#!/bin/bash
# shellcheck disable=SC1091
source "${AGENT_PATH}/common.sh"
_check_required_env_vars "CONTAINER_NAME" "BACKUP_FILE" "TEMP_DIR"

if ! lxc info "${CONTAINER_NAME}" &>/dev/null; then
    _die "Container ${CONTAINER_NAME} does not exist."
fi

mkdir -p "${TEMP_DIR}/backup"

# Export tailscale state from the container
echo "Backing up Tailscale state..."
lxc exec "${CONTAINER_NAME}" -- tar -czf /tmp/tailscale-state.tgz -C /var/lib/tailscale . 2>/dev/null || _die "Failed to archive tailscale state"
lxc file pull "${CONTAINER_NAME}/tmp/tailscale-state.tgz" "${TEMP_DIR}/backup/tailscale-state.tgz" || _die "Failed to pull backup from container"
lxc exec "${CONTAINER_NAME}" -- rm -f /tmp/tailscale-state.tgz

tar -czf "${BACKUP_FILE}" -C "${TEMP_DIR}/backup" .

echo "Backup completed successfully"