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use crate::message::*;
use crate::threading;
use crate::value::Value;
use crate::Result;
use chrono::Local;
use crossbeam_channel::Sender;
use serde::Deserialize;
use std::thread;
use std::time::Duration;

#[derive(Deserialize, Debug, Clone)]
pub struct Settings {
    /// Interval in milliseconds.
    #[serde(default = "default_interval_ms")]
    pub interval_ms: u64,
}

fn default_interval_ms() -> u64 {
    1000
}

pub fn spawn(service_id: &str, settings: &Settings, tx: &Sender<Message>) -> Result<Vec<Sender<Message>>> {
    let service_id = service_id.to_string();
    let interval = Duration::from_millis(settings.interval_ms);
    let tx = tx.clone();

    threading::spawn(format!("my-iot::clock:{}", service_id), move || {
        let mut counter = 1;
        loop {
            tx.send(Message {
                type_: Type::Actual,
                reading: Reading {
                    sensor: service_id.to_string(),
                    value: Value::Counter(counter),
                    timestamp: Local::now(),
                },
            })
            .unwrap();

            counter += 1;
            thread::sleep(interval);
        }
    })?;

    Ok(vec![])
}