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

DEFAULT_REF="${FREEVPN_REF:-main}"
BASE_URL="${FREEVPN_BASE_URL:-https://raw.githubusercontent.com/fvp1717/freevpn/${DEFAULT_REF}}"
BASE_URL="${BASE_URL%/}"

need_cmd() {
  if ! command -v "$1" >/dev/null 2>&1; then
    echo "Missing required command: $1" >&2
    exit 1
  fi
}

download_file() {
  local rel_path="$1"
  local dest_path="$2"
  local url="${BASE_URL}/${rel_path}"

  mkdir -p "$(dirname "$dest_path")"

  if command -v curl >/dev/null 2>&1; then
    curl -fsSL "$url" -o "$dest_path"
  elif command -v wget >/dev/null 2>&1; then
    wget -qO "$dest_path" "$url"
  else
    echo "Missing required command: curl or wget" >&2
    exit 1
  fi
}

need_cmd bash
need_cmd ssh
need_cmd scp

tmp_dir="$(mktemp -d 2>/dev/null || mktemp -d -t freevpn)"
cleanup() {
  rm -rf "$tmp_dir"
}
trap cleanup EXIT

echo "Downloading deployment scripts..."
for rel_path in \
  deploy.sh \
  s-ui-install.sh \
  scripts/remote_configure.sh \
  scripts/configure_s_ui.py \
  scripts/verify_remote.sh \
  scripts/preflight_remote.sh
do
  download_file "$rel_path" "$tmp_dir/$rel_path"
done

if [[ ! -f "$tmp_dir/deploy.sh" ]]; then
  echo "Downloaded scripts do not contain deploy.sh" >&2
  exit 1
fi

if [[ -e /dev/tty ]] && { true </dev/tty; } 2>/dev/null; then
  bash "$tmp_dir/deploy.sh" "$@" </dev/tty
else
  bash "$tmp_dir/deploy.sh" "$@"
fi