// 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 http::Response;
use http::StatusCode;
use quick_xml::de;
use serde::Deserialize;

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

/// ObsError is the error returned by obs service.
#[derive(Default, Debug, Deserialize)]
#[serde(default, rename_all = "PascalCase")]
struct ObsError {
    code: String,
    message: String,
    resource: String,
    request_id: String,
    host_id: String,
}

/// Parse error response into Error.
pub(super) fn parse_error(resp: Response<Buffer>) -> Error {
    let (parts, body) = resp.into_parts();
    let bs = body.to_bytes();

    let (kind, retryable) = match parts.status {
        StatusCode::NOT_FOUND => (ErrorKind::NotFound, false),
        StatusCode::FORBIDDEN => (ErrorKind::PermissionDenied, false),
        StatusCode::PRECONDITION_FAILED | StatusCode::NOT_MODIFIED => {
            (ErrorKind::ConditionNotMatch, false)
        }
        StatusCode::INTERNAL_SERVER_ERROR
        | StatusCode::BAD_GATEWAY
        | StatusCode::SERVICE_UNAVAILABLE
        | StatusCode::GATEWAY_TIMEOUT => (ErrorKind::Unexpected, true),
        // OBS could return `520 Origin Error` errors which should be retried.
        v if v.as_u16() == 520 => (ErrorKind::Unexpected, true),

        _ => (ErrorKind::Unexpected, false),
    };

    let message = match de::from_reader::<_, ObsError>(bs.clone().reader()) {
        Ok(obs_error) => format!("{obs_error:?}"),
        Err(_) => String::from_utf8_lossy(&bs).into_owned(),
    };

    let mut err = Error::new(kind, message);

    err = with_error_response_context(err, parts);

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

    err
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_parse_error() {
        let bs = bytes::Bytes::from(
            r#"
<?xml version="1.0" encoding="UTF-8"?>
<Error>
<Code>NoSuchKey</Code>
<Message>The resource you requested does not exist</Message>
<Resource>/example-bucket/object</Resource>
<RequestId>001B21A61C6C0000013402C4616D5285</RequestId>
<HostId>RkRCRDJENDc5MzdGQkQ4OUY3MTI4NTQ3NDk2Mjg0M0FBQUFBQUFBYmJiYmJiYmJD</HostId>
</Error>
"#,
        );

        let out: ObsError = de::from_reader(bs.reader()).expect("must success");
        println!("{out:?}");

        assert_eq!(out.code, "NoSuchKey");
        assert_eq!(out.message, "The resource you requested does not exist");
        assert_eq!(out.resource, "/example-bucket/object");
        assert_eq!(out.request_id, "001B21A61C6C0000013402C4616D5285");
        assert_eq!(
            out.host_id,
            "RkRCRDJENDc5MzdGQkQ4OUY3MTI4NTQ3NDk2Mjg0M0FBQUFBQUFBYmJiYmJiYmJD"
        );
    }
}
