#!/bin/sh
# Claude Code Stop hook — fires on every turn boundary, not just completion.
# Convention: the agent signals "this task is done" by writing a report file
# named .orchestra-report.md at the worktree root before stopping. If that
# marker is present, report completion. If it is absent, this is an ordinary
# turn boundary — ask the unified turn-decision endpoint (AUDIT.md B3, Phase
# 2 items 1-2) what to do instead of no-op'ing.
#
# Requires: ORCHESTRA_TASK_ID and ORCHESTRA_URL set in the pane's env.
# Optional: ORCHESTRA_HARNESS_TOKEN if the server requires one.
#
# Reads the Stop hook's JSON payload from stdin (has "transcript_path" and
# "cwd"); needs jq.

set -eu

payload="$(cat)"
transcript_path="$(printf '%s' "$payload" | jq -r '.transcript_path // empty')"
cwd="$(printf '%s' "$payload" | jq -r '.cwd // empty')"

[ -z "$transcript_path" ] && exit 0
[ -z "${ORCHESTRA_TASK_ID:-}" ] && exit 0
[ -z "${ORCHESTRA_URL:-}" ] && exit 0

auth_header=""
if [ -n "${ORCHESTRA_HARNESS_TOKEN:-}" ]; then
	auth_header="Authorization: Bearer ${ORCHESTRA_HARNESS_TOKEN}"
fi

report_file="${cwd:-.}/.orchestra-report.md"

if [ -f "$report_file" ]; then
	report="$(cat "$report_file")"

	body="$(jq -n \
		--arg task_id "$ORCHESTRA_TASK_ID" \
		--arg transcript_path "$transcript_path" \
		--arg report "$report" \
		'{task_id: $task_id, harness: "claude", transcript_path: $transcript_path, report: $report}')"

	if curl -fsS -X POST "${ORCHESTRA_URL%/}/v1/harness/complete" \
		-H "Content-Type: application/json" \
		${auth_header:+-H "$auth_header"} \
		-d "$body" >/dev/null 2>&1; then
		rm -f "$report_file"
	else
		echo "orchestra-stop: failed to report completion" >&2
		exit 2
	fi
	exit 0
fi

body="$(jq -n --arg task_id "$ORCHESTRA_TASK_ID" '{task_id: $task_id}')"

response="$(curl -fsS -X POST "${ORCHESTRA_URL%/}/v1/harness/turn" \
	-H "Content-Type: application/json" \
	${auth_header:+-H "$auth_header"} \
	-d "$body" 2>/dev/null)" || {
	echo "orchestra-stop: failed to reach turn-decision endpoint" >&2
	exit 0
}

decision="$(printf '%s' "$response" | jq -r '.decision // empty')"

if [ "$decision" = "refuse" ]; then
	echo "orchestra-stop: turn decision is refuse — this turn boundary is not safe to stop at" >&2
	exit 2
fi

exit 0