/*
MIT License

Copyright (c) 2021-22 Magnus

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
 */
#ifndef SRC_WIFI_HPP_
#define SRC_WIFI_HPP_

#if defined (ESP8266)
#include <ESP8266WiFi.h>
#else // defined (ESP32)
#include <WiFiClient.h>
#include <WiFiClientSecure.h>
#endif

#define WIFI_DEFAULT_SSID "GravityMon"  // Name of created SSID
#define WIFI_DEFAULT_PWD "password"     // Password for created SSID
#define WIFI_MDNS "gravitymon"          // Prefix for MDNS name

// tcp cleanup, to avoid memory crash.
struct tcp_pcb;
extern struct tcp_pcb* tcp_tw_pcbs;
extern "C" void tcp_abort(struct tcp_pcb* pcb);

class WifiConnection {
 private:
  // WIFI
  WiFiClient _client;
  WiFiClientSecure _secureClient;

  // OTA
  bool _newFirmware = false;
  bool parseFirmwareVersionString(int (&num)[3], const char* version);
  void downloadFile(const char* fname);
  void connectAsync();
  bool waitForConnection(int maxTime = 20);

 public:
  // WIFI
  void init();

  bool connect();
  bool disconnect();
  bool isConnected();
  bool isDoubleResetDetected();
  void stopDoubleReset();
  bool hasConfig();
  String getIPAddress();
  void startPortal();
  void loop();

  WiFiClient& getWifiClient() { return _client; }
  WiFiClientSecure& getWifiClientSecure() { return _secureClient; }
  void closeWifiClient() {
    _client.stop();
    _secureClient.stop();

    // Cleanup memory allocated by open tcp connetions.
    while (tcp_tw_pcbs) tcp_abort(tcp_tw_pcbs);
  }

  // OTA
  bool updateFirmware();
  bool checkFirmwareVersion();
};

// Global instance created
extern WifiConnection myWifi;

#endif  // SRC_WIFI_HPP_

// EOF