.htaccess redirection for SEO configuration

I have an angularJs based portfolio, Google crawler offer a URI tool for similar platforms. replaces the #! by ?_escaped_fragment_= which you can use server redirection to changed the directory to serve static files.

I don't use #! so the ?_escaped_fragment_= will be inserted at the end. What I like to do is to make this pattern:

www.mywebsite.com/?_escaped_fragment_=
www.mywebsite.com/page/?_escaped_fragment_=
www.mywebsite.com/page/5?_escaped_fragment_=

Redirects to

www.mywebsite.com/snapshot
www.mywebsite.com/snapshot/page/
www.mywebsite.com/snapshot/page/5

This is the .htaccess file that I used:

RewriteEngine On  
  RewriteCond %{QUERY_STRING} ^_escaped_fragment_=$
  RewriteRule ^$ /snapshot/
  RewriteCond %{DOCUMENT_ROOT}%{REQUEST_URI} -f [OR]
  RewriteCond %{DOCUMENT_ROOT}%{REQUEST_URI} -d
  RewriteRule ^ -  [L]
  RewriteRule ^ /index.html

The problem is that It only works for the base URL (index.html). Is there a thing that I am missing? Thank you.

You have to use the escaped fragment like this:

http://yourangularwebsite.com/?_escaped_fragment_=/page/5

Then redirect it in your .htaccess:

RewriteCond %{QUERY_STRING} _escaped_fragment_=/([^&]*)
RewriteRule ^$ /snapshot/%1 [R,L]

This should redirect you to http://yourangularwebsite.com/snapshot/page/5?_escaped_fragment_=/page/5