#!/bin/sh
set -eu

BASE_DIR="/usr/local/hitme_plugins/global-autoresponders"
STATE_FILE="$BASE_DIR/config/backend-state.json"

usage() {
  echo "Usage: scripts/backend.sh da|exim" >&2
}

if [ "${1:-}" != "da" ] && [ "${1:-}" != "exim" ]; then
  usage
  exit 2
fi

mkdir -p "$BASE_DIR/config" "$BASE_DIR/data" "$BASE_DIR/state" "$BASE_DIR/logs"
chmod 700 "$BASE_DIR/config" "$BASE_DIR/logs"

if [ "$1" = "da" ]; then
  cat > "$STATE_FILE" <<'EOF'
{"active_backend":"da","migration_status":"complete"}
EOF
  echo "Backend set to da"
  exit 0
fi

CUSTOM_DIR="/usr/local/directadmin/custombuild/custom/exim"
if [ ! -d "$CUSTOM_DIR" ]; then
  echo "Cannot enable exim backend: safe CustomBuild exim customization directory not found." >&2
  exit 1
fi

cat > "$STATE_FILE" <<'EOF'
{"active_backend":"exim","migration_status":"pending_exim_validation"}
EOF
echo "Backend prepared for exim; validate Exim customization before production use."