/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2024 3Dconnexion
 * Copyright The 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 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 "nl_pl_editor_plugin_impl.h"

// KiCAD includes
#include <gal/graphics_abstraction_layer.h>
#include <pl_editor_frame.h>
#include <bitmaps.h>
#include <class_draw_panel_gal.h>
#include <view/view.h>
#include <view/wx_view_controls.h>
#include <tool/action_manager.h>
#include <tool/tool_action.h>
#include <tool/tool_manager.h>

// stdlib
#include <list>
#include <map>
#include <memory>
#include <utility>
#include <vector>
#include <cfloat>

#include <wx/log.h>
#include <wx/mstream.h>


/**
 * Flag to enable the NL_PL_EDITOR_PLUGIN debug tracing.
 *
 * Use "KI_TRACE_NL_PL_EDITOR_PLUGIN" to enable.
 *
 * @ingroup trace_env_vars
 */
const wxChar* NL_PL_EDITOR_PLUGIN_IMPL::m_logTrace = wxT( "KI_TRACE_NL_PL_EDITOR_PLUGIN" );


NL_PL_EDITOR_PLUGIN_IMPL::NL_PL_EDITOR_PLUGIN_IMPL() : CNavigation3D( false, false )
{
    PutProfileHint( "KiCAD Datasheet Editor" );
}


NL_PL_EDITOR_PLUGIN_IMPL::~NL_PL_EDITOR_PLUGIN_IMPL()
{
    std::error_code m_errCode;
    EnableNavigation( false, m_errCode );
    if( m_errCode.value() != 0 )
    {
        wxLogTrace( wxT( "KI_TRACE_NAVLIB" ),
                    wxT( "Error occured when calling EnableNavigation. Error code: %d" ),
                    m_errCode.value() );
    }
}


void NL_PL_EDITOR_PLUGIN_IMPL::SetCanvas( EDA_DRAW_PANEL_GAL* aViewport )
{
    m_viewport2D = aViewport;

    if( m_viewport2D == nullptr )
    {
        return;
    }

    m_view = m_viewport2D->GetView();

    if( m_view == nullptr )
    {
        return;
    }

    m_viewportWidth = m_view->GetBoundary().GetWidth();

    if( !IsEnabled() )
    {
        // Use the default settings for the connexion to the 3DMouse navigation
        // They are use a single-threaded threading model and row vectors.
        EnableNavigation( true );

        // Use the SpaceMouse internal timing source for the frame rate.
        PutFrameTimingSource( TimingSource::SpaceMouse );

        exportCommandsAndImages();
    }
}


void NL_PL_EDITOR_PLUGIN_IMPL::SetFocus( bool aFocus )
{
    wxLogTrace( m_logTrace, wxT( "NL_PL_EDITOR_PLUGIN_IMPL::SetFocus %d" ), aFocus );
    NAV_3D::Write( navlib::focus_k, aFocus );
}

// temporary store for the command categories
using CATEGORY_STORE = std::map<std::string, TDx::CCommandTreeNode*, std::less<>>;


/**
 * Add a category to the store.
 *
 * The function adds category paths of the format "A.B" where B is a sub-category of A.
 *
 * @param aCategoryPath is the std::string representation of the category.
 * @param aCategoryStore is the CATEGORY_STORE instance to add to.
 */
static void add_category( const std::string& aCategoryPath, CATEGORY_STORE& aCategoryStore )
{
    using TDx::SpaceMouse::CCategory;

    auto parent_iter = aCategoryStore.begin();
    std::string::size_type pos = aCategoryPath.find_last_of( '.' );

    if( pos != std::string::npos )
    {
        std::string parentPath = aCategoryPath.substr( 0, pos );

        if( !aCategoryStore.contains( parentPath ) )
        {
            add_category( parentPath, aCategoryStore );
            parent_iter = aCategoryStore.find( parentPath );
        }
    }

    std::string name = aCategoryPath.substr( pos + 1 );
    auto categoryNode = std::make_unique<CCategory>( aCategoryPath.c_str(), name.c_str() );

    aCategoryStore.try_emplace( aCategoryStore.end(), aCategoryPath, categoryNode.get() );

    if( parent_iter != aCategoryStore.end() )
        parent_iter->second->push_back( std::move( categoryNode ) );
}


/**
 * add_category wrapper.
 *
 * Function checks if path exists in the category and adds it if it doesn't.
 *
 * @param aCategoryPath is the std::string representation of the category.
 * @param aCategoryStore is the CATEGORY_STORE instance to add to.
 */
static void try_add_category( const std::string& aCategoryPath, CATEGORY_STORE& aCategoryStore )
{
    if( !aCategoryStore.contains( aCategoryPath ) )
    {
        add_category( aCategoryPath, aCategoryStore );
    }
}


void NL_PL_EDITOR_PLUGIN_IMPL::exportCommandsAndImages()
{
    wxLogTrace( m_logTrace, wxT( "NL_PL_EDITOR_PLUGIN_IMPL::exportCommandsAndImages" ) );

    std::list<TOOL_ACTION*> actions = ACTION_MANAGER::GetActionList();

    if( actions.empty() )
        return;

    using TDx::SpaceMouse::CCommand;
    using TDx::SpaceMouse::CCommandSet;

    // The root action set node
    CCommandSet commandSet( "PL_EDITOR", "Drawing Sheet Editor" );

    // Activate the command set
    NAV_3D::PutActiveCommands( commandSet.GetId() );

    // temporary store for the categories initialized with action set
    CATEGORY_STORE categoryStore{ CATEGORY_STORE::value_type( ".", &commandSet ) };

    std::vector<TDx::CImage> vImages;

    for( const auto action : actions )
    {
        std::string label = action->GetMenuLabel().ToStdString();

        if( label.empty() )
            continue;

        std::string name = action->GetName();

        // Do no export commands for the 3DViewer app.

        if( name.rfind( "3DViewer.", 0 ) == 0 )
            continue;

        std::string strCategory = action->GetToolName();
        std::string description = action->GetDescription().ToStdString();

        try_add_category( strCategory, categoryStore );
        CATEGORY_STORE::iterator iter = categoryStore.find( strCategory );

        // Arbitrary 8-bit data stream
        wxMemoryOutputStream imageStream;

        if( action->GetIcon() != BITMAPS::INVALID_BITMAP )
        {
            wxImage image = KiBitmap( action->GetIcon() ).ConvertToImage();
            image.SaveFile( imageStream, wxBitmapType::wxBITMAP_TYPE_PNG );
            image.Destroy();

            if( imageStream.GetSize() )
            {
                const wxStreamBuffer* streamBuffer = imageStream.GetOutputStreamBuffer();
                TDx::CImage tdxImage = TDx::CImage::FromData( "", 0, name.c_str() );
                tdxImage.AssignImage(
                        std::string( std::bit_cast<const char*>( streamBuffer->GetBufferStart() ),
                                     streamBuffer->GetBufferSize() ),
                        0 );

                wxLogTrace( m_logTrace, wxT( "Adding image for : %s" ), name );
                vImages.push_back( std::move( tdxImage ) );
            }
        }

        wxLogTrace( m_logTrace, wxT( "Inserting command: %s,  description: %s,  in category:  %s" ),
                    name, description, iter->first );

        iter->second->push_back(
                CCommand( std::move( name ), std::move( label ), std::move( description ) ) );
    }

    NAV_3D::AddCommandSet( commandSet );
    NAV_3D::AddImages( vImages );
}


long NL_PL_EDITOR_PLUGIN_IMPL::GetCameraMatrix( navlib::matrix_t& matrix ) const
{
    if( m_view == nullptr )
        return navlib::make_result_code( navlib::navlib_errc::no_data_available );

    m_viewPosition = m_view->GetCenter();

    double x = m_view->IsMirroredX() ? -1 : 1;
    double y = m_view->IsMirroredY() ? 1 : -1;

    // x * y * z = 1 for a right-handed coordinate system.
    double z = x * y;

    // Note: the connexion has been configured as row vectors, the coordinate system is defined in
    // NL_PL_EDITOR_PLUGIN_IMPL::GetCoordinateSystem and the front view in NL_PL_EDITOR_PLUGIN_IMPL::GetFrontView.
    matrix = { { { x, 0, 0, 0, 0, y, 0, 0, 0, 0, z, 0, m_viewPosition.x, m_viewPosition.y, 0,
                   1 } } };
    return 0;
}


long NL_PL_EDITOR_PLUGIN_IMPL::GetPointerPosition( navlib::point_t& position ) const
{
    if( m_view == nullptr )
        return navlib::make_result_code( navlib::navlib_errc::no_data_available );

    VECTOR2D mouse_pointer = m_viewport2D->GetViewControls()->GetMousePosition();

    position.x = mouse_pointer.x;
    position.y = mouse_pointer.y;
    position.z = 0;

    return 0;
}


long NL_PL_EDITOR_PLUGIN_IMPL::GetViewExtents( navlib::box_t& extents ) const
{
    if( m_view == nullptr )
        return navlib::make_result_code( navlib::navlib_errc::no_data_available );

    double scale = m_viewport2D->GetGAL()->GetWorldScale();
    BOX2D  box = m_view->GetViewport();

    m_viewportWidth = box.GetWidth();

    extents.min_x = -box.GetWidth() / 2.0;
    extents.min_y = -box.GetHeight() / 2.0;
    extents.min_z = m_viewport2D->GetGAL()->GetMinDepth() / scale;
    extents.max_x = box.GetWidth() / 2.0;
    extents.max_y = box.GetHeight() / 2.0;
    extents.max_z = m_viewport2D->GetGAL()->GetMaxDepth() / scale;
    return 0;
}


long NL_PL_EDITOR_PLUGIN_IMPL::GetIsViewPerspective( navlib::bool_t& perspective ) const
{
    perspective = false;

    return 0;
}


long NL_PL_EDITOR_PLUGIN_IMPL::SetCameraMatrix( const navlib::matrix_t& matrix )
{
    if( m_view == nullptr )
        return navlib::make_result_code( navlib::navlib_errc::invalid_operation );

    long result = 0;
    VECTOR2D viewPos( matrix.m4x4[3][0], matrix.m4x4[3][1] );

    if( !equals( m_view->GetCenter(), m_viewPosition,
                 static_cast<VECTOR2D::coord_type>( FLT_EPSILON ) ) )
    {
        m_view->SetCenter( viewPos + m_view->GetCenter() - m_viewPosition );
        result = navlib::make_result_code( navlib::navlib_errc::error );
    }
    else
    {
        m_view->SetCenter( viewPos );
    }

    m_viewPosition = viewPos;

    return result;
}


long NL_PL_EDITOR_PLUGIN_IMPL::SetViewExtents( const navlib::box_t& extents )
{
    if( m_view == nullptr )
        return navlib::make_result_code( navlib::navlib_errc::invalid_operation );

    long result = 0;

    if( m_viewportWidth != m_view->GetViewport().GetWidth() )
        result = navlib::make_result_code( navlib::navlib_errc::error );

    double width = m_viewportWidth;
    m_viewportWidth = extents.max_x - extents.min_x;

    double scale = width / m_viewportWidth * m_view->GetScale();
    m_view->SetScale( scale, m_view->GetCenter() );

    if( !equals( m_view->GetScale(), scale, static_cast<double>( FLT_EPSILON ) ) )
        result = navlib::make_result_code( navlib::navlib_errc::error );

    return result;
}


long NL_PL_EDITOR_PLUGIN_IMPL::SetViewFOV( double fov )
{
    return navlib::make_result_code( navlib::navlib_errc::invalid_operation );
}


long NL_PL_EDITOR_PLUGIN_IMPL::SetViewFrustum( const navlib::frustum_t& frustum )
{
    return navlib::make_result_code( navlib::navlib_errc::invalid_operation );
}


long NL_PL_EDITOR_PLUGIN_IMPL::GetModelExtents( navlib::box_t& extents ) const
{
    if( m_view == nullptr )
        return navlib::make_result_code( navlib::navlib_errc::no_data_available );

    BOX2I box = static_cast<PL_EDITOR_FRAME*>( m_viewport2D->GetParent() )->GetDocumentExtents();
    box.Normalize();

    double half_depth = 0.1 / m_viewport2D->GetGAL()->GetWorldScale();

    if( box.GetWidth() == 0 && box.GetHeight() == 0 )
        half_depth = 0;

    extents.min_x = static_cast<double>( box.GetOrigin().x );
    extents.min_y = static_cast<double>( box.GetOrigin().y );
    extents.min_z = -half_depth;
    extents.max_x = static_cast<double>( box.GetEnd().x );
    extents.max_y = static_cast<double>( box.GetEnd().y );
    extents.max_z = half_depth;

    return 0;
}


long NL_PL_EDITOR_PLUGIN_IMPL::GetCoordinateSystem( navlib::matrix_t& matrix ) const
{
    // The coordinate system is defined as x to the right, y down and z into the screen.
    matrix = { { { 1, 0, 0, 0, 0, -1, 0, 0, 0, 0, -1, 0, 0, 0, 0, 1 } } };
    return 0;
}


long NL_PL_EDITOR_PLUGIN_IMPL::GetFrontView( navlib::matrix_t& matrix ) const
{
    matrix = { { { 1, 0, 0, 0, 0, -1, 0, 0, 0, 0, -1, 0, 0, 0, 0, 1 } } };
    return 0;
}


long NL_PL_EDITOR_PLUGIN_IMPL::GetIsSelectionEmpty( navlib::bool_t& empty ) const
{
    empty = true;
    return 0;
}


long NL_PL_EDITOR_PLUGIN_IMPL::GetIsViewRotatable( navlib::bool_t& isRotatable ) const
{
    isRotatable = false;
    return 0;
}


long NL_PL_EDITOR_PLUGIN_IMPL::SetActiveCommand( std::string commandId )
{
    if( commandId.empty() )
        return 0;

    if( m_viewport2D == nullptr )
        return navlib::make_result_code( navlib::navlib_errc::invalid_operation );

    wxWindow* parent = m_viewport2D->GetParent();

    // Only allow command execution if the window is enabled. i.e. there is not a modal dialog
    // currently active.
    if( !parent || !parent->IsEnabled() )
        return navlib::make_result_code( navlib::navlib_errc::invalid_operation );

    TOOLS_HOLDER* tools_holder = dynamic_cast<TOOLS_HOLDER*>( parent );
    TOOL_MANAGER* tool_manager = tools_holder ? tools_holder->GetToolManager() : nullptr;

    // Only allow for command execution if the tool manager is accessible.
    if( !tool_manager )
        return navlib::make_result_code( navlib::navlib_errc::invalid_operation );

    for( std::list<TOOL_ACTION*> actions = ACTION_MANAGER::GetActionList(); const auto action : actions )
    {
        if( action == nullptr )
            continue;

        if( commandId == action->GetName() )
        {
            // Get the selection to use to test if the action is enabled
            const SELECTION& sel = tool_manager->GetToolHolder()->GetCurrentSelection();

            const ACTION_CONDITIONS* aCond = tool_manager->GetActionManager()->GetCondition( *action );

            if( aCond == nullptr )
                return navlib::make_result_code( navlib::navlib_errc::invalid_operation );

            aCond->enableCondition( sel );
            tool_manager->RunAction( *action );
            break;
        }
    }

    return 0;
}


long NL_PL_EDITOR_PLUGIN_IMPL::SetSettingsChanged( long change )
{
    return 0;
}


long NL_PL_EDITOR_PLUGIN_IMPL::SetMotionFlag( bool value )
{
    m_isMoving = value;

    return 0;
}


long NL_PL_EDITOR_PLUGIN_IMPL::SetTransaction( long value )
{
    if( value == 0L )
        m_viewport2D->ForceRefresh();

    return 0;
}


long NL_PL_EDITOR_PLUGIN_IMPL::GetViewFOV( double& fov ) const
{
    return navlib::make_result_code( navlib::navlib_errc::invalid_operation );
}


long NL_PL_EDITOR_PLUGIN_IMPL::GetViewFrustum( navlib::frustum_t& frustum ) const
{
    return navlib::make_result_code( navlib::navlib_errc::invalid_operation );
}


long NL_PL_EDITOR_PLUGIN_IMPL::GetSelectionExtents( navlib::box_t& extents ) const
{
    return navlib::make_result_code( navlib::navlib_errc::no_data_available );
}


long NL_PL_EDITOR_PLUGIN_IMPL::GetSelectionTransform( navlib::matrix_t& transform ) const
{
    return navlib::make_result_code( navlib::navlib_errc::no_data_available );
}


long NL_PL_EDITOR_PLUGIN_IMPL::SetSelectionTransform( const navlib::matrix_t& matrix )
{
    return navlib::make_result_code( navlib::navlib_errc::invalid_operation );
}


long NL_PL_EDITOR_PLUGIN_IMPL::GetPivotPosition( navlib::point_t& position ) const
{
    return navlib::make_result_code( navlib::navlib_errc::invalid_operation );
}


long NL_PL_EDITOR_PLUGIN_IMPL::IsUserPivot( navlib::bool_t& userPivot ) const
{
    return navlib::make_result_code( navlib::navlib_errc::invalid_operation );
}


long NL_PL_EDITOR_PLUGIN_IMPL::SetPivotPosition( const navlib::point_t& position )
{
    return navlib::make_result_code( navlib::navlib_errc::invalid_operation );
}


long NL_PL_EDITOR_PLUGIN_IMPL::GetPivotVisible( navlib::bool_t& visible ) const
{
    return navlib::make_result_code( navlib::navlib_errc::invalid_operation );
}


long NL_PL_EDITOR_PLUGIN_IMPL::SetPivotVisible( bool visible )
{
    return navlib::make_result_code( navlib::navlib_errc::invalid_operation );
}


long NL_PL_EDITOR_PLUGIN_IMPL::GetHitLookAt( navlib::point_t& position ) const
{
    return navlib::make_result_code( navlib::navlib_errc::no_data_available );
}


long NL_PL_EDITOR_PLUGIN_IMPL::SetHitAperture( double aperture )
{
    return navlib::make_result_code( navlib::navlib_errc::invalid_operation );
}


long NL_PL_EDITOR_PLUGIN_IMPL::SetHitDirection( const navlib::vector_t& direction )
{
    return navlib::make_result_code( navlib::navlib_errc::invalid_operation );
}


long NL_PL_EDITOR_PLUGIN_IMPL::SetHitLookFrom( const navlib::point_t& eye )
{
    return navlib::make_result_code( navlib::navlib_errc::invalid_operation );
}


long NL_PL_EDITOR_PLUGIN_IMPL::SetHitSelectionOnly( bool onlySelection )
{
    return navlib::make_result_code( navlib::navlib_errc::invalid_operation );
}


long NL_PL_EDITOR_PLUGIN_IMPL::SetCameraTarget( const navlib::point_t& position )
{
    return navlib::make_result_code( navlib::navlib_errc::invalid_operation );
}