/*
 * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
 *
 * This program is free software: you can use, redistribute, and/or modify
 * it under the terms of the GNU Affero General Public License, version 3
 * or later ("AGPL"), as published by the Free Software Foundation.
 *
 * 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.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#define _DEFAULT_SOURCE
#include "osEnv.h"

char            configDir[PATH_MAX] = {0};
char            tsDataDir[PATH_MAX] = {0};
char            tsLogDir[PATH_MAX] = {0};
char            tsTempDir[PATH_MAX] = {0};
SDiskSpace      tsDataSpace = {0};
SDiskSpace      tsLogSpace = {0};
SDiskSpace      tsTempSpace = {0};
char            tsOsName[16] = {0};
char            tsTimezoneStr[TD_TIMEZONE_LEN] = {0};
enum TdTimezone tsTimezone = TdZeroZone;
char            tsLocale[TD_LOCALE_LEN] = {0};
char            tsCharset[TD_CHARSET_LEN] = {0};
int8_t          tsDaylight = 0;
bool            tsEnableCoreFile = 0;
int64_t         tsPageSizeKB = 0;
int64_t         tsOpenMax = 0;
int64_t         tsStreamMax = 0;
float           tsNumOfCores = 0;
int64_t         tsTotalMemoryKB = 0;
char*           tsProcPath = NULL;

void osDefaultInit() {
  taosSeedRand(taosSafeRand());
  taosGetSystemLocale(tsLocale, tsCharset);
  taosGetSystemTimezone(tsTimezoneStr, &tsTimezone);
  taosSetSystemTimezone(tsTimezoneStr, tsTimezoneStr, &tsDaylight, &tsTimezone);
  taosGetSystemInfo();

  // deadlock in query
  if (tsNumOfCores < 2) {
    tsNumOfCores = 2;
  }

#ifdef WINDOWS
  taosWinSocketInit();

  const char *tmpDir = getenv("tmp");
  if (tmpDir == NULL) {
    tmpDir = getenv("temp");
  }
  if (tmpDir != NULL) {
    strcpy(tsTempDir, tmpDir);
  }

  if (configDir[0] == 0) {
    strcpy(configDir, "C:\\TDengine\\cfg");
  }
  strcpy(tsDataDir, "C:\\TDengine\\data");
  strcpy(tsLogDir, "C:\\TDengine\\log");
  strcpy(tsTempDir, "C:\\Windows\\Temp");
  strcpy(tsOsName, "Windows");

#elif defined(_TD_DARWIN_64)
  if (configDir[0] == 0) {
    strcpy(configDir, "/usr/local/etc/taos");
  }
  strcpy(tsDataDir, "/usr/local/var/lib/taos");
  strcpy(tsLogDir, "/usr/local/var/log/taos");
  strcpy(tsTempDir, "/tmp/taosd");
  strcpy(tsOsName, "Darwin");

#else
  if (configDir[0] == 0) {
    strcpy(configDir, "/etc/taos");
  }
  strcpy(tsDataDir, "/var/lib/taos");
  strcpy(tsLogDir, "/var/log/taos");
  strcpy(tsTempDir, "/tmp");
  strcpy(tsOsName, "Linux");

#endif
}

void osUpdate() {
  if (tsLogDir[0] != 0) {
    taosGetDiskSize(tsLogDir, &tsLogSpace.size);
  }
  if (tsDataDir[0] != 0) {
    taosGetDiskSize(tsDataDir, &tsDataSpace.size);
  }
  if (tsTempDir[0] != 0) {
    taosGetDiskSize(tsTempDir, &tsTempSpace.size);
  }
}

void osCleanup() {}

bool osLogSpaceAvailable() { return tsLogSpace.reserved <= tsLogSpace.size.avail; }

bool osDataSpaceAvailable() { return tsDataSpace.reserved <= tsDataSpace.size.avail; }

bool osTempSpaceAvailable() { return tsTempSpace.reserved <= tsTempSpace.size.avail; }

void osSetTimezone(const char *timezone) { taosSetSystemTimezone(timezone, tsTimezoneStr, &tsDaylight, &tsTimezone); }

void osSetSystemLocale(const char *inLocale, const char *inCharSet) {
  memcpy(tsLocale, inLocale, strlen(inLocale) + 1);
  memcpy(tsCharset, inCharSet, strlen(inCharSet) + 1);
}