/**
 * Author......: See docs/credits.txt
 * License.....: MIT
 */

#include "common.h"
#include "types.h"
#include "logging.h"
#include "memory.h"
#include "interface.h"
#include "timer.h"
#include "ext_OpenCL.h"
#include "ext_ADL.h"
#include "ext_nvapi.h"
#include "ext_nvml.h"
#include "ext_xnvctrl.h"
#include "mpsp.h"
#include "rp_cpu.h"
#include "tuningdb.h"
#include "opencl.h"
#include "hwmon.h"
#include "restore.h"
#include "hash_management.h"
#include "thread.h"
#include "outfile.h"
#include "potfile.h"
#include "debugfile.h"
#include "loopback.h"
#include "data.h"
#include "status.h"
#include "shared.h"
#include "terminal.h"
#include "monitor.h"

extern hc_global_data_t data;

extern hc_thread_mutex_t mux_display;
extern hc_thread_mutex_t mux_hwmon;

void *thread_monitor (void *p)
{
  uint runtime_check = 0;
  uint remove_check  = 0;
  uint status_check  = 0;
  uint restore_check = 0;

  uint restore_left = data.restore_timer;
  uint remove_left  = data.remove_timer;
  uint status_left  = data.status_timer;

  opencl_ctx_t *opencl_ctx = data.opencl_ctx;
  hashconfig_t *hashconfig = data.hashconfig;
  hashes_t     *hashes     = data.hashes;

  #if defined (HAVE_HWMON)
  uint hwmon_check = 0;

  int slowdown_warnings = 0;

  // these variables are mainly used for fan control

  int *fan_speed_chgd = (int *) mycalloc (opencl_ctx->devices_cnt, sizeof (int));

  // temperature controller "loopback" values

  int *temp_diff_old = (int *) mycalloc (opencl_ctx->devices_cnt, sizeof (int));
  int *temp_diff_sum = (int *) mycalloc (opencl_ctx->devices_cnt, sizeof (int));

  int temp_threshold = 1; // degrees celcius

  int fan_speed_min =  15; // in percentage
  int fan_speed_max = 100;

  time_t last_temp_check_time;
  #endif // HAVE_HWMON

  uint sleep_time = 1;

  if (data.runtime)
  {
    runtime_check = 1;
  }

  if (data.restore_timer)
  {
    restore_check = 1;
  }

  if ((data.remove == 1) && (hashes->hashlist_mode == HL_MODE_FILE))
  {
    remove_check = 1;
  }

  if (data.status == 1)
  {
    status_check = 1;
  }

  #if defined (HAVE_HWMON)
  if (data.gpu_temp_disable == 0)
  {
    time (&last_temp_check_time);

    hwmon_check = 1;
  }
  #endif

  if ((runtime_check == 0) && (remove_check == 0) && (status_check == 0) && (restore_check == 0))
  {
    #if defined (HAVE_HWMON)
    if (hwmon_check == 0)
    #endif
    return (p);
  }

  while (data.shutdown_inner == 0)
  {
    hc_sleep (sleep_time);

    if (opencl_ctx->devices_status == STATUS_INIT) continue;

    #if defined (HAVE_HWMON)

    if (hwmon_check == 1)
    {
      hc_thread_mutex_lock (mux_hwmon);

      for (uint device_id = 0; device_id < opencl_ctx->devices_cnt; device_id++)
      {
        hc_device_param_t *device_param = &opencl_ctx->devices_param[device_id];

        if (device_param->skipped) continue;

        if (device_param->device_vendor_id == VENDOR_ID_NV)
        {
          if (data.hm_nvapi)
          {
            NV_GPU_PERF_POLICIES_INFO_PARAMS_V1   perfPolicies_info;
            NV_GPU_PERF_POLICIES_STATUS_PARAMS_V1 perfPolicies_status;

            memset (&perfPolicies_info,   0, sizeof (NV_GPU_PERF_POLICIES_INFO_PARAMS_V1));
            memset (&perfPolicies_status, 0, sizeof (NV_GPU_PERF_POLICIES_STATUS_PARAMS_V1));

            perfPolicies_info.version   = MAKE_NVAPI_VERSION (NV_GPU_PERF_POLICIES_INFO_PARAMS_V1, 1);
            perfPolicies_status.version = MAKE_NVAPI_VERSION (NV_GPU_PERF_POLICIES_STATUS_PARAMS_V1, 1);

            hm_NvAPI_GPU_GetPerfPoliciesInfo (data.hm_nvapi, data.hm_device[device_id].nvapi, &perfPolicies_info);

            perfPolicies_status.info_value = perfPolicies_info.info_value;

            hm_NvAPI_GPU_GetPerfPoliciesStatus (data.hm_nvapi, data.hm_device[device_id].nvapi, &perfPolicies_status);

            if (perfPolicies_status.throttle & 2)
            {
              if (slowdown_warnings < 3)
              {
                if (data.quiet == 0) clear_prompt ();

                log_info ("WARNING: Drivers temperature threshold hit on GPU #%d, expect performance to drop...", device_id + 1);

                if (slowdown_warnings == 2)
                {
                  log_info ("");
                }

                if (data.quiet == 0) send_prompt ();

                slowdown_warnings++;
              }
            }
            else
            {
              slowdown_warnings = 0;
            }
          }
        }
      }

      hc_thread_mutex_unlock (mux_hwmon);
    }

    if (hwmon_check == 1)
    {
      hc_thread_mutex_lock (mux_hwmon);

      time_t temp_check_time;

      time (&temp_check_time);

      uint Ta = temp_check_time - last_temp_check_time; // set Ta = sleep_time; is not good enough (see --remove etc)

      if (Ta == 0) Ta = 1;

      for (uint device_id = 0; device_id < opencl_ctx->devices_cnt; device_id++)
      {
        hc_device_param_t *device_param = &opencl_ctx->devices_param[device_id];

        if (device_param->skipped) continue;

        if ((opencl_ctx->devices_param[device_id].device_type & CL_DEVICE_TYPE_GPU) == 0) continue;

        const int temperature = hm_get_temperature_with_device_id (opencl_ctx, device_id);

        if (temperature > (int) data.gpu_temp_abort)
        {
          log_error ("ERROR: Temperature limit on GPU %d reached, aborting...", device_id + 1);

          myabort (opencl_ctx);

          break;
        }

        const int gpu_temp_retain = data.gpu_temp_retain;

        if (gpu_temp_retain)
        {
          if (data.hm_device[device_id].fan_set_supported == 1)
          {
            int temp_cur = temperature;

            int temp_diff_new = gpu_temp_retain - temp_cur;

            temp_diff_sum[device_id] = temp_diff_sum[device_id] + temp_diff_new;

            // calculate Ta value (time difference in seconds between the last check and this check)

            last_temp_check_time = temp_check_time;

            float Kp = 1.8f;
            float Ki = 0.005f;
            float Kd = 6;

            // PID controller (3-term controller: proportional - Kp, integral - Ki, derivative - Kd)

            int fan_diff_required = (int) (Kp * (float)temp_diff_new + Ki * Ta * (float)temp_diff_sum[device_id] + Kd * ((float)(temp_diff_new - temp_diff_old[device_id])) / Ta);

            if (abs (fan_diff_required) >= temp_threshold)
            {
              const int fan_speed_cur = hm_get_fanspeed_with_device_id (opencl_ctx, device_id);

              int fan_speed_level = fan_speed_cur;

              if (fan_speed_chgd[device_id] == 0) fan_speed_level = temp_cur;

              int fan_speed_new = fan_speed_level - fan_diff_required;

              if (fan_speed_new > fan_speed_max) fan_speed_new = fan_speed_max;
              if (fan_speed_new < fan_speed_min) fan_speed_new = fan_speed_min;

              if (fan_speed_new != fan_speed_cur)
              {
                int freely_change_fan_speed = (fan_speed_chgd[device_id] == 1);
                int fan_speed_must_change = (fan_speed_new > fan_speed_cur);

                if ((freely_change_fan_speed == 1) || (fan_speed_must_change == 1))
                {
                  if (device_param->device_vendor_id == VENDOR_ID_AMD)
                  {
                    hm_set_fanspeed_with_device_id_adl (device_id, fan_speed_new, 1);
                  }
                  else if (device_param->device_vendor_id == VENDOR_ID_NV)
                  {
                    #if defined (_WIN)
                    hm_set_fanspeed_with_device_id_nvapi (device_id, fan_speed_new, 1);
                    #endif

                    #if defined (__linux__)
                    hm_set_fanspeed_with_device_id_xnvctrl (device_id, fan_speed_new);
                    #endif
                  }

                  fan_speed_chgd[device_id] = 1;
                }

                temp_diff_old[device_id] = temp_diff_new;
              }
            }
          }
        }
      }

      hc_thread_mutex_unlock (mux_hwmon);
    }
    #endif // HAVE_HWMON

    if (restore_check == 1)
    {
      restore_left--;

      if (restore_left == 0)
      {
        if (data.restore_disable == 0) cycle_restore (opencl_ctx);

        restore_left = data.restore_timer;
      }
    }

    if ((runtime_check == 1) && (data.runtime_start > 0))
    {
      double ms_paused = data.ms_paused;

      if (opencl_ctx->devices_status == STATUS_PAUSED)
      {
        double ms_paused_tmp = 0;

        hc_timer_get (data.timer_paused, ms_paused_tmp);

        ms_paused += ms_paused_tmp;
      }

      time_t runtime_cur;

      time (&runtime_cur);

      int runtime_left = data.proc_start + data.runtime + data.prepare_time + (ms_paused / 1000) - runtime_cur;

      if (runtime_left <= 0)
      {
        if (data.benchmark == 0)
        {
          if (data.quiet == 0) log_info ("\nNOTE: Runtime limit reached, aborting...\n");
        }

        myabort (opencl_ctx);
      }
    }

    if (remove_check == 1)
    {
      remove_left--;

      if (remove_left == 0)
      {
        if (hashes->digests_saved != hashes->digests_done)
        {
          hashes->digests_saved = hashes->digests_done;

          save_hash ();
        }

        remove_left = data.remove_timer;
      }
    }

    if (status_check == 1)
    {
      status_left--;

      if (status_left == 0)
      {
        hc_thread_mutex_lock (mux_display);

        if (data.quiet == 0) clear_prompt ();

        if (data.quiet == 0) log_info ("");

        status_display (opencl_ctx, hashconfig, hashes);

        if (data.quiet == 0) log_info ("");

        hc_thread_mutex_unlock (mux_display);

        status_left = data.status_timer;
      }
    }
  }

  #if defined (HAVE_HWMON)
  myfree (fan_speed_chgd);

  myfree (temp_diff_old);
  myfree (temp_diff_sum);
  #endif

  p = NULL;

  return (p);
}