// Created on: 1997-08-07
// Created by: Jean-Louis Frenkel
// Copyright (c) 1997-1999 Matra Datavision
// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.

#ifndef _CDF_Application_HeaderFile
#define _CDF_Application_HeaderFile

#include <TCollection_ExtendedString.hxx>
#include <PCDM_ReaderStatus.hxx>
#include <CDF_TypeOfActivation.hxx>
#include <CDF_MetaDataDriver.hxx>
#include <CDM_Application.hxx>
#include <CDM_CanCloseStatus.hxx>
#include <Standard_IStream.hxx>
#include <NCollection_IndexedDataMap.hxx>

class Standard_GUID;
class CDM_Document;
class PCDM_Reader;
class CDM_MetaData;
class PCDM_RetrievalDriver;
class PCDM_StorageDriver;
class CDF_Directory;

class CDF_Application : public CDM_Application
{

public:
  //! plugs an application.
  //!
  //! Open is used
  //! - for opening a Document that has been created in an application
  //! - for opening a Document from the database
  //! - for opening a Document from a file.
  //! The Open methods always add the document in the session directory and
  //! calls the virtual Activate method. The document is considered to be
  //! opened until Close is used. To be storable, a document must be
  //! opened by an application since the application resources are
  //! needed to store it.
  Standard_EXPORT static occ::handle<CDF_Application> Load(const Standard_GUID& aGUID);

  //! Constructs an new empty document.
  //! This document will have the specified format.
  //! If InitDocument() is redefined for a specific
  //! application, the new document is handled by the
  //! applicative session.
  Standard_EXPORT virtual void NewDocument(const TCollection_ExtendedString& theFormat,
                                           occ::handle<CDM_Document>&        theDoc);

  //! Initialize a document for the applicative session.
  //! This virtual function is called by NewDocument
  //! and should be redefined for each specific application.
  Standard_EXPORT virtual void InitDocument(const occ::handle<CDM_Document>& theDoc) const;

  //! puts the document in the current session directory
  //! and calls the virtual method Activate on it.
  Standard_EXPORT void Open(const occ::handle<CDM_Document>& aDocument);

  Standard_EXPORT CDM_CanCloseStatus CanClose(const occ::handle<CDM_Document>& aDocument);

  //! removes the document of the current session directory
  //! and closes the document;
  Standard_EXPORT void Close(const occ::handle<CDM_Document>& aDocument);

  //! This method retrieves a document from the database.
  //! If the Document references other documents which have
  //! been updated, the latest version of these documents will
  //! be used if {UseStorageConfiguration} is true.
  //! The content of {aFolder}, {aName} and {aVersion} depends on
  //! the Database Manager system. If the DBMS is only based on
  //! the OS, {aFolder} is a directory and {aName} is the name of a
  //! file. In this case the use of the syntax with {aVersion}
  //! has no sense. For example:
  //!
  //! occ::handle<CDM_Document> theDocument=myApplication->Retrieve("/home/cascade","box.dsg");
  //! If the DBMS is EUCLID/Design Manager, {aFolder}, {aName}
  //! have the form they have in EUCLID/Design Manager. For example:
  //!
  //! occ::handle<CDM_Document> theDocument=myApplication->Retrieve("|user|cascade","box");
  //!
  //! Since the version is not specified in this syntax, the latest will be used.
  //! A link is kept with the database through an instance of CDM_MetaData
  Standard_EXPORT occ::handle<CDM_Document> Retrieve(
    const TCollection_ExtendedString&     aFolder,
    const TCollection_ExtendedString&     aName,
    const bool                            UseStorageConfiguration = true,
    const occ::handle<PCDM_ReaderFilter>& theFilter = occ::handle<PCDM_ReaderFilter>(),
    const Message_ProgressRange&          theRange  = Message_ProgressRange());

  //! This method retrieves a document from the database.
  //! If the Document references other documents which have
  //! been updated, the latest version of these documents
  //! will be used if {UseStorageConfiguration} is
  //! true. If the DBMS is only based on the OS,
  //! this syntax should not be used.
  //!
  //! If the DBMS is EUCLID/Design Manager, {aFolder}, {aName}
  //! and {aVersion} have the form they have in
  //! EUCLID/Design Manager. For example:
  //!
  //! occ::handle<CDM_Document> theDocument=myApplication->Retrieve("|user|cascade","box","2");
  //! A link is kept with the database through an instance
  //! of CDM_MetaData
  Standard_EXPORT occ::handle<CDM_Document> Retrieve(
    const TCollection_ExtendedString&     aFolder,
    const TCollection_ExtendedString&     aName,
    const TCollection_ExtendedString&     aVersion,
    const bool                            UseStorageConfiguration = true,
    const occ::handle<PCDM_ReaderFilter>& theFilter = occ::handle<PCDM_ReaderFilter>(),
    const Message_ProgressRange&          theRange  = Message_ProgressRange());

  Standard_EXPORT PCDM_ReaderStatus CanRetrieve(const TCollection_ExtendedString& theFolder,
                                                const TCollection_ExtendedString& theName,
                                                const bool                        theAppendMode);

  Standard_EXPORT PCDM_ReaderStatus CanRetrieve(const TCollection_ExtendedString& theFolder,
                                                const TCollection_ExtendedString& theName,
                                                const TCollection_ExtendedString& theVersion,
                                                const bool                        theAppendMode);

  //! Checks status after Retrieve
  PCDM_ReaderStatus GetRetrieveStatus() const { return myRetrievableStatus; }

  //! Reads theDocument from standard SEEKABLE stream theIStream,
  //! the stream should support SEEK functionality
  Standard_EXPORT void Read(
    Standard_IStream&                     theIStream,
    occ::handle<CDM_Document>&            theDocument,
    const occ::handle<PCDM_ReaderFilter>& theFilter = occ::handle<PCDM_ReaderFilter>(),
    const Message_ProgressRange&          theRange  = Message_ProgressRange());

  //! Returns instance of read driver for specified format.
  //!
  //! Default implementation uses plugin mechanism to load reader dynamically.
  //! For this to work, application resources should define GUID of
  //! the plugin as value of [Format].RetrievalPlugin, and "Plugin"
  //! resource should define name of plugin library to be loaded as
  //! value of [GUID].Location. Plugin library should provide
  //! method PLUGINFACTORY returning instance of the reader for the
  //! same GUID (see Plugin_Macro.hxx).
  //!
  //! In case if reader is not available, will raise Standard_NoSuchObject
  //! or other exception if raised by plugin loader.
  Standard_EXPORT virtual occ::handle<PCDM_Reader> ReaderFromFormat(
    const TCollection_ExtendedString& aFormat);

  //! Returns instance of storage driver for specified format.
  //!
  //! Default implementation uses plugin mechanism to load driver dynamically.
  //! For this to work, application resources should define GUID of
  //! the plugin as value of [Format].StoragePlugin, and "Plugin"
  //! resource should define name of plugin library to be loaded as
  //! value of [GUID].Location. Plugin library should provide
  //! method PLUGINFACTORY returning instance of the reader for the
  //! same GUID (see Plugin_Macro.hxx).
  //!
  //! In case if driver is not available, will raise Standard_NoSuchObject
  //! or other exception if raised by plugin loader.
  Standard_EXPORT virtual occ::handle<PCDM_StorageDriver> WriterFromFormat(
    const TCollection_ExtendedString& aFormat);

  //! try to retrieve a Format directly in the file or in
  //! application resource by using extension.
  //! returns True if found
  Standard_EXPORT bool Format(const TCollection_ExtendedString& aFileName,
                              TCollection_ExtendedString&       theFormat);

  Standard_EXPORT const char16_t* DefaultFolder();

  Standard_EXPORT bool SetDefaultFolder(const char16_t* aFolder);

  //! returns MetaDatdDriver of this application
  Standard_EXPORT occ::handle<CDF_MetaDataDriver> MetaDataDriver() const;

  DEFINE_STANDARD_RTTIEXT(CDF_Application, CDM_Application)

  occ::handle<CDF_MetaDataDriver> myMetaDataDriver;
  occ::handle<CDF_Directory>      myDirectory;

private:
  //! Informs the application that aDocument has been
  //! activated. A document is activated when it is created or
  //! retrieved.
  //! aTypeOfActivation will be:
  //! - CDF_TOA_New if the document is a new one
  //! (even empty or retrieved from the database for
  //! the first time).
  //! - CDF_TOA_Unchanged if the document was already
  //! retrieved but had no changes since the previous retrieval.
  //! - CDF_TOA_Modified if the document was already
  //! retrieved and modified since the previous retrieval.
  //! You do not need to call <Activate>, but you should redefine
  //! this method to implement application specific behavior.
  Standard_EXPORT virtual void Activate(const occ::handle<CDM_Document>& aDocument,
                                        const CDF_TypeOfActivation       aTypeOfActivation);

  Standard_EXPORT occ::handle<CDM_Document> Retrieve(
    const occ::handle<CDM_MetaData>&      aMetaData,
    const bool                            UseStorageConfiguration,
    const occ::handle<PCDM_ReaderFilter>& theFilter = occ::handle<PCDM_ReaderFilter>(),
    const Message_ProgressRange&          theRange  = Message_ProgressRange()) override;

  Standard_EXPORT occ::handle<CDM_Document> Retrieve(
    const occ::handle<CDM_MetaData>&      aMetaData,
    const bool                            UseStorageConfiguration,
    const bool                            IsComponent,
    const occ::handle<PCDM_ReaderFilter>& theFilter = occ::handle<PCDM_ReaderFilter>(),
    const Message_ProgressRange&          theRange  = Message_ProgressRange());

  Standard_EXPORT int DocumentVersion(const occ::handle<CDM_MetaData>& theMetaData) override;

  Standard_EXPORT CDF_TypeOfActivation TypeOfActivation(const occ::handle<CDM_MetaData>& aMetaData);

  Standard_EXPORT PCDM_ReaderStatus CanRetrieve(const occ::handle<CDM_MetaData>& aMetaData,
                                                const bool                       theAppendMode);

protected:
  Standard_EXPORT CDF_Application();

  PCDM_ReaderStatus myRetrievableStatus;
  NCollection_IndexedDataMap<TCollection_ExtendedString, occ::handle<PCDM_RetrievalDriver>>
                                                                                          myReaders;
  NCollection_IndexedDataMap<TCollection_ExtendedString, occ::handle<PCDM_StorageDriver>> myWriters;

private:
  TCollection_ExtendedString myDefaultFolder;
};

#endif // _CDF_Application_HeaderFile
