#!/usr/bin/env bash
set -euo pipefail
SEL_DIR="${1:-}"
[[ -n "$SEL_DIR" ]] || { echo "Usage: backtunnel-access-tui <selected-dir>"; exit 1; }

# Defaults: mount INTO the selected folder
DEFAULT_MP="$SEL_DIR"

# If selected folder is not empty, propose subdir
if [[ -d "$SEL_DIR" ]] && [[ -n "$(ls -A -- "$SEL_DIR" 2>/dev/null || true)" ]]; then
  DEFAULT_MP="$SEL_DIR/backtunnel"
fi

read -r -p "Remote (user@host or user:host) [user@vps.example.com]: " REMOTE
REMOTE="${REMOTE:-user@vps.example.com}"

read -r -p "Tunnel port on remote [2222]: " PORT
PORT="${PORT:-2222}"

read -r -p "Mount point [${DEFAULT_MP}]: " MP
MP="${MP:-$DEFAULT_MP}"

# Expand leading ~ if user typed it
if [[ "$MP" == "~"* ]]; then
  MP="${MP/#\~/$HOME}"
fi

# Ensure mountpoint exists & is writable
mkdir -p -- "$MP"
if [[ ! -w "$MP" ]]; then
  echo "Mount point '$MP' is not writable"; exit 1
fi

echo
echo "Running: backtunnel-access '<remote-folder>' from '$REMOTE' -p '$PORT' -m '$MP'"
echo "Note: you'll be prompted on the remote for the exact folder (as per your workflow)."
exec backtunnel-access "$MP" from "$REMOTE" -p "$PORT" -m "$MP"