#!/bin/bash
u=0
p=0
e=0
for arg in "$@"
do
    if [ "$arg" == "-u" ] && [ "$u" == 0 ]
    then
        u=1
        continue
    fi
    if [ "$u" == 1 ]
    then
        if [[ "$arg" =~ ^[A-Za-z0-9]{1,}$ ]]
        then
                user=$arg
        else
                echo "Username is not valid!"
                exit 1
        fi
        u=2
    fi

    if [ "$arg" == "-p" ] && [ "$p" == 0 ]
    then
        p=1
        continue
    fi
    if [ "$p" == 1 ]
    then
        if [ ${#arg} -lt 3 ]
        then
                echo "Password is to short!"
                exit 1
        fi
        if [[ "$arg" =~ [A-Z] ]]
        then
            ok=1
        else
            echo "Password $arg is insecure!"
            exit 1
        fi
        if [[ "$arg" =~ ^[A-Za-z0-9._%+-]{1,}$ ]]
        then
                pass=$arg
        fi
        p=2
    fi

    if [ "$arg" == "-e" ] && [ "$e" == 0 ]
    then
        e=1
        continue
    fi
    if [ "$e" == 1 ]
    then
        if [[ "$arg" =~ ^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$ ]]
        then
                email=$arg
        else
                echo "Email is not valid!"
                exit 1
        fi
        e=2
    fi
done

if [ "$p" == 0 ]
then
    echo "User $user has email $email"
else
    echo "User $user has the email $email and password $pass"
fi