// 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.

#pragma once

#include <string>

#include "common/status.h"

#include "service/http/http_handler_with_auth.h"

namespace doris {

class HttpRequest;

class ExecEnv;

class CloudStorageEngine;

// HTTP action for viewing and force-setting peer cache candidates.

//

// GET  /api/peer_cache?op=show&tablet_id=12345

//   Show TabletPeerCandidates for a specific tablet.

//

// GET  /api/peer_cache?op=show_all[&limit=100]

//   Show all tablets with peer candidates (default limit 1000).

//

// POST /api/peer_cache?op=set&tablet_id=12345

//   Body (JSON):

//   {

//     "candidates": [

//       {"host":"10.0.0.1","brpc_port":8060,"compute_group_id":"cg1"}

//     ],

//     "last_successful_compute_group_id": "cg1",

//     "consecutive_all_miss": 0,

//     "cooldown_until_ms": 0

//   }

//

// POST /api/peer_cache?op=remove&tablet_id=12345

//   Remove all peer candidates for a tablet.

//

// POST /api/peer_cache?op=reset_cooldown&tablet_id=12345

//   Reset cooldown state for a tablet.

class PeerCacheAction : public HttpHandlerWithAuth {

public:

    PeerCacheAction(ExecEnv* exec_env, CloudStorageEngine& engine)

            : HttpHandlerWithAuth(exec_env), _engine(engine) {}

    ~PeerCacheAction() override = default;

    void handle(HttpRequest* req) override;

private:

    Status _handle_show(HttpRequest* req, std::string* result);

    Status _handle_show_all(HttpRequest* req, std::string* result);

    Status _handle_set(HttpRequest* req, std::string* result);

    Status _handle_remove(HttpRequest* req, std::string* result);

    Status _handle_reset_cooldown(HttpRequest* req, std::string* result);

    CloudStorageEngine& _engine;

};

} // namespace doris