use pulldown_cmark::{html, Options, Parser};

pub fn render_markdown(input: &str) -> String {
    let mut options = Options::empty();
    options.insert(Options::ENABLE_TABLES);
    options.insert(Options::ENABLE_TASKLISTS);
    options.insert(Options::ENABLE_STRIKETHROUGH);
    options.insert(Options::ENABLE_FOOTNOTES);

    let parser = Parser::new_ext(input, options);
    let mut html_output = String::new();
    html::push_html(&mut html_output, parser);
    html_output
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn renders_headings_and_paragraphs() {
        let md = "# Hello\n\nThis is a paragraph.";
        let html = render_markdown(md);
        assert!(html.contains("<h1>Hello</h1>"));
        assert!(html.contains("<p>This is a paragraph.</p>"));
    }

    #[test]
    fn renders_tasklists() {
        let md = "- [x] Done\n- [ ] Todo";
        let html = render_markdown(md);
        assert!(html.contains("<input"));
        assert!(html.contains("checked"));
    }

    #[test]
    fn renders_tables() {
        let md = "| A | B |\n|---|---|\n| 1 | 2 |";
        let html = render_markdown(md);
        assert!(html.contains("<table>"));
        assert!(html.contains("<th>A</th>"));
    }
}