from webob import Request, Response

class WebApp(object):
    def __call__(self, environ, start_response):
        # capture the request coming from the browser
        req = Request(environ)
        print("**** Serving request ****")
        # Looks for the variable (parameter) yes_no in the request
        x = req.params.get('firstname')
        y = req.params.get('surname')
        print(x)
        print(y)

        if x == None or y == None or x == '' or y == '':
            html = """
Hi! My name is Raspberry Pi! What's your name?<br><br>
<form method="post">
Enter first name: <input type="text" name="firstname"><br>
Enter surname: <input type="text" name="surname"><br>
<input type="submit" value="Submit Form">
</form>
"""
        else:
            html = 'Hello ' + x + ' ' + y + ', nice to meet you!'            
        
        # create and return the response to the browser
        resp = Response(html)
        return resp(environ, start_response)

application = WebApp()

# main program - the web server
if __name__ == '__main__':
    from wsgiref.simple_server import make_server
    port = 8080
    httpd = make_server('', port, application)
    print('Serving HTTP on port %s...'%port)
    httpd.serve_forever()