scan

#!/usr/bin/env bash
# CyberPower PDU Bridge
# Created by Matthew Valancy, Valpatel Software LLC
# Copyright 2026 GPL-3.0 License
# https://github.com/mvalancy/CyberPower-PDU
set -euo pipefail

cd "$(dirname "$0")"
source lib/common.sh

check_help "${1:-}" "./scan" "Discover CyberPower PDUs on the network" \
"Usage: ./scan [--subnet 192.168.1.0/24] [--community public]

Scans a subnet for CyberPower PDUs via SNMP and prints a
table of discovered devices with model, serial, and outlet count.

Options:
  --subnet CIDR       Subnet to scan (default: auto-detect)
  --community STRING  SNMP community string (default: public)
  --timeout SECONDS   Per-host timeout (default: 1)

Examples:
  ./scan
  ./scan --subnet 192.168.20.0/24
  ./scan --subnet 10.0.0.0/24 --community private"

setup_log "scan"
banner

# Parse arguments
SUBNET=""
COMMUNITY="public"
TIMEOUT="1"

while [ $# -gt 0 ]; do
    case "$1" in
        --subnet) SUBNET="$2"; shift 2 ;;
        --community) COMMUNITY="$2"; shift 2 ;;
        --timeout) TIMEOUT="$2"; shift 2 ;;
        *) error "Unknown argument: $1"; exit 1 ;;
    esac
done

# Try running via Docker first, fall back to native Python
if docker compose ps bridge --format '{{.Name}}' 2>/dev/null | grep -q bridge; then
    step "Scanning for CyberPower PDUs via Docker"
    ARGS="--community $COMMUNITY --timeout $TIMEOUT"
    [ -n "$SUBNET" ] && ARGS="$ARGS --subnet $SUBNET"
    docker compose exec bridge python -m bridge.src.discovery $ARGS
elif python3 -c "import pysnmp" 2>/dev/null; then
    step "Scanning for CyberPower PDUs (native Python)"
    ARGS="--community $COMMUNITY --timeout $TIMEOUT"
    [ -n "$SUBNET" ] && ARGS="$ARGS --subnet $SUBNET"
    python3 -m bridge.src.discovery $ARGS
else
    error "Cannot run scan — either start the stack (./start) or install pysnmp-lextudio"
    info "  pip install pysnmp-lextudio"
    exit 1
fi

echo ""
success "Log saved to $LOG_FILE"