use color_eyre::{eyre::Context, Result};
use comrak::{format_html, nodes::AstNode, parse_document, Arena, ComrakOptions};

pub fn render(inp: &str) -> Result<String> {
    let mut options = ComrakOptions::default();
    options.extension.table = true;
    options.extension.description_lists = true;
    options.extension.strikethrough = true;
    options.extension.footnotes = true;

    let arena = Arena::new();
    let root = parse_document(&arena, inp, &options);

    let mut html = vec![];
    format_html(root, &options, &mut html).unwrap();

    String::from_utf8(html).wrap_err("this is somehow not UTF-8")
}

/**
 * Takes in a root node and a function to act on it, then recursively acts on
 * all children of that node
 */
fn iter_nodes<'a, F>(node: &'a AstNode<'a>, f: &F) -> Result<()>
where
    F: Fn(&'a AstNode<'a>) -> Result<()>,
{
    f(node)?;
    for c in node.children() {
        iter_nodes(c, f)?;
    }
    Ok(())
}