#!/usr/bin/env bash
# bin/railiance — thin dispatcher; subcommands live in tools/cmd/*
set -euo pipefail

ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
PATH="${ROOT}/tools/cmd:${PATH}"

resolve_rail_kubernetes_bin() {
  if [[ -n "${RAILIANCE_RAIL_KUBERNETES_BIN:-}" ]]; then
    if [[ -x "${RAILIANCE_RAIL_KUBERNETES_BIN}" ]]; then
      printf '%s\n' "${RAILIANCE_RAIL_KUBERNETES_BIN}"
      return 0
    fi
    echo "ERROR: RAILIANCE_RAIL_KUBERNETES_BIN is not executable: ${RAILIANCE_RAIL_KUBERNETES_BIN}" >&2
    return 2
  fi

  local sibling="${ROOT}/../rail-kubernetes/bin/railiance"
  if [[ -x "${sibling}" ]]; then
    printf '%s\n' "${sibling}"
    return 0
  fi

  return 1
}

run_compat_command() {
  local cmd="$1"
  shift || true

  local delegate_bin=""
  local resolve_status=0
  if delegate_bin="$(resolve_rail_kubernetes_bin)"; then
    exec "${delegate_bin}" "${cmd}" "$@"
  else
    resolve_status=$?
  fi

  if [[ "${resolve_status}" -eq 2 ]]; then
    exit 1
  fi

  echo "WARN: rail-kubernetes delegate not found; using compatibility implementation from railiance-cluster" >&2
  case "${cmd}" in
    create-overlay) bash "$ROOT/tools/create_railiance_overlay_repo.sh" "$@" ;;
    run) exec railiance-run "$@" ;;
    deploy) exec railiance-stage2 deploy "$@" ;;
    observe) exec railiance-stage2 observe "$@" ;;
    promote) exec railiance-stage3 promote "$@" ;;
    rollback) exec railiance-stage3 rollback "$@" ;;
    *) echo "Unknown compatibility command: ${cmd}" >&2; exit 2 ;;
  esac
}

usage() {
  cat <<'EOF'
Usage: bin/railiance <command> [args]

Commands:
  doctor        Check workstation & provisioning toolchains
  next          Show canonical first-time sequence
  plan-host     Provider-neutral host specs & checklist
  gen-ssh-key   Generate SSH key and show public part
  cloudinit     Emit minimal cloud-init user-data
  init-repo     Idempotently furnish repo housekeeping
  create-overlay Delegate to rail-kubernetes or use local compatibility scaffold
  run           Delegate to rail-kubernetes or run local Stage 1 compatibility path
  deploy        Delegate to rail-kubernetes or run local Stage 2 compatibility path
  observe       Delegate to rail-kubernetes or run local Stage 2 compatibility path
  promote       Delegate to rail-kubernetes or run local Stage 3 compatibility path
  rollback      Delegate to rail-kubernetes or run local Stage 3 compatibility path
  deploy-triage-robustness
                Deploy ACTIVITY-WP-0016 and prove daily-triage validation
  admin-sync-smoke
                Run activity-core no-restart POST /admin/sync smoke
  build-spore   Build a distributable "Spore" bundle
  seed-local    Run the seed script on this machine
  checklist     Pre-VM checklist
  backup        Backup postgres + config to Nextcloud (age-encrypted)
  preflight     Pre-migration safety gate (must pass before cluster work)
  help          Show this help
EOF
}

cmd="${1:-help}"; shift || true

case "$cmd" in
  help) usage ;;
  doctor) exec railiance-doctor "$@" ;;
  plan-host) exec railiance-plan-host "$@" ;;
  gen-ssh-key)
    if ! command -v ssh-keygen >/dev/null 2>&1; then echo "Missing: ssh-keygen" >&2; exit 1; fi
    key="${HOME}/.ssh/id_ed25519"
    [[ -f "$key" ]] || ssh-keygen -t ed25519 -N "" -f "$key"
    echo "Public key:"; cat "${key}.pub"
    ;;
  cloudinit) cat "$ROOT/cloudinit/user-data.yaml" ;;
  init-repo) bash "$ROOT/tools/furnish_railiance_repo.sh" ;;
  create-overlay) run_compat_command create-overlay "$@" ;;
  run) run_compat_command run "$@" ;;
  deploy) run_compat_command deploy "$@" ;;
  observe) run_compat_command observe "$@" ;;
  promote) run_compat_command promote "$@" ;;
  rollback) run_compat_command rollback "$@" ;;
  deploy-triage-robustness) exec railiance-deploy-activity-core-triage-robustness "$@" ;;
  admin-sync-smoke) exec railiance-admin-sync-smoke "$@" ;;
  build-spore) bash "$ROOT/tools/build_spore.sh" ;;
  seed-local) bash "$ROOT/tools/seed_node.sh" ;;
  checklist)
    cat <<'CK'
Rent-a-VM Checklist
-------------------
[ ] Provider account ready (billing set)
[ ] Region chosen (low latency to you/users)
[ ] Image: Ubuntu 24.04 LTS
[ ] Size: 2 vCPU / 4–8 GB RAM / 60+ GB SSD
[ ] SSH key uploaded (see gen-ssh-key)
[ ] Cloud-init pasted (see: bin/railiance cloudinit)
[ ] Hostname set (e.g., railiance-seed-1)
[ ] Record public IP / DNS
CK
    ;;
  next) cat "$ROOT/QUICKSTART.md" ;;
  backup)    exec railiance-backup    "$@" ;;
  preflight) exec railiance-preflight "$@" ;;
  *) echo "Unknown command: $cmd" >&2; usage; exit 2 ;;
esac
