#!/bin/bash
set -eu
cmd="${SSH_ORIGINAL_COMMAND:-}"
case "$cmd" in
 "pi run")
   logger -t n8n-pi-wrap "ok: pi run (prompt via stdin)"
   prompt=$(cat)
   exec /usr/local/bin/pi --no-tools --mode json -p "$prompt" </dev/null
   ;;
 "pi ingest "*)
   # Strict positional parse: EXACTLY `pi ingest <genome> <raw_path>` (two tokens).
   rest="${cmd#pi ingest }"
   genome="${rest%% *}"
   raw_path="${rest#* }"
   # reject: missing second token, or any extra token (a space left in raw_path)
   if [ "$genome" = "$rest" ] || [ -z "$raw_path" ] || [ "$raw_path" != "${raw_path#* }" ]; then
     echo '{"status":"error","reason":"usage: pi ingest <genome> <raw_path>"}'; exit 1
   fi
   # genome slug: kebab lowercase only
   case "$genome" in ""|*[!a-z0-9-]*) echo '{"status":"error","reason":"invalid genome name"}'; exit 1;; esac
   # raw_path whitelist: MUST live under raw/, no traversal, restricted charset.
   #   - must start with "raw/"      - no ".." segment      - no absolute path / leading slash
   #   - allowed chars: [A-Za-z0-9._/-]   (kebab slugs + subdirs like raw/articles/foo.md)
   case "$raw_path" in
     raw/*) : ;;
     *) echo '{"status":"error","reason":"raw_path must be under raw/"}'; exit 1;;
   esac
   case "$raw_path" in
     *..*|*//*) echo '{"status":"error","reason":"raw_path traversal"}'; exit 1;;
   esac
   case "$raw_path" in
     *[!A-Za-z0-9._/-]*) echo '{"status":"error","reason":"raw_path illegal chars"}'; exit 1;;
   esac

   logger -t n8n-pi-wrap "ok: pi ingest ${genome} ${raw_path}"
   set -a; . "${HOME}/.config/knowledge-genome.env"; set +a
   cd "${GENOMES_ROOT}/${genome}" || { echo '{"status":"error","reason":"unknown genome"}'; exit 1; }

   # The raw file must actually exist under the genome's raw/ dir.
   [ -f "$raw_path" ] || { echo '{"status":"error","reason":"raw file not found"}'; exit 1; }

   # Clean start on the configured base (develop), pinned to the remote. Destroys only
   # vm101's scratch checkout (never a shared branch, never a force-push) — this is by design.
   git fetch -q origin \
     && git switch -q "${INGEST_BASE:-main}" 2>/dev/null \
     && git reset -q --hard "origin/${INGEST_BASE:-main}"

   # SEMANTIC step: dedicated script drives pi to WRITE wiki pages + manifest.
   # (NOT `pi -p "/skill:ingest ..."`, which makes the model reply in chat and write nothing.)
   log="$(mktemp -t pi-ingest.XXXXXX.log)"
   "${HOME}/.pi/agent/skills/ingest/scripts/ingest-semantic.py" "${genome}" "${raw_path}" \
       >"$log" 2>&1 \
     || { echo "{\"status\":\"error\",\"stage\":\"semantic\",\"reason\":\"ingest-semantic failed\",\"log\":\"${log}\"}"; exit 1; }

   # MECHANICAL step: validate manifest -> index/log/scoped-lint/commit/PR -> 1 JSON line
   exec "${HOME}/.pi/agent/skills/ingest/scripts/run-ingest.sh" "${genome}"
   ;;
 "ollama list")
   logger -t n8n-pi-wrap "ok: ollama list"
   exec /usr/local/bin/ollama list
   ;;
 "ollama ps")
   logger -t n8n-pi-wrap "ok: ollama ps"
   exec /usr/local/bin/ollama ps
   ;;
 *)
   logger -t n8n-pi-wrap "denied: ${cmd:-<empty>}"
   echo "unauthorized command" >&2
   exit 1
   ;;
esac