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

usage() {
  cat <<'USAGE'
Usage:
  script/verify-macos-document-icon /path/to/Zed.app

Verifies that the given macOS app bundle's Info.plist references a document icon
named "Document" and that the corresponding icon file exists in the bundle.

Specifically checks:
  - CFBundleDocumentTypes[*].CFBundleTypeIconFile includes "Document"
  - Contents/Resources/Document.icns exists

Exit codes:
  0 - success
  1 - verification failed
  2 - invalid usage / missing prerequisites
USAGE
}

fail() {
  echo "error: $*" >&2
  exit 1
}

if [[ $# -ne 1 ]]; then
  usage >&2
  exit 2
fi

app_path="$1"

if [[ ! -d "${app_path}" ]]; then
  fail "app bundle not found: ${app_path}"
fi

info_plist="${app_path}/Contents/Info.plist"
if [[ ! -f "${info_plist}" ]]; then
  fail "missing Info.plist: ${info_plist}"
fi

if ! command -v plutil >/dev/null 2>&1; then
  fail "plutil not found (required on macOS to read Info.plist)"
fi

# Convert to JSON for robust parsing. plutil outputs JSON to stdout in this mode.
info_json="$(plutil -convert json -o - "${info_plist}")"

# Check that CFBundleDocumentTypes exists and that at least one entry references "Document".
# We use Python for JSON parsing; macOS ships with Python 3 on many setups, but not all.
# If python3 isn't available, fall back to a simpler grep-based check.
has_document_icon_ref="false"
if command -v python3 >/dev/null 2>&1; then
  has_document_icon_ref="$(python3 -c "import json,sys; d=json.load(sys.stdin); types=d.get('CFBundleDocumentTypes', []); vals=[t.get('CFBundleTypeIconFile') for t in types if isinstance(t, dict)]; print('true' if 'Document' in vals else 'false')" <<<"${info_json}")"
else
  # This is a best-effort fallback. It may produce false negatives if the JSON formatting differs.
  if echo "${info_json}" | grep -q '"CFBundleTypeIconFile"[[:space:]]*:[[:space:]]*"Document"'; then
    has_document_icon_ref="true"
  fi
fi

if [[ "${has_document_icon_ref}" != "true" ]]; then
  echo "Verification failed for: ${app_path}" >&2
  echo "Expected Info.plist to reference CFBundleTypeIconFile \"Document\" in CFBundleDocumentTypes." >&2
  echo "Tip: This bundle may be missing DocumentTypes.plist extensions or may have different icon naming." >&2
  exit 1
fi

document_icon_path="${app_path}/Contents/Resources/Document.icns"
if [[ ! -f "${document_icon_path}" ]]; then
  echo "Verification failed for: ${app_path}" >&2
  echo "Expected document icon to exist: ${document_icon_path}" >&2
  echo "Tip: The bundle script should copy crates/zed/resources/Document.icns into Contents/Resources/Document.icns." >&2
  exit 1
fi

echo "OK: ${app_path}"
echo " - Info.plist references CFBundleTypeIconFile \"Document\""
echo " - Found ${document_icon_path}"