//! Example demonstrating basic Terrace parsing in Rust.

use terrace::{TerraceDocument, StringReader};

#[tokio::main]
async fn main() {
    let content = r#"
config
 database
  host localhost
  port 5432
  name mydb
 server
  port 3000
  host 0.0.0.0
  ssl enabled
"#;

    println!("Parsing Terrace document:");
    println!("{}", content);
    println!("Results:");

    let reader = StringReader::new(content);
    let mut doc = TerraceDocument::with_reader(reader);

    while let Some(node) = doc.next().await {
        if !node.is_empty() {
            println!("{:indent$}{}: '{}'",
                     "",
                     node.head(),
                     node.tail(),
                     indent = node.level() * 2);
        }
    }

    println!("\n--- Filtering Example ---");

    // Example of filtering
    let reader2 = StringReader::new(content);
    let doc2 = TerraceDocument::with_reader(reader2);

    let port_nodes = doc2.filter(|node| node.head() == "port").await;

    println!("Found {} port configurations:", port_nodes.len());
    for node in port_nodes {
        println!("  Port: {} (level {})", node.tail(), node.level());
    }
}