#!/bin/sh
set -eu

PROJECT_DIR=$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)
cd "$PROJECT_DIR"

CONTAINER_ID=$(docker compose ps -q minio)
if [ -z "$CONTAINER_ID" ]; then
    echo "Error: The MineSeeker MinIO service is not running."
    exit 1
fi

VOLUME_NAME=$(docker inspect "$CONTAINER_ID" --format '{{range .Mounts}}{{if eq .Destination "/data"}}{{.Name}}{{end}}{{end}}')
if [ -z "$VOLUME_NAME" ]; then
    echo "Error: Could not determine the MinIO data volume."
    exit 1
fi

BACKUP_DIR=${1:-"$PROJECT_DIR/backups"}
mkdir -p "$BACKUP_DIR"
BACKUP_DIR=$(CDPATH= cd -- "$BACKUP_DIR" && pwd)
TIMESTAMP=$(date +%Y-%m-%d.%H%M%S)
BACKUP_FILE="mineseeker-minio.${TIMESTAMP}.tar.gz"
BACKUP_PATH="$BACKUP_DIR/$BACKUP_FILE"

umask 077

restart_minio() {
    docker compose start minio || echo "Warning: Failed to restart MinIO."
}
trap restart_minio EXIT

echo "Stopping MinIO for a consistent backup..."
docker compose stop minio

echo "Creating MinIO backup: $BACKUP_PATH"
docker run --rm \
    --volume "$VOLUME_NAME:/data:ro" \
    --volume "$BACKUP_DIR:/backup" \
    busybox tar czf "/backup/$BACKUP_FILE" -C /data .

echo "Backup complete: $BACKUP_PATH"