#!/usr/bin/env bash
# Scribe plugin — SessionStart push channel.
#
# Curls the operator's Scribe instance for always-on rules + active-project
# context and emits it as SessionStart `additionalContext`. Config comes from
# plugin userConfig, passed in as env by hooks/hooks.json:
#   SCRIBE_URL        base URL, no trailing slash (user_config.api_endpoint)
#   SCRIBE_TOKEN      fmcp_ API key (user_config.api_token)
#   SCRIBE_PROJECT_ID optional numeric project id (user_config.project_id)
#
# FAIL-OPEN: any missing tool/config, network error, or unreachable instance
# injects nothing and exits 0. A session must never be blocked by Scribe.
set -uo pipefail

command -v jq   >/dev/null 2>&1 || exit 0
command -v curl >/dev/null 2>&1 || exit 0

url=${SCRIBE_URL:-}
token=${SCRIBE_TOKEN:-}
project_id=${SCRIBE_PROJECT_ID:-}
[ -n "$url" ] && [ -n "$token" ] || exit 0

q=""
[ -n "$project_id" ] && q="?project_id=${project_id}"

body=$(curl -fsS --max-time 8 \
  -H "Authorization: Bearer ${token}" \
  "${url%/}/api/plugin/context${q}" 2>/dev/null) || exit 0

text=$(printf '%s' "$body" | jq -r '.context // empty' 2>/dev/null) || exit 0
[ -n "$text" ] || exit 0

jq -n --arg c "$text" \
  '{hookSpecificOutput: {hookEventName: "SessionStart", additionalContext: $c}}'
exit 0