#!/usr/bin/env bash
set -Eeuo pipefail
IFS=$'\n\t'

log() { printf '%s\n' "$*"; }
log_err() { printf 'ERR: %s\n' "$*" >&2; }

usage() {
  cat <<'USG'
Usage: omnicron.sh <subcommand> [args]
Subcommands:
  log <event> [k=v ...]         Structured event log
  notify <level> <message>      Ops notification
  artifact-put <path> <name>    Upload artifact (no-op shim)
  artifact-get <name> <dest>    Download artifact (no-op shim)

Notes:
  - Degrades to no-op if real 'omnicron' CLI not found.
  - Reads env: OMNICRON_URL, OMNICRON_TOKEN, OMNICRON_ENV
USG
}

cleanup() { :; }
trap cleanup EXIT

has_real_cli() { command -v omnicron >/dev/null 2>&1; }

sub=${1:-}
shift || true

if [[ -z "${sub}" ]]; then
  usage; exit 1
fi

if has_real_cli; then
  # Delegate to real CLI if available
  omnicron "${sub}" "$@" || {
    log_err "real omnicron CLI failed; falling back to shim"
  }
fi

case "${sub}" in
  log)
    evt=${1:-}
    shift || true
    [[ -z "${evt}" ]] && { log_err "event required"; exit 2; }
    printf '{"type":"event","event":"%s","env":"%s","args_raw":"%s"}\n' \
      "$evt" "${OMNICRON_ENV:-dev}" "$*"
    ;;
  notify)
    level=${1:-}; message=${2:-}
    [[ -z "${level}" || -z "${message}" ]] && { log_err "level and message required"; exit 2; }
    printf '{"type":"notify","level":"%s","message":"%s","env":"%s"}\n' \
      "$level" "$message" "${OMNICRON_ENV:-dev}"
    ;;
  artifact-put)
    path=${1:-}; name=${2:-}
    [[ -z "${path}" || -z "${name}" ]] && { log_err "path and name required"; exit 2; }
    printf '{"type":"artifact_put","path":"%s","name":"%s","provider":"shim"}\n' \
      "$path" "$name"
    ;;
  artifact-get)
    name=${1:-}; dest=${2:-}
    [[ -z "${name}" || -z "${dest}" ]] && { log_err "name and dest required"; exit 2; }
    printf '{"type":"artifact_get","name":"%s","dest":"%s","provider":"shim"}\n' \
      "$name" "$dest"
    ;;
  --help|-h|help)
    usage; ;;
  *)
    log_err "unknown subcommand: ${sub}"; usage; exit 2;
    ;;
 esac