#!/usr/bin/env bash
set -uo pipefail

# debug-path gate (Stop). When a run failed this session and never went through
# _shared/debug-failed-run.md, block the turn end naming the run (or the
# MUGGLE_DEBUG_SKIP escape hatch). muggle-test Step 7C marks that routing
# mandatory and it was still routinely skipped, so failures were summarized and
# dropped — the run a reviewer most needs to see is the one nobody looked at.
#
# Mirrors guardrail-watch-gate.sh: synchronous (only a sync Stop hook can block
# the turn end), fires on EVERY turn end, and pre-filters in shell so Node spawns
# only when a failed run is recorded and unresolved. On the overwhelming majority
# of turns nothing failed, so the state file is absent or failedRuns is empty and
# we return {} in-shell. The evidence join runs in guardrails.mjs. Degrades to {}.
payload="$(cat)"

raw_sid="$(printf '%s' "$payload" | grep -oE '"session_id"[[:space:]]*:[[:space:]]*"[^"]*"' | head -1 | sed -E 's/.*:[[:space:]]*"([^"]*)".*/\1/')"
[ -n "$raw_sid" ] || raw_sid="unknown"
sid="$(printf '%s' "$raw_sid" | sed 's/[^A-Za-z0-9_-]/_/g')"

# Resolve the same home dir Node's os.homedir() uses. HOME is correct on
# macOS/Linux and on most Git Bash setups; fall back to converting USERPROFILE
# when HOME doesn't hold the state dir (some Windows shells point HOME elsewhere).
home="${HOME:-}"
if [ ! -d "$home/.muggle-ai" ] && command -v cygpath >/dev/null 2>&1 && [ -n "${USERPROFILE:-}" ]; then
  home="$(cygpath -u "$USERPROFILE" 2>/dev/null || printf '%s' "$home")"
fi

# Empty array serializes as `"failedRuns": []` (one line); a non-empty array
# spans lines, so the empty match reliably tells them apart.
state_file="$home/.muggle-ai/guardrails/$sid.json"
if [ ! -f "$state_file" ] \
  || ! grep -q '"failedRuns"' "$state_file" \
  || grep -q '"failedRuns": \[\]' "$state_file" \
  || grep -q '"debugReleased": true' "$state_file" \
  || grep -q '"debugSkipped": true' "$state_file"; then
  printf '{}'
  exit 0
fi

root="${CLAUDE_PLUGIN_ROOT:-${CURSOR_PLUGIN_ROOT:-}}"
printf '%s' "$payload" | node "${root}/scripts/guardrails.mjs" debug-path-gate 2>/dev/null || printf '{}'