use std::sync::Arc;

use metrics::{register_meter, register_meter_with_group, Histogram, Meter, Sample};

pub struct PubsubMsgHandleMetrics {
    pub(crate) topic_name: &'static str,
    pub(crate) qps: Arc<dyn Meter>,
    pub(crate) latency_ms: Arc<dyn Histogram>,
    pub(crate) timeout: Arc<dyn Meter>,
}

impl PubsubMsgHandleMetrics {
    pub fn new(topic_name: &'static str) -> Self {
        let group_name = format!("router_libp2p_handle_pubsub_{}", topic_name);

        Self {
            topic_name,
            qps: register_meter_with_group(group_name.as_str(), "qps"),
            latency_ms: Sample::ExpDecay(0.015).register_with_group(
                group_name.as_str(),
                "latency_ms",
                1024,
            ),
            timeout: register_meter_with_group(group_name.as_str(), "timeout"),
        }
    }
}

lazy_static::lazy_static! {
    // service
    pub static ref SERVICE_ROUTE_NETWORK_MESSAGE: Arc<dyn Meter> = register_meter("router_service_route_network_message");
    pub static ref SERVICE_ROUTE_NETWORK_MESSAGE_SEND_REQUEST: Arc<dyn Meter> = register_meter("router_service_route_network_message_send_request");
    pub static ref SERVICE_ROUTE_NETWORK_MESSAGE_SEND_RESPONSE: Arc<dyn Meter> = register_meter("router_service_route_network_message_send_response");
    pub static ref SERVICE_ROUTE_NETWORK_MESSAGE_SEND_ERROR_RESPONSE: Arc<dyn Meter> = register_meter("router_service_route_network_message_send_error_response");
    pub static ref SERVICE_ROUTE_NETWORK_MESSAGE_PUBLISH: Arc<dyn Meter> = register_meter("router_service_route_network_message_publish");
    pub static ref SERVICE_ROUTE_NETWORK_MESSAGE_REPORT_PEER: Arc<dyn Meter> = register_meter("router_service_route_network_message_report_peer");
    pub static ref SERVICE_ROUTE_NETWORK_MESSAGE_GOODBYE_PEER: Arc<dyn Meter> = register_meter("router_service_route_network_message_goodbye_peer");
    pub static ref SERVICE_ROUTE_NETWORK_MESSAGE_DIAL_PEER: Arc<dyn Meter> = register_meter_with_group("router_service_route_network_message_dial_peer", "all");
    pub static ref SERVICE_ROUTE_NETWORK_MESSAGE_DIAL_PEER_ALREADY: Arc<dyn Meter> = register_meter_with_group("router_service_route_network_message_dial_peer", "already");
    pub static ref SERVICE_ROUTE_NETWORK_MESSAGE_DIAL_PEER_NEW_OK: Arc<dyn Meter> = register_meter_with_group("router_service_route_network_message_dial_peer", "ok");
    pub static ref SERVICE_ROUTE_NETWORK_MESSAGE_DIAL_PEER_NEW_FAIL: Arc<dyn Meter> = register_meter_with_group("router_service_route_network_message_dial_peer", "fail");
    pub static ref SERVICE_ROUTE_NETWORK_MESSAGE_ANNOUNCE_LOCAL_FILE: Arc<dyn Meter> = register_meter("router_service_route_network_message_announce_local_file");
    pub static ref SERVICE_ROUTE_NETWORK_MESSAGE_UPNP: Arc<dyn Meter> = register_meter("router_service_route_network_message_upnp");

    pub static ref SERVICE_EXPIRED_PEERS: Arc<dyn Histogram> = Sample::ExpDecay(0.015).register("router_service_expired_peers", 1024);

    // libp2p_event_handler

    // libp2p_event_handler: peer connection
    pub static ref LIBP2P_HANDLE_PEER_CONNECTED_OUTGOING: Arc<dyn Meter> = register_meter_with_group("router_libp2p_handle_peer_connected", "outgoing");
    pub static ref LIBP2P_HANDLE_PEER_CONNECTED_INCOMING: Arc<dyn Meter> = register_meter_with_group("router_libp2p_handle_peer_connected", "incoming");
    pub static ref LIBP2P_HANDLE_PEER_DISCONNECTED: Arc<dyn Meter> = register_meter("router_libp2p_handle_peer_disconnected");

    // libp2p_event_handler: status
    pub static ref LIBP2P_SEND_STATUS: Arc<dyn Meter> = register_meter("router_libp2p_send_status");
    pub static ref LIBP2P_HANDLE_STATUS_REQUEST: Arc<dyn Meter> = register_meter("router_libp2p_handle_status_request");
    pub static ref LIBP2P_HANDLE_STATUS_RESPONSE: Arc<dyn Meter> = register_meter_with_group("router_libp2p_handle_status_response", "qps");
    pub static ref LIBP2P_HANDLE_STATUS_RESPONSE_LATENCY: Arc<dyn Histogram> = Sample::ExpDecay(0.015).register_with_group("router_libp2p_handle_status_response", "latency", 1024);

    // libp2p_event_handler: get chunks
    pub static ref LIBP2P_HANDLE_GET_CHUNKS_REQUEST: Arc<dyn Meter> = register_meter("router_libp2p_handle_get_chunks_request");
    pub static ref LIBP2P_HANDLE_GET_CHUNKS_RESPONSE: Arc<dyn Meter> = register_meter_with_group("router_libp2p_handle_get_chunks_response", "qps");
    pub static ref LIBP2P_HANDLE_GET_CHUNKS_RESPONSE_LATENCY: Arc<dyn Histogram> = Sample::ExpDecay(0.015).register_with_group("router_libp2p_handle_get_chunks_response", "latency", 1024);

    // libp2p_event_handler: rpc errors
    pub static ref LIBP2P_HANDLE_RESPONSE_ERROR: Arc<dyn Meter> = register_meter_with_group("router_libp2p_handle_response_error", "qps");
    pub static ref LIBP2P_HANDLE_RESPONSE_ERROR_LATENCY: Arc<dyn Histogram> = Sample::ExpDecay(0.015).register_with_group("router_libp2p_handle_response_error", "latency", 1024);

    // libp2p_event_handler: pubsub messages
    pub static ref LIBP2P_HANDLE_PUBSUB_NEW_FILE: PubsubMsgHandleMetrics = PubsubMsgHandleMetrics::new("new_file");
    pub static ref LIBP2P_HANDLE_PUBSUB_ASK_FILE: PubsubMsgHandleMetrics = PubsubMsgHandleMetrics::new("ask_file");
    pub static ref LIBP2P_HANDLE_PUBSUB_FIND_CHUNKS: PubsubMsgHandleMetrics = PubsubMsgHandleMetrics::new("find_chunks");
    pub static ref LIBP2P_HANDLE_PUBSUB_ANNOUNCE_CHUNKS: PubsubMsgHandleMetrics = PubsubMsgHandleMetrics::new("announce_chunks");
    pub static ref LIBP2P_HANDLE_PUBSUB_ANNOUNCE_SHARD: PubsubMsgHandleMetrics = PubsubMsgHandleMetrics::new("announce_shard");

    // libp2p_event_handler: find & announce file
    pub static ref LIBP2P_HANDLE_PUBSUB_FIND_FILE: PubsubMsgHandleMetrics = PubsubMsgHandleMetrics::new("find_file");
    pub static ref LIBP2P_HANDLE_PUBSUB_FIND_FILE_STORE: Arc<dyn Meter> = register_meter_with_group("router_libp2p_handle_pubsub_find_file", "store");
    pub static ref LIBP2P_HANDLE_PUBSUB_FIND_FILE_CACHE: Arc<dyn Meter> = register_meter_with_group("router_libp2p_handle_pubsub_find_file", "cache");
    pub static ref LIBP2P_HANDLE_PUBSUB_FIND_FILE_FORWARD: Arc<dyn Meter> = register_meter_with_group("router_libp2p_handle_pubsub_find_file", "forward");

    pub static ref LIBP2P_HANDLE_PUBSUB_ANNOUNCE_FILE: Arc<dyn Meter> = register_meter_with_group("router_libp2p_handle_pubsub_announce_file", "qps");
    pub static ref LIBP2P_HANDLE_PUBSUB_ANNOUNCE_FILE_LATENCY: Arc<dyn Histogram> = Sample::ExpDecay(0.015).register_with_group("router_libp2p_handle_pubsub_announce_file", "latency", 1024);
    pub static ref LIBP2P_HANDLE_PUBSUB_ANNOUNCE_FILE_TIMEOUT: Arc<dyn Meter> = register_meter_with_group("router_libp2p_handle_pubsub_announce_file", "timeout");
    pub static ref LIBP2P_HANDLE_PUBSUB_ANNOUNCE_FILE_ANNOUNCEMENTS: Arc<dyn Meter> = register_meter_with_group("router_libp2p_handle_pubsub_announce_file", "announcements");
    pub static ref LIBP2P_HANDLE_PUBSUB_ANNOUNCE_FILE_FILES: Arc<dyn Meter> = register_meter_with_group("router_libp2p_handle_pubsub_announce_file", "files");

    // libp2p_event_handler: verify IP address
    pub static ref LIBP2P_VERIFY_ANNOUNCED_IP: Arc<dyn Meter> = register_meter("router_libp2p_verify_announced_ip");
    pub static ref LIBP2P_VERIFY_ANNOUNCED_IP_UNSEEN: Arc<dyn Meter> = register_meter("router_libp2p_verify_announced_ip_unseen");
    pub static ref LIBP2P_VERIFY_ANNOUNCED_IP_MISMATCH: Arc<dyn Meter> = register_meter("router_libp2p_verify_announced_ip_mismatch");

    // batcher
    pub static ref BATCHER_ANNOUNCE_FILE_SIZE: Arc<dyn Histogram> = Sample::ExpDecay(0.015).register("router_batcher_announce_file_size", 1024);
}