Get filetype (directory, executable or text file)

#! /bin/bash

otipo=$(ls -l | grep "$@$" | cut -c 1,4)

if test "otipo" = ""
then
    echo "$@ -> doesn't exist!"
else
    if test "${otipo:0:1}" = "d"
    then
        echo "$@ -> is a directory!"
    else
        if test "${otipo:1:2}" = "x"
        then
            echo "$@ -> is an executable file!"
        else
            echo "$@ -> is a text file!"
        fi
    fi
fi