// MinIO Rust Library for Amazon S3 Compatible Cloud Storage
// Copyright 2025 MinIO, Inc.
//
// 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 crate::impl_has_s3fields;
use crate::s3::error::{Error, ErrorCode};
use crate::s3::response::a_response_traits::{HasBucket, HasRegion, HasS3Fields};
use crate::s3::types::{FromS3Response, S3Request};
use async_trait::async_trait;
use bytes::Bytes;
use http::HeaderMap;
use std::mem;

/// Represents the response of the [bucket_exists()](crate::s3::client::Client::bucket_exists) API call.
/// This struct contains metadata and information about the existence of a bucket.
#[derive(Clone, Debug)]
pub struct BucketExistsResponse {
    request: S3Request,
    headers: HeaderMap,
    body: Bytes,

    pub(crate) exists: bool,
}
impl_has_s3fields!(BucketExistsResponse);

impl HasBucket for BucketExistsResponse {}
impl HasRegion for BucketExistsResponse {}

#[async_trait]
impl FromS3Response for BucketExistsResponse {
    async fn from_s3response(
        request: S3Request,
        response: Result<reqwest::Response, Error>,
    ) -> Result<Self, Error> {
        match response {
            Ok(mut resp) => Ok(Self {
                request,
                headers: mem::take(resp.headers_mut()),
                body: resp.bytes().await?,
                exists: true,
            }),
            Err(Error::S3Error(e)) if matches!(e.code, ErrorCode::NoSuchBucket) => Ok(Self {
                request,
                headers: e.headers,
                body: Bytes::new(),
                exists: false,
            }),
            Err(e) => Err(e),
        }
    }
}

impl BucketExistsResponse {
    /// Returns `true` if the bucket exists, `false` otherwise.
    pub fn exists(&self) -> bool {
        self.exists
    }
}