#!/bin/bash

TIMESTAMP=$(date +%Y-%m-%d_%H-%M-%S)
BACKUP_FILE="${MONGO_INITDB_DATABASE}_${TIMESTAMP}.dump.tar.gz"
TEMP_DUMP="/tmp/mongo_dump_${TIMESTAMP}"

# Create & zip backup
mkdir -p "$BACKUP_DIR"
mongodump --host localhost --db "$MONGO_INITDB_DATABASE" -u "$MONGO_INITDB_ROOT_USERNAME" -p "$MONGO_INITDB_ROOT_PASSWORD" --out "$TEMP_DUMP"
tar -czf "${BACKUP_DIR}/${BACKUP_FILE}" -C "$TEMP_DUMP" .
rm -rf "$TEMP_DUMP"

# Remove old backups
if [[ -n "$BACKUP_RETENTION" ]]; then
	cd "$BACKUP_DIR"
	ls -1t ${MONGO_INITDB_DATABASE}_*.dump.tar.gz 2>/dev/null | tail -n +$((BACKUP_RETENTION + 1)) | xargs -r rm -f
fi