/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2015 SoftPLC Corporation, Dick Hollenbeck <dick@softplc.com>
 * Copyright (C) 2015-2022 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
 */

#ifndef SCH_BASE_FRAME_H_
#define SCH_BASE_FRAME_H_

#include <eda_draw_frame.h>
#include <frame_type.h>
#include <sch_draw_panel.h>
#include <sch_screen.h>
#include <schematic_settings.h>

#include <stddef.h>
#include <utility>
#include <vector>
#include <wx/event.h>
#include <wx/fswatcher.h>
#include <wx/datetime.h>
#include <wx/gdicmn.h>
#include <wx/string.h>
#include <wx/timer.h>

#include <template_fieldnames.h>


namespace KIGFX
{
    class SCH_RENDER_SETTINGS;
}

class PAGE_INFO;
class TITLE_BLOCK;
class SYMBOL_VIEWER_FRAME;
class SYMBOL_EDIT_FRAME;
class LIB_SYMBOL;
class SYMBOL_LIB;
class SYMBOL_LIBRARY_FILTER;
class LIB_ID;
class SYMBOL_LIB_TABLE;
class EESCHEMA_SETTINGS;
class SYMBOL_EDITOR_SETTINGS;
class NL_SCHEMATIC_PLUGIN;

/**
 * Load symbol from symbol library table.
 *
 * Check the symbol library table for the part defined by \a aLibId and optionally
 * check the optional cache library.
 *
 * @param aLibId is the symbol library identifier to load.
 * @param aLibTable is the #SYMBOL_LIBRARY_TABLE to load the alias from.
 * @param aCacheLib is an optional cache library.
 * @param aParent is an optional parent window when displaying an error message.
 * @param aShowErrorMessage set to true to show any error messages.
 *
 * @return The symbol found in the library or NULL if the symbol was not found.
 */
LIB_SYMBOL* SchGetLibSymbol( const LIB_ID& aLibId, SYMBOL_LIB_TABLE* aLibTable,
                             SYMBOL_LIB* aCacheLib = nullptr, wxWindow* aParent = nullptr,
                             bool aShowErrorMsg = false );

/**
 * A shim class between EDA_DRAW_FRAME and several derived classes:
 * SYMBOL_EDIT_FRAME, SYMBOL_VIEWER_FRAME, and SCH_EDIT_FRAME, and it brings in a
 * common way of handling the provided virtual functions for the derived classes.
 *
 * The motivation here is to switch onto GetScreen() for the underlying data model.
 *
 * @author Dick Hollenbeck
 */
class SCH_BASE_FRAME : public EDA_DRAW_FRAME
{
public:
    SCH_BASE_FRAME( KIWAY* aKiway, wxWindow* aParent, FRAME_T aWindowType, const wxString& aTitle,
                    const wxPoint& aPosition, const wxSize& aSize, long aStyle,
                    const wxString & aFrameName );

    virtual ~SCH_BASE_FRAME();

    void createCanvas();

    SCH_DRAW_PANEL* GetCanvas() const override;
    SCH_SCREEN* GetScreen() const override;

    EESCHEMA_SETTINGS* eeconfig() const;

    SYMBOL_EDITOR_SETTINGS* libeditconfig() const;

    void LoadSettings( APP_SETTINGS_BASE* aCfg ) override;
    void SaveSettings( APP_SETTINGS_BASE* aCfg ) override;

    KIGFX::SCH_RENDER_SETTINGS* GetRenderSettings();

    COLOR4D GetDrawBgColor() const override;

    /**
     * Allow some frames to show/hide hidden pins.  The default impl shows all pins.
     */
    virtual bool GetShowAllPins() const { return true; }

    void SetPageSettings( const PAGE_INFO& aPageSettings ) override;
    const PAGE_INFO& GetPageSettings () const override;
    const VECTOR2I   GetPageSizeIU() const override;

    const VECTOR2I& GetGridOrigin() const override
    {
        static VECTOR2I zero;
        return zero;
    }
    void SetGridOrigin( const VECTOR2I& aPoint ) override {}

    const TITLE_BLOCK& GetTitleBlock() const override;
    void SetTitleBlock( const TITLE_BLOCK& aTitleBlock ) override;

    void UpdateStatusBar() override;

    /**
     * Call the library viewer to select symbol to import into schematic.
     * If the library viewer is currently running, it is closed and reopened in modal mode.
     *
     * aAllowFields chooses whether or not features that permit the user to edit fields
     * (e.g. footprint selection) should be enabled. This should be false when they would
     * have no effect, for example loading a part into symbol_editor.
     *
     * @param aFilter is an optional #SYMBOL_LIBRARY_FILTER filter to pass the allowed library names
     *                and/or the library name to load the symbol from and/or some other filter
     * @param aHistoryList is the list of previously loaded symbols - will be edited
     * @param aHighlight is the name of symbol to highlight in the list.
     *                   highlights none if there isn't one by that name.
     * @param aShowFootprints is the whether to show footprints in the dialog.
     * @param aAllowFields is whether to allow field editing in the dialog.
     *
     * @return the selected symbol
     */
    PICKED_SYMBOL PickSymbolFromLibrary( const SYMBOL_LIBRARY_FILTER* aFilter,
                                         std::vector<PICKED_SYMBOL>&  aHistoryList,
                                         std::vector<PICKED_SYMBOL>&  aAlreadyPlaced,
                                         bool aShowFootprints, const LIB_ID* aHighlight = nullptr,
                                         bool aAllowFields = true );

    /**
     * Load symbol from symbol library table.
     *
     * @param aLibId is the symbol library identifier to load.
     * @param aUseCacheLib set to true to fall back to cache library if symbol is not found in
     *                     symbol library table.
     * @param aShowErrorMessage set to true to show any error messages.
     * @return The symbol found in the library or NULL if the symbol was not found.
     */
    LIB_SYMBOL* GetLibSymbol( const LIB_ID& aLibId, bool aUseCacheLib = false,
                              bool aShowErrorMsg = false );

    /**
     * Display a list of loaded libraries and allows the user to select a library.
     *
     * This list is sorted, with the library cache always at end of the list
     *
     * @return the library nickname used in the symbol library table.
     */
    wxString SelectLibraryFromList();

    /**
     * Display a dialog asking the user to select a symbol library table.
     *
     * @param aOptional if set the Cancel button will be relabelled "Skip".
     * @return Pointer to the selected symbol library table or nullptr if canceled.
     */
    SYMBOL_LIB_TABLE* SelectSymLibTable( bool aOptional = false );

    virtual void RedrawScreen( const VECTOR2I& aCenterPoint, bool aWarpPointer );

    void HardRedraw() override;

    /**
     * Add an item to the screen (and view)
     * aScreen is the screen the item is located on, if not the current screen
     */
    void AddToScreen( EDA_ITEM* aItem, SCH_SCREEN* aScreen = nullptr );

    /**
     * Remove an item from the screen (and view)
     * aScreen is the screen the item is located on, if not the current screen
     */
    void RemoveFromScreen( EDA_ITEM* aItem, SCH_SCREEN* aScreen );

    /**
     * Mark an item for refresh.
     */
    virtual void UpdateItem( EDA_ITEM* aItem, bool isAddOrDelete = false,
                             bool aUpdateRtree = false );

    /**
     * Mark selected items for refresh.
     */
    void RefreshZoomDependentItems();

    /**
     * Mark all items for refresh.
     */
    void SyncView();

    void CommonSettingsChanged( bool aEnvVarsChanged, bool aTextVarsChanged ) override;

    /**
     * Helper to retrieve a layer color from the global color settings
     */
    COLOR4D GetLayerColor( SCH_LAYER_ID aLayer );

    COLOR_SETTINGS* GetColorSettings( bool aForceRefresh = false ) const override;

    void ActivateGalCanvas() override;

    /**
     * Handler for Symbol change events.  Responds to the filesystem watcher set in #setSymWatcher.
    */
    void OnSymChange( wxFileSystemWatcherEvent& aEvent );

    /**
     * Handler for the filesystem watcher debounce timer.
     */
    void OnSymChangeDebounceTimer( wxTimerEvent& aEvent );

protected:
    void handleActivateEvent( wxActivateEvent& aEvent ) override;

    void handleIconizeEvent( wxIconizeEvent& aEvent ) override;

    /**
     * Save Symbol Library Tables to disk.
     *
     * @param aGlobal when true, the Global Table is saved.
     * @param aProject when true, the Project Table is saved.
     * @return True when all requested actions succeeded.
     */
    bool saveSymbolLibTables( bool aGlobal, bool aProject );

    /**
     * Creates (or removes) a watcher on the specified symbol library
     * @param aSymbol If nullptr, the watcher is removed.  Otherwise, set a change watcher
     */
    void setSymWatcher( const LIB_ID* aSymbol );

    /// These are only used by symbol_editor.  Eeschema should be using the one inside
    /// the SCHEMATIC.
    SCHEMATIC_SETTINGS  m_base_frame_defaults;

private:

    /// These are file watchers for the symbol library tables.
    std::unique_ptr<wxFileSystemWatcher>    m_watcher;
    wxFileName                              m_watcherFileName;
    wxDateTime                              m_watcherLastModified;
    wxTimer                                 m_watcherDebounceTimer;

    NL_SCHEMATIC_PLUGIN* m_spaceMouse;
};

#endif // SCH_BASE_FRAME_H_