/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2020 KiCad Developers, see change_log.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */


#include <fctsys.h>
#include <class_board.h>
#include <class_board_item.h>

#include <drc_proto/drc_rule.h>
#include <pcb_expr_evaluator.h>


test::DRC_RULE::DRC_RULE() :
    m_Unary( false ),
    m_Enabled( true ),
    m_Conditional( false ),
    m_Priority( 0 ),
    m_Severity( DRC_RULE_SEVERITY_T::DRC_SEVERITY_ERROR )
{
}


test::DRC_RULE::~DRC_RULE()
{
}


test::DRC_RULE_CONDITION::DRC_RULE_CONDITION()
{
    m_ucode = nullptr;
}


test::DRC_RULE_CONDITION::~DRC_RULE_CONDITION()
{
    delete m_ucode;
}


bool test::DRC_RULE_CONDITION::EvaluateFor( const BOARD_ITEM* aItemA, const BOARD_ITEM* aItemB,
                                            PCB_LAYER_ID aLayer )
{
    // An unconditional rule is always true
    if( m_Expression.IsEmpty() )
        return true;

    // A rule which failed to compile is always false
    if( !m_ucode )
        return false;

    BOARD_ITEM* a = const_cast<BOARD_ITEM*>( aItemA );
    BOARD_ITEM* b = aItemB ? const_cast<BOARD_ITEM*>( aItemB ) : DELETED_BOARD_ITEM::GetInstance();
    PCB_EXPR_CONTEXT ctx( aLayer );
    ctx.SetItems( a, b );

    return m_ucode->Run( &ctx )->AsDouble() != 0.0;
}


bool test::DRC_RULE_CONDITION::Compile( )
{
    PCB_EXPR_COMPILER compiler;

    if (!m_ucode)
        m_ucode = new PCB_EXPR_UCODE;

    PCB_EXPR_CONTEXT preflightContext( F_Cu );

    bool ok = compiler.Compile( m_Expression.ToUTF8().data(), m_ucode, &preflightContext );
    return ok;
}