// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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 bytes::Bytes;
use rand::prelude::ThreadRng;
use rand::RngCore;

pub struct RepeatedBytes {
    pub bytes: Bytes,
    pub index: usize,
    pub count: usize,
}

impl Iterator for RepeatedBytes {
    type Item = Bytes;

    fn next(&mut self) -> Option<Self::Item> {
        if self.index < self.count {
            self.index += 1;
            Some(self.bytes.clone())
        } else {
            None
        }
    }
}

pub fn gen_bytes(rng: &mut ThreadRng, size: usize) -> Bytes {
    let mut content = vec![0; size];
    rng.fill_bytes(&mut content);

    content.into()
}