#!/bin/bash

# RESTORE SCRIPT
# The restore script is OPTIONAL.
# It is used to restore the service on the server from a backup file.
# It is called with one argument: the path to the backup file.

source "$(dirname "$0")/_common.sh"
check_required_env_vars "CONTAINER_NAME" "VOLUME_NAME"

# Get backup file path from first argument
BACKUP_FILE="$1"
if [ -z "$BACKUP_FILE" ]; then
    die "Backup file path not provided"
fi

TEMP_DIR=$2
if [ -z "$TEMP_DIR" ]; then
    die "Temporary directory not provided"
fi

# Check if backup file already exists
if [ ! -f "$BACKUP_FILE" ]; then
    die "Backup file $BACKUP_FILE does not exist"
fi

# # Stop container before backup
bash ./uninstall.sh || die "Failed to uninstall service before restore"

# Remove existing data folder
echo "Deleting ALL data in $VOLUME_NAME."

docker run --rm -v ${VOLUME_NAME}:/data alpine sh -c "\
rm -rf /data/*"

echo "Restoring data from $BACKUP_FILE to $VOLUME_NAME."
docker run --rm \
    -v ${VOLUME_NAME}:/data \
    -v ${BACKUP_FILE}:/backup.tar.gz \
    alpine sh -c "\
        tar xzvf /backup.tar.gz -C /data --strip-components=1"

# reinstall service - ensure everything is latest.
bash ./install.sh || die "Failed to reinstall service after restore"

echo "Restore complete! Service is running again on port $HOST_PORT with restored content."