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#![feature(random)]
use std::random::random;
#[derive(Debug, Clone)]
pub enum Suit {
Spades,
Hearts,
Clubs,
Diamonds,
}
#[derive(Debug, Clone)]
pub enum Value {
Ace,
Two,
Three,
Four,
Five,
Six,
Seven,
Eight,
Nine,
Ten,
Jack,
Queen,
King,
}
#[derive(Debug, Clone)]
pub struct Card {
pub suit: Suit,
pub value: Value,
}
impl Card {
pub fn new(suit: Suit, value: Value) -> Self {
Card {
suit: suit,
value: value,
}
}
}
#[derive(Debug)]
pub struct Stack(Vec<Card>);
impl Stack {
pub fn new(cards: Vec<Card>) -> Self {
Stack(cards)
}
pub fn shuffle(&mut self) {
let n: usize = self.0.len();
if n == 0 {
return;
}
for i in 0..(n - 1) {
let j = random::<usize>(..) % (n - i) + i;
self.0.swap(i, j);
}
}
pub fn shuffle_in(&mut self, stack: &mut Stack) {
stack.take_cards(&mut self.0);
self.shuffle();
}
pub fn draw(&mut self) -> Option<Card> {
self.0.iter().next().cloned();
}
fn take_cards(&mut self, cards: &mut Vec<Card>) {
cards.append(&mut self.0.clone());
self.0.clear();
}
}
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