#!/bin/sh
set -eu

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

if [ "$#" -ne 1 ]; then
    echo "Usage: $0 <backup-file>"
    echo "Example: $0 backups/mineseeker-minio.2026-08-18.120000.tar.gz"
    exit 1
fi

BACKUP_FILE=$1
if [ ! -f "$BACKUP_FILE" ]; then
    echo "Error: Backup file not found: $BACKUP_FILE"
    exit 1
fi

BACKUP_DIR=$(CDPATH= cd -- "$(dirname -- "$BACKUP_FILE")" && pwd)
BACKUP_NAME=$(basename "$BACKUP_FILE")

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

echo "Verifying MinIO archive..."
docker run --rm \
    --volume "$BACKUP_DIR:/backup:ro" \
    busybox tar -tzf "/backup/$BACKUP_NAME" > /dev/null
echo "Archive OK."

printf 'WARNING: This erases all current MineSeeker MinIO data. Type yes to continue: '
read -r CONFIRM
if [ "$CONFIRM" != 'yes' ]; then
    echo "Aborted."
    exit 1
fi

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

echo "Stopping MinIO before restore..."
docker compose stop minio

echo "Restoring MinIO backup: $BACKUP_FILE"
docker run --rm \
    --volume "$VOLUME_NAME:/data" \
    --volume "$BACKUP_DIR:/backup:ro" \
    busybox sh -c 'find /data -mindepth 1 -maxdepth 1 -exec rm -rf {} + && tar xzf "/backup/$1" -C /data' sh "$BACKUP_NAME"

echo "Restore complete."