/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2017 KiCad Developers, see CHANGELOG.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
 */

/**
 * @file  pcbnew_action_plugins.cpp
 * @brief Class PCBNEW_PYTHON_ACTION_PLUGINS
 */

#include "pcbnew_action_plugins.h"
#include <python_scripting.h>
#include <stdio.h>
#include <macros.h>
#include <pcbnew_id.h>
#include <menus_helpers.h>
#include <class_drawpanel.h>    // m_canvas
#include <class_board.h>
#include <class_module.h>
#include <class_track.h>
#include <class_drawsegment.h>
#include <class_zone.h>
#include <board_commit.h>
#include <kicad_device_context.h>

PYTHON_ACTION_PLUGIN::PYTHON_ACTION_PLUGIN( PyObject* aAction )
{
    PyLOCK lock;

    this->m_PyAction = aAction;
    Py_XINCREF( aAction );
}


PYTHON_ACTION_PLUGIN::~PYTHON_ACTION_PLUGIN()
{
    PyLOCK lock;

    Py_XDECREF( this->m_PyAction );
}


PyObject* PYTHON_ACTION_PLUGIN::CallMethod( const char* aMethod, PyObject* aArglist )
{
    PyLOCK lock;

    PyErr_Clear();
    // pFunc is a new reference to the desired method
    PyObject* pFunc = PyObject_GetAttrString( this->m_PyAction, aMethod );

    if( pFunc && PyCallable_Check( pFunc ) )
    {
        PyObject* result = PyObject_CallObject( pFunc, aArglist );

        if( PyErr_Occurred() )
        {
            wxMessageBox( PyErrStringWithTraceback(),
                    wxT( "Exception on python action plugin code" ),
                    wxICON_ERROR | wxOK );
        }

        if( result )
        {
            Py_XDECREF( pFunc );
            return result;
        }
    }
    else
    {
        printf( "method not found, or not callable: %s\n", aMethod );
    }

    if( pFunc )
    {
        Py_XDECREF( pFunc );
    }

    return NULL;
}


wxString PYTHON_ACTION_PLUGIN::CallRetStrMethod( const char* aMethod, PyObject* aArglist )
{
    wxString    ret;
    PyLOCK      lock;

    PyObject* result = CallMethod( aMethod, aArglist );

    if( result )
    {
        const char* str_res = PyString_AsString( result );
        ret = FROM_UTF8( str_res );
        Py_DECREF( result );
    }

    return ret;
}


wxString PYTHON_ACTION_PLUGIN::GetCategoryName()
{
    PyLOCK lock;

    return CallRetStrMethod( "GetCategoryName" );
}


wxString PYTHON_ACTION_PLUGIN::GetName()
{
    PyLOCK lock;

    return CallRetStrMethod( "GetName" );
}


wxString PYTHON_ACTION_PLUGIN::GetDescription()
{
    PyLOCK lock;

    return CallRetStrMethod( "GetDescription" );
}


void PYTHON_ACTION_PLUGIN::Run()
{
    PyLOCK lock;

    CallMethod( "Run" );
}


void* PYTHON_ACTION_PLUGIN::GetObject()
{
    return (void*) m_PyAction;
}


void PYTHON_ACTION_PLUGINS::register_action( PyObject* aPyAction )
{
    PYTHON_ACTION_PLUGIN* fw = new PYTHON_ACTION_PLUGIN( aPyAction );

    fw->register_action();
}


void PYTHON_ACTION_PLUGINS::deregister_action( PyObject* aPyAction )
{
    // deregister also destroyes the previously created "PYTHON_ACTION_PLUGIN object"
    ACTION_PLUGINS::deregister_object( (void*) aPyAction );
}


#if defined(KICAD_SCRIPTING) && defined(KICAD_SCRIPTING_ACTION_MENU)

void PCB_EDIT_FRAME::OnActionPlugin( wxCommandEvent& aEvent )
{
    int id = aEvent.GetId();

    ACTION_PLUGIN* actionPlugin = ACTION_PLUGINS::GetActionByMenu( id );

    if( actionPlugin )
    {
        PICKED_ITEMS_LIST itemsList;
        BOARD*  currentPcb  = GetBoard();
        bool    fromEmpty   = false;

        itemsList.m_Status = UR_CHANGED;

        OnModify();

        // Append tracks:
        for( BOARD_ITEM* item = currentPcb->m_Track; item != NULL; item = item->Next() )
        {
            ITEM_PICKER picker( item, UR_CHANGED );
            itemsList.PushItem( picker );
        }

        // Append modules:
        for( BOARD_ITEM* item = currentPcb->m_Modules; item != NULL; item = item->Next() )
        {
            ITEM_PICKER picker( item, UR_CHANGED );
            itemsList.PushItem( picker );
        }

        // Append drawings
        for( BOARD_ITEM* item = currentPcb->m_Drawings; item != NULL; item = item->Next() )
        {
            ITEM_PICKER picker( item, UR_CHANGED );
            itemsList.PushItem( picker );
        }

        // Append zones outlines
        for( int ii = 0; ii < currentPcb->GetAreaCount(); ii++ )
        {
            ITEM_PICKER picker( (EDA_ITEM*) currentPcb->GetArea(
                            ii ), UR_CHANGED );
            itemsList.PushItem( picker );
        }

        // Append zones segm:
        for( BOARD_ITEM* item = currentPcb->m_Zone; item != NULL; item = item->Next() )
        {
            ITEM_PICKER picker( item, UR_CHANGED );
            itemsList.PushItem( picker );
        }

        if( itemsList.GetCount() > 0 )
            SaveCopyInUndoList( itemsList, UR_CHANGED, wxPoint( 0.0, 0.0 ) );
        else
            fromEmpty = true;

        itemsList.ClearItemsList();

        // Execute plugin himself...
        actionPlugin->Run();

        currentPcb->m_Status_Pcb = 0;

        // Get back the undo buffer to fix some modifications
        PICKED_ITEMS_LIST* oldBuffer = NULL;

        if( fromEmpty )
        {
            oldBuffer = new PICKED_ITEMS_LIST();
            oldBuffer->m_Status = UR_NEW;
        }
        else
        {
            oldBuffer = GetScreen()->PopCommandFromUndoList();
            wxASSERT( oldBuffer );
        }

        // Try do discover what was modified

        PICKED_ITEMS_LIST deletedItemsList;

        // Found deleted modules
        for( unsigned int i = 0; i < oldBuffer->GetCount(); i++ )
        {
            BOARD_ITEM* item = (BOARD_ITEM*) oldBuffer->GetPickedItem( i );
            ITEM_PICKER picker( item, UR_DELETED );

            wxASSERT( item );

            switch( item->Type() )
            {
            case PCB_NETINFO_T:
            case PCB_MARKER_T:
            case PCB_MODULE_T:
            case PCB_TRACE_T:
            case PCB_VIA_T:
            case PCB_LINE_T:
            case PCB_TEXT_T:
            case PCB_DIMENSION_T:
            case PCB_TARGET_T:
            case PCB_ZONE_T:

                // If item has a list it's mean that the element is on the board
                if( item->GetList() == NULL )
                {
                    deletedItemsList.PushItem( picker );
                }

                break;

            case PCB_ZONE_AREA_T:
            {
                bool zoneFound = false;

                for( int ii = 0; ii < currentPcb->GetAreaCount(); ii++ )
                    zoneFound |= currentPcb->GetArea( ii ) == item;

                if( !zoneFound )
                {
                    deletedItemsList.PushItem( picker );
                }

                break;
            }

            default:
                wxString msg;
                msg.Printf( wxT( "(PCB_EDIT_FRAME::OnActionPlugin) needs work: "
                                 "BOARD_ITEM type (%d) not handled" ),
                        item->Type() );
                wxFAIL_MSG( msg );
                break;
            }
        }

        // Mark deleted elements in undolist
        for( unsigned int i = 0; i < deletedItemsList.GetCount(); i++ )
        {
            oldBuffer->PushItem( deletedItemsList.GetItemWrapper( i ) );
        }

        // Find new modules
        for( BOARD_ITEM* item = currentPcb->m_Modules; item != NULL; item = item->Next() )
        {
            if( !oldBuffer->ContainsItem( item ) )
            {
                ITEM_PICKER picker( item, UR_NEW );
                oldBuffer->PushItem( picker );
            }
        }

        for( BOARD_ITEM* item = currentPcb->m_Track; item != NULL; item = item->Next() )
        {
            if( !oldBuffer->ContainsItem( item ) )
            {
                ITEM_PICKER picker( item, UR_NEW );
                oldBuffer->PushItem( picker );
            }
        }

        for( BOARD_ITEM* item = currentPcb->m_Drawings; item != NULL; item = item->Next() )
        {
            if( !oldBuffer->ContainsItem( item ) )
            {
                ITEM_PICKER picker( item, UR_NEW );
                oldBuffer->PushItem( picker );
            }
        }

        for( BOARD_ITEM* item = currentPcb->m_Zone; item != NULL; item = item->Next() )
        {
            if( !oldBuffer->ContainsItem( item ) )
            {
                ITEM_PICKER picker( item, UR_NEW );
                oldBuffer->PushItem( picker );
            }
        }

        for( int ii = 0; ii < currentPcb->GetAreaCount(); ii++ )
        {
            if( !oldBuffer->ContainsItem( (EDA_ITEM*) currentPcb->GetArea( ii ) ) )
            {
                ITEM_PICKER picker( (EDA_ITEM*) currentPcb->GetArea(
                                ii ), UR_NEW );
                oldBuffer->PushItem( picker );
            }
        }


        GetScreen()->PushCommandToUndoList( oldBuffer );

        if( IsGalCanvasActive() )
        {
            UseGalCanvas( GetGalCanvas() );
        }
        else
        {
            GetScreen()->SetModify();
            Refresh();
        }
    }
}


void PCB_EDIT_FRAME::RebuildActionPluginMenus()
{
    wxMenu* actionMenu = GetMenuBar()->FindItem( ID_TOOLBARH_PCB_ACTION_PLUGIN )->GetSubMenu();

    if( !actionMenu ) // Should not occur.
        return;

    // First, remove existing submenus, if they are too many
    wxMenuItemList list = actionMenu->GetMenuItems();
    // The first menuitems are the refresh menu and separator. do not count them
    int act_menu_count = -2;

    std::vector<wxMenuItem*> available_menus;

    for( auto iter = list.begin(); iter != list.end(); ++iter, act_menu_count++ )
    {
        if( act_menu_count < 0 )
            continue;

        wxMenuItem* item = *iter;

        if( act_menu_count < ACTION_PLUGINS::GetActionsCount() )
        {
            available_menus.push_back( item );
            continue;
        }

        // Remove menus which are not usable for our current plugin list
        Disconnect( item->GetId(), wxEVT_COMMAND_MENU_SELECTED,
                (wxObjectEventFunction) (wxEventFunction) (wxCommandEventFunction) &
                PCB_EDIT_FRAME::OnActionPlugin );
        actionMenu->Delete( item );
    }

    for( int ii = 0; ii < ACTION_PLUGINS::GetActionsCount(); ii++ )
    {
        wxMenuItem* item;

        if( ii < (int) available_menus.size() )
        {
            item = available_menus[ii];
            item->SetItemLabel( ACTION_PLUGINS::GetAction( ii )->GetName() );
            item->SetHelp( ACTION_PLUGINS::GetAction( ii )->GetDescription() );
        }
        else
        {
            item = AddMenuItem( actionMenu, wxID_ANY,
                    ACTION_PLUGINS::GetAction( ii )->GetName(),
                    ACTION_PLUGINS::GetAction( ii )->GetDescription(),
                    KiBitmap( hammer_xpm ) );

            Connect( item->GetId(), wxEVT_COMMAND_MENU_SELECTED,
                    (wxObjectEventFunction) (wxEventFunction) (wxCommandEventFunction) &
                    PCB_EDIT_FRAME::OnActionPlugin );
        }

        ACTION_PLUGINS::SetActionMenu( ii, item->GetId() );
    }
}


#endif