use alloc::vec::Vec;

pub enum DisplayError {
    InvalidFormat,
    InvalidWidth,
    InvalidHeight,
    InvalidBPP,
    InvalidFPS,
}

pub fn parse_display_string(s: &str) -> Result<(u32, u32, u32, u32), DisplayError> {
    let parts: Vec<&str> = s.split('x').collect();
    if parts.len() != 3 {
        return Err(DisplayError::InvalidFormat);
    }

    let width = parts[0]
        .parse::<u32>()
        .map_err(|_| DisplayError::InvalidWidth)?;
    let height = parts[1]
        .parse::<u32>()
        .map_err(|_| DisplayError::InvalidHeight)?;
    let bits: Vec<&str> = parts[2].split('@').collect();
    if bits.len() != 2 {
        return Err(DisplayError::InvalidFormat);
    }

    let bpp = bits[0]
        .parse::<u32>()
        .map_err(|_| DisplayError::InvalidBPP)?;
    let fps = bits[1]
        .parse::<u32>()
        .map_err(|_| DisplayError::InvalidFPS)?;
    Ok((width, height, bpp, fps))
}