use rust_gpiozero::*;
use std::{
    fs::File,
    thread,
    time,
}

const PIN: u8 = 17;
const FILE_TEMP: &str = "/sys/class/thermal/thermal_zone0/temp";
const SLEEP_T: usize = 5; // 5 seconds

fn main() {

    let fan_pin = output_devices::OutputDevice::new(PIN);

    loop {
        let mut file = File::open(FILE_TEMP)?;
        let mut contens =  String::new();

        file.read_to_string(&mut contents)?;

        let temperature: u8 = contents.parse()?;

        if (temperature < MIN_TEMP && fan_pin.value() || temperature > MAX_TEMP && !fan_pin.value()) {
            fan_pin.toggle();
        }

        thread::sleep(time::Duration::from_secs(SLEEP_T))
    }
    led.blink(2.0,3.0);

}