use chrono::Local;
use env_logger::Builder;
use log::LevelFilter;
use std::io::Write;
use anyhow::Result;
use log::info;

/// # Fn `setup_logger`
/// 
/// ## function to init terminal logger 
/// 
/// ### Dev-Info : 
/// 
/// *input*     :       -
/// 
/// *output*     :       `anyhow::Result<()>`
/// 
/// *initiator*     :    fn `main`
/// 
/// *managing*     :       -
/// 
/// *depends on*    :  -
/// 
pub async fn setup_logger() -> Result<()> {
    Builder::new()
        .format(move |buf, record| {
            writeln!(
                buf,
                "|{}| {} [{}] - {}",
                "api-grubber",
                Local::now().format("%d-%m-%Y %H:%M:%S"),
                record.level(),
                record.args(),
            )
        })
        .filter(None, LevelFilter::Info)
        .target(env_logger::Target::Stdout)
        .init();

    info!("Logger configured");
    Ok(())
}


#[cfg(test)]
mod logger_unittests {
    use tokio::test;
    use super::*;
    #[test]
    async fn check_logger_builder() {
        Builder::new()
        .format(move |buf, record| {
            writeln!(
                buf,
                "|{}| {} [{}] - {}",
                "api-grubber",
                Local::now().format("%d-%m-%Y %H:%M:%S"),
                record.level(),
                record.args(),
            )
        })
        .filter(None, LevelFilter::Info)
        .target(env_logger::Target::Stdout)
        .init();
    }
}