#!/usr/bin/env bash
# gstack-ceo-mode-handoff — print /plan-ceo-review's Step 0E mode handoff line.
#
# Usage: gstack-ceo-mode-handoff <MODE> [--auto] [--decisions "<rows>"]
#   MODE: HOLD SCOPE | SCOPE EXPANSION | SELECTIVE EXPANSION | SCOPE REDUCTION
#         (underscores accepted for spaces)
#   --auto       the mode came from a saved AUTO_DECIDE preference
#   --decisions  governing approved rows; defaults to "none"
#
# The handoff used to be chat-only, and the model often composed it in its
# reasoning without ever sending it. Running this prints the line as a tool
# result, so the selected mode is observable before the review continues.
set -euo pipefail

mode="${1:-}"
[ "$#" -gt 0 ] && shift
auto=0
decisions="none"
while [ "$#" -gt 0 ]; do
  case "$1" in
    --auto) auto=1; shift ;;
    --decisions)
      [ "$#" -ge 2 ] || { echo "gstack-ceo-mode-handoff: --decisions needs a value" >&2; exit 2; }
      decisions="$2"; shift 2 ;;
    *) echo "gstack-ceo-mode-handoff: unknown argument: $1" >&2; exit 2 ;;
  esac
done

mode="${mode//_/ }"
case "$mode" in
  "HOLD SCOPE"|"SCOPE EXPANSION"|"SELECTIVE EXPANSION"|"SCOPE REDUCTION") ;;
  *) echo "gstack-ceo-mode-handoff: unknown mode: ${mode:-<empty>}" >&2; exit 2 ;;
esac
decisions="${decisions//$'\n'/ }"
decisions="${decisions%.}"
[ -n "${decisions// /}" ] || decisions="none"

if [ "$auto" = 1 ]; then
  echo "Auto-decided review mode → $mode (your preference). Change with /plan-tune. Approved decisions: $decisions."
else
  echo "Mode: $mode; approved decisions: $decisions."
fi