#!/bin/sh
if [ -z "$SCW_ACCESS_KEY" ] || [ -z "$SCW_SECRET_KEY" ]; then
  echo "SCW_ACCESS_KEY and SCW_SECRET_KEY must be set"
  exit 1
fi
if [ -z "$BUCKET_NAME" ]; then
  echo "BUCKET_NAME must be set"
  exit 1
fi
if [ -z "$APP_NAME" ]; then
  echo "APP_NAME must be set"
  exit 1
fi
if [ -z "$BACKUP_RETENTION" ]; then
  echo "BACKUP_RETENTION must be set"
  exit 1
fi

# install required packages
apk update
apk add gettext

# Create rclone config (Scaleway)
envsubst < /etc/rclone.conf.tmpl > /tmp/rclone.conf
unset SCW_ACCESS_KEY
unset SCW_SECRET_KEY

# Create backup
echo "Creating backup of /src directory"
tar -zcvpf /backup/$APP_NAME-files-`date +"%Y%m%d"`.tar.gz /src

# Remove old backups
BACKUP_FILE_PATTERN="$APP_NAME-files-*.tar.gz"
echo "Removing old backups matching pattern: $BACKUP_FILE_PATTERN"
find /backup -type f -name "$BACKUP_FILE_PATTERN" -mtime +$BACKUP_RETENTION | xargs --no-run-if-empty rm

# Upload to Scaleway
echo "Uploading backup to Scaleway bucket"
/usr/local/bin/rclone --config=/tmp/rclone.conf sync --progress /backup "scaleway:$BUCKET_NAME/$APP_NAME-backup"
