#include "data_handler.h"
#include "spdlog/spdlog.h"
#include "vendor/nlohmann/json.hpp" 

using json = nlohmann::json;

DataHandler::DataHandler(MqttClient& client) : m_client(client) {}

void DataHandler::handle(mqtt::const_message_ptr msg) {
    spdlog::info("DataHandler is processing message from topic: {}", msg->get_topic());
    try {
        // (这里是原来 MqttRouter 中处理数据上报的逻辑)
        auto received_json = json::parse(msg->get_payload_str());
        if (received_json.contains("temperature")) {
            double temp = received_json["temperature"];
            json forward_json;
            forward_json["source_topic"] = msg->get_topic();
            forward_json["processed_temp"] = temp;
            forward_json["timestamp"] = time(0);
            const std::string output_topic = "proxy/processed/temperature";
            m_client.publish(output_topic, forward_json.dump());
        }
    } catch (const json::parse_error& e) {
        spdlog::error("JSON parse error in DataHandler: {}", e.what());
    }
}