use fast_qr::ECL;

#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
pub enum Mode {
    Ascii,
    Binary,
}

pub fn get_size(len: usize, mode: Mode) -> usize {
    if mode == Mode::Ascii {
        // alphanumeric mode is only 5.5 bits per character, so 5.5 / 8 = 0.6875
        (len as f64 * 0.6875).ceil() as usize
    } else {
        len
    }
}

pub fn get_version(size: usize, ecl: ECL) -> fast_qr::Version {
    use fast_qr::Version::*;
    let ecl = match ecl {
        ECL::L => 0.7,
        ECL::M => 0.15,
        ECL::Q => 0.25,
        ECL::H => 0.30,
    };

    let size = (size as f64 / ecl) as usize;

    match size {
        0..=7 => V01,
        8..=14 => V02,
        15..=24 => V03,
        25..=78 => V04,

        //
        _ => V40,
    }
}