#!/usr/bin/env bash
# scripts/pre-flight-checks.sh
#
# STATUS: PLACEHOLDER — drafted alongside deploy runbook.
#
# Pre-deploy sanity check. Reads-only; no state changes. Run before
# `juju deploy` to surface issues that would cause the deploy to fail
# during settle.
#
# Exit codes:
#   0  all checks pass
#   1  fatal — do not deploy
#   2  warning — review then decide

set -euo pipefail

# Strict mode hardening
shopt -s inherit_errexit 2>/dev/null || true
IFS=$'\n\t'

FATAL=0
WARN=0

fail()  { echo "FAIL: $*" >&2; FATAL=$((FATAL+1)); }
warn()  { echo "WARN: $*" >&2; WARN=$((WARN+1)); }
pass()  { echo "PASS: $*"; }
note()  { echo "NOTE: $*"; }

# TODO during drafting:
#   - Juju controller reachable
#   - MAAS API reachable; machines in expected state
#   - NetBox reachable; VR0 DC0 prefixes/VLANs present (use --verify-only on imports)
#   - jumphost /etc/hosts contains all expected API VIP hostnames
#   - All KVM VMs (openstack0-3) reachable and Ready in MAAS
#   - capi-mgmt.maas k3s healthy
#   - Vault unseal keys present and readable
#   - Disk space on /var/lib/libvirt/images sufficient for snapshots
#   - bundle.yaml parses as valid YAML
#   - overlay parses as valid YAML
#   - Channel pins in bundle resolvable on Charmhub

note "Placeholder pre-flight script — not yet implemented."

echo
echo "Summary: ${FATAL} fatal, ${WARN} warning"
if [[ $FATAL -gt 0 ]]; then
  exit 1
elif [[ $WARN -gt 0 ]]; then
  exit 2
fi
exit 0