#ifndef TRANSPORT_MANAGER_H
#define TRANSPORT_MANAGER_H

#include <Arduino.h>
#include <WiFi.h>
#include <functional>
#include "wifi_manager.h"
#include "gsm_manager.h"
#include "config_manager.h"

enum class TransportType {
    NONE,
    WIFI,
    GSM
};

enum class TransportPriority : uint8_t {
    WIFI_PREFERRED = 0,
    GSM_PREFERRED  = 1,
    WIFI_ONLY      = 2,
    GSM_ONLY       = 3
};

class TransportManager {
public:
    void begin(WifiManager& wifi, GsmManager& gsm,
               ConfigManager& config, WiFiClient* wifiClient);
    void loop();

    bool isConnected();
    TransportType getActiveTransport() { return _activeTransport; }
    Client& getClient();

    void setPriority(TransportPriority prio);
    TransportPriority getPriority() { return _priority; }

    int getSignalStrength();
    const char* getTransportName();
    String getConnectionInfo();

    void onTransportChange(std::function<void(TransportType)> callback) {
        _onChangeCallback = callback;
    }

    void forceEvaluate() { _evaluateNow = true; }

    static const char* transportTypeName(TransportType t);

private:
    WifiManager* _wifi;
    GsmManager* _gsm;
    ConfigManager* _config;
    WiFiClient* _wifiClient;

    TransportType _activeTransport;
    TransportPriority _priority;
    bool _evaluateNow;

    std::function<void(TransportType)> _onChangeCallback;

    unsigned long _lastEvaluationMs;
    unsigned long _lastGsmAttemptMs;

    static const unsigned long EVAL_INTERVAL_MS = 10000;
    static const unsigned long GSM_CONNECT_COOLDOWN_MS = 60000;

    void evaluateTransport();
    void switchTransport(TransportType newType);
    bool tryGsmConnect();
};

#endif