use domain::{HAlign, VAlign};

#[allow(private_bounds)]
pub fn align_offset(container: u16, content: u16, align: impl Into<AlignMode>) -> u16 {
    let mode = align.into();
    if content >= container {
        return 0;
    }
    let space = container - content;
    match mode {
        AlignMode::Start => 0,
        AlignMode::Center => space / 2,
        AlignMode::End => space,
    }
}

enum AlignMode {
    Start,
    Center,
    End,
}

impl From<HAlign> for AlignMode {
    fn from(a: HAlign) -> Self {
        match a {
            HAlign::Left => AlignMode::Start,
            HAlign::Center => AlignMode::Center,
            HAlign::Right => AlignMode::End,
        }
    }
}

impl From<VAlign> for AlignMode {
    fn from(a: VAlign) -> Self {
        match a {
            VAlign::Top => AlignMode::Start,
            VAlign::Middle => AlignMode::Center,
            VAlign::Bottom => AlignMode::End,
        }
    }
}