#!/usr/bin/env bash

  export HOME="${HOME%%+(\/)}" # Remove trailing slashes if they exist on HOME

  if (( ${nvm_ignore_nvmrc:=0} == 0 ))
  then
    for nvmrc in /etc/nvmrc "$HOME/.nvmrc"
    do
      if [[ -f "$nvmrc" ]]
      then
        if \grep '^\s*nvm .*$' "$nvmrc" >/dev/null 2>&1
        then
          printf "\nError: $nvmrc is for nvm settings only.\nnvm CLI may NOT be called from within $nvmrc. \nSkipping the loading of $nvmrc"
          return 1
        else
          source "$nvmrc"
        fi
      fi
    done
  fi

  if [[ -z "${nvm_path:-}" ]]
  then
    # Set the default sandboxed value.
    # TODO: Alter the variable names to make sense
    if [[ -z "${nvm_user_install_flag:-}" ]]
    then
      if (( UID == 0 )) ||
        [[ -n "${nvm_prefix:-}" && "${nvm_prefix:-}" != "${HOME}" ]]
      then
        nvm_user_install_flag=0
      else
        nvm_user_install_flag=1
      fi
    fi

    if [[ -z "${nvm_prefix:-}" ]]
    then
      if (( ${nvm_user_install_flag:=0} == 0 ))
      then
        nvm_prefix="/usr/local"
      elif [[ -n "$HOME" ]]
      then
        nvm_prefix="$HOME"
      else
        echo "No \$nvm_prefix was provided and "
        echo "$(id | \sed -e's/^[^(]*(//' -e 's/).*//') has no \$HOME defined."
        echo "Halting loading of NVM."
        nvm_load_nvm=0
      fi
    fi

    true "${nvm_prefix/nvm/scripts}" # Fix nvm_prefix changes, older installs.

    if [[ -z "${nvm_path:-}" ]]
    then
      if [[ "$nvm_prefix" = "$HOME" ]]
      then
        nvm_path="${nvm_prefix}/.nvm"
      else
        nvm_path="${nvm_prefix}/nvm"
      fi
    fi
    export nvm_path="${nvm_path%%+(\/)}"
  fi

__nvm_shell_lookup_script()
{
  local relative_scripts_dir
  relative_scripts_dir="$(dirname -- "$(dirname -- "$0")")"
  for directory in "$HOME/.nvm" "/usr/local/nvm" "$relative_scripts_dir"; do
    if [[ -d "$directory" && -s "$directory/nvm.sh" ]]; then
      echo "$directory/nvm.sh"
      return
    fi
  done
}

if [[ -n "$1" && ! -f "$1" && -n "$(echo "$1" | \grep -v '^-')" ]]; then
  nvm_shell_node_string="$1"
  shift
fi

nvm_shell_nvm_path="$(__nvm_shell_lookup_script)"
if [[ -n "$nvm_shell_nvm_path" ]]; then
  source "$nvm_shell_nvm_path"
  # Setup as expected.
  if [[ -n "$nvm_shell_node_string" ]]; then
      nvm use "$nvm_shell_node_string"
      if [[ "$?" -gt 0 ]]; then
        echo "Error: NVM was unable to use '$nvm_shell_node_string'" 1>&2
        exit 1
      fi
  else
    nvm use default >/dev/null 2>&1
  fi
fi

exec bash "$@"