use crate::qr::QrCode;

pub fn render_svg(qr: &QrCode) -> String {
    let matrix_size = qr.size() as u32;
    let margin = qr.margin as u32;
    let total = matrix_size + 2 * margin;

    let mut svg = String::new();
    svg.push_str(&format!(
        r#"<svg xmlns="http://www.w3.org/2000/svg" width="{}" height="{}" viewBox="0 0 {} {}">"#,
        total, total, total, total
    ));
    svg.push_str(&format!(
        r#"<rect width="{}" height="{}" fill="white"/>"#,
        total, total
    ));

    for y in 0..matrix_size {
        for x in 0..matrix_size {
            if qr.modules()[y as usize][x as usize] {
                svg.push_str(&format!(
                    r#"<rect x="{}" y="{}" width="1" height="1" fill="black"/>"#,
                    x + margin,
                    y + margin
                ));
            }
        }
    }

    svg.push_str("</svg>");
    svg
}