#!/usr/bin/env bash

# return current working directory of tmux pane
getPaneDir() {
  nextone="false"
  ret=""
  for i in $(tmux list-panes -F "#{pane_active} #{pane_current_path}"); do
    [ "$i" == "1" ] && nextone="true" && continue
    [ "$i" == "0" ] && nextone="false"
    [ "$nextone" == "true" ] && ret+="$i "
  done
  echo "${ret%?}"
}

# truncate the path if it's longer than 30 characters
truncatePath() {
  local path="$1"
  local limit=30
  
  if [ ${#path} -gt $limit ]; then
    # Split the path into an array by '/'
    IFS='/' read -r -a path_array <<< "$path"
    truncated_path=""

    for ((i=0; i<${#path_array[@]}-1; i++)); do
      if [ ${#path_array[i]} -gt 1 ]; then
        truncated_path+="${path_array[i]:0:1}/"
      else
        truncated_path+="${path_array[i]}/"
      fi
    done

    # Add the last component of the current directory path
    truncated_path+="${path_array[-1]}"

    echo "$truncated_path"
  else
    echo "$path"
  fi
}

main() {
  path=$(getPaneDir)

  # change '/home/user' to '~'
  cwd="${path/"$HOME"/'~'}"
  
  # Truncate path if it's too long
  truncated_cwd=$(truncatePath "$cwd")

  echo "$truncated_cwd"
}

#run main driver program
main