htaccess给予友好的网址

Question

I'm dealing with a noobish problem but i quite dont understand the way that htaccess works.

So i have a link

http://example.com/user/profile.php?username=1

And with this rewrite rule i make it more userfriendly

Options -Indexes
RewriteEngine On

RewriteCond %(REQUEST_FILENAME) !-f
RewriteCond %(REQUEST_FILENAME) !-d
RewriteRule ^user/([a-z0-9]+)$ /profile.php?username=$1 [L]

And it makes the link like this

http://example.com/user/1

All good until know. So my question is that if in the 1st link i DONT give the Name of the username is there anyway that htaccess to make it appear on the link?

If i click the following

<a href="http://example.com/user/profile.php?username=1">see my profile</a>

The htaccess should make the link

http://example.com/user/Konstantinos-Natsios/

So can this happen? and if yes is there any example?

FYI in the profile.php?username=1 with php i take the "1" and i make a query at my DB to get the user's name email etc.