// 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 <memory>
#include <string>
#include <vector>

#include "kudu/tserver/tablet_server_options.h"
#include "kudu/util/net/sockaddr.h"

namespace kudu {
class HostPort;
class Schema;
class Status;
struct FsManagerOpts;

namespace consensus {
class RaftConfigPB;
} // namespace consensus

namespace tserver {

class TabletServer;

// An in-process tablet server meant for use in test cases.
class MiniTabletServer {
 public:
  // Note: The host portion of 'rpc_bind_addr' is also used for the http service.
  MiniTabletServer(std::string fs_root,
                   const HostPort& rpc_bind_addr,
                   int num_data_dirs = 1);
  ~MiniTabletServer();

  // Return the options which will be used to start the tablet server.
  // If you wish to make changes to these options, they need to be made
  // before calling Start(), or else they will have no effect.
  TabletServerOptions* options() { return &opts_; }

  // Start a tablet server running on the loopback interface and
  // an ephemeral port. To determine the address that the server
  // bound to, call MiniTabletServer::bound_addr().
  // The TS will be initialized asynchronously and then started.
  Status Start();

  // Waits for the tablet server to be fully initialized, including
  // having all tablets bootstrapped.
  Status WaitStarted();

  void Shutdown();

  // Restart a tablet server on the same RPC and webserver ports.
  Status Restart();

  // Add a new tablet to the test server, use the default consensus configuration.
  //
  // Requires that the server has already been started with Start().
  Status AddTestTablet(const std::string& table_id,
                       const std::string& tablet_id,
                       const Schema& schema);

  // Add a new tablet to the test server and specify the consensus configuration
  // for the tablet.
  Status AddTestTablet(const std::string& table_id,
                       const std::string& tablet_id,
                       const Schema& schema,
                       const consensus::RaftConfigPB& config);

  // Return the ids of all non-tombstoned tablets on this server.
  std::vector<std::string> ListTablets() const;

  // Create a RaftConfigPB which should be used to create a local-only
  // tablet on the given tablet server.
  consensus::RaftConfigPB CreateLocalConfig() const;

  const Sockaddr bound_rpc_addr() const;
  const Sockaddr bound_http_addr() const;

  const TabletServer* server() const { return server_.get(); }
  TabletServer* server() { return server_.get(); }

  // Return TS uuid.
  const std::string& uuid() const;

  bool is_started() const { return server_ ? true : false; }

  void FailHeartbeats();

  static void InitFsOpts(int num_data_dirs, const std::string& fs_root,
                         FsManagerOpts* fs_opts);

 private:
  const std::string fs_root_;
  TabletServerOptions opts_;
  std::unique_ptr<TabletServer> server_;
};

} // namespace tserver
} // namespace kudu