use serde::Deserialize;

#[derive(Deserialize)]
struct ServiceConfig {
    service: String,
    retries: u8,
    enabled: bool,
}

fn parse_config(input: &str) -> Result<ServiceConfig, serde_json::Error> {
    serde_json::from_str(input)
}

fn print_config(input: &str) {
    match parse_config(input) {
        Ok(config) => {
            println!(
                "loaded service={} retries={} enabled={}",
                config.service, config.retries, config.enabled
            );
        }
        Err(err) => println!("invalid JSON: {err}"),
    }
}

fn main() {
    let valid_json = r#"{"service":"billing","retries":3,"enabled":true}"#;
    let invalid_json = r#"{"service":"billing","retries":3,"enabled":true,}"#;

    print_config(valid_json);
    print_config(invalid_json);
}