/*
htop - netbsd/Platform.c
(C) 2014 Hisham H. Muhammad
(C) 2015 Michael McConville
(C) 2021 Santhosh Raju
(C) 2021 htop dev team
Released under the GNU GPLv2, see the COPYING file
in the source distribution for its full text.
*/

#include "netbsd/Platform.h"

#include <errno.h>
#include <kvm.h>
#include <limits.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <sys/resource.h>
#include <sys/sysctl.h>
#include <sys/time.h>
#include <sys/types.h>

#include "CPUMeter.h"
#include "ClockMeter.h"
#include "DateMeter.h"
#include "DateTimeMeter.h"
#include "HostnameMeter.h"
#include "LoadAverageMeter.h"
#include "Macros.h"
#include "MemoryMeter.h"
#include "Meter.h"
#include "netbsd/NetBSDProcess.h"
#include "netbsd/NetBSDProcessList.h"
#include "ProcessList.h"
#include "Settings.h"
#include "SignalsPanel.h"
#include "SwapMeter.h"
#include "SysArchMeter.h"
#include "TasksMeter.h"
#include "UptimeMeter.h"
#include "XUtils.h"


const ProcessField Platform_defaultFields[] = { PID, USER, PRIORITY, NICE, M_VIRT, M_RESIDENT, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };

/*
 * See /usr/include/sys/signal.h
 */
const SignalItem Platform_signals[] = {
   { .name = " 0 Cancel",      .number =  0 },
   { .name = " 1 SIGHUP",      .number =  1 },
   { .name = " 2 SIGINT",      .number =  2 },
   { .name = " 3 SIGQUIT",     .number =  3 },
   { .name = " 4 SIGILL",      .number =  4 },
   { .name = " 5 SIGTRAP",     .number =  5 },
   { .name = " 6 SIGABRT",     .number =  6 },
   { .name = " 6 SIGIOT",      .number =  6 },
   { .name = " 7 SIGEMT",      .number =  7 },
   { .name = " 8 SIGFPE",      .number =  8 },
   { .name = " 9 SIGKILL",     .number =  9 },
   { .name = "10 SIGBUS",      .number = 10 },
   { .name = "11 SIGSEGV",     .number = 11 },
   { .name = "12 SIGSYS",      .number = 12 },
   { .name = "13 SIGPIPE",     .number = 13 },
   { .name = "14 SIGALRM",     .number = 14 },
   { .name = "15 SIGTERM",     .number = 15 },
   { .name = "16 SIGURG",      .number = 16 },
   { .name = "17 SIGSTOP",     .number = 17 },
   { .name = "18 SIGTSTP",     .number = 18 },
   { .name = "19 SIGCONT",     .number = 19 },
   { .name = "20 SIGCHLD",     .number = 20 },
   { .name = "21 SIGTTIN",     .number = 21 },
   { .name = "22 SIGTTOU",     .number = 22 },
   { .name = "23 SIGIO",       .number = 23 },
   { .name = "24 SIGXCPU",     .number = 24 },
   { .name = "25 SIGXFSZ",     .number = 25 },
   { .name = "26 SIGVTALRM",   .number = 26 },
   { .name = "27 SIGPROF",     .number = 27 },
   { .name = "28 SIGWINCH",    .number = 28 },
   { .name = "29 SIGINFO",     .number = 29 },
   { .name = "30 SIGUSR1",     .number = 30 },
   { .name = "31 SIGUSR2",     .number = 31 },
   { .name = "32 SIGPWR",      .number = 32 },
   { .name = "33 SIGRTMIN",    .number = 33 },
   { .name = "34 SIGRTMIN+1",  .number = 34 },
   { .name = "35 SIGRTMIN+2",  .number = 35 },
   { .name = "36 SIGRTMIN+3",  .number = 36 },
   { .name = "37 SIGRTMIN+4",  .number = 37 },
   { .name = "38 SIGRTMIN+5",  .number = 38 },
   { .name = "39 SIGRTMIN+6",  .number = 39 },
   { .name = "40 SIGRTMIN+7",  .number = 40 },
   { .name = "41 SIGRTMIN+8",  .number = 41 },
   { .name = "42 SIGRTMIN+9",  .number = 42 },
   { .name = "43 SIGRTMIN+10", .number = 43 },
   { .name = "44 SIGRTMIN+11", .number = 44 },
   { .name = "45 SIGRTMIN+12", .number = 45 },
   { .name = "46 SIGRTMIN+13", .number = 46 },
   { .name = "47 SIGRTMIN+14", .number = 47 },
   { .name = "48 SIGRTMIN+15", .number = 48 },
   { .name = "49 SIGRTMIN+16", .number = 49 },
   { .name = "50 SIGRTMIN+17", .number = 50 },
   { .name = "51 SIGRTMIN+18", .number = 51 },
   { .name = "52 SIGRTMIN+19", .number = 52 },
   { .name = "53 SIGRTMIN+20", .number = 53 },
   { .name = "54 SIGRTMIN+21", .number = 54 },
   { .name = "55 SIGRTMIN+22", .number = 55 },
   { .name = "56 SIGRTMIN+23", .number = 56 },
   { .name = "57 SIGRTMIN+24", .number = 57 },
   { .name = "58 SIGRTMIN+25", .number = 58 },
   { .name = "59 SIGRTMIN+26", .number = 59 },
   { .name = "60 SIGRTMIN+27", .number = 60 },
   { .name = "61 SIGRTMIN+28", .number = 61 },
   { .name = "62 SIGRTMIN+29", .number = 62 },
   { .name = "63 SIGRTMAX",    .number = 63 },
};

const unsigned int Platform_numberOfSignals = ARRAYSIZE(Platform_signals);

const MeterClass* const Platform_meterTypes[] = {
   &CPUMeter_class,
   &ClockMeter_class,
   &DateMeter_class,
   &DateTimeMeter_class,
   &LoadAverageMeter_class,
   &LoadMeter_class,
   &MemoryMeter_class,
   &SwapMeter_class,
   &TasksMeter_class,
   &UptimeMeter_class,
   &BatteryMeter_class,
   &HostnameMeter_class,
   &SysArchMeter_class,
   &AllCPUsMeter_class,
   &AllCPUs2Meter_class,
   &AllCPUs4Meter_class,
   &AllCPUs8Meter_class,
   &LeftCPUsMeter_class,
   &RightCPUsMeter_class,
   &LeftCPUs2Meter_class,
   &RightCPUs2Meter_class,
   &LeftCPUs4Meter_class,
   &RightCPUs4Meter_class,
   &LeftCPUs8Meter_class,
   &RightCPUs8Meter_class,
   &BlankMeter_class,
   NULL
};

void Platform_init(void) {
   /* no platform-specific setup needed */
}

void Platform_done(void) {
   /* no platform-specific cleanup needed */
}

void Platform_setBindings(Htop_Action* keys) {
   /* no platform-specific key bindings */
   (void) keys;
}

int Platform_getUptime() {
   struct timeval bootTime, currTime;
   const int mib[2] = { CTL_KERN, KERN_BOOTTIME };
   size_t size = sizeof(bootTime);

   int err = sysctl(mib, 2, &bootTime, &size, NULL, 0);
   if (err) {
      return -1;
   }
   gettimeofday(&currTime, NULL);

   return (int) difftime(currTime.tv_sec, bootTime.tv_sec);
}

void Platform_getLoadAverage(double* one, double* five, double* fifteen) {
   struct loadavg loadAverage;
   const int mib[2] = { CTL_VM, VM_LOADAVG };
   size_t size = sizeof(loadAverage);

   int err = sysctl(mib, 2, &loadAverage, &size, NULL, 0);
   if (err) {
      *one = 0;
      *five = 0;
      *fifteen = 0;
      return;
   }
   *one     = (double) loadAverage.ldavg[0] / loadAverage.fscale;
   *five    = (double) loadAverage.ldavg[1] / loadAverage.fscale;
   *fifteen = (double) loadAverage.ldavg[2] / loadAverage.fscale;
}

int Platform_getMaxPid() {
   // https://nxr.netbsd.org/xref/src/sys/sys/ansi.h#__pid_t
   // pid is assigned as a 32bit Integer.
   return INT32_MAX;
}

double Platform_setCPUValues(Meter* this, int cpu) {
   const NetBSDProcessList* pl = (const NetBSDProcessList*) this->pl;
   const CPUData* cpuData = &(pl->cpus[cpu]);
   double total = cpuData->totalPeriod == 0 ? 1 : cpuData->totalPeriod;
   double totalPercent;
   double* v = this->values;

   v[CPU_METER_NICE] = cpuData->nicePeriod / total * 100.0;
   v[CPU_METER_NORMAL] = cpuData->userPeriod / total * 100.0;
   if (this->pl->settings->detailedCPUTime) {
      v[CPU_METER_KERNEL]  = cpuData->sysPeriod / total * 100.0;
      v[CPU_METER_IRQ]     = cpuData->intrPeriod / total * 100.0;
      v[CPU_METER_SOFTIRQ] = 0.0;
      v[CPU_METER_STEAL]   = 0.0;
      v[CPU_METER_GUEST]   = 0.0;
      v[CPU_METER_IOWAIT]  = 0.0;
      v[CPU_METER_FREQUENCY] = NAN;
      this->curItems = 8;
      totalPercent = v[0] + v[1] + v[2] + v[3];
   } else {
      v[2] = cpuData->sysAllPeriod / total * 100.0;
      v[3] = 0.0; // No steal nor guest on NetBSD
      totalPercent = v[0] + v[1] + v[2];
      this->curItems = 4;
   }

   totalPercent = CLAMP(totalPercent, 0.0, 100.0);

   v[CPU_METER_TEMPERATURE] = NAN;

   return totalPercent;
}

void Platform_setMemoryValues(Meter* this) {
   const ProcessList* pl = this->pl;
   long int usedMem = pl->usedMem;
   long int buffersMem = pl->buffersMem;
   long int cachedMem = pl->cachedMem;
   usedMem -= buffersMem + cachedMem;
   this->total = pl->totalMem;
   this->values[0] = usedMem;
   this->values[1] = buffersMem;
   this->values[2] = cachedMem;
}

void Platform_setSwapValues(Meter* this) {
   const ProcessList* pl = this->pl;
   this->total = pl->totalSwap;
   this->values[0] = pl->usedSwap;
   this->values[1] = NAN;
}

char* Platform_getProcessEnv(pid_t pid) {
   char errbuf[_POSIX2_LINE_MAX];
   char* env;
   char** ptr;
   int count;
   kvm_t* kt;
   struct kinfo_proc* kproc;
   size_t capacity = 4096, size = 0;

   if ((kt = kvm_openfiles(NULL, NULL, NULL, KVM_NO_FILES, errbuf)) == NULL) {
      return NULL;
   }

   if ((kproc = kvm_getprocs(kt, KERN_PROC_PID, pid, &count)) == NULL) {
      (void) kvm_close(kt);
      return NULL;
   }

   if ((ptr = kvm_getenvv(kt, kproc, 0)) == NULL) {
      (void) kvm_close(kt);
      return NULL;
   }

   env = xMalloc(capacity);
   for (char** p = ptr; *p; p++) {
      size_t len = strlen(*p) + 1;

      if (size + len > capacity) {
         capacity *= 2;
         env = xRealloc(env, capacity);
      }

      String_safeStrncpy(env + size, *p, len);
      size += len;
   }

   if (size < 2 || env[size - 1] || env[size - 2]) {
      if (size + 2 < capacity)
         env = xRealloc(env, capacity + 2);
      env[size] = 0;
      env[size + 1] = 0;
   }

   (void) kvm_close(kt);
   return env;
}

char* Platform_getInodeFilename(pid_t pid, ino_t inode) {
    (void)pid;
    (void)inode;
    return NULL;
}

FileLocks_ProcessData* Platform_getProcessLocks(pid_t pid) {
    (void)pid;
    return NULL;
}

bool Platform_getDiskIO(DiskIOData* data) {
   // TODO
   (void)data;
   return false;
}

bool Platform_getNetworkIO(NetworkIOData* data) {
   // TODO
   (void)data;
   return false;
}

void Platform_getBattery(double* percent, ACPresence* isOnAC) {
   // TODO
   (void)percent;
   (void)isOnAC;
}