#!/bin/bash
# get info about time zone and ntpd status
# options:
# action=status
export LANG="en_US.UTF-8"

CFG_SYSCLOCK="/etc/sysconfig/clock" # file controls the interpretation of values read from the system hardware clock
CFG_LOCALTIME="/etc/localtime"      # file configures the system-wide timezone of the local system
                                    # that is used by applications for presentation to the user
TZ_DB="/usr/share/zoneinfo"         # standart path for timezone database

TZ_DEFAULT="Europe/Moscow"          # default timezone ( use if not found the settings in the system )

CFG_PHP="/etc/php.d/bitrixenv.ini"   # bitrixenv php file

# get config form sysconfig
get_current_timezone_from_clock() {
  TZ_CLOCK=""
  if [[ -f $CFG_SYSCLOCK ]]; then
    TZ_CLOCK=$(grep -v '^#\|^$' $CFG_SYSCLOCK | awk -F'=' '/ZONE=/{print $2}' | sed -e "s:[\"\' ]::g" )
  else
    TZ_CLOCK="SYSCLOCK_NOT_FOUND"
  fi

  echo -n $TZ_CLOCK

}

# get current timezone from localtime
get_current_timzone() {

  TZ_TIME=""

  # link
  if [[ -L $CFG_LOCALTIME ]]; then
    TZ_TIME=$(readlink -f $CFG_LOCALTIME | sed -e "s:^$TZ_DB/::")
  else
    # file
    if [[ -f $CFG_LOCALTIME ]]; then
      MD5_LOCALTIME="$(md5sum $CFG_LOCALTIME | awk '{print $1}')"

      # check the md5sum of all files in a directory
      while read LINE; do
        MD5_FOUND="$(md5sum "${LINE}" | awk '{print $1}')"
        #echo ${LINE} ${MD5_FOUND}

        if [[ "${MD5_LOCALTIME}" == "${MD5_FOUND}" ]]; then
          TZ_TIME=$(echo "${LINE}" | sed -e "s:^$TZ_DB/::" )
        fi

      done < <( find $TZ_DB -type f )

      # if not found
      [[ -z "$TZ_TIME" ]] && TZ_TIME="LOCALTIME_NOT_FOUND"

    # not exists
    else
      TZ_TIME="LOCALTIME_NOT_FOUND"
    fi
  fi

  echo -n $TZ_TIME
}

# get tz from bitrixenv
get_php_tz() {
  PHP_TZ=""
  if [[ -f $CFG_PHP ]]; then
    PHP_TZ=$(grep '^date.timezone' $CFG_PHP | awk -F'=' '{print $2}' | sed -s 's/^\s\+//;s/\s\+$//')
  fi
  if [[ -z "$PHP_TZ" ]]; then
    echo "not_defined"
  else
    echo $PHP_TZ
  fi
}


# print error message
print_error() {
  msg=$1
  echo "{\"changed\":false,\"failed\":true,\"msg\":\"$msg\"}"
  exit 1
}

# print timezone info
print_message() {
  tz=$1
  tz_php=$2
  changed=$3
  default=$4

  [[ -z "$changed" ]] && changed="false"
  [[ -z "$default" ]] && default="false"

  echo "{\"changed\":$changed,\"ansible_facts\":{\"tz\":\"$tz\",\"tz_php\":\"$tz_php\",\"tz_default\":$default}}"
  exit 0
}

# get ansible options
source ${1}

# action=status|set set=TIMEZONE httpd=yes|no
# default values
[[ -z "$action" ]] && action=status

# start process
case $action in
"status")
  TZ1=$(get_current_timzone)
  TZ2=$(get_current_timezone_from_clock)
  TZ_PHP=$(get_php_tz)
  
  # test if TZ found
  [[ $( echo "$TZ1" | grep -c 'NOT_FOUND') -eq 0 ]] && print_message "$TZ1" "$TZ_PHP"
  [[ $( echo "$TZ2" | grep -c 'NOT_FOUND') -eq 0 ]] && print_message "$TZ2" "$TZ_PHP"
  print_message "$TZ_DEFAULT" "$TZ_PHP" "" "true"
;;
*)
  print_error "Option action=$action is not valid"
;;
esac