// Copyright 2023 Greptime Team
//
// 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 std::sync::atomic::{AtomicUsize, Ordering};

use once_cell::sync::OnceCell;
use rand::Rng;

static PORTS: OnceCell<AtomicUsize> = OnceCell::new();

/// Return a unique port(in runtime) for test
pub fn get_port() -> usize {
    PORTS
        .get_or_init(|| AtomicUsize::new(rand::rng().random_range(13000..13800)))
        .fetch_add(1, Ordering::Relaxed)
}
