// Copyright Istio Authors

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//     http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

use prometheus_client::metrics::counter::Counter;

use prometheus_client::metrics::gauge::Gauge;

use prometheus_client::registry::Registry;

#[derive(Default)]

pub struct Metrics {

    pub(super) active_proxy_count: Gauge,

    pub(super) pending_proxy_count: Gauge,

    pub(super) proxies_started: Counter,

    pub(super) proxies_stopped: Counter,

}

impl Metrics {

    pub fn new(registry: &mut Registry) -> Self {

        let m = Self::default();

        registry.register(

            "active_proxy_count",

            "The total number current workloads with active proxies (unstable)",

            m.active_proxy_count.clone(),

        );

        registry.register(

            "pending_proxy_count",

            "The total number current workloads with pending proxies (unstable)",

            m.pending_proxy_count.clone(),

        );

        registry.register(

            "proxies_started",

            "The total number of proxies that were started (unstable)",

            m.proxies_started.clone(),

        );

        registry.register(

            "proxies_stopped",

            "The total number of proxies that were stopped (unstable)",

            m.proxies_stopped.clone(),

        );

        m

    }

}