#!/usr/bin/env bash
# Scribe plugin — sync stored Processes into auto-surfacing local skills.
#
# Fetches `GET /api/plugin/processes` and writes one
#   ~/.claude/skills/scribe-proc-<slug>/SKILL.md
# per Process. The stub's frontmatter `description` is the auto-surface trigger;
# its body tells Claude to call get_process(<name>) and follow the LIVE procedure
# from Scribe (the DB stays the single source of truth — the stub is a pointer).
#
# WHY LOCAL ~/.claude/skills (not the plugin dir): the plugin is git-cloned and
# identical on every install, so instance-specific stubs can't live inside it.
# Personal skills in ~/.claude/skills are live-detected by Claude Code within the
# session, so a freshly written stub auto-surfaces without a restart.
#
# TRIGGERS: this runs at SessionStart (alongside the context hook) so stubs stay
# fresh each session, and on demand via the `/scribe:sync` command.
#
# FAIL-OPEN & SILENT: never blocks a session; emits NOTHING on stdout (so it's
# safe as a second SessionStart hook). On any fetch failure it exits without
# touching existing stubs — a transient outage must not wipe the user's skills.
# Config mirrors the context hook: CLAUDE_PLUGIN_OPTION_API_ENDPOINT /
# CLAUDE_PLUGIN_OPTION_API_TOKEN (userConfig key UPPERCASED by Claude Code — see
# #2198), with SCRIBE_URL / SCRIBE_TOKEN as the override.
set -uo pipefail

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

url=${SCRIBE_URL:-${CLAUDE_PLUGIN_OPTION_API_ENDPOINT:-}}
token=${SCRIBE_TOKEN:-${CLAUDE_PLUGIN_OPTION_API_TOKEN:-}}
# Guard against an unexpanded `${...}` placeholder arriving as a literal.
case "$url"   in *'${'*) url="" ;; esac
case "$token" in *'${'*) token="" ;; esac
[ -n "$url" ] && [ -n "$token" ] || exit 0

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

count=$(printf '%s' "$body" | jq -r '.processes | length' 2>/dev/null) || exit 0
[ -n "$count" ] && [ "$count" != "null" ] || exit 0

skills_dir="${HOME}/.claude/skills"
mkdir -p "$skills_dir" 2>/dev/null || exit 0

# Slugs written this run — anything else under scribe-proc-* is pruned below.
managed=" "

i=0
while [ "$i" -lt "$count" ]; do
  name=$(printf '%s' "$body" | jq -r ".processes[$i].name // empty" 2>/dev/null)
  slug=$(printf '%s' "$body" | jq -r ".processes[$i].slug // empty" 2>/dev/null)
  desc=$(printf '%s' "$body" | jq -r ".processes[$i].description // empty" 2>/dev/null)
  i=$((i + 1))
  [ -n "$slug" ] && [ -n "$name" ] || continue

  dir="${skills_dir}/scribe-proc-${slug}"
  mkdir -p "$dir" 2>/dev/null || continue
  # description folded to one line — YAML scalar must not contain a newline.
  desc=$(printf '%s' "$desc" | tr '\n' ' ')
  {
    printf -- '---\n'
    printf 'name: scribe-proc-%s\n' "$slug"
    printf 'description: %s\n' "$desc"
    printf -- '---\n\n'
    printf '<!-- GENERATED by the Scribe plugin (scribe_sync_processes.sh). Do not edit here; edit the Process in Scribe and re-sync with /scribe:sync. -->\n\n'
    printf 'This is a saved **Scribe Process**: `%s`.\n\n' "$name"
    printf 'Do not improvise it. Call `get_process("%s")` via the Scribe MCP server to fetch the live procedure, then follow the returned body verbatim — including any "clarify first" steps it contains.\n' "$name"
  } > "${dir}/SKILL.md" 2>/dev/null || continue
  managed="${managed}${slug} "
done

# Prune stubs whose Process no longer exists (scoped to our scribe-proc-* prefix).
for d in "${skills_dir}"/scribe-proc-*; do
  [ -d "$d" ] || continue
  slug=$(basename "$d"); slug=${slug#scribe-proc-}
  case "$managed" in
    *" $slug "*) : ;;
    *) rm -rf "$d" 2>/dev/null ;;
  esac
done

exit 0
