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

usage() {
  cat <<'EOF'
Usage:
  ./build_tools/macos/export_compliance/make_pdf.sh \
    --bundle-id com.dryark.strawberry \
    --version 1.2.3 \
    --developer "Dry Ark LLC" \
    --contact "support@example.com"

Outputs (in the same folder as this script):
  - EXPORT_COMPLIANCE.filled.txt
  - EXPORT_COMPLIANCE.pdf

Notes:
  - Uses macOS built-in /usr/sbin/cupsfilter to generate the PDF from plain text.
EOF
}

script_dir="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
template="${script_dir}/EXPORT_COMPLIANCE.txt"
filled="${script_dir}/EXPORT_COMPLIANCE.filled.txt"
pdf="${script_dir}/EXPORT_COMPLIANCE.pdf"
tmp_html="${script_dir}/EXPORT_COMPLIANCE.tmp.html"

bundle_id=""
version=""
developer=""
contact=""
date_str="$(date +%Y-%m-%d)"

while [[ $# -gt 0 ]]; do
  case "$1" in
    --bundle-id) bundle_id="${2:-}"; shift 2 ;;
    --version) version="${2:-}"; shift 2 ;;
    --developer) developer="${2:-}"; shift 2 ;;
    --contact) contact="${2:-}"; shift 2 ;;
    -h|--help) usage; exit 0 ;;
    *) echo "Unknown arg: $1" >&2; usage; exit 2 ;;
  esac
done

if [[ -z "$bundle_id" || -z "$version" || -z "$developer" || -z "$contact" ]]; then
  echo "Error: missing required args." >&2
  usage
  exit 2
fi

if [[ "$(uname -s)" != "Darwin" ]]; then
  echo "Error: This script is for macOS only (uses textutil)." >&2
  exit 1
fi

if [[ ! -f "$template" ]]; then
  echo "Error: missing template file: $template" >&2
  exit 1
fi

if [[ ! -x /usr/sbin/cupsfilter ]]; then
  echo "Error: /usr/sbin/cupsfilter not found. This should exist on macOS." >&2
  exit 1
fi

escape_sed_repl() {
  # Escape characters that are special in sed replacement strings: \ & and delimiter |
  # bash 3.2 compatible
  echo "$1" | sed -e 's/[\\&|]/\\&/g'
}

bundle_id_esc="$(escape_sed_repl "$bundle_id")"
version_esc="$(escape_sed_repl "$version")"
developer_esc="$(escape_sed_repl "$developer")"
contact_esc="$(escape_sed_repl "$contact")"
date_esc="$(escape_sed_repl "$date_str")"

sed \
  -e "s|@BUNDLE_ID@|${bundle_id_esc}|g" \
  -e "s|@VERSION@|${version_esc}|g" \
  -e "s|@DEVELOPER@|${developer_esc}|g" \
  -e "s|@CONTACT@|${contact_esc}|g" \
  -e "s|@DATE@|${date_esc}|g" \
  "$template" > "$filled"

rm -f "$pdf" >/dev/null 2>&1 || true
rm -f "$tmp_html" >/dev/null 2>&1 || true

# Convert plain text to PDF. cupsfilter writes PDF to stdout.
# Suppress noisy DEBUG output from cupsfilter on stderr.
/usr/sbin/cupsfilter -i text/plain -m application/pdf "$filled" > "$pdf" 2>/dev/null

echo "Wrote:"
echo "  $filled"
echo "  $pdf"