#!/bin/bash
#
#This script will automatically make an encrypted backup to a restic repository as specified with --source
#
helpFunction()
{
   echo ""
   echo "Usage: $0 -i INPUT -c CONFIG_DIR -l LOG_DIR"
   echo -e "\t-i Input folder that should be backed up."
   echo -e "\t-c Location of config directory containing repository, password and uuid files."
   echo -e "\t-l Location of where the log should be outputted to."
   echo -e "Example:"
   echo -e "If you pass -i ~/MyServices/SeRvIce1, then the directory you pass as -c must contain files service1_repository, service1_password and service1_uuid (note lower case)"
   exit 1 # Exit script after printing help
}

while getopts "i:c:l:" opt
do
   case "$opt" in
      i ) INPUT="$OPTARG" ;;
      c ) CONFIG_DIR="$OPTARG" ;;
      l ) LOG_DIR="$OPTARG" ;;
      ? ) helpFunction ;; # Print helpFunction in case parameter is non-existent
   esac
done

# Print helpFunction in case parameters are empty
if [ -z "$INPUT" ] || [ -z "$CONFIG_DIR" ] || [ -z "$LOG_DIR" ]
then
   echo "Some or all of the parameters are empty";
   helpFunction
fi

# Begin script in case all parameters are correct

# Set environment variables
set -a && source .env && set +a

SERVICE=${INPUT##*/}
SERVICE=${SERVICE,,}
DATE=$(date +%Y-%m-%d_%H%M%S)
LOG_FILE="${LOG_DIR}/${SERVICE}_${DATE}.log"



REPOSITORY_FILE="${CONFIG_DIR}/${SERVICE}_repository"
PASSWORD_FILE="${CONFIG_DIR}/${SERVICE}_password"
UUID_FILE="${CONFIG_DIR}/${SERVICE}_uuid"

echo -e "--- START OF BACKUP FOR ${SERVICE^^} - ${DATE} ---\n\n" > $LOG_FILE
restic backup $INPUT --verbose --repository-file $REPOSITORY_FILE --password-file $PASSWORD_FILE >> $LOG_FILE

echo -e "\n\n Current snapshots:\n\n" >> $LOG_FILE
restic snapshots --verbose --repository-file $REPOSITORY_FILE --password-file $PASSWORD_FILE >> $LOG_FILE

echo -e "\n\n Health check:\n\n" >> $LOG_FILE
restic check --verbose --repository-file $REPOSITORY_FILE --password-file $PASSWORD_FILE >> $LOG_FILE

echo -e "\n\n Move to external storage:\n\n" >> $LOG_FILE
rsync -rahPv --delete-after -e "ssh -p ${EXTERNAL_STORAGE_PORT}" "$(<$REPOSITORY_FILE)" $EXTERNAL_STORAGE_USER@$EXTERNAL_STORAGE_URL:$EXTERNAL_STORAGE_ROOT_DIR/"$(<$UUID_FILE)" >> $LOG_FILE