use std::time::Duration;

use actix::Addr;
use chrono::Local;
use emgauwa_lib::constants::RELAYS_RETRY_TIMEOUT;
use emgauwa_lib::errors::EmgauwaError;
use futures::pin_mut;
use tokio::time;
use tokio::time::timeout;
use utils::app_state_get_notifier;

use crate::app_state::AppState;
use crate::utils;

pub async fn run_relays_loop(app_state: Addr<AppState>) {
	log::debug!("Spawned relays loop");
	loop {
		let run_result = run_relays(&app_state).await;
		if let Err(err) = run_result {
			log::error!("Error running relays: {}", err);
		}
		time::sleep(RELAYS_RETRY_TIMEOUT).await;
	}
}

async fn run_relays(app_state: &Addr<AppState>) -> Result<(), EmgauwaError> {
	let default_duration = Duration::new(10, 0);
	let notifier = &*app_state_get_notifier(app_state).await?;

	let mut last_weekday = emgauwa_lib::utils::get_weekday();
	let mut this = utils::app_state_get_this(app_state).await?;

	loop {
		let notifier_future = notifier.notified();
		pin_mut!(notifier_future);
		let timeout_result = timeout(default_duration, &mut notifier_future).await;
		let mut changed = timeout_result.is_ok();

		let current_weekday = emgauwa_lib::utils::get_weekday();
		if current_weekday != last_weekday {
			log::debug!("Weekday changed");
			last_weekday = current_weekday;
			utils::app_state_reload(app_state).await?;
			changed = true;
		}

		if changed {
			log::debug!("Reloading controller in relay loop");
			this = utils::app_state_get_this(app_state).await?;
		}

		let mut relay_debug = String::new();
		let now = Local::now().time();
		for relay in this.relays.iter() {
			relay_debug.push_str(&format!(
				"{}{}: {} ; ",
				if relay.active_schedule.is_on(&now) {
					"+"
				} else {
					"-"
				},
				relay.r.name,
				relay.active_schedule.name
			));
		}
		log::debug!(
			"Relay loop at {}: {}",
			Local::now().naive_local().time(),
			relay_debug
		);
	}
}