use std::alloc::{alloc, Layout};

use const_lru::ConstLru;
use num_traits::{PrimInt, Unsigned};

use super::traits::Insert;

#[derive(Clone, Copy, Debug, Default, Eq, PartialEq, Hash, PartialOrd, Ord)]
pub struct BigStruct {
    pub a1: [usize; 32],
    pub a2: [usize; 32],
    pub a3: [usize; 32],
    pub a4: [usize; 32],
}

impl From<u8> for BigStruct {
    fn from(value: u8) -> Self {
        let mut s: Self = Default::default();
        s.a3[0] = value.into();
        s
    }
}

impl From<u16> for BigStruct {
    fn from(value: u16) -> Self {
        let mut s: Self = Default::default();
        s.a3[0] = value.into();
        s
    }
}

pub fn fill_up_all_u8_keys<C: Insert<K, V>, K: From<u8>, V: From<u8>>(container: &mut C) {
    for k in 0..u8::MAX {
        container.insert_no_ret(k.into(), k.into());
    }
}

pub fn fill_up_all_10k_keys<C: Insert<K, V>, K: From<u16>, V: From<u16>>(container: &mut C) {
    for k in 0..10_000 {
        container.insert_no_ret(k.into(), k.into());
    }
}

pub fn boxed_const_lru<K, V, const CAP: usize, I: PrimInt + Unsigned>(
) -> Box<ConstLru<K, V, CAP, I>> {
    let layout = Layout::new::<ConstLru<K, V, CAP, I>>();
    unsafe {
        let ptr = alloc(layout) as *mut ConstLru<K, V, CAP, I>;
        ConstLru::init_at_alloc(ptr);
        Box::from_raw(ptr)
    }
}