/*
 *
 * 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) 2005-2021 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 <OS.h>

#include "conky.h"
#include "haiku.h"
#include "net_stat.h"
#include "top.h"

static short cpu_setup = 0;

void prepare_update() {}

int update_uptime() {
  info.uptime = (double)system_time() / 1000000.0;
  return 0;
}

int check_mount(struct text_object *obj) {
  /* stub */
  (void)obj;
  return 0;
}

int update_meminfo() {
  system_info si;

  if (get_system_info(&si) != B_OK) {
    fprintf(stderr, "Cannot get_system_info\n");
    return 1;
  }

  info.memmax = si.max_pages * (B_PAGE_SIZE >> 10);
  info.mem = si.used_pages * (B_PAGE_SIZE >> 10);
  // TODO: we have some more info...
  info.memwithbuffers = info.mem;
  info.memeasyfree = info.memfree = info.memmax - info.mem;
  info.legacymem = info.mem;

  info.swapmax = si.max_swap_pages * (B_PAGE_SIZE >> 10);
  info.swapfree = si.free_swap_pages * (B_PAGE_SIZE >> 10);
  info.swap = (info.swapmax - info.swapfree);

  return 0;
}

int update_net_stats() {
  // TODO
  return 1;
}

int update_total_processes() {
  // TODO
  return 0;
}

int update_running_processes() {
  // TODO
  return 1;
}

void get_cpu_count(void) {
  system_info si;

  if (get_system_info(&si) != B_OK) {
    fprintf(stderr, "Cannot get_system_info\n");
    info.cpu_count = 0;
    return;
  }
  info.cpu_count = si.cpu_count;

  info.cpu_usage = (float *)malloc((info.cpu_count + 1) * sizeof(float));
  if (info.cpu_usage == nullptr) { CRIT_ERR(nullptr, NULL, "malloc"); }
}

int update_cpu_usage() {
  // TODO
  static bigtime_t prev = 0;
  static cpu_info *prev_cpuinfo = nullptr;
  bigtime_t now;
  cpu_info *cpuinfo;

  /* add check for !info.cpu_usage since that mem is freed on a SIGUSR1 */
  if ((cpu_setup == 0) || (!info.cpu_usage)) {
    get_cpu_count();
    cpu_setup = 1;
  }

  int malloc_cpu_size = sizeof(cpu_info) * (info.cpu_count + 1);

  if (!prev_cpuinfo) {
    prev_cpuinfo = (cpu_info *)malloc(malloc_cpu_size);
    if (prev_cpuinfo == nullptr) { CRIT_ERR(nullptr, NULL, "malloc"); }
    memset(prev_cpuinfo, 0, malloc_cpu_size);
  }

  cpuinfo = (cpu_info *)malloc(malloc_cpu_size);
  memset(cpuinfo, 0, malloc_cpu_size);

  if (cpuinfo == nullptr) { CRIT_ERR(nullptr, NULL, "malloc"); }

  now = system_time();
  if (get_cpu_info(0, info.cpu_count, &cpuinfo[1]) == B_OK) {
    for (int i = 1; i <= info.cpu_count; i++)
      cpuinfo[0].active_time += cpuinfo[i].active_time;
    cpuinfo[0].active_time /= info.cpu_count;
    for (int i = 0; i <= info.cpu_count; i++) {
      double period = (double)(now - prev);
      info.cpu_usage[i] =
          ((double)(cpuinfo[i].active_time - prev_cpuinfo[i].active_time)) /
          period;
    }
  }

  memcpy(prev_cpuinfo, cpuinfo, malloc_cpu_size);
  prev = now;
  free(cpuinfo);
  return 1;
}

void free_cpu(struct text_object *) { /* no-op */
}

int update_load_average() {
  // TODO
  return 1;
}

double get_acpi_temperature(int fd) { return -1; }

void get_battery_stuff(char *buf, unsigned int n, const char *bat, int item) {
  // TODO
}

int get_battery_perct(const char *bat) {
  /*
  int batcapacity;

  get_battery_stats(nullptr, &batcapacity, NULL, NULL);
  return batcapacity;
  */
  // TODO
  return 0;
}

double get_battery_perct_bar(struct text_object *obj) {
  int batperct = get_battery_perct(obj->data.s);
  return batperct;
}

int open_acpi_temperature(const char *name) { return -1; }

void get_acpi_ac_adapter(char *p_client_buffer, size_t client_buffer_size,
                         const char *adapter) {
  (void)adapter;  // only linux uses this

  if (!p_client_buffer || client_buffer_size <= 0) { return; }

  /* not implemented */
  memset(p_client_buffer, 0, client_buffer_size);
}

/* char *get_acpi_fan() */
void get_acpi_fan(char *p_client_buffer, size_t client_buffer_size) {
  if (!p_client_buffer || client_buffer_size <= 0) { return; }

  /* not implemented */
  memset(p_client_buffer, 0, client_buffer_size);
}

/* void */
char get_freq(char *p_client_buffer, size_t client_buffer_size,
              const char *p_format, int divisor, unsigned int cpu) {
  int freq;
  char *freq_sysctl;

  if (!p_client_buffer || client_buffer_size <= 0 || !p_format ||
      divisor <= 0) {
    return 0;
  }
  return 0;
  // TODO
  //	return 1;
}

int update_diskio(void) { return 1; }

void get_top_info(void) {
  int32 tmcookie = 0;
  team_info tm;
  struct process *proc;

  while (get_next_team_info(&tmcookie, &tm) == B_NO_ERROR) {
    team_usage_info ti;

    if (get_team_usage_info(tm.team, B_TEAM_USAGE_SELF, &ti) != B_OK) continue;

    proc = get_process(tm.team);

    proc->time_stamp = g_time;
    proc->name = strndup(tm.args, sizeof(tm.args));
    proc->basename = strndup(tm.args, sizeof(tm.args));
    // proc->amount = 100.0 * p[i].ki_pctcpu / FSCALE;
    proc->vsize = 0;
    proc->rss = 0;
    /* bigtime_t is in microseconds, total_cpu_time in centiseconds.
     * Therefore we divide by 10000. */
    proc->total_cpu_time = (ti.user_time + ti.kernel_time) / 10000;
  }
}

void get_battery_short_status(char *buffer, unsigned int n, const char *bat) {
  // TODO
}

int get_entropy_avail(unsigned int *val) { return 1; }

int get_entropy_poolsize(unsigned int *val) { return 1; }