use console::Style;
use similar::text::{ChangeTag, TextDiff};

fn main() {
    let diff = TextDiff::from_lines(
        "Hello World\nThis is the second line.\nThis is the third.",
        "Hallo Welt\nThis is the second line.\nThis is life.\nMoar and more",
    );

    for op in diff.ops() {
        for change in diff.iter_inline_changes(op) {
            let (sign, style) = match change.tag() {
                ChangeTag::Delete => ("-", Style::new().red()),
                ChangeTag::Insert => ("+", Style::new().green()),
                ChangeTag::Equal => (" ", Style::new()),
            };
            print!("{}", style.apply_to(sign).bold(),);
            for &(emphasized, value) in change.values() {
                if emphasized {
                    print!("{}", style.apply_to(value).underlined());
                } else {
                    print!("{}", style.apply_to(value));
                }
            }
            if change.is_missing_newline() {
                println!();
            }
        }
    }
}