#!/bin/bash
set -u

function parse_log {
  # do not consider unset variables as an error
  set +u
  log="$@"
  current_repo=''
  repo_ok=0
  check_log=''
  echo -e "$log" | while read l;do
    matched_repo=$(echo $l | grep -oP "(?<=BEGIN REPO CHECK: ).*")
    if [ ! -z "$matched_repo" ];then
      current_repo="$matched_repo"
    fi
    end_matched_repo=$(echo $l | grep -oP "(?<=END REPO CHECK: ).*")
    if [ ! -z "$end_matched_repo" ];then
      if [ "$repo_ok" -eq "1" ];then
        echo -e "\n==> [OK] $current_repo"
      else
        echo -e "\n==> [ERROR] $current_repo"
        echo -e "$current_log\n$l"
      fi
      current_repo=""
      repo_ok=0
      current_log=""
      continue
    fi
    echo $l | grep -q "no errors were found"
    if [ "$?" -eq 0 ];then
      repo_ok=1
    fi
    if [ "$current_repo" != "" ];then
      if [ -z "$current_log" ];then
        current_log="${l}"
      else
        current_log="$current_log\n${l}"
      fi
    fi
  done
  set -u
}

COMPLETE_CHECK=${1:-0}

hostname=$(hostname)
if [ "$COMPLETE_CHECK" -eq "0" ];then
  subject="YunoHost Restic check log on ${hostname}"
  invocation_id=$(systemctl show -p InvocationID --value {{ app }}_check.service)
else
  subject="YunoHost Restic complete check log on ${hostname}"
  invocation_id=$(systemctl show -p InvocationID --value {{ app }}_check_read_data.service)
fi
check_log=$(sudo /bin/journalctl _SYSTEMD_INVOCATION_ID=${invocation_id})
parsed_log=$(parse_log "$check_log")
echo "$parsed_log" | grep -q '\[ERROR\]'
if [ "$?" -eq "0" ];then
  subject="${subject} (FAILED)"
else
  subject="${subject} (SUCCESS)"
fi

parsed_log="$parsed_log\n\nTo get more detailed info check the log files /var/log/restic_check_{{ app }}.log and /var/log/restic_check_{{ app }}.err"

echo -e "${parsed_log}" | mail -s "${subject}" root