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// 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 std::io;

use crate::*;

/// Parse std io error into opendal::Error.
///
/// # TODO
///
/// Add `NotADirectory` and `IsADirectory` once they are stable.
///
/// ref: <https://github.com/rust-lang/rust/issues/86442>
pub fn new_std_io_error(err: std::io::Error) -> Error {
    use std::io::ErrorKind::*;

    let (kind, retryable) = match err.kind() {
        NotFound => (ErrorKind::NotFound, false),
        PermissionDenied => (ErrorKind::PermissionDenied, false),
        AlreadyExists => (ErrorKind::AlreadyExists, false),
        Unsupported => (ErrorKind::Unsupported, false),

        Interrupted | UnexpectedEof | TimedOut | WouldBlock => (ErrorKind::Unexpected, true),
        _ => (ErrorKind::Unexpected, true),
    };

    let mut err = Error::new(kind, err.kind().to_string()).set_source(err);

    if retryable {
        err = err.set_temporary();
    }

    err
}

/// helper functions to format `Error` into `io::Error`.
///
/// This function is added privately by design and only valid in current
/// context (i.e. `raw` mod). We don't want to expose this function to
/// users.
#[inline]
pub(crate) fn format_std_io_error(err: Error) -> io::Error {
    let kind = match err.kind() {
        ErrorKind::NotFound => io::ErrorKind::NotFound,
        ErrorKind::PermissionDenied => io::ErrorKind::PermissionDenied,
        _ => io::ErrorKind::Interrupted,
    };

    io::Error::new(kind, err)
}