/*
 * Copyright (C) 2006 Sven Peter <svpe@gmx.net>
 *
 * 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
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */

#include <X11/Xlib.h>
#include <NVCtrl/NVCtrl.h>
#include <NVCtrl/NVCtrlLib.h>

#include <glib.h>
#include <glib/gi18n.h>
#include "nvidia-plugin.h"

const gchar *plugin_name = "nvidia";

#define GPU_CORE_TEMP "CoreTemp"
#define AMBIENT_TEMP "AmbientTemp"

/* global variables */
Display *nvidia_sensors_dpy; /* the connection to the X server */

int num_gpus;

/* returns the value of the sensor */
static gdouble nvidia_plugin_get_sensor_value(const gchar *path, 
                                              const gchar *id, 
                                              SensorType type,
                                              GError **error)
{
	Bool res;
	int temp;
	int i;

	i = g_ascii_strtoll(id + strlen("GPU"), NULL, 10);
        if (g_ascii_strcasecmp(path, GPU_CORE_TEMP) == 0) {
		res = XNVCTRLQueryTargetAttribute(nvidia_sensors_dpy,
						  NV_CTRL_TARGET_TYPE_GPU,
						  i,
						  0,
						  NV_CTRL_GPU_CORE_TEMPERATURE,
						  &temp);
        } else if (g_ascii_strcasecmp(path, AMBIENT_TEMP) == 0) {
		res = XNVCTRLQueryTargetAttribute(nvidia_sensors_dpy,
						  NV_CTRL_TARGET_TYPE_GPU,
						  i,
						  0,
						  NV_CTRL_AMBIENT_TEMPERATURE,
						  &temp);
        } else {
                g_set_error(error, SENSORS_APPLET_PLUGIN_ERROR, 0, "Invalid path string passed to nvidia_plugin_get_sensor_value");
                return 0;
        }
                

        if (res != True) {
                /* when res isn't true something went wrong */
                g_set_error(error, SENSORS_APPLET_PLUGIN_ERROR, 0, "XNVCTRLQueryAttribute returned false");
                return 0;
        }
        
        /* convert the int to gdouble and return it */
        return (gdouble)temp;
}

/* creates the connection to the X server and checks whether the
 * NV-CONTROL extension is loaded */
static GList *nvidia_plugin_init(void)
{
	int dummy;
	int event_base, error_base;
        GList *sensors = NULL;

	/* create the connection to the X server */
	if (!(nvidia_sensors_dpy = XOpenDisplay(NULL))) {
		/* no connection to the X server avaible */
		return sensors;
	}

	/* check if the NV-CONTROL extension is available on this X
         * server - if so add the two sensors if they exist */
	if (XNVCTRLQueryExtension(nvidia_sensors_dpy, &event_base, &error_base)) {
		if (XNVCTRLQueryTargetCount(nvidia_sensors_dpy,
					    NV_CTRL_TARGET_TYPE_GPU,
					    &num_gpus))
		{
			int i;
			for (i = 0; i < num_gpus; i++)
			{
				if (XNVCTRLQueryTargetAttribute(nvidia_sensors_dpy,
								NV_CTRL_TARGET_TYPE_GPU,
								i,
							       	0, NV_CTRL_GPU_CORE_TEMPERATURE, &dummy)) {
					gchar *id = g_strdup_printf("GPU%d%s", i, GPU_CORE_TEMP);

					sensors_applet_plugin_add_sensor(&sensors,
									 GPU_CORE_TEMP,
									 id,
									 _("GPU"),
									 TEMP_SENSOR,
									 TRUE,
									 GPU_ICON,
									 DEFAULT_GRAPH_COLOR);
					g_free(id);
				}
				if (XNVCTRLQueryTargetAttribute(nvidia_sensors_dpy,
								NV_CTRL_TARGET_TYPE_GPU,
								i,
							       	0, NV_CTRL_AMBIENT_TEMPERATURE, &dummy)) {
					gchar *id = g_strdup_printf("GPU%d%s", i, AMBIENT_TEMP);

					sensors_applet_plugin_add_sensor(&sensors,
                                                         AMBIENT_TEMP,
							 id,
                                                         _("Ambient"),
                                                         TEMP_SENSOR,
                                                         FALSE,
                                                         GENERIC_ICON,
                                                         DEFAULT_GRAPH_COLOR);
					g_free(id);
				}
			}
                }

        }
        return sensors;
}

const gchar *sensors_applet_plugin_name(void) 
{
        return plugin_name;
}

GList *sensors_applet_plugin_init(void) 
{
        return nvidia_plugin_init();
}

gdouble sensors_applet_plugin_get_sensor_value(const gchar *path, 
                                                const gchar *id, 
                                                SensorType type,
                                                GError **error) {
        return nvidia_plugin_get_sensor_value(path, id, type, error);
}