/*
 * Copyright (C) 2019 Weber Yann
 * 
 * This file is part of PyFCGI.
 * 
 * PyFCGI is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 * 
 * PyFCGI 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 Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with PyFCGI.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef _PYUTILS__H__
#define _PYUTILS__H__

#include "config.h"

#include <fcgiapp.h>
#include <fcgi_stdio.h> /* fcgi library; put it first*/

#define PY_SSIZE_T_CLEAN
#include <Python.h>

#include "logger.h"
#include "python_pyfcgi.h"

/* Imports from libpyfcgi python module header */
extern PyObject* response_status;
extern PyObject* response_headers;
extern PyObject* libpyfcgi_self;

/**@brief Call Py_Initialize & update_python_path
 */
void pyinit();

/**@brief Add . to the embed pythonpath
 * @deprecated Py_SetPath breaks Py_GetPrefix()... now 
 */
void update_python_path();

/**@brief Fetch stdout & stderr python flush() function
 * @param pystdout_flush will point on &sys.stdout.flush() python function
 * @param pystderr_flush will point on &sys.stderr.flush() python function
 */
void fetch_pyflush(PyObject** pystdout_flush, PyObject** pystderr_flush);

/**@brief Create two pipes for stdout & stderr
 * @ingroup worker_process
 * @param pipe_out pipe for stdout
 * @param pipe_err pipe for stderr
 * @warning Deprecated behavior. We will us ioin like classes for std & err
 * output
 */
void update_python_fd(int pipe_out[2], int pipe_err[2]);

/**@brief Clear then update python sys.environ using current FCGI environ
 * @ingroup worker_process
 * @note The environ has to be set without a call to os.putenv, the problem
 * is that the os.environ is a special mapping calling putenv on setitem...
 * For these reason the os.environ will be replaced by a new dict instance for
 * each request...
 * @param py_osmod Python os module
 * @param environ The environ string provided by libfcgi
 * @return Python env dict
 */
PyObject* update_pyenv(PyObject* py_osmod, char** environ);

/**@brief Import & return the python entrypoint callable
 * from PyFCGI_conf.py_entrymod & PyFCGI_conf.py_entryfun */
PyObject* import_entrypoint();

/**@brief Init and return libpyfcgi */
PyObject* pyinit_libpyfcgi();
/**@brief Return the start_response() python function for pep333 worker */
PyObject* get_start_response();


/**@brief Logs an exception */
void log_expt(int priority);

/**@brief Set python version
 * @param version version buffer */
void pyfcgi_python_version(char version[16]);

/**@brief Import os module and exit on error
 * @return Imported module */
PyObject* python_osmod();

#endif