(); it && name; it = it.next(), name = name.next() )
    {
        switch( it->getTyp() )
        {
        case KSGS_BOOL:
            script += "bool " + name;
            break;
        case KSGS_INT:
            script += "int " + name;
            break;
        case KSGS_DOUBLE:
            script += "double " + name;
            break;
        case KSGS_ARRAY:
            script += "Array " + name;
            break;
        case KSGS_THREAD:
            script += "Thread " + name;
            break;
        case KSGS_TEXT:
            script += "Text " + name;
            break;
        case KSGS_BILD:
            script += "Bild " + name;
            break;
        case KSGS_MAUSEREIGNIS:
            script += "MausEreignis " + name;
            break;
        case KSGS_TASTATUREREIGNIS:
            script += "TastaturEreignis " + name;
            break;
        case KSGS_TEXTFELD:
            script += "TextFeld " + name;
            break;
        case KSGS_KNOPF:
            script += "Knopf " + name;
            break;
        case KSGS_FENSTER:
            script += "Fenster " + name;
            break;
        case KSGS_BILDO:
            script += "BildZ " + name;
            break;
        case KSGS_ANIMATION2DDATA:
            script += "Animation2DData " + name;
            break;
        case KSGS_ANIMATION2D:
            script += "Animation2D " + name;
            break;
        }
        if( it.hasNext() )
            script += ", ";
    }
    script += Text( ") { return " ) + expression + Text( "; }" );
    TextReader *expressionReader = new TextReader( new Text( script ) );
    KSGSLeser *reader = new KSGSLeser( expressionReader, this, "expression" );
    if( !reader->laden() )
    {
        expressionReader->release();
        return;
    }
    Array< KSGSVariableDef * > *varDefs = new Array< KSGSVariableDef * >();
    if( !reader->compile( classes, functions, varDefs ) )
    {
        varDefs->release();
        expressionReader->release();
        return;
    }
    reader->release();
    int vAnz = varDefs->getEintragAnzahl();
    for( int i = 0; i < vAnz; i++ )
    {
        KSGSVariable *var = KSGSKlasseInstanz::erstellVariable( this, varDefs->get( i ) );
        if( var )
            variables->add( var );
        delete varDefs->get( i );
    }
    varDefs->release();
    expressionReader->release();

}

KSGSVariable *KSGSExpressionEvaluatorImpl::createParameter( Framework::Text name, int type )
{
    this->paramNames->add( new Text( name ) );
    KSGSVariable *var = KSGSKlasseInstanz::erstellVariable( this, new KSGSVariableDef{ type, 0, 0, "" } );
    this->params->add( dynamic_cast<KSGSVariable *>( var->getThis() ) );
    if( this->expression.getLength() > 0 )
        compile();
    return var;
}

KSGSVariable *KSGSExpressionEvaluatorImpl::getParameter( Framework::Text name )
{
    int vAnz = paramNames->getEintragAnzahl();
    for( int i = 0; i < vAnz; i++ )
    {
        if( paramNames->z( i )->istGleich( name ) )
            return params->get( i );
    }
    return 0;
}

void KSGSExpressionEvaluatorImpl::setExpression( Framework::Text expression )
{
    this->expression = expression;
    compile();
}

KSGSVariable *KSGSExpressionEvaluatorImpl::evaluate()
{
    if( functions->getEintragAnzahl() > 0 )
        return startFunktion( functions->z( 0 )->getId(), dynamic_cast<RCArray<KSGSVariable>*>( params->getThis() ) );
    return 0;
}

void KSGSExpressionEvaluatorImpl::logNachricht( char *n )
{
    std::cout << n << "\n";
}

Framework::Text *KSGSExpressionEvaluatorImpl::convertPfad( char *pf )
{
    Text *ret = new Text( pf );
    ret->ersetzen( '\\', '/' );
    if( ret->getText()[ 0 ] == '/' )
    {
        ret->remove( 0 );
        return ret;
    }
    return ret;
}

void KSGSExpressionEvaluatorImpl::setVariable( int id, KSGSVariable *var )
{
    variables->set( var, id );
}

KSGSVariable *KSGSExpressionEvaluatorImpl::startFunktion( int id, Framework::RCArray< KSGSVariable > *parameter )
{
    if( !functions->z( id ) || functions->z( id )->getSichtbarkeit() != 0 )
    {
        error( 19, {}, this );
        parameter->release();
        return 0;
    }
    KSGSFunktionInstanz *inst = functions->z( id )->erstellInstanz( dynamic_cast<KSGScriptProcessor *>( getThis() ), 0, parameter );
    KSGSVariable *ret = inst->startFunktion();
    inst->release();
    return ret;
}

KSGSVariable *KSGSExpressionEvaluatorImpl::erstellKlassenInstanz( int id )
{
    int anz = classes->getEintragAnzahl();
    for( int i = 0; i < anz; i++ )
    {
        if( classes->z( i ) && classes->z( i )->getId() == id )
            return classes->z( i )->erstellInstanz( this );
    }
    error( 2, {}, this );
    return 0;
}

KSGSVariable *KSGSExpressionEvaluatorImpl::getVariable( int id ) const
{
    if( !variables || !variables->z( id ) )
    {
        error( 17, {}, (KSGScriptProcessor *)this );
        return 0;
    }
    return variables->get( id );
}

int KSGSExpressionEvaluatorImpl::getScriptId() const
{
    return 0;
}

Framework::Bildschirm *KSGSExpressionEvaluatorImpl::zBildschirm() const
{
    return 0;
}

Framework::Schrift *KSGSExpressionEvaluatorImpl::zSchrift() const
{
    return 0;
}

int KSGSExpressionEvaluatorImpl::getFunktionId( const char *name ) const
{
    int anz = functions->getEintragAnzahl();
    for( int i = 0; i < anz; i++ )
    {
        if( functions->z( i )->hatName( name ) )
            return i;
    }
    return -1;
}

bool KSGSExpressionEvaluatorImpl::istBeendet( int scrId ) const
{
    return false;
}

KSGSVariable *KSGSExpressionEvaluatorImpl::callback( Framework::RCArray< KSGSVariable > *parameter ) const
{
    parameter->release();
    return 0;
}