use anyhow::Result;
use fern::colors::{Color, ColoredLevelConfig};

pub fn setup_logger() -> Result<()> {
    let colors = ColoredLevelConfig::new()
        .info(Color::Green)
        .error(Color::Red)
        .warn(Color::Yellow)
        .debug(Color::Blue);

    fern::Dispatch::new()
        // Perform allocation-free log formatting
        .format(move |out, message, record| {
            out.finish(format_args!(
                "[{} {} {}] {}",
                humantime::format_rfc3339_millis(std::time::SystemTime::now()),
                colors.color(record.level()),
                record.target(),
                message
            ))
        })
        // Add blanket level filter -
        .level(log::LevelFilter::Debug)
        // - and per-module overrides
        .chain(std::io::stdout())
        .chain(fern::log_file("output.log")?)
        // Apply globally
        .apply()?;

    Ok(())
}