usage() {
    echo "Usage: run-vm <hostname> [--networking] [--dummy-secrets] [--no-disko]"
    echo "ATTENTION: This script must be run from the flakes root directory"
    echo "--networking setup interfaces. requires root and hostbridge enabled on the host"
    echo "--dummy-secrets run vm with dummy sops secrets"
    echo "--no-disko disable disko and initrd secrets. needed for real hosts like fanny"
    echo "--writable-store enables writable store. necessary for host with nested imperative microvms like fanny"
    echo "--var path to directory that should be shared as /var. may require root otherwise some systemd units fail within vm. if dir is empty vm will populate"
    echo "--data path to directory that should be shared as /data"
    echo "--fwd-port forwards the given port to port 80 on vm"
    exit 1
}

# check at least one arg was given
if [ "$#" -lt 1 ]; then
    usage
fi

HOSTNAME=$1

# Optionale Argumente
NETWORK=false
DUMMY_SECRETS=false
NO_DISKO=false
RW_STORE=false
VAR_PATH=""
DATA_PATH=""
FWD_PORT=0

# check argws
shift
while [[ "$#" -gt 0 ]]; do
    case $1 in
        --networking) NETWORK=true ;;
        --dummy-secrets) DUMMY_SECRETS=true ;;
        --no-disko) NO_DISKO=true ;;
        --writable-store) RW_STORE=true ;;
        --var) 
          if [[ -n "$2" && ! "$2" =~ ^- ]]; then
              VAR_PATH="$2"
              shift
          else
              echo "Error: --var requires a non-empty string argument."
              usage
          fi
          ;;
        --data) 
          if [[ -n "$2" && ! "$2" =~ ^- ]]; then
              DATA_PATH="$2"
              shift
          else
              echo "Error: --data requires a non-empty string argument."
              usage
          fi
          ;;
        --fwd-port) 
          if [[ -n "$2" && ! "$2" =~ ^- ]]; then
              FWD_PORT="$2"
              shift
          else
              echo "Error: --var requires a non-empty string argument."
              usage
          fi
          ;;
        *) echo "Unknown argument: $1"; usage ;;
    esac
    shift
done
echo "starting host $HOSTNAME"
echo "enable networking: $NETWORK"
echo "deploy dummy secrets: $DUMMY_SECRETS"
echo "disable disko and initrd secrets: $NO_DISKO"
echo "use writable store: $RW_STORE"
if [ -n "$VAR_PATH" ]; then
  echo "sharing var directory: $VAR_PATH"
fi

if [ -n "$DATA_PATH" ]; then
  echo "sharing data directory: $DATA_PATH"
fi

nix run --show-trace --impure --expr "((builtins.getFlake \"$(pwd)\").vmBuilder.x86_64-linux \"$HOSTNAME\" $NETWORK $DUMMY_SECRETS $NO_DISKO \"$VAR_PATH\" \"$DATA_PATH\" $RW_STORE $FWD_PORT).config.microvm.declaredRunner"