#include <brpc/server.h>
#include <butil/logging.h>

#include "asr.hpp"  //语音识别模块
#include "etcd.hpp" //服务注册模块
#include "logger.hpp"  //日志模块
#include "speech.pb.h" //protobuf框架代码

using namespace bite_im;

namespace bite_im{
class SpeechServiceImpl : public bite_im::SpeechService {
    public:
        SpeechServiceImpl(const ASRClient::ptr &asr_client):
            _asr_client(asr_client){}
        ~SpeechServiceImpl(){}
        void SpeechRecognition(google::protobuf::RpcController* controller,
                       const ::bite_im::SpeechRecognitionReq* request,
                       ::bite_im::SpeechRecognitionRsp* response,
                       ::google::protobuf::Closure* done) {
            LOG_DEBUG("收到语音转文字请求！");
            brpc::ClosureGuard rpc_guard(done);
            //1. 取出请求中的语音数据
            //2. 调用语音sdk模块进行语音识别，得到响应
            std::string err;
            std::string res = _asr_client->recognize(request->speech_content(), err);
            if (res.empty()) {
                LOG_ERROR("{} 语音识别失败！", request->request_id());
                response->set_request_id(request->request_id());
                response->set_success(false);
                response->set_errmsg("语音识别失败:" + err);
                return;
            }
            //3. 组织响应
            response->set_request_id(request->request_id());
            response->set_success(true);
            response->set_recognition_result(res);
        }
    private:
        ASRClient::ptr _asr_client;
};

class SpeechServer {
    public:
        using ptr = std::shared_ptr<SpeechServer>;
        SpeechServer(const ASRClient::ptr asr_client, 
            const Registry::ptr &reg_client,
            const std::shared_ptr<brpc::Server> &server):
            _asr_client(asr_client),
            _reg_client(reg_client),
            _rpc_server(server){}
        ~SpeechServer(){}
        //搭建RPC服务器，并启动服务器
        void start() {
            _rpc_server->RunUntilAskedToQuit();
        }
    private:
        ASRClient::ptr _asr_client;
        Registry::ptr _reg_client;
        std::shared_ptr<brpc::Server> _rpc_server;
};

class SpeechServerBuilder {
    public:
        //构造语音识别客户端对象
        void make_asr_object(const std::string &app_id,
            const std::string &api_key,
            const std::string &secret_key) {
            _asr_client = std::make_shared<ASRClient>(app_id, api_key, secret_key);
        }
        //用于构造服务注册客户端对象
        void make_reg_object(const std::string &reg_host,
            const std::string &service_name,
            const std::string &access_host) {
            _reg_client = std::make_shared<Registry>(reg_host);
            _reg_client->registry(service_name, access_host);
        }
        //构造RPC服务器对象
        void make_rpc_server(uint16_t port, int32_t timeout, uint8_t num_threads) {
            if (!_asr_client) {
                LOG_ERROR("还未初始化语音识别模块！");
                abort();
            }
            _rpc_server = std::make_shared<brpc::Server>();
            SpeechServiceImpl *speech_service = new SpeechServiceImpl(_asr_client);
            int ret = _rpc_server->AddService(speech_service, 
                brpc::ServiceOwnership::SERVER_OWNS_SERVICE);
            if (ret == -1) {
                LOG_ERROR("添加Rpc服务失败！");
                abort();
            }
            brpc::ServerOptions options;
            options.idle_timeout_sec = timeout;
            options.num_threads = num_threads;
            ret = _rpc_server->Start(port, &options);
            if (ret == -1) {
                LOG_ERROR("服务启动失败！");
                abort();
            }
        }
        SpeechServer::ptr build() {
            if (!_asr_client) {
                LOG_ERROR("还未初始化语音识别模块！");
                abort();
            }
            if (!_reg_client) {
                LOG_ERROR("还未初始化服务注册模块！");
                abort();
            }
            if (!_rpc_server) {
                LOG_ERROR("还未初始化RPC服务器模块！");
                abort();
            }
            SpeechServer::ptr server = std::make_shared<SpeechServer>(
                _asr_client, _reg_client, _rpc_server);
            return server;
        }
    private:
        ASRClient::ptr _asr_client;
        Registry::ptr _reg_client;
        std::shared_ptr<brpc::Server> _rpc_server;
};
}