Auto picking Runes and Masteries

I think that there should be a system when ever you pick a champion automatically runes and materies are picked for you depending on what type of champion you're playing. For example, I love to play AP but always the recommended will be AD so the system will pick the runes and masteries you have that champion saved with (AP runes and masteries). This way we will evade having ppl with the wrong runes and materies in games. It has happen to me several times and to others on other games. This would be an amazing feature that probably doesn't take that much coding. So pls Riot implement this into the game... Will change the lives of many forgetful ppl or when they just pick the champion and look away from screen or do something else while leaving league behind the browser or another game. Thanks :D

Push this to developers to look at pls!