/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2015 Jean-Pierre Charras, jp.charras at wanadoo.fr
 * Copyright (C) 2012 Wayne Stambaugh <stambaughw@gmail.com>
 * Copyright (C) 1992-2019 KiCad Developers, see AUTHORS.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 <gestfich.h>
#include <pgm_base.h>
#include <sch_screen.h>
#include <sch_edit_frame.h>
#include <invoke_sch_dialog.h>
#include <project.h>
#include <kiface_i.h>
#include <bitmaps.h>
#include <reporter.h>
#include <wildcards_and_files_ext.h>
#include <sch_view.h>
#include <netlist_object.h>
#include <sch_marker.h>
#include <sch_component.h>
#include <connection_graph.h>
#include <tools/ee_actions.h>
#include <tool/tool_manager.h>
#include <dialog_erc.h>
#include <erc.h>
#include <id.h>


DIALOG_ERC::DIALOG_ERC( SCH_EDIT_FRAME* parent ) :
    DIALOG_ERC_BASE( parent, ID_DIALOG_ERC ),  // parent looks for this ID explicitly
    m_initialized( false )
{
    m_parent = parent;
    m_lastMarkerFound = nullptr;

    wxFont infoFont = wxSystemSettings::GetFont( wxSYS_DEFAULT_GUI_FONT );
    infoFont.SetSymbolicSize( wxFONTSIZE_SMALL );
    m_textMarkers->SetFont( infoFont );
    m_titleMessages->SetFont( infoFont );

    Init();

    // We use a sdbSizer to get platform-dependent ordering of the action buttons, but
    // that requires us to correct the button labels here.
    m_sdbSizer1OK->SetLabel( _( "Run" ) );
    m_sdbSizer1Cancel->SetLabel( _( "Close" ) );
    m_sdbSizer1->Layout();

    m_sdbSizer1OK->SetDefault();

    // Now all widgets have the size fixed, call FinishDialogSettings
    FinishDialogSettings();
}


void DIALOG_ERC::Init()
{
    m_initialized = false;

    SCH_SCREENS screens;
    updateMarkerCounts( &screens );

    DisplayERC_MarkersList();
}


void DIALOG_ERC::updateMarkerCounts( SCH_SCREENS *screens )
{
    int markers = screens->GetMarkerCount( MARKER_BASE::MARKER_ERC,
                                           MARKER_BASE::MARKER_SEVERITY_UNSPEC );
    int warnings = screens->GetMarkerCount( MARKER_BASE::MARKER_ERC,
                                            MARKER_BASE::MARKER_SEVERITY_WARNING );
    int errors = screens->GetMarkerCount( MARKER_BASE::MARKER_ERC,
                                          MARKER_BASE::MARKER_SEVERITY_ERROR );

    wxString num;
    num.Printf( wxT( "%d" ), markers );
    m_TotalErrCount->SetValue( num );

    num.Printf( wxT( "%d" ), errors );
    m_LastErrCount->SetValue( num );

    num.Printf( wxT( "%d" ), warnings );
    m_LastWarningCount->SetValue( num );
}


/* Delete the old ERC markers, over the whole hierarchy
 */
void DIALOG_ERC::OnEraseDrcMarkersClick( wxCommandEvent& event )
{
    SCH_SCREENS ScreenList;

    ScreenList.DeleteAllMarkers( MARKER_BASE::MARKER_ERC );
    updateMarkerCounts( &ScreenList );

    m_MarkersList->ClearList();
    m_parent->GetCanvas()->Refresh();
}


// This is a modeless dialog so we have to handle these ourselves.
void DIALOG_ERC::OnButtonCloseClick( wxCommandEvent& event )
{
    Close();
}


void DIALOG_ERC::OnCloseErcDialog( wxCloseEvent& event )
{
    Destroy();
}


void DIALOG_ERC::OnErcCmpClick( wxCommandEvent& event )
{
    wxBusyCursor busy;
    m_MarkersList->ClearList();

    m_MessagesList->Clear();
    wxSafeYield();      // m_MarkersList must be redraw

    WX_TEXT_CTRL_REPORTER reporter( m_MessagesList );
    TestErc( reporter );
}


void DIALOG_ERC::RedrawDrawPanel()
{
    WINDOW_THAWER thawer( m_parent );

    m_parent->GetCanvas()->Refresh();
}


void DIALOG_ERC::OnLeftClickMarkersList( wxHtmlLinkEvent& event )
{
    wxString link = event.GetLinkInfo().GetHref();

    m_lastMarkerFound = nullptr;

    long index;

    if( !link.ToLong( &index ) )
        return;

    const SCH_MARKER* marker = m_MarkersList->GetItem( index );

    if( !marker )
        return;

    // Search for the selected marker
    unsigned i;
    SCH_SHEET_LIST  sheetList( g_RootSheet );
    bool found = false;

    for( i = 0; i < sheetList.size(); i++ )
    {
        for( auto aItem : sheetList[i].LastScreen()->Items().OfType( SCH_MARKER_T ) )
        {
            if( static_cast<const SCH_MARKER*>( aItem ) == marker )
            {
                found = true;
                break;
            }
        }

        if( found )
            break;
    }

    if( !found ) // Error
    {
        wxMessageBox( _( "Marker not found" ) );

        // The marker was deleted, so rebuild marker list
        DisplayERC_MarkersList();
        return;
    }

    if( sheetList[i] != m_parent->GetCurrentSheet() )
    {
        m_parent->GetToolManager()->RunAction( ACTIONS::cancelInteractive, true );
        m_parent->GetToolManager()->RunAction( EE_ACTIONS::clearSelection, true );

        m_parent->SetCurrentSheet( sheetList[i] );
        m_parent->DisplayCurrentSheet();
        sheetList[i].LastScreen()->SetZoom( m_parent->GetScreen()->GetZoom() );
        m_parent->RedrawScreen( (wxPoint) m_parent->GetScreen()->m_ScrollCenter, false );
    }

    m_lastMarkerFound = marker;
    m_parent->FocusOnLocation( marker->m_Pos );
    RedrawDrawPanel();
}


void DIALOG_ERC::OnLeftDblClickMarkersList( wxMouseEvent& event )
{
    // Remember: OnLeftClickMarkersList was called just before and therefore m_lastMarkerFound
    // was initialized (NULL if not found).
    if( m_lastMarkerFound )
    {
        m_parent->FocusOnLocation( m_lastMarkerFound->m_Pos );
        RedrawDrawPanel();
    }

    Close();
}



void DIALOG_ERC::DisplayERC_MarkersList()
{
    SCH_SHEET_LIST sheetList( g_RootSheet);
    m_MarkersList->ClearList();

    for( unsigned i = 0; i < sheetList.size(); i++ )
    {
        for( auto aItem : sheetList[i].LastScreen()->Items().OfType( SCH_MARKER_T ) )
        {
            SCH_MARKER* marker = static_cast<SCH_MARKER*>( aItem );

            if( marker->GetMarkerType() == MARKER_BASE::MARKER_ERC )
                m_MarkersList->AppendToList( marker );
        }
    }

    m_MarkersList->DisplayList( GetUserUnits() );
}


void DIALOG_ERC::TestErc( REPORTER& aReporter )
{
    wxFileName fn;

    // Build the whole sheet list in hierarchy (sheet, not screen)
    SCH_SHEET_LIST sheets( g_RootSheet );
    sheets.AnnotatePowerSymbols();

    if( m_parent->CheckAnnotate( aReporter, false ) )
    {
        if( aReporter.HasMessage() )
            aReporter.ReportTail( _( "Annotation required!" ), RPT_SEVERITY_ERROR );

        return;
    }

    SCH_SCREENS screens;

    // Erase all previous DRC markers.
    screens.DeleteAllMarkers( MARKER_BASE::MARKER_ERC );

    // Test duplicate sheet names inside a given sheet.  While one can have multiple references
    // to the same file, each must have a unique name.
    TestDuplicateSheetNames( true );

    TestConflictingBusAliases();

    // The connection graph has a whole set of ERC checks it can run
    m_parent->RecalculateConnections( NO_CLEANUP );
    g_ConnectionGraph->RunERC();

    // Test is all units of each multiunit component have the same footprint assigned.
    TestMultiunitFootprints( sheets );

    std::unique_ptr<NETLIST_OBJECT_LIST> objectsConnectedList( m_parent->BuildNetListBase() );

    // Reset the connection type indicator
    objectsConnectedList->ResetConnectionsType();

    unsigned lastItemIdx = 0;
    unsigned nextItemIdx = 0;
    int MinConn    = NOC;

    // Check that a pin appears in only one net.  This check is necessary because multi-unit
    // components that have shared pins could be wired to different nets.
    std::unordered_map<wxString, wxString> pin_to_net_map;

    // The netlist generated by SCH_EDIT_FRAME::BuildNetListBase is sorted by net number, which
    // means we can group netlist items into ranges that live in the same net. The range from
    // nextItem to the current item (exclusive) needs to be checked against the current item.
    // The lastItem variable is used as a helper to pass the last item's number from one loop
    // iteration to the next, which simplifies the initial pass.
    for( unsigned itemIdx = 0; itemIdx < objectsConnectedList->size(); itemIdx++ )
    {
        auto item = objectsConnectedList->GetItem( itemIdx );
        auto lastItem = objectsConnectedList->GetItem( lastItemIdx );

        auto lastNet = lastItem->GetNet();
        auto net = item->GetNet();

        wxASSERT_MSG( lastNet <= net, wxT( "Netlist not correctly ordered" ) );

        if( lastNet != net )
        {
            // New net found:
            MinConn      = NOC;
            nextItemIdx = itemIdx;
        }

        switch( item->m_Type )
        {
        // These items do not create erc problems
        case NETLIST_ITEM::ITEM_UNSPECIFIED:
        case NETLIST_ITEM::SEGMENT:
        case NETLIST_ITEM::BUS:
        case NETLIST_ITEM::JUNCTION:
        case NETLIST_ITEM::LABEL:
        case NETLIST_ITEM::BUSLABELMEMBER:
        case NETLIST_ITEM::PINLABEL:
        case NETLIST_ITEM::GLOBBUSLABELMEMBER:
            break;

        // TODO(JE) Port this to the new system
        case NETLIST_ITEM::PIN:
        {
            // Check if this pin has appeared before on a different net
            if( item->m_Link )
            {
                auto ref = item->GetComponentParent()->GetRef( &item->m_SheetPath );
                wxString pin_name = ref + "_" + item->m_PinNum;

                if( pin_to_net_map.count( pin_name ) == 0 )
                {
                    pin_to_net_map[pin_name] = item->GetNetName();
                }
                else if( pin_to_net_map[pin_name] != item->GetNetName() )
                {
                    SCH_MARKER* marker = new SCH_MARKER();

                    marker->SetData( ERCE_DIFFERENT_UNIT_NET, item->m_Start,
                                     wxString::Format( _( "Pin %s on %s is connected to both %s and %s" ),
                                                       item->m_PinNum,
                                                       ref,
                                                       pin_to_net_map[pin_name],
                                                       item->GetNetName() ),
                                                       item->m_Start );
                    marker->SetMarkerType( MARKER_BASE::MARKER_ERC );
                    marker->SetErrorLevel( MARKER_BASE::MARKER_SEVERITY_ERROR );

                    item->m_SheetPath.LastScreen()->Append( marker );
                }
            }

            // Look for ERC problems between pins:
            TestOthersItems( objectsConnectedList.get(), itemIdx, nextItemIdx, &MinConn );
            break;
        }
        default:
        break;
        }

        lastItemIdx = itemIdx;
    }

    // Test similar labels (i;e. labels which are identical when
    // using case insensitive comparisons)
    if( m_parent->GetErcSettings().IsTestEnabled( ERCE_SIMILAR_GLBL_LABELS )
            || m_parent->GetErcSettings().IsTestEnabled( ERCE_SIMILAR_LABELS ) )
    {
        objectsConnectedList->TestforSimilarLabels();
    }

    // Displays global results:
    updateMarkerCounts( &screens );

    // Display diags:
    DisplayERC_MarkersList();

    // Display new markers from the current screen:
    KIGFX::VIEW* view = m_parent->GetCanvas()->GetView();

    for( auto item : m_parent->GetScreen()->Items().OfType( SCH_MARKER_T ) )
        view->Add( item );

    m_parent->GetCanvas()->Refresh();

    // Display message
    aReporter.ReportTail( _( "Finished" ), RPT_SEVERITY_INFO );
}


wxDialog* InvokeDialogERC( SCH_EDIT_FRAME* aCaller )
{
    // This is a modeless dialog, so new it rather than instantiating on stack.
    DIALOG_ERC* dlg = new DIALOG_ERC( aCaller );

    dlg->Show( true );

    return dlg;     // wxDialog is information hiding about DIALOG_ERC.
}