/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

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/>.

Additional permissions under GNU GPL version 3 section 7

If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent
JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK
(or a modified version of those libraries),
containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA,
PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG
JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the
licensors of this Program grant you additional
permission to convey the resulting work. Corresponding Source for a
non-source form of such a combination shall include the source code for
the parts of OpenSSL and IJG JPEG Library used as well as that of the covered
work.

You can contact Cyan Worlds, Inc. by email legal@cyan.com
 or by snail mail at:
      Cyan Worlds, Inc.
      14617 N Newport Hwy
      Mead, WA   99021

*==LICENSE==*/
//////////////////////////////////////////////////////////////////////
//
// PythonInterface   - The Python interface to the Python dll
//
// NOTE: Eventually, this will be made into a separate dll, because there should
//       only be one instance of this interface. 
//
#include "HeadSpin.h"
#include "hsStlUtils.h"

#if defined(HAVE_CYPYTHONIDE) && !defined(PLASMA_EXTERNAL_RELEASE)
#include "../../Apps/CyPythonIDE/plCyDebug/plCyDebServer.h"
#endif

class plStatusLog;
class pyKey;
typedef struct _object PyObject;
typedef struct PyMethodDef PyMethodDef;

class  PythonInterface
{
private:
    static int32_t initialized;   // count how many times we initialize
                                // and make sure that many finalize on the way out
    static hsBool FirstTimeInit;
    static hsBool IsInShutdown; // whether we are _really_ in shutdown mode

    static PyMethodDef* plasmaMethods;
    static PyObject* plasmaMod; // python object that holds the Plasma module
    static PyObject* plasmaConstantsMod; // python object that holds the PlasmaConstants module
    static PyObject* plasmaNetConstantsMod; // python object that holds the PlasmaNetConstants module
    static PyObject* plasmaVaultConstantsMod; // python object that holds the PlasmaVaultConstants module
    static PyMethodDef* plasmaGameMethods;
    static PyObject* plasmaGameMod; // python object that holds the PlasmaGame module
    static PyObject* plasmaGameConstantsMod; // python object that holds the PlasmaGameConstants module
    static PyObject* stdOut;    // python object of the stdout file
    static PyObject* stdErr;    // python object of the err file

    static hsBool debug_initialized;    // has the debug been initialized yet?
    static PyObject* dbgMod;    // display module for stdout and stderr
    static PyObject* dbgOut;
    static PyObject* dbgSlice;  // time slice function for the debug window
    static plStatusLog* dbgLog;

#if defined(HAVE_CYPYTHONIDE) && !defined(PLASMA_EXTERNAL_RELEASE)
    static bool usePythonDebugger;
    static bool requestedExit;
    static plCyDebServer debugServer;
#endif

public:

    // set that we are truly shutting down
    static void WeAreInShutdown() { IsInShutdown = true; }

    // Initialize the Python dll
    static void initPython();

    // Initialize the Plasma module
    static void AddPlasmaMethods(std::vector<PyMethodDef> &methods);
    static void AddPlasmaClasses();

    // Initialize the PlasmaConstants module
    static void AddPlasmaConstantsClasses();

    // Initialize the PlasmaNetConstants module;
    static void AddPlasmaNetConstantsClasses();

    // Initialize the PlasmaVaultConstants module;
    static void AddPlasmaVaultConstantsClasses();

    // Initialize the PlasmaGame module
    static void AddPlasmaGameMethods(std::vector<PyMethodDef> &methods);
    static void AddPlasmaGameClasses();

    // Initialize the PlasmaGameConstants module
    static void AddPlasmaGameConstantsClasses();

    // Initialize the Python to Plasma 
    static void initDebugInterface();

    // Finalize the Python dll, ie. get ready to shut down
    static void finiPython();

    // give the debug window a time slice
    static void debugTimeSlice();

    // get the stdout PyObject
    static PyObject* GetStdOut();
    static PyObject* GetStdErr();

    // get the Output to the error file to be displayed
    static int getOutputAndReset(std::string* output = nil);

    // Writes 'text' to the Python log
    static void WriteToLog(const char* text);

    // Writes 'text' to stderr specified in the python interface
    static void WriteToStdErr(const char* text);

    // Find module. If it doesn't exist then don't create, return nil.
    static PyObject* FindModule(const char* module);

    // create a new module with built-ins
    static PyObject* CreateModule(const char* module);

    // checks to see if a specific function is defined in this module
    // get an item (probably a function) from the Plasma module
    static PyObject* GetPlasmaItem(char* item);

    // Determine if the module name is unique
    static hsBool IsModuleNameUnique(char* module);
    // get an item (probably a function) from a specific module
    static PyObject* GetModuleItem(char* item, PyObject* module);

    // check a specific module for the define funcitons
    static void CheckModuleForFunctions(PyObject* module, char** funcNames, PyObject** funcTable);

    //  checks to see if a specific function is defined in this instance of a class
    //  and will fill out the funcTable with object instances of where the funciton is
    //
    static void CheckInstanceForFunctions(PyObject* instance, char** funcNames, PyObject** funcTable);

    //  run a python string in a specific module name
    //  PARAMETERS : command       - string of commands to execute in the...
    //             : filename      - filename to say where to code came from
    static PyObject* CompileString(char *command, char* filename);

    /////////////////////////////////////////////////////////////////////////////
    //
    //  Function   : DumpObject
    //  PARAMETERS : pyobject       - string of commands to execute in the...
    //
    //  PURPOSE    : marshals an object into a char string
    //
    static hsBool DumpObject(PyObject* pyobj, char** pickle, int32_t* size);

    /////////////////////////////////////////////////////////////////////////////
    //
    //  Function   : LoadObject
    //  PARAMETERS : pickle    - the pickled object in char string form
    //             : size      - size of the guts to load into an object
    //
    //  PURPOSE    : Load a python object from a pickled object
    //
    static PyObject* LoadObject(char* pickle, int32_t size);


    /////////////////////////////////////////////////////////////////////////////
    //
    //  Function   : RunStringInteractive
    //  PARAMETERS : command   - string of commands to execute in the...
    //             : module    - module name to run 'command' in
    //
    //  PURPOSE    : run a python string in a specific module name
    //             : Interactive mode (displays results)
    //
    static hsBool RunStringInteractive(char *command, PyObject* module);


    /////////////////////////////////////////////////////////////////////////////
    //
    //  Function   : RunString
    //  PARAMETERS : command   - string of commands to execute in the...
    //             : module    - module name to run 'command' in
    //
    //  PURPOSE    : run a python string in a specific module name
    //
    static hsBool RunString(char *command, PyObject* module);


    /////////////////////////////////////////////////////////////////////////////
    //
    //  Function   : RunPYC
    //  PARAMETERS : code      - compiled code
    //             : module    - module name to run the code in
    //
    //  PURPOSE    : run a compiled python code in a specific module name
    //
    static hsBool RunPYC(PyObject* code, PyObject* module);

    /////////////////////////////////////////////////////////////////////////////
    //
    //  Function   : GetpyKeyFromPython
    //  PARAMETERS : pkey      - python object that is a pyKey (ptKey) class
    //
    //  PURPOSE    : turn a PyObject* into a pyKey*
    //
    static pyKey* GetpyKeyFromPython(PyObject* pkey);

#if defined(HAVE_CYPYTHONIDE) && !defined(PLASMA_EXTERNAL_RELEASE)
    static bool UsePythonDebugger() { return usePythonDebugger; }
    static void UsePythonDebugger(bool use) { usePythonDebugger = use; }

    static plCyDebServer* PythonDebugger() {return &debugServer;}
    static bool DebuggerRequestedExit() {return requestedExit;}
    static void DebuggerRequestedExit(bool reqExit) {requestedExit = reqExit;}
#endif
};