use swactor::actor::ActorAddress;

use crate::state::GossipState;

#[derive(Debug, Clone)]
pub enum GossipMessage {
    /// Register a peer to gossip with.
    AddPeer(ActorAddress),
    /// Remove a peer from the gossip set.
    RemovePeer(ActorAddress),
    /// Set a key-value pair in this node's local state.
    Set { key: String, value: Vec<u8> },
    /// Trigger a gossip round: pick a random peer and push our full state.
    DoGossipRound,
    /// Incoming state push from a peer.
    Push {
        from: ActorAddress,
        state: GossipState,
    },
    /// Query the current value for a key; response sent to `reply_to`.
    Query {
        key: String,
        reply_to: ActorAddress,
    },
    /// Ask the actor to dump its current state into the event log (tracing only).
    TakeSnapshot,
}

#[derive(Debug, Clone)]
pub struct GossipQueryResponse {
    pub key: String,
    pub value: Option<Vec<u8>>,
    pub version: Option<u64>,
}