/**
 * $Id:
 *
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * Contributor(s): Campbell Barton
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "bpy_app.h"
#include "bpy_util.h"

#include "BLI_path_util.h"

#include "BKE_blender.h"
#include "BKE_global.h"
#include "structseq.h"

#ifdef BUILD_DATE
extern char * build_date;
extern char * build_time;
extern char * build_rev;
extern char * build_platform;
extern char * build_type;
#else
static char * build_date = "Unknown";
static char * build_time = "Unknown";
static char * build_rev = "Unknown";
static char * build_platform = "Unknown";
static char * build_type = "Unknown";
#endif

static PyTypeObject BlenderAppType;

static PyStructSequence_Field app_info_fields[] = {
	{"version", "The Blender version as a tuple of 3 numbers. eg. (2, 50, 11)"},
	{"version_string", "The Blender version formatted as a string"},
	{"home", "The blender home directory, normally matching $HOME"},
	{"binary_path", "The location of blenders executable, useful for utilities that spawn new instances"},
	{"debug", "Boolean, set when blender is running in debug mode (started with -d)"},

	/* buildinfo */
	{"build_date", "The date this blender instance was built"},
	{"build_time", "The time this blender instance was built"},
	{"build_revision", "The subversion revision this blender instance was built with"},
	{"build_platform", "The platform this blender instance was built for"},
	{"build_type", "The type of build (Release, Debug)"},
	{0}
};

static PyStructSequence_Desc app_info_desc = {
	"bpy.app",     /* name */
	"This module contains application values that remain unchanged during runtime.",    /* doc */
	app_info_fields,    /* fields */
	10
};

static PyObject *make_app_info(void)
{
	extern char bprogname[]; /* argv[0] from creator.c */

	PyObject *app_info;
	int pos = 0;

	app_info = PyStructSequence_New(&BlenderAppType);
	if (app_info == NULL) {
		return NULL;
	}

#define SetIntItem(flag) \
	PyStructSequence_SET_ITEM(app_info, pos++, PyLong_FromLong(flag))
#define SetStrItem(flag) \
	PyStructSequence_SET_ITEM(app_info, pos++, PyUnicode_FromString(flag))
#define SetObjItem(obj) \
	PyStructSequence_SET_ITEM(app_info, pos++, obj)

	SetObjItem(Py_BuildValue("(iii)", BLENDER_VERSION/100, BLENDER_VERSION%100, BLENDER_SUBVERSION));
	SetObjItem(PyUnicode_FromFormat("%d.%02d (sub %d)", BLENDER_VERSION/100, BLENDER_VERSION%100, BLENDER_SUBVERSION));
	SetStrItem(BLI_gethome());
	SetStrItem(bprogname);
	SetObjItem(PyBool_FromLong(G.f & G_DEBUG));

	/* build info */
	SetStrItem(build_date);
	SetStrItem(build_time);
	SetStrItem(build_rev);
	SetStrItem(build_platform);
	SetStrItem(build_type);

#undef SetIntItem
#undef SetStrItem
#undef SetObjItem

	if (PyErr_Occurred()) {
		Py_CLEAR(app_info);
		return NULL;
	}
	return app_info;
}

PyObject *BPY_app_struct(void)
{
	PyObject *ret;

	PyStructSequence_InitType(&BlenderAppType, &app_info_desc);

	ret= make_app_info();

	/* prevent user from creating new instances */
	BlenderAppType.tp_init = NULL;
	BlenderAppType.tp_new = NULL;
	
	return ret;
}