{# 发送器模板 #}
{% if part == 'header' %}
#pragma once

#include <vector>
#include <cstdint>
#include <string>

/**
 * 数据发送器
 * 用于发送{{ target_message.full_name }}消息
 */
class DataSender {
public:
    DataSender();
    ~DataSender();

    // 初始化连接
    bool initialize(const std::string& host, int port);

    // 发送数据
    bool send(const std::vector<uint8_t>& data);

    // 关闭连接
    void close();

private:
    int socket_fd_;
    bool connected_;
};

{% else %}
#include "sender.h"
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <cstring>

DataSender::DataSender()
    : socket_fd_(-1), connected_(false) {
}

DataSender::~DataSender() {
    close();
}

bool DataSender::initialize(const std::string& host, int port) {
    socket_fd_ = socket(AF_INET, SOCK_STREAM, 0);
    if (socket_fd_ < 0) {
        return false;
    }

    struct sockaddr_in server_addr;
    memset(&server_addr, 0, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(port);
    inet_pton(AF_INET, host.c_str(), &server_addr.sin_addr);

    if (connect(socket_fd_, (struct sockaddr*)&server_addr, sizeof(server_addr)) < 0) {
        ::close(socket_fd_);
        socket_fd_ = -1;
        return false;
    }

    connected_ = true;
    return true;
}

bool DataSender::send(const std::vector<uint8_t>& data) {
    if (!connected_) {
        return false;
    }

    // 先发送数据长度
    uint32_t data_length = data.size();
    if (::send(socket_fd_, &data_length, sizeof(data_length), 0) != sizeof(data_length)) {
        return false;
    }

    // 发送数据
    size_t total_sent = 0;
    while (total_sent < data.size()) {
        ssize_t n = ::send(socket_fd_, data.data() + total_sent,
                          data.size() - total_sent, 0);
        if (n <= 0) {
            return false;
        }
        total_sent += n;
    }

    return true;
}

void DataSender::close() {
    if (socket_fd_ >= 0) {
        ::close(socket_fd_);
        socket_fd_ = -1;
    }
    connected_ = false;
}
{% endif %}