#ifndef WiFiSettingsService_h
#define WiFiSettingsService_h

#include <StatefulService.h>
#include <FSPersistence.h>
#include <HttpEndpoint.h>
#include <JsonUtils.h>

#define WIFI_SETTINGS_FILE "/config/wifiSettings.json"
#define WIFI_SETTINGS_SERVICE_PATH "/rest/wifiSettings"
#define WIFI_RECONNECTION_DELAY 1000 * 30

#ifndef FACTORY_WIFI_SSID
#define FACTORY_WIFI_SSID ""
#endif

#ifndef FACTORY_WIFI_PASSWORD
#define FACTORY_WIFI_PASSWORD ""
#endif

#ifndef FACTORY_WIFI_HOSTNAME
#define FACTORY_WIFI_HOSTNAME ""
#endif

class WiFiSettings {
 public:
  // core wifi configuration
  String ssid;
  String password;
  String hostname;
  bool staticIPConfig;

  // optional configuration for static IP address
  IPAddress localIP;
  IPAddress gatewayIP;
  IPAddress subnetMask;
  IPAddress dnsIP1;
  IPAddress dnsIP2;

  static void serialize(WiFiSettings& settings, JsonObject& root) {
    // connection settings
    root["ssid"] = settings.ssid;
    root["password"] = settings.password;
    root["hostname"] = settings.hostname;
    root["static_ip_config"] = settings.staticIPConfig;

    // extended settings
    JsonUtils::writeIP(root, "local_ip", settings.localIP);
    JsonUtils::writeIP(root, "gateway_ip", settings.gatewayIP);
    JsonUtils::writeIP(root, "subnet_mask", settings.subnetMask);
    JsonUtils::writeIP(root, "dns_ip_1", settings.dnsIP1);
    JsonUtils::writeIP(root, "dns_ip_2", settings.dnsIP2);
  }

  static void deserialize(JsonObject& root, WiFiSettings& settings) {
    settings.ssid = root["ssid"] | FACTORY_WIFI_SSID;
    settings.password = root["password"] | FACTORY_WIFI_PASSWORD;
    settings.hostname = root["hostname"] | FACTORY_WIFI_HOSTNAME;
    settings.staticIPConfig = root["static_ip_config"] | false;

    // extended settings
    JsonUtils::readIP(root, "local_ip", settings.localIP);
    JsonUtils::readIP(root, "gateway_ip", settings.gatewayIP);
    JsonUtils::readIP(root, "subnet_mask", settings.subnetMask);
    JsonUtils::readIP(root, "dns_ip_1", settings.dnsIP1);
    JsonUtils::readIP(root, "dns_ip_2", settings.dnsIP2);

    // Swap around the dns servers if 2 is populated but 1 is not
    if (settings.dnsIP1 == INADDR_NONE && settings.dnsIP2 != INADDR_NONE) {
      settings.dnsIP1 = settings.dnsIP2;
      settings.dnsIP2 = INADDR_NONE;
    }

    // Turning off static ip config if we don't meet the minimum requirements
    // of ipAddress, gateway and subnet. This may change to static ip only
    // as sensible defaults can be assumed for gateway and subnet
    if (settings.staticIPConfig &&
        (settings.localIP == INADDR_NONE || settings.gatewayIP == INADDR_NONE || settings.subnetMask == INADDR_NONE)) {
      settings.staticIPConfig = false;
    }
  }
};

class WiFiSettingsService : public StatefulService<WiFiSettings> {
 public:
  WiFiSettingsService(AsyncWebServer* server, FS* fs, SecurityManager* securityManager);

  void begin();
  void loop();

 private:
  HttpEndpoint<WiFiSettings> _httpEndpoint;
  FSPersistence<WiFiSettings> _fsPersistence;
  unsigned long _lastConnectionAttempt;

#ifdef ESP32
  bool _stopping;
  void onStationModeDisconnected(WiFiEvent_t event, WiFiEventInfo_t info);
  void onStationModeStop(WiFiEvent_t event, WiFiEventInfo_t info);
#elif defined(ESP8266)
  WiFiEventHandler _onStationModeDisconnectedHandler;
  void onStationModeDisconnected(const WiFiEventStationModeDisconnected& event);
#endif

  void reconfigureWiFiConnection();
  void manageSTA();
};

#endif  // end WiFiSettingsService_h