use core::borrow::{Borrow, BorrowMut};

use hd44780_driver::display_size::DisplaySize;
use miniconf::{Error, Packed, Tree, TreeKey};
use serde::{Deserialize, Serialize};
use heapless::String;

#[derive(Tree, Default)]
pub struct Msg(pub String<80>);

impl Borrow<str> for Msg {
    fn borrow(&self) -> &str {
        &self.0
    }
}

impl BorrowMut<str> for Msg {
    fn borrow_mut(&mut self) -> &mut str {
        &mut self.0
    }
}

#[derive(Tree, Default)]
pub struct Settings {
    lcd_size: [u8; 2],
    #[tree(depth=3)]
    msgs: [Option<Msg>; 12]
}


const fn const_packed(u: usize) -> Packed {
    match Packed::new(u) {
        Some(p) => p,
        None => panic!("non-zero key required")
    }
}

pub const SIZE: Packed = const_packed(0b1_0);
pub const MSG_0: Packed = const_packed(0b1_0000_1);
pub const MSG_1: Packed = const_packed(0b1_1000_1);