// 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::Buf;

use crate::raw::*;
use crate::*;

/// BlockingWriter is designed to write data into given path in an blocking
/// manner.
pub struct BlockingWriter {
    pub(crate) inner: oio::BlockingWriter,
}

impl BlockingWriter {
    /// Create a new writer.
    ///
    /// Create will use internal information to decide the most suitable
    /// implementation for users.
    ///
    /// We don't want to expose those details to users so keep this function
    /// in crate only.
    pub(crate) fn create(acc: Accessor, path: &str, op: OpWrite) -> Result<Self> {
        let (_, w) = acc.blocking_write(path, op)?;

        Ok(BlockingWriter { inner: w })
    }

    /// Write into inner writer.
    pub fn write(&mut self, bs: impl Into<Buffer>) -> Result<()> {
        let mut bs = bs.into();
        while !bs.is_empty() {
            let n = self.inner.write(bs.clone())?;
            bs.advance(n);
        }
        Ok(())
    }

    /// Close the writer and make sure all data have been stored.
    pub fn close(&mut self) -> Result<()> {
        self.inner.close()
    }

    /// Convert writer into [`StdWriter`] which implements [`std::io::Write`],
    pub fn into_std_write(self) -> StdWriter {
        StdWriter::new(self.inner)
    }
}
