// 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.

#include "service/http/action/snapshot_action.h"

#include <gen_cpp/AgentService_types.h>

#include <boost/lexical_cast.hpp>

#include <boost/lexical_cast/bad_lexical_cast.hpp>

#include <sstream>

#include <string>

#include "common/logging.h"

#include "common/status.h"

#include "service/http/http_channel.h"

#include "service/http/http_request.h"

#include "service/http/http_status.h"

#include "storage/snapshot/snapshot_manager.h"

#include "storage/storage_engine.h"

namespace doris {

const std::string TABLET_ID = "tablet_id";

const std::string SCHEMA_HASH = "schema_hash";

SnapshotAction::SnapshotAction(ExecEnv* exec_env, StorageEngine& engine, TPrivilegeHier::type hier,

                               TPrivilegeType::type type)

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

void SnapshotAction::handle(HttpRequest* req) {

    if (!config::enable_snapshot_action) {

        HttpChannel::send_reply(req, HttpStatus::BAD_REQUEST, "feature disabled");

        return;

    }

    LOG(INFO) << "accept one request " << req->debug_string();

    // Get tablet id

    const std::string& tablet_id_str = req->param(TABLET_ID);

    if (tablet_id_str.empty()) {

        std::string error_msg = std::string("parameter " + TABLET_ID + " not specified in url.");

        HttpChannel::send_reply(req, HttpStatus::BAD_REQUEST, error_msg);

        return;

    }

    // Get schema hash

    const std::string& schema_hash_str = req->param(SCHEMA_HASH);

    if (schema_hash_str.empty()) {

        std::string error_msg = std::string("parameter " + SCHEMA_HASH + " not specified in url.");

        HttpChannel::send_reply(req, HttpStatus::BAD_REQUEST, error_msg);

        return;

    }

    // valid str format

    int64_t tablet_id;

    int32_t schema_hash;

    try {

        tablet_id = boost::lexical_cast<int64_t>(tablet_id_str);

        schema_hash = boost::lexical_cast<int32_t>(schema_hash_str);

    } catch (boost::bad_lexical_cast& e) {

        std::string error_msg = std::string("param format is invalid: ") + std::string(e.what());

        HttpChannel::send_reply(req, HttpStatus::BAD_REQUEST, error_msg);

        return;

    }

    VLOG_ROW << "get make snapshot tablet info: " << tablet_id << "-" << schema_hash;

    std::string snapshot_path;

    int64_t ret = _make_snapshot(tablet_id, schema_hash, &snapshot_path);

    if (ret != 0L) {

        std::string error_msg = std::string("make snapshot failed");

        HttpChannel::send_reply(req, HttpStatus::INTERNAL_SERVER_ERROR, error_msg);

        return;

    } else {

        std::stringstream result;

        result << snapshot_path;

        std::string result_str = result.str();

        HttpChannel::send_reply(req, result_str);

    }

    LOG(INFO) << "deal with snapshot request finished! tablet id: " << tablet_id;

}

int64_t SnapshotAction::_make_snapshot(int64_t tablet_id, int32_t schema_hash,

                                       std::string* snapshot_path) {

    TSnapshotRequest request;

    request.tablet_id = tablet_id;

    request.schema_hash = schema_hash;

    Status res = Status::OK();

    bool allow_incremental_clone; // not used

    res = _engine.snapshot_mgr()->make_snapshot(request, snapshot_path, &allow_incremental_clone);

    if (!res.ok()) {

        LOG(WARNING) << "make snapshot failed. status: " << res << ", signature: " << tablet_id;

        return -1L;

    } else {

        LOG(INFO) << "make snapshot success. status: " << res << ", signature: " << tablet_id

                  << ". path: " << *snapshot_path;

    }

    return 0L;

}

} // end namespace doris