#!/usr/bin/env bash
# replacement for i3status for my FreeBSD setup
# I want to output
# ue0 | wlan0 | re0 | ZFS | RAM | SWAP | temp | time

interval=1

output_time() {
  date "+%d/%m/%Y %H:%M:%S"
}

output_battery() {
  read -r bat_state<<<$(echo "$hwstat_output" | awk '$1=="State:" { print $2 }' | tail -n 1)
  read -r bat_capacity<<<$(echo "$hwstat_output" | awk '$1=="Remaining" { print $3 }' | head -n 1)

  echo "BAT: $bat_capacity% $bat_state"
}

swap_to_mb() {
  echo $1 | awk '{ printf "%.2f\n", $1/1024; }'
}

bytes_to_mb() {
  echo $1 | awk '{ printf "%.2f\n", $1/1024/1024; }'
}

bytes_to_gb() {
  echo $1 | awk '{ printf "%.2f\n", $1/1024/1024/1024; }'
}

output_temp() {
  temp=$(echo "$hwstat_output" | awk '$1=="CPU0:" { print $2 }')

  echo "t: $temp"
}

output_swap() {
  read -r swap_used <<<$(swapinfo | awk 'NR==2 { print $3 }')
  echo "SWAP: $(swap_to_mb $swap_used) MiB"
}

output_ram() {
  free_output=$(free -h)
  read -r ram_all <<<$(echo "$free_output" | awk '$1=="mem_all:" { print $3  }')
  read -r ram_used <<<$(echo "$free_output" | awk '$1=="mem_used:" { print $2  }')

  echo "RAM: $(bytes_to_gb $ram_used)/$(bytes_to_gb $ram_all) GiB"
}

output_zfs() {
  read -r zfs_name zfs_size zfs_free<<<$(zpool list | awk 'NR==2 { print $1,$2,$4 }')
  echo "$zfs_name: $zfs_free free"
}

output_eth() {
  if_output=$(ifconfig $1 2> /dev/null)
  if_ret=$?

  read -r status <<<$(echo "$if_output" | awk '$1=="status:" { print $2,$3 }')

  if [ "$if_ret" -eq 0 ] && [ "$status" != "no carrier" ]; then
    read -r eth_ip<<<$(echo "$if_output" | awk '$1=="inet" { print $2  }')
    #read -r eth_type<<<$(echo "$if_output" | awk '$1=="media:" { print $2  }')
    read -r eth_media<<<$(echo "$if_output" | awk '$1=="media:" { print $4 }' | sed s/\(//)

    echo "$1: $eth_ip $eth_media"
  else
    echo "$1: offline"
  fi
}

output_wlan() {
  if_output=$(ifconfig $1 2> /dev/null)
  if_ret=$?

  read -r status <<<$(echo "$if_output" | awk '$1=="status:" { print $2,$3 }')

  if [ "$if_ret" -eq 0 ] && [ "$status" != "no carrier" ]; then 
    read -r eth_ip<<<$(echo "$if_output" | awk '$1=="inet" { print $2  }')
    #read -r eth_type<<<$(echo "$if_output" | awk '$1=="media:" { print $3  }')
    #read -r eth_media<<<$(echo "$if_output" | awk '$1=="media:" { print $4 }' | sed s/\(//)

    echo "$1: $eth_ip"
  else
    echo "$1: offline"
  fi
}

output_usb_eth() {
  if_output=$(ifconfig $1 2> /dev/null)
  if_ret=$?

  read -r status <<<$(echo "$if_output" | awk '$1=="status:" { print $2,$3 }')

  if [ "$if_ret" -eq 0 ] && [ "$status" != "no carrier" ]; then 
    read -r eth_ip<<<$(echo "$if_output" | awk '$1=="inet" { print $2  }')

    echo "$1: $eth_ip"
  else
    echo "$1: offline"
  fi
}


while true; do
  hwstat_output=$(hwstat)
  echo "$(output_usb_eth ue0) | $(output_wlan wlan0) | $(output_eth re0) | $(output_zfs) | $(output_ram) | $(output_swap) | $(output_temp) | $(output_battery) | $(output_time)";

  sleep $interval;
done