#!/bin/bash
# /opt/backup/daily_folder_backup.sh

BACKUP_DIR="/opt/backup"
RETENTION_DAYS=3
DATE=$(date +'%Y-%m-%d')

FOLDERS=(
  "/opt/nextcloud"
  "/opt/odoo"
  "/opt/paperless"
)

STATUS=0
FAILED_LIST=()

for SRC in "${FOLDERS[@]}"; do
  BASENAME=$(basename "$SRC")
  DEST="${BACKUP_DIR}/${DATE}_${BASENAME}.tar.gz"

  tar -czf "$DEST" "$SRC" 2>/dev/null
  if [ $? -ne 0 ]; then
    STATUS=1
    FAILED_LIST+=("$BASENAME")
  fi
done

find "$BACKUP_DIR" -type f -name "*.tar.gz" -mtime +"$RETENTION_DAYS" -exec rm {} \;

# JSON-Ausgabe erzeugen
if [ $STATUS -eq 0 ]; then
  echo "{\"status\": \"success\", \"failed\": []}"
else
  FAILED_JSON=$(printf '"%s",' "${FAILED_LIST[@]}")
  FAILED_JSON="[${FAILED_JSON%,}]"
  echo "{\"status\": \"error\", \"failed\": $FAILED_JSON}"
fi

exit $STATUS