// Copyright 2020. The Tari Project
//
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use std::time::Duration;

use log::info;
use tokio::time::sleep;

use crate::base_node::state_machine_service::states::{BlockSync, HeaderSyncState, HorizonStateSync, StateEvent};

const LOG_TARGET: &str = "c::bn::state_machine_service::states::waiting";

/// A time-out state for the base node. It will do nothing in this state; and return a Continue event once the
/// timeout is complete.
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct Waiting {
    timeout: Duration,
}

impl Waiting {
    pub async fn next_event(&self) -> StateEvent {
        info!(
            target: LOG_TARGET,
            "The base node has started a WAITING state for {} seconds",
            self.timeout.as_secs()
        );
        sleep(self.timeout).await;
        info!(
            target: LOG_TARGET,
            "The base node waiting state has completed. Resuming normal operations"
        );
        StateEvent::Continue
    }
}

impl Default for Waiting {
    /// A default timeout of 1 minute applies
    fn default() -> Self {
        Self {
            timeout: Duration::from_secs(5),
        }
    }
}

/// Moving from state BlockSyncStrategy -> Waiting.
impl From<BlockSync> for Waiting {
    fn from(_: BlockSync) -> Self {
        Default::default()
    }
}

impl From<HeaderSyncState> for Waiting {
    fn from(_: HeaderSyncState) -> Self {
        Default::default()
    }
}

/// Moving from state HorizonStateSync -> Waiting. A timeout of 1 minute applies
impl From<HorizonStateSync> for Waiting {
    fn from(_: HorizonStateSync) -> Self {
        Default::default()
    }
}
