#!/usr/bin/env bash

SLACK_CHANNEL="$1"
SLACK_USERNAME="Naemon"
SLACK_URL="$2"
SLACK_USERICON="https://assets.immae.eu/monitoring.png"

if [ "$SERVICESTATE" = "CRITICAL" ]; then
  ICON=":exclamation:"
  COLOR="#DA0505"
elif [ "$SERVICESTATE" = "WARNING" ]; then
  ICON=":warning:"
  COLOR="#F1E903"
elif [ "$SERVICESTATE" = "OK" ]; then
  ICON=":white_check_mark:"
  COLOR="#36a64f"
elif [ "$SERVICESTATE" = "UNKNOWN" ]; then
  ICON=":question:"
  COLOR="#000000"
else
  ICON=":white_medium_square:"
  COLOR="#ffffff"
fi

payload=$(echo "{}" | jq -r \
  --arg "icon_url" "$SLACK_USERICON" \
  --arg "channel"  "$SLACK_CHANNEL" \
  --arg "username" "$SLACK_USERNAME" \
  --arg "text" "${ICON} ${SERVICEDESC} on ${HOST} is ${SERVICESTATE}" \
  --arg "color" "$COLOR" \
  --arg "host" "$HOST" \
  --arg "desc" "$SERVICEDESC" \
  --arg "state" "$SERVICESTATE" \
  --arg "output" "$SERVICEOUTPUT" \
  '.icon_url = $icon_url |
   .channel = $channel |
   .username = $username |
   .text = $text |
   .attachments = [{fallback:"", color:$color,fields: [{},{},{},{}]}] |
   .attachments[0].fields[0] = {title:"Host",value:$host,short:true} |
   .attachments[0].fields[1] = {title:"Service description",value:$desc,short:true} |
   .attachments[0].fields[2] = {title:"Status",value:$state,short:true} |
   .attachments[0].fields[3] = {title:"Message",value:$output,short:false}
   ')

curl -X POST --data "payload=$payload" $SLACK_URL