/*
 *
 * Conky, a system monitor, based on torsmo
 *
 * Any original torsmo code is licensed under the BSD license
 *
 * All code written since the fork of torsmo is licensed under the GPL
 *
 * Please see COPYING for details
 *
 * Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
 * Copyright (c) 2007 Toni Spets
 * Copyright (c) 2005-2024 Brenden Matthews, Philip Kovacs, et. al.
 *	(see AUTHORS)
 * All rights reserved.
 *
 * 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/>.
 *
 */

#include "ibm.h"
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../../conky.h"
#include "../../content/temphelper.h"
#include "../../logging.h"
#include "config.h"

static int ibm_acpi_temps[8];

/* Here come the IBM ACPI-specific things. For reference, see
 * http://ibm-acpi.sourceforge.net/README
 * If IBM ACPI is installed, /proc/acpi/ibm contains the following files:
bay
beep
bluetooth
brightness
cmos
dock
driver
ecdump
fan
hotkey
led
light
thermal
video
volume
 * The content of these files is described in detail in the aforementioned
 * README - some of them also in the following functions accessing them.
 * Peter Tarjan (ptarjan@citromail.hu) */

#define IBM_ACPI_DIR "/proc/acpi/ibm"

/* get fan speed on IBM/Lenovo laptops running the ibm acpi.
 * /proc/acpi/ibm/fan looks like this (3 lines):
status:         disabled
speed:          2944
commands:       enable, disable
 * Peter Tarjan (ptarjan@citromail.hu) */

void get_ibm_acpi_fan(struct text_object *obj, char *p,
                      unsigned int p_max_size) {
  FILE *fp;
  unsigned int speed = 0;
  char fan[128];

  (void)obj;

  if (!p || p_max_size <= 0) { return; }

  snprintf(fan, 127, "%s/fan", IBM_ACPI_DIR);

  fp = fopen(fan, "r");
  if (fp != nullptr) {
    while (!feof(fp)) {
      char line[256];

      if (fgets(line, 255, fp) == nullptr) { break; }
      if (sscanf(line, "speed: %u", &speed)) { break; }
    }
  } else {
    SYSTEM_ERR(
        "can't open '{}': {}\nYou are not using the IBM ACPI. Remove "
        "ibm* from your " PACKAGE_NAME " config file.",
        fan, strerror(errno));
  }

  fclose(fp);
  snprintf(p, p_max_size, "%d", speed);
}

/* get the measured temperatures from the temperature sensors
 * on IBM/Lenovo laptops running the ibm acpi.
 * There are 8 values in /proc/acpi/ibm/thermal, and according to
 * http://ibm-acpi.sourceforge.net/README
 * these mean the following (at least on an IBM R51...)
 * 0:  CPU (also on the T series laptops)
 * 1:  Mini PCI Module (?)
 * 2:  HDD (?)
 * 3:  GPU (also on the T series laptops)
 * 4:  Battery (?)
 * 5:  N/A
 * 6:  Battery (?)
 * 7:  N/A
 * I'm not too sure about those with the question mark, but the values I'm
 * reading from *my* thermal file (on a T42p) look realistic for the
 * hdd and the battery.
 * #5 and #7 are always -128.
 * /proc/acpi/ibm/thermal looks like this (1 line):
temperatures:   41 43 31 46 33 -128 29 -128
 * Peter Tarjan (ptarjan@citromail.hu) */

int get_ibm_acpi_temps(void) {
  FILE *fp;
  char thermal[128];

  snprintf(thermal, 127, "%s/thermal", IBM_ACPI_DIR);
  fp = fopen(thermal, "r");

  if (fp != nullptr) {
    while (!feof(fp)) {
      char line[256];

      if (fgets(line, 255, fp) == nullptr) { break; }
      if (sscanf(line, "temperatures: %d %d %d %d %d %d %d %d",
                 &ibm_acpi_temps[0], &ibm_acpi_temps[1], &ibm_acpi_temps[2],
                 &ibm_acpi_temps[3], &ibm_acpi_temps[4], &ibm_acpi_temps[5],
                 &ibm_acpi_temps[6], &ibm_acpi_temps[7])) {
        break;
      }
    }
  } else {
    SYSTEM_ERR(
        "can't open '{}': {}\nYou are not using the IBM ACPI. Remove "
        "ibm* from your " PACKAGE_NAME " config file.",
        thermal, strerror(errno));
  }

  fclose(fp);
  return 0;
}

/* get volume (0-14) on IBM/Lenovo laptops running the ibm acpi.
 * "Volume" here is none of the mixer volumes, but a "master of masters"
 * volume adjusted by the IBM volume keys.
 * /proc/acpi/ibm/fan looks like this (4 lines):
level:          4
mute:           off
commands:       up, down, mute
commands:       level <level> (<level> is 0-15)
 * Peter Tarjan (ptarjan@citromail.hu) */

void get_ibm_acpi_volume(struct text_object *obj, char *p,
                         unsigned int p_max_size) {
  FILE *fp;
  char volume[128];
  unsigned int vol = -1;
  char mute[3] = "";

  (void)obj;

  if (!p || p_max_size <= 0) { return; }

  snprintf(volume, 127, "%s/volume", IBM_ACPI_DIR);

  fp = fopen(volume, "r");
  if (fp != nullptr) {
    while (!feof(fp)) {
      char line[256];
      unsigned int read_vol = -1;

      if (fgets(line, 255, fp) == nullptr) { break; }
      if (sscanf(line, "level: %u", &read_vol)) {
        vol = read_vol;
        continue;
      }
      if (sscanf(line, "mute: %s", mute)) { break; }
    }
  } else {
    SYSTEM_ERR(
        "can't open '{}': {}\nYou are not using the IBM ACPI. Remove "
        "ibm* from your " PACKAGE_NAME " config file.",
        volume, strerror(errno));
  }

  fclose(fp);

  if (strcmp(mute, "on") == 0)
    snprintf(p, p_max_size, "%s", "mute");
  else
    snprintf(p, p_max_size, "%d", vol);
}

/* static FILE *fp = nullptr; */

/* get LCD brightness on IBM/Lenovo laptops running the ibm acpi.
 * /proc/acpi/ibm/brightness looks like this (3 lines):
level:          7
commands:       up, down
commands:       level <level> (<level> is 0-7)
 * Peter Tarjan (ptarjan@citromail.hu) */

void get_ibm_acpi_brightness(struct text_object *obj, char *p,
                             unsigned int p_max_size) {
  FILE *fp;
  unsigned int brightness = 0;
  char filename[128];

  (void)obj;

  if (!p || p_max_size <= 0) { return; }

  snprintf(filename, 127, "%s/brightness", IBM_ACPI_DIR);

  fp = fopen(filename, "r");
  if (fp != nullptr) {
    while (!feof(fp)) {
      char line[256];

      if (fgets(line, 255, fp) == nullptr) { break; }
      if (sscanf(line, "level: %u", &brightness)) { break; }
    }
  } else {
    SYSTEM_ERR(
        "can't open '{}': {}\nYou are not using the IBM ACPI. Remove "
        "ibm* from your " PACKAGE_NAME " config file.",
        filename, strerror(errno));
  }

  fclose(fp);

  snprintf(p, p_max_size, "%d", brightness);
}

/* get ThinkLight status on IBM/Lenovo laptops running the ibm acpi.
 * /proc/acpi/ibm/light looks like this (2 lines):
status:         off
commands:       on, off
 * http://ibm-acpi.sourceforge.net/README reports that it's also possible to
 * get "unknown" for a few models that do not make the status available.
 * Lluis Esquerda (eskerda@gmail.com) */

void get_ibm_acpi_thinklight(struct text_object *obj, char *p,
                             unsigned int p_max_size) {
  FILE *fp;
  char thinklight[8];
  char filename[128];

  (void)obj;

  if (!p || p_max_size <= 0) { return; }

  snprintf(filename, 127, "%s/light", IBM_ACPI_DIR);

  fp = fopen(filename, "r");
  if (fp != nullptr) {
    while (!feof(fp)) {
      char line[256];

      if (fgets(line, 255, fp) == nullptr) { break; }
      if (sscanf(line, "status: %s", thinklight)) { break; }
    }
  } else {
    SYSTEM_ERR(
        "can't open '{}': {}\nYou are not using the IBM "
        "ACPI. Remove ibm* from your " PACKAGE_NAME " config file.",
        filename, strerror(errno));
  }

  fclose(fp);
  snprintf(p, p_max_size, "%s", thinklight);
}

void parse_ibm_temps_arg(struct text_object *obj, const char *arg) {
  if (!isdigit(arg[0]) || strlen(arg) > 1 || atoi(&arg[0]) >= 8) {
    obj->data.l = 0;
    LOG_WARNING(
        "invalid ibm_temps sensor '{}': must be 0-7, "
        "falling back to 0 (CPU)",
        arg);
  } else
    obj->data.l = atoi(arg);
}

void print_ibm_temps(struct text_object *obj, char *p,
                     unsigned int p_max_size) {
  temp_print(p, p_max_size, ibm_acpi_temps[obj->data.l], TEMP_CELSIUS, 1);
}
