/*
 * 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) 2008-2017 Wayne Stambaugh <stambaughw@verizon.net>
 * Copyright (C) 2004-2017 KiCad Developers, see change_log.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 class_library.h
 * @brief Definition for part library class.
 */

#ifndef CLASS_LIBRARY_H
#define CLASS_LIBRARY_H

#include <wx/filename.h>

#include <class_libentry.h>
#include <sch_io_mgr.h>

#include <project.h>

#include <map>

class LIB_ID;
class LINE_READER;
class OUTPUTFORMATTER;
class SCH_LEGACY_PLUGIN;
class SCH_PLUGIN;


#define DOC_EXT           "dcm"

/*
 * Part Library version and file header  macros.
 */
#define LIB_VERSION_MAJOR 2
#define LIB_VERSION_MINOR 3

/* Must be the first line of part library (.lib) files. */
#define LIBFILE_IDENT     "EESchema-LIBRARY Version"

#define LIB_VERSION( major, minor ) ( major * 100 + minor )

#define IS_LIB_CURRENT_VERSION( major, minor )              \
    (                                                       \
        LIB_VERSION( major1, minor1 ) ==                    \
        LIB_VERSION( LIB_VERSION_MAJOR, LIB_VERSION_MINOR)  \
    )

/*
 * Library versions 2.3 and lower use the old separate library (.lib) and
 * document (.dcm) files.  Part libraries after 2.3 merged the library
 * and document files into a single library file.  This macro checks if the
 * library version supports the old format
 */
#define USE_OLD_DOC_FILE_FORMAT( major, minor )                 \
    ( LIB_VERSION( major, minor ) <= LIB_VERSION( 2, 3 ) )

// Helper class to filter a list of libraries, and/or a list of PART_LIB
// in dialogs
class SCHLIB_FILTER
{
    wxArrayString m_allowedLibs;        ///< a list of lib names to list some libraries
                                        ///< if empty: no filter
    bool          m_filterPowerParts;   ///< true to filter (show only) power parts
    bool          m_forceLoad;          // When true, load a part lib from the lib
                                        // which is given in m_allowedLibs[0]

public:
    SCHLIB_FILTER()
    {
        m_filterPowerParts = false;
        m_forceLoad = false;
    }

    /**
     * add a lib name to the allowed libraries
     */
    void AddLib( const wxString& aLibName )
    {
        m_allowedLibs.Add( aLibName );
        m_forceLoad = false;
    }


    /**
     * add a lib name to the allowed libraries
     */
    void LoadFrom( const wxString& aLibName )
    {
        m_allowedLibs.Clear();
        m_allowedLibs.Add( aLibName );
        m_forceLoad = true;
    }

    /**
     * Clear the allowed libraries list (allows all libs)
     */
    void ClearLibList()
    {
        m_allowedLibs.Clear();
        m_forceLoad = false;
    }

    /**
     * set the filtering of power parts
     */
    void FilterPowerParts( bool aFilterEnable )
    {
        m_filterPowerParts = aFilterEnable;
    }

    // Accessors

    /**
     * Function GetFilterPowerParts
     * @return true if the filtering of power parts is on
     */
    bool GetFilterPowerParts() const { return m_filterPowerParts; }


    /**
     * Function GetAllowedLibList
     * @return am wxArrayString of the names of allowed libs
     */
    const wxArrayString& GetAllowedLibList() const { return m_allowedLibs; }

    /**
     * Function GetLibSource
     * @return the name of the lib to use to load a part, or an a empty string
     * Useful to load (in lib editor or lib viewer) a part from a given library
     */
    const wxString& GetLibSource() const
    {
        static wxString dummy;

        if( m_forceLoad && m_allowedLibs.GetCount() > 0 )
            return m_allowedLibs[0];
        else
            return dummy;
    }
};


/* Helpers for creating a list of part libraries. */
class PART_LIB;
class wxRegEx;

/**
 * LIB_ALIAS map sorting.
 */
struct AliasMapSort
{
    bool operator() ( const wxString& aItem1, const wxString& aItem2 ) const
    {
        return aItem1 < aItem2;
    }
};

/// Alias map used by part library object.

typedef std::map< wxString, LIB_ALIAS*, AliasMapSort >  LIB_ALIAS_MAP;
typedef std::vector< LIB_ALIAS* >                       LIB_ALIASES;
typedef boost::ptr_vector< PART_LIB >                   PART_LIBS_BASE;


/**
 * Class PART_LIBS
 * is a collection of PART_LIBs.  It extends from PROJECT::_ELEM so it can be
 * hung in the PROJECT.  It does not use any UI calls, but rather simply throws
 * an IO_ERROR when there is a problem.
 */
class PART_LIBS : public PART_LIBS_BASE, public PROJECT::_ELEM
{
public:

    static int s_modify_generation;     ///< helper for GetModifyHash()

    PART_LIBS()
    {
        ++s_modify_generation;
    }

    /// Return the modification hash for all libraries.  The value returned
    /// changes on every library modification.
    int GetModifyHash();

    /**
     * Function AddLibrary
     * allocates and adds a part library to the library list.
     *
     * @param aFileName - File name object of part library.
     * @throw IO_ERROR if there's any problem loading.
     */
    PART_LIB* AddLibrary( const wxString& aFileName );

    /**
     * Function AddLibrary
     * inserts a part library into the library list.
     *
     * @param aFileName - File name object of part library.
     * @param aIterator - Iterator to insert library in front of.
     * @return PART_LIB* - the new PART_LIB, which remains owned by this PART_LIBS container.
     * @throw IO_ERROR if there's any problem loading.
     */
    PART_LIB* AddLibrary( const wxString& aFileName, PART_LIBS::iterator& aIterator );

    /**
     * Function LoadAllLibraries
     * loads all of the project's libraries into this container, which should
     * be cleared before calling it.
     */
    void LoadAllLibraries( PROJECT* aProject, bool aShowProgress=true );

    /**
     * Function LibNamesAndPaths
     * either saves or loads the names of the currently configured part libraries
     * (without paths).
     */
    static void LibNamesAndPaths( PROJECT* aProject, bool doSave,
                                  wxString* aPaths, wxArrayString* aNames=NULL );

    /**
     * Function cacheName
     * returns the name of the cache library after potentially fixing it from
     * an older naming scheme.  That is, the old file is renamed if needed.
     * @param aFullProjectFilename - the *.pro filename with absolute path.
     */
    static const wxString CacheName( const wxString& aFullProjectFilename );

    /**
     * Function FindLibrary
     * finds a part library by \a aName.
     *
     * @param aName - Library file name without path or extension to find.
     * @return Part library if found, otherwise NULL.
     */
    PART_LIB* FindLibrary( const wxString& aName );

    PART_LIB* FindLibraryByFullFileName( const wxString& aFullFileName );

    /**
     * Function GetLibraryNames
     * returns the list of part library file names without path and extension.
     *
     * @param aSorted - Sort the list of name if true.  Otherwise use the
     *                  library load order.
     * @return The list of library names.
     */
    wxArrayString GetLibraryNames( bool aSorted = true );

    /**
     * Function FindLibPart
     * searches all libraries in the list for a part.
     *
     * A part object will always be returned.  If the entry found
     * is an alias.  The root part will be found and returned.
     *
     * @param aLibId - The #LIB_ID of the symbol to search for.
     * @param aLibraryName - Name of the library to search for part.
     * @return LIB_PART* - The part object if found, otherwise NULL.
     */
    LIB_PART* FindLibPart( const LIB_ID& aLibId, const wxString& aLibraryName = wxEmptyString );

    /**
     * Function FindLibraryEntry
     * searches all libraries in the list for an entry.
     *
     * The object can be either a part or an alias.
     *
     * @param aLibId - The library indentifaction of entry to search for (case sensitive).
     * @param aLibraryName - Name of the library to search.
     * @return The entry object if found, otherwise NULL.
     */
    LIB_ALIAS* FindLibraryAlias( const LIB_ID& aLibId,
                                 const wxString& aLibraryName = wxEmptyString );

    /**
     * Function FindLibraryNearEntries
     * Searches all libraries in the list for an entry, using a case insensitive comparison.
     * Helper function used in dialog to find all candidates.
     * During a long time, eeschema was using a case insensitive search.
     * Therefore, for old schematics (<= 2013), or libs, for some components,
     * the chip name (name of alias in lib) can be broken.
     * This function can be used to display a list of candidates, in component properties dialog.
     *
     * @param aEntryName - Name of entries to search for (case insensitive).
     * @param aLibraryName - Name of the library to search.
     * @param aCandidates - a std::vector to store candidates
     */
    void FindLibraryNearEntries( std::vector<LIB_ALIAS*>& aCandidates, const wxString& aEntryName,
                                 const wxString& aLibraryName = wxEmptyString );

    int GetLibraryCount() { return size(); }
};


/**
 * Class PART_LIB
 * is used to load, save, search, and otherwise manipulate
 * part library files.
 */
class PART_LIB
{
    int             type;           ///< Library type indicator.
    wxFileName      fileName;       ///< Library file name.
    wxDateTime      timeStamp;      ///< Library save time and date.
    int             versionMajor;   ///< Library major version number.
    int             versionMinor;   ///< Library minor version number.
    wxString        header;         ///< first line of loaded library.
    bool            isModified;     ///< Library modification status.
    int             m_mod_hash;     ///< incremented each time library is changed.

    SCH_IO_MGR::SCH_FILE_T        m_pluginType;
    std::unique_ptr< SCH_PLUGIN > m_plugin;
    std::unique_ptr< PROPERTIES > m_properties;   ///< Library properties

public:
    PART_LIB( int aType, const wxString& aFileName,
              SCH_IO_MGR::SCH_FILE_T aPluginType = SCH_IO_MGR::SCH_LEGACY );
    ~PART_LIB();

    /**
     * @return a magic number that changes if the library has changed
     */
    int GetModHash() const { return m_mod_hash; }

    SCH_IO_MGR::SCH_FILE_T GetPluginType() const { return m_pluginType; }

    void SetPluginType( SCH_IO_MGR::SCH_FILE_T aPluginType );

    void Create( const wxString& aFileName = wxEmptyString );

    void SetFileName( const wxString& aFileName ) { fileName = aFileName; }

    /**
     * Get library entry status.
     *
     * @return True if there are no entries in the library.
     */
    bool IsEmpty() const
    {
        return m_plugin->GetSymbolLibCount( fileName.GetFullPath() ) == 0;
    }

    /**
     * Function GetCount
     * returns the number of entries in the library.
     *
     * @return The number of part and alias entries.
     */
    int GetCount() const
    {
        return (int) m_plugin->GetSymbolLibCount( fileName.GetFullPath() );
    }

    bool IsModified() const
    {
        return isModified;
    }

    bool IsCache() const;

    void SetCache();

    bool IsBuffering() const;

    void EnableBuffering( bool aEnable = true );

    void Save( bool aSaveDocFile = true );

    /**
     * Function IsReadOnly
     * @return true if current user does not have write access to the library file.
     */
    bool IsReadOnly() const { return !fileName.IsFileWritable(); }

    /**
     * Load a string array with the names of all the entries in this library.
     *
     * @param aNames - String array to place entry names into.
     */
    void GetAliasNames( wxArrayString& aNames );

    /**
     * Load a vector with all the entries in this library.
     *
     * @param aAliases - vector to receive the aliases.
     */
    void GetAliases( std::vector<LIB_ALIAS*>& aAliases );

    /**
     * Load a string array with the names of  entries of type POWER in this library.
     *
     * @param aNames - String array to place entry names into.
     */
    void GetEntryTypePowerNames( wxArrayString& aNames );

    /**
     * Find #LIB_ALIAS by \a aName.
     *
     * @param aName - Name of entry, case sensitive.
     * @return #LIB_ALIAS* if found.  NULL if not found.
     */
    LIB_ALIAS* FindAlias( const wxString& aName );

    /**
     * Find part by \a aName.
     *
     * This is a helper for FindEntry so casting a LIB_ALIAS pointer to
     * a LIB_PART pointer is not required.
     *
     * @param aName - Name of part, case sensitive.
     * @return LIB_PART* - part if found, else NULL.
     */
    LIB_PART* FindPart( const wxString& aName );

    /**
     * Add \a aPart entry to library.
     *
     * @note A #LIB_PART can have an alias list so these alias will be added in library.
     *       and the any existing duplicate aliases will be removed from the library.
     *
     * @param aPart - Part to add, caller retains ownership, a clone is added.
     */
    void AddPart( LIB_PART* aPart );

    /**
     * Safely remove \a aEntry from the library and return the next entry.
     *
     * The next entry returned depends on the entry being removed.  If the entry being
     * remove also removes the part, then the next entry from the list is returned.
     * If the entry being used only removes an alias from a part, then the next alias
     * of the part is returned.
     *
     * @param aEntry - Entry to remove from library.
     * @return The next entry in the library or NULL if the library is empty.
     */
    LIB_ALIAS* RemoveAlias( LIB_ALIAS* aEntry );

    /**
     * Replace an existing part entry in the library.
     * Note a part can have an alias list,
     * so these alias will be added in library (and previously existing alias removed)
     * @param aOldPart - The part to replace.
     * @param aNewPart - The new part.
     */
    LIB_PART* ReplacePart( LIB_PART* aOldPart, LIB_PART* aNewPart );

    /**
     * Return the file name without path or extension.
     *
     * @return Name of library file.
     */
    const wxString GetName() const            { return fileName.GetName(); }

    /**
     * Function GetFullFileName
     * returns the full file library name with path and extension.
     *
     * @return wxString - Full library file name with path and extension.
     */
    wxString GetFullFileName()          { return fileName.GetFullPath(); }

    /**
     * Function GetLogicalName
     * returns the logical name of the library.
     * @return wxString - The logical name of this library.
     */
    const wxString GetLogicalName()
    {
        /*  for now is the filename without path or extension.

            Technically the library should not know its logical name!
            This will eventually come out of a pair of lookup tables using a
            reverse lookup using the full name or library pointer as a key.
            Search will be by project lookup table and then user lookup table if
            not found.
        */
        return fileName.GetName();
    }


    /**
     * Function LoadLibrary
     * allocates and loads a part library file.
     *
     * @param aFileName - File name of the part library to load.
     * @return PART_LIB* - the allocated and loaded PART_LIB, which is owned by
     *   the caller.
     * @throw IO_ERROR if there's any problem loading the library.
     */
    static PART_LIB* LoadLibrary( const wxString& aFileName );

    /**
     * Function HasPowerParts
     * @return true if at least one power part is found in lib
     * Useful to select or list only libs containing power parts
     */
    bool HasPowerParts();
};


/**
 * Case insensitive library name comparison.
 */
bool operator==( const PART_LIB& aLibrary, const wxString& aName );
bool operator!=( const PART_LIB& aLibrary, const wxString& aName );

#endif  //  CLASS_LIBRARY_H