#!/usr/bin/env bash
#
# wp-slimstat pre-commit gate.
# Runs `php -l` (syntax lint) on every staged PHP file.
# Fast, dependency-free, catches syntax errors before they land.
# /simplify is enforced via CLAUDE.md (shell hooks cannot call Claude skills).
#
set -euo pipefail

echo "→ running fast gate before commit (wp-slimstat)"

staged_php="$(git diff --cached --name-only --diff-filter=ACMR -z | tr '\0' '\n' | grep -E '\.php$' || true)"

if [ -z "$staged_php" ]; then
  echo "  no PHP changes, gate skipped"
  exit 0
fi

fail=0
while IFS= read -r file; do
  [ -z "$file" ] && continue
  if ! php -l "$file" > /dev/null 2>&1; then
    echo "  ✗ syntax error in $file"
    php -l "$file" || true
    fail=1
  fi
done <<< "$staged_php"

if [ "$fail" -ne 0 ]; then
  echo "  gate failed — commit rejected"
  exit 1
fi

echo "  ✓ all staged PHP files pass php -l"
exit 0