#!/bin/bash
#
#  check_headers.sh — Metrika
#
#  Author:  Simon-Pierre Boucher
#  Contact: contact@spboucher.ai
#  Copyright © 2026 Simon-Pierre Boucher. All rights reserved.
#
#  Rejects any source file (.swift, .metal, .sh, .py, .zyq) missing the
#  mandatory Metrika file header (CLAUDE.md §0). With --staged, checks only
#  files staged in git (pre-commit mode); otherwise checks the whole tree.
#
set -euo pipefail

ROOT="$(cd "$(dirname "$0")/.." && pwd)"
MODE="${1:-all}"

if [[ "$MODE" == "--staged" ]]; then
  FILES=$(git -C "$ROOT" diff --cached --name-only --diff-filter=ACMR \
    | grep -E '\.(swift|metal|sh|py|zyq)$' || true)
else
  FILES=$(cd "$ROOT" && find . \
    -not -path './.git/*' -not -path '*/.build/*' -not -path '*/build/*' \
    -not -path '*/DerivedData/*' -not -path '*/.swiftpm/*' \
    \( -name '*.swift' -o -name '*.metal' -o -name '*.sh' -o -name '*.py' -o -name '*.zyq' \) \
    | sed 's|^\./||')
fi

FAIL=0
for f in $FILES; do
  [[ -f "$ROOT/$f" ]] || continue
  HEAD_BLOCK=$(head -n 12 "$ROOT/$f")
  if ! grep -q 'Author:  Simon-Pierre Boucher' <<<"$HEAD_BLOCK" \
     || ! grep -q 'Contact: contact@spboucher.ai' <<<"$HEAD_BLOCK"; then
    echo "❌ missing Metrika header: $f"
    FAIL=1
  fi
done

if [[ $FAIL -ne 0 ]]; then
  echo ""
  echo "Every source file must begin with the Metrika header (see CLAUDE.md §0)."
  exit 1
fi
echo "✅ header check passed"