// 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 <glog/logging.h>

#include <functional>

#include <future>

#include <map>

#include <memory>

#include <mutex>

#include <string>

#include "common/config.h"

#include "service/http/http_method.h"

#include "util/string_util.h"

struct evhttp_request;

namespace doris {

class HttpHandler;

enum SendReplyType { REPLY_SYNC = 0, REPLY_ASYNC = 1 };

class HttpRequest {

public:

    HttpRequest(evhttp_request* ev_req);

    ~HttpRequest();

    int init_from_evhttp();

    HttpMethod method() const { return _method; }

    // path + '?' + query

    const std::string& uri() const { return _uri; }

    // return raw path without query string after '?'

    const std::string& raw_path() const { return _raw_path; }

    const std::string& header(const std::string& key) const;

    const std::string& param(const std::string& key) const;

    // return params

    const StringCaseUnorderedMap<std::string>& headers() { return _headers; }

    std::string get_all_headers() const;

    // return params

    std::map<std::string, std::string>* params() { return &_params; }

    const std::map<std::string, std::string>& query_params() const { return _query_params; }

    std::string get_request_body();

    void add_output_header(const char* key, const char* value);

    std::string debug_string() const;

    void set_handler(HttpHandler* handler) { _handler = handler; }

    HttpHandler* handler() const { return _handler; }

    struct evhttp_request* get_evhttp_request() const { return _ev_req; }

    std::shared_ptr<void> handler_ctx() const { return _handler_ctx; }

    void set_handler_ctx(std::shared_ptr<void> ctx) {

        DCHECK(_handler != nullptr);

        _handler_ctx = ctx;

    }

    const char* remote_host() const;

    void mark_send_reply(SendReplyType type = REPLY_ASYNC) { _send_reply_type = type; }

    void set_cancel_callback(std::function<void()> callback);

    void finish_send_reply();

    void wait_finish_send_reply();

private:

    void cancel_async_reply();

    SendReplyType _send_reply_type = REPLY_SYNC;

    HttpMethod _method;

    std::string _uri;

    std::string _raw_path;

    StringCaseUnorderedMap<std::string> _headers;

    std::map<std::string, std::string> _params;

    std::map<std::string, std::string> _query_params;

    struct evhttp_request* _ev_req = nullptr;

    HttpHandler* _handler = nullptr;

    std::shared_ptr<void> _handler_ctx;

    std::string _request_body;

    // ensure send_reply finished

    std::promise<bool> _http_reply_promise;

    std::future<bool> _http_reply_future = _http_reply_promise.get_future();

    std::mutex _cancel_callback_mutex;

    std::function<void()> _cancel_callback;

};

} // namespace doris