use std::fs::OpenOptions;

use simplelog::*;

use crate::error;

pub fn init(path: &str) -> error::Result<()> {
    let logfile = match OpenOptions::new().append(true).create(true).open(path) {
        Err(e) => {
            panic!("Could not open log file: {}", e);
        }
        Ok(f) => f,
    };

    if let Err(e) = WriteLogger::init(LevelFilter::Info, Config::default(), logfile) {
        panic!("Could not initiate logging: {}", e);
    }

    Ok(())
}

#[cfg(test)]
mod tests {
    use super::*;

    use std::fs;

    #[test]
    fn init_logs() {
        let file = "clinte_test.log";
        let blank = " ".bytes().collect::<Vec<u8>>();
        fs::write(&file, &blank).unwrap();
        init("clinte_test.log").unwrap();

        log::info!("TEST LOG MESSAGE");
        let logfile = fs::read_to_string(&file).unwrap();
        assert!(logfile.contains("TEST LOG MESSAGE"));

        fs::remove_file("clinte_test.log").unwrap();
    }
}