/*
 *
 * Bacula interface to Python for the Storage Daemon
 *
 * Kern Sibbald, January MMV
 *
 *   Version $Id: pythonsd.c 4992 2007-06-07 14:46:43Z kerns $
 *
 */
/*
   Bacula® - The Network Backup Solution

   Copyright (C) 2005-2006 Free Software Foundation Europe e.V.

   The main author of Bacula is Kern Sibbald, with contributions from
   many others, a complete list can be found in the file AUTHORS.
   This program is Free Software; you can redistribute it and/or
   modify it under the terms of version two of the GNU General Public
   License as published by the Free Software Foundation and included
   in the file LICENSE.

   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, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
   02110-1301, USA.

   Bacula® is a registered trademark of John Walker.
   The licensor of Bacula is the Free Software Foundation Europe
   (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
   Switzerland, email:ftf@fsfeurope.org.
*/


#include "bacula.h"
#include "stored.h"

#ifdef HAVE_PYTHON
#undef _POSIX_C_SOURCE
#include <Python.h>

extern JCR *get_jcr_from_PyObject(PyObject *self);
extern PyObject *find_method(PyObject *eventsObject, PyObject *method, 
         const char *name);

static PyObject *set_job_events(PyObject *self, PyObject *arg);
static PyObject *job_write(PyObject *self, PyObject *arg);

PyMethodDef JobMethods[] = {
    {"set_events", set_job_events, METH_VARARGS, "Set Job events"},
    {"write", job_write, METH_VARARGS, "Write to output"},
    {NULL, NULL, 0, NULL}             /* last item */
};


struct s_vars {
   const char *name;
   char *fmt;
};

static struct s_vars getvars[] = {
   { NT_("Job"),        "s"},          /* 0 */
   { NT_("SDName"),     "s"},          /* 1 */
   { NT_("Level"),      "s"},          /* 2 */
   { NT_("Type"),       "s"},          /* 3 */
   { NT_("JobId"),      "i"},          /* 4 */
   { NT_("Client"),     "s"},          /* 5 */
   { NT_("Pool"),       "s"},          /* 6 */
   { NT_("MediaType"),  "s"},          /* 7 */
   { NT_("JobName"),    "s"},          /* 8 */
   { NT_("JobStatus"),  "s"},          /* 9 */
   { NT_("VolumeName"), "s"},          /* 10 */
   { NT_("Device"),     "s"},          /* 11 */

   { NULL,             NULL}
};


/* Writable variables */
static struct s_vars setvars[] = {
   { NT_("JobReport"),   "s"},

   { NULL,             NULL}
};


/* Return Job variables */
PyObject *job_getattr(PyObject *self, char *attrname)
{
   JCR *jcr;
   bool found = false;
   int i;
   char buf[10];
   char errmsg[200];
   
   Dmsg1(100, "In job_getattr=%s\n", attrname);
   jcr = get_jcr_from_PyObject(self);
   if (!jcr) {
      bstrncpy(errmsg, _("Job pointer not found."), sizeof(errmsg));
      goto bail_out;
   }

   for (i=0; getvars[i].name; i++) {
      if (strcmp(getvars[i].name, attrname) == 0) {
         found = true;
         break;
      }
   }
   if (!found) {
      /* Try our methods */
      return Py_FindMethod(JobMethods, self, attrname);
   }  
   switch (i) {
   case 0:                            /* Job */
      return Py_BuildValue(getvars[i].fmt, jcr->job_name);    /* Non-unique name */
   case 1:                            /* SD's name */
      return Py_BuildValue(getvars[i].fmt, my_name);
   case 2:                            /* level */
      return Py_BuildValue(getvars[i].fmt, job_level_to_str(jcr->JobLevel));
   case 3:                            /* type */
      return Py_BuildValue(getvars[i].fmt, job_type_to_str(jcr->JobType));
   case 4:                            /* JobId */
      return Py_BuildValue(getvars[i].fmt, jcr->JobId);
   case 5:                            /* Client */
      return Py_BuildValue(getvars[i].fmt, jcr->client_name);
   case 6:                            /* Pool */
      return Py_BuildValue(getvars[i].fmt, jcr->dcr->pool_name);
   case 7:                            /* MediaType */
      return Py_BuildValue(getvars[i].fmt, jcr->dcr->media_type);
   case 8:                            /* JobName */
      return Py_BuildValue(getvars[i].fmt, jcr->Job);
   case 9:                            /* JobStatus */
      buf[1] = 0;
      buf[0] = jcr->JobStatus;
      return Py_BuildValue(getvars[i].fmt, buf);
   case 10:
      return Py_BuildValue(getvars[i].fmt, jcr->dcr->VolumeName);
   case 11:
      return Py_BuildValue(getvars[i].fmt, jcr->dcr->dev_name);
   }
   bsnprintf(errmsg, sizeof(errmsg), _("Attribute %s not found."), attrname);
bail_out:
   PyErr_SetString(PyExc_AttributeError, errmsg);
   return NULL;
}

int job_setattr(PyObject *self, char *attrname, PyObject *value)
{
  JCR *jcr;
   bool found = false;
   char *strval = NULL;
   char buf[200];
   char *errmsg;
   int i;

   Dmsg2(100, "In job_setattr=%s val=%p.\n", attrname, value);
   if (value == NULL) {                /* Cannot delete variables */
      bsnprintf(buf, sizeof(buf), _("Cannot delete attribute %s"), attrname);
      errmsg = buf;
      goto bail_out;
   }
   jcr = get_jcr_from_PyObject(self);
   if (!jcr) {
      errmsg = _("Job pointer not found.");
      goto bail_out;
   }

   /* Find attribute name in list */
   for (i=0; setvars[i].name; i++) {
      if (strcmp(setvars[i].name, attrname) == 0) {
         found = true;
         break;
      }
   }
   if (!found) {
      goto not_found;
   }
   /* Get argument value ***FIXME*** handle other formats */
   if (setvars[i].fmt != NULL) {
      if (!PyArg_Parse(value, setvars[i].fmt, &strval)) {
         PyErr_SetString(PyExc_TypeError, _("Read-only attribute"));
         return -1;
      }
   }   
   switch (i) {
   case 0:                            /* JobReport */
      Jmsg(jcr, M_INFO, 0, "%s", strval);
      return 0;
   }
not_found:
   bsnprintf(buf, sizeof(buf), _("Cannot find attribute %s"), attrname);
   errmsg = buf;
bail_out:
   PyErr_SetString(PyExc_AttributeError, errmsg);
   return -1;
}


static PyObject *set_job_events(PyObject *self, PyObject *arg)
{
   PyObject *eObject;
   JCR *jcr;

   Dmsg0(100, "In set_job_events.\n");
   if (!PyArg_ParseTuple(arg, "O:set_events", &eObject)) {
      Pmsg0(000, _("Error in ParseTuple\n"));
      return NULL;
   }
   jcr = get_jcr_from_PyObject(self);
   Py_XDECREF((PyObject *)jcr->Python_events);
   Py_INCREF(eObject);
   jcr->Python_events = (void *)eObject;
   Py_INCREF(Py_None);
   return Py_None;
}

static PyObject *job_write(PyObject *self, PyObject *args)
{
   char *text = NULL;

   if (!PyArg_ParseTuple(args, "s:write", &text)) {
      Pmsg0(000, _("Parse tuple error in job_write\n"));
      return NULL;
   }
   if (text) {
      Jmsg(NULL, M_INFO, 0, "%s", text);
   }
   Py_INCREF(Py_None);
   return Py_None;
}


int generate_job_event(JCR *jcr, const char *event)
{
   PyObject *method = NULL;
   PyObject *Job = (PyObject *)jcr->Python_job;
   PyObject *events = (PyObject *)jcr->Python_events;
   PyObject *result = NULL;
   int stat = 0;

   if (!Job || !events) {
      return 0;
   }

   lock_python();
// PyEval_AcquireLock();

   method = find_method(events, method, event);
   if (!method) {
      goto bail_out;
   }

   bstrncpy(jcr->event, event, sizeof(jcr->event));
   result = PyObject_CallFunction(method, "O", Job);
   jcr->event[0] = 0;             /* no event in progress */
   if (result == NULL) {
      if (PyErr_Occurred()) {
         PyErr_Print();
         Dmsg1(000, _("Error in Python method %s\n"), event);
      }
   } else {
      stat = 1;
   }
   Py_XDECREF(result);

bail_out:
   unlock_python();
// PyEval_ReleaseLock();
   return stat;
}


#else

/* Dummy if Python not configured */
int generate_job_event(JCR *jcr, const char *event)
{ return 1; }


#endif /* HAVE_PYTHON */