#include "MockDDS.h"
#include <map>
#include <mutex>

namespace MockDDS {

static std::map<std::string, std::string> g_last_message;
static std::mutex g_mtx;

void publish(const std::string &topic, const std::string &msg) {
    std::lock_guard<std::mutex> lk(g_mtx);
    g_last_message[topic] = msg;
}

std::string take_last(const std::string &topic) {
    std::lock_guard<std::mutex> lk(g_mtx);
    auto it = g_last_message.find(topic);
    if (it == g_last_message.end()) return std::string();
    return it->second;
}

void clear_all() {
    std::lock_guard<std::mutex> lk(g_mtx);
    g_last_message.clear();
}

} // namespace MockDDS