#!/usr/bin/env bash
# gstack-session-kind — classify the current agent session so skills know whether
# a human can answer an interactive prompt (AskUserQuestion).
#
# Usage: gstack-session-kind            → prints one of: spawned | headless | interactive
#
# Used by the preamble (generate-preamble-bash.ts) which echoes
#   SESSION_KIND: <value>
# so the AskUserQuestion-failure fallback rule can branch without a shell-out at
# failure time:
#   spawned     → orchestrator session (OpenClaw). Auto-choose recommended option
#                 per the skill's SPAWNED_SESSION block. Never prose, never BLOCKED.
#   headless    → no human present (claude -p evals / CI). BLOCK on AUQ failure.
#   interactive → a human is present. Prose-fallback on AUQ failure.
#
# Detection is best-effort. On ANY ambiguity it prints `interactive` — BLOCK only on
# a positive headless signal, since a stray prose message in an unmarked one-shot
# `-p` run just ends the turn (harmless), whereas wrongly BLOCKING a real human is not.
#
# Why env vars and not TTY/entrypoint: an interactive Conductor session reports
# CLAUDE_CODE_ENTRYPOINT=sdk-ts with no TTY — identical to a headless SDK eval. The
# signals that actually discriminate are the host/orchestrator/CI env markers below.
set -euo pipefail

# 1. Orchestrator-spawned session (OpenClaw). Authoritative block lives in the skill;
#    we only surface the classification.
if [ -n "${OPENCLAW_SESSION:-}" ]; then
  echo "spawned"
  exit 0
fi

# 2. Explicit headless override (set by the eval/E2E harness for determinism).
if [ -n "${GSTACK_HEADLESS:-}" ]; then
  echo "headless"
  exit 0
fi

# 3. Positive interactive-host signals: a human-driven host is present.
#    - Conductor app sets CONDUCTOR_* workspace vars.
#    - Plain interactive `claude` CLI sets CLAUDE_CODE_ENTRYPOINT=cli.
if [ -n "${CONDUCTOR_WORKSPACE_PATH:-}" ] || [ -n "${CONDUCTOR_PORT:-}" ] || [ "${CLAUDE_CODE_ENTRYPOINT:-}" = "cli" ]; then
  echo "interactive"
  exit 0
fi

# 4. CI / automation markers with no interactive host → headless.
if [ -n "${CI:-}" ] || [ -n "${GITHUB_ACTIONS:-}" ]; then
  echo "headless"
  exit 0
fi

# 5. No positive headless signal → assume a human is present (degrade-safe default).
echo "interactive"