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

if [ "$#" -lt 1 ] || [ "$#" -gt 2 ]; then
  echo "usage: $0 <tdlib-root> [output-tar.gz]" >&2
  exit 1
fi

tdlib_root="$(realpath "$1")"
output_path="${2:-tdlib-linux-x86_64.tar.gz}"
output_path="$(realpath -m "$output_path")"

include_dir="$tdlib_root/include"
lib_dir="$tdlib_root/lib"

if [ ! -f "$include_dir/td/telegram/td_json_client.h" ]; then
  echo "missing TDLib header: $include_dir/td/telegram/td_json_client.h" >&2
  exit 1
fi

if [ ! -f "$include_dir/td/telegram/tdjson_export.h" ]; then
  echo "missing TDLib export header: $include_dir/td/telegram/tdjson_export.h" >&2
  exit 1
fi

if ! compgen -G "$lib_dir/libtdjson.so*" >/dev/null; then
  echo "missing TDLib shared library under: $lib_dir" >&2
  exit 1
fi

workdir="$(mktemp -d)"
trap 'rm -rf "$workdir"' EXIT

mkdir -p "$workdir/tdlib"
cp -a "$include_dir" "$workdir/tdlib/include"
cp -a "$lib_dir" "$workdir/tdlib/lib"

tar -C "$workdir" -czf "$output_path" tdlib
sha256sum "$output_path" > "${output_path}.sha256"

echo "wrote $output_path"
echo "wrote ${output_path}.sha256"