#pragma once
#include <LittleFS.h>
#include <settings.pb.h>

class Settings {
public:
    Settings();
    ~Settings();

    // Set callback that gets called when settings change
    void setChangeCallback(std::function<void(const settings_SettingsData&)> callback);

    // Load settings from LittleFS, use defaults if file doesn't exist
    bool load();

    // Save current settings to LittleFS
    bool save();

    // Get reference to settings data
    settings_SettingsData& getData() { return data_; }

    // Set settings data and update timestamp/version
    void setData(const settings_SettingsData& newData);

    // Reset to default values
    void resetToDefaults();

private:
    void runCallback();
    settings_SettingsData data_;
    const char* filename_ = "/settings.pb";
    std::function<void(const settings_SettingsData&)> changeCallback_ = nullptr;
    SemaphoreHandle_t dataMutex_ = nullptr;


    // Default values
    static constexpr const char* DEFAULT_SYNC_SERVER_URL = "https://sync.example.com/api";
    static constexpr const char* DEFAULT_DEVICE_API_KEY = "";
    static constexpr uint32_t DEFAULT_SYNC_INTERVAL = 1800;
    static constexpr bool DEFAULT_AUTO_SYNC = true;
    static constexpr settings_WifiMode DEFAULT_WIFI_MODE = settings_WifiMode_WIFI_MODE_AP_STATION;
    static constexpr const char* DEFAULT_STATION_SSID = "HOME";
    static constexpr const char* DEFAULT_STATION_PASSWORD = "redacted";
    static constexpr const char* DEFAULT_AP_SSID = "RFID-Master-AP";
    static constexpr const char* DEFAULT_AP_PASSWORD = "rfid12345";
    static constexpr uint32_t DEFAULT_AP_CHANNEL = 6;
    static constexpr bool DEFAULT_ENABLE_FALLBACK_AP = true;
    static constexpr settings_LogLevel DEFAULT_LOG_LEVEL = settings_LogLevel_LOG_LEVEL_INFO;
    static constexpr uint32_t DEFAULT_VERSION = 1;

    // Helper methods
    void setDefaults();
    bool fileExists();
};

extern Settings settings;