use arbitrary::{Arbitrary, Unstructured};
use canvas::{Card, CardField};

#[derive(Debug, Clone)]
pub struct RandomCard(pub(crate) Card);
#[derive(Debug)]
struct RandomCardField(CardField);

impl<'a> Arbitrary<'a> for RandomCardField {
    fn arbitrary(u: &mut Unstructured<'a>) -> arbitrary::Result<Self> {
        let i = u.int_in_range(0..=15)?;
        if let Ok(w) = CardField::try_from_bits(i) {
            Ok(RandomCardField(w))
        } else {
            Ok(RandomCardField(CardField::Empty))
        }
    }
}

impl<'a> Arbitrary<'a> for RandomCard {
    fn arbitrary(u: &mut Unstructured<'a>) -> arbitrary::Result<Self> {
        let mut r = vec![];
        for _ in 0..5 {
            r.push(u.arbitrary::<RandomCardField>()?)
        }
        let w: [RandomCardField; 5] = r.try_into().unwrap();
        let r = Card::from(w.map(|x: RandomCardField| x.0));
        Ok(RandomCard(r))
    }
}