/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2016-2020 KiCad Developers, see AUTHORS.txt for contributors.
 * Copyright (C) 2017 Chris Pavlina <pavlina.chris@gmail.com>
 * Copyright (C) 2016 Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */

#include <memory>
#include <utility>

#include "pcbnew_settings.h"
#include <board.h>
#include <footprint.h>
#include <eda_draw_frame.h>
#include <footprint_preview_panel.h>
#include <fp_lib_table.h>
#include <kiway.h>
#include <math/box2.h>
#include <pcb_painter.h>
#include <pcb_draw_panel_gal.h>
#include <pcb_edit_frame.h>
#include <pgm_base.h>
#include <settings/settings_manager.h>
#include <view/view.h>
#include <wx/stattext.h>
#include <zoom_defines.h>

FOOTPRINT_PREVIEW_PANEL::FOOTPRINT_PREVIEW_PANEL( KIWAY* aKiway, wxWindow* aParent,
                                                  std::unique_ptr<KIGFX::GAL_DISPLAY_OPTIONS> aOpts,
                                                  GAL_TYPE aGalType ) :
        PCB_DRAW_PANEL_GAL( aParent, -1, wxPoint( 0, 0 ), wxSize( 200, 200 ), *aOpts, aGalType ),
        KIWAY_HOLDER( aKiway, KIWAY_HOLDER::PANEL ),
        m_displayOptions( std::move( aOpts ) ),
        m_currentFootprint( nullptr )
{
    SetStealsFocus( false );
    ShowScrollbars( wxSHOW_SB_NEVER, wxSHOW_SB_NEVER );
    EnableScrolling( false, false );    // otherwise Zoom Auto disables GAL canvas

    m_dummyBoard = std::make_unique<BOARD>();
    UpdateColors();
    SyncLayersVisibility( m_dummyBoard.get() );

    Raise();
    Show( true );
    StartDrawing();
}


FOOTPRINT_PREVIEW_PANEL::~FOOTPRINT_PREVIEW_PANEL( )
{
    if( m_currentFootprint )
    {
        GetView()->Remove( m_currentFootprint.get() );
        GetView()->Clear();
        m_currentFootprint->SetParent( nullptr );
    }
}


const COLOR4D& FOOTPRINT_PREVIEW_PANEL::GetBackgroundColor()
{
    KIGFX::PAINTER* painter = GetView()->GetPainter();
    auto settings = static_cast<KIGFX::PCB_RENDER_SETTINGS*>( painter->GetSettings() );

    return settings->GetBackgroundColor();
}


const COLOR4D& FOOTPRINT_PREVIEW_PANEL::GetForegroundColor()
{
    KIGFX::PAINTER* painter = GetView()->GetPainter();
    auto settings = static_cast<KIGFX::PCB_RENDER_SETTINGS*>( painter->GetSettings() );

    return settings->GetCursorColor();
}


void FOOTPRINT_PREVIEW_PANEL::renderFootprint( std::shared_ptr<FOOTPRINT> aFootprint )
{
    if( m_currentFootprint )
    {
        GetView()->Remove( m_currentFootprint.get() );
        GetView()->Clear();
        m_currentFootprint->SetParent( nullptr );
    }

    m_currentFootprint = aFootprint;

    if( !m_currentFootprint )
        return;

    m_currentFootprint->SetParent( m_dummyBoard.get() );

    // Ensure we are not using the high contrast mode to display the selected footprint
    KIGFX::PAINTER* painter = GetView()->GetPainter();
    auto settings = static_cast<KIGFX::PCB_RENDER_SETTINGS*>( painter->GetSettings() );
    settings->SetContrastModeDisplay( HIGH_CONTRAST_MODE::NORMAL );

    GetView()->Add( m_currentFootprint.get() );
    GetView()->SetVisible( m_currentFootprint.get(), true );
    GetView()->Update( m_currentFootprint.get(), KIGFX::ALL );

    BOX2I bbox = m_currentFootprint->ViewBBox();
    bbox.Merge( m_currentFootprint->Value().ViewBBox() );
    bbox.Merge( m_currentFootprint->Reference().ViewBBox() );

    if( bbox.GetSize().x > 0 && bbox.GetSize().y > 0 )
    {
        // Autozoom
        GetView()->SetViewport( BOX2D( bbox.GetOrigin(), bbox.GetSize() ) );

        // Add a margin
        GetView()->SetScale( GetView()->GetScale() * 0.7 );

        Refresh();
    }
}


bool FOOTPRINT_PREVIEW_PANEL::DisplayFootprint( const LIB_ID& aFPID )
{
    FP_LIB_TABLE* fptbl = Prj().PcbFootprintLibs();

    try
    {
        m_currentFootprint.reset( fptbl->FootprintLoadWithOptionalNickname( aFPID ) );
    }
    catch( ... )
    {
        m_currentFootprint.reset();
    }

    renderFootprint( m_currentFootprint );
    Refresh();

    return m_currentFootprint != nullptr;
}


wxWindow* FOOTPRINT_PREVIEW_PANEL::GetWindow()
{
    return static_cast<wxWindow*>( this );
}


FOOTPRINT_PREVIEW_PANEL* FOOTPRINT_PREVIEW_PANEL::New( KIWAY* aKiway, wxWindow* aParent )
{
    PCBNEW_SETTINGS* cfg = Pgm().GetSettingsManager().GetAppSettings<PCBNEW_SETTINGS>();

    // Currently values read from config file are not used because the user cannot
    // change this config
    // if( cfg->m_Window.grid.sizes.empty() )
    {
        cfg->m_Window.grid.sizes = { "1000 mil",
                                     "500 mil",
                                     "250 mil",
                                     "200 mil",
                                     "100 mil",
                                     "50 mil",
                                     "25 mil",
                                     "20 mil",
                                     "10 mil",
                                     "5 mil",
                                     "2 mil",
                                     "1 mil",
                                     "5.0 mm",
                                     "2.5 mm",
                                     "1.0 mm",
                                     "0.5 mm",
                                     "0.25 mm",
                                     "0.2 mm",
                                     "0.1 mm",
                                     "0.05 mm",
                                     "0.025 mm",
                                     "0.01 mm" };
    }

    // Currently values read from config file are not used because the user cannot
    // change this config
    //if( cfg->m_Window.zoom_factors.empty() )
    {
        cfg->m_Window.zoom_factors = { ZOOM_LIST_PCBNEW };
    }

    std::unique_ptr<KIGFX::GAL_DISPLAY_OPTIONS> gal_opts;

    gal_opts = std::make_unique<KIGFX::GAL_DISPLAY_OPTIONS>();
    gal_opts->ReadConfig( *Pgm().GetCommonSettings(), cfg->m_Window, aParent );

    auto canvasType = static_cast<EDA_DRAW_PANEL_GAL::GAL_TYPE>( cfg->m_Graphics.canvas_type );
    auto panel = new FOOTPRINT_PREVIEW_PANEL( aKiway, aParent, std::move( gal_opts ), canvasType );

    panel->UpdateColors();

    const GRID_SETTINGS& gridCfg = cfg->m_Window.grid;

    panel->GetGAL()->SetGridVisibility( gridCfg.show );

    //Bounds checking cannot include number of elements as an index!
    int gridIdx = std::max( 0, std::min( gridCfg.last_size_idx, (int) gridCfg.sizes.size() - 1 ) );
    int gridSize = (int) ValueFromString( EDA_UNITS::MILS, gridCfg.sizes[ gridIdx ] );
    panel->GetGAL()->SetGridSize( VECTOR2D( gridSize, gridSize ) );

    return panel;
}