/*
 * Utility for SPIFFS filesystem & Serial console
 */
enum class AdaState {
  Header_A,
  Header_d,
  Header_a,
  Header_CountHi,
  Header_CountLo,
  Header_CountCheck,
  Data_Red,
  Data_Green,
  Data_Blue
};

void handleSerial()
{
  #ifdef WLED_ENABLE_ADALIGHT
  static auto state = AdaState::Header_A;
  static uint16_t count = 0;
  static uint16_t pixel = 0;
  static byte check = 0x00;
  static byte red   = 0x00;
  static byte green = 0x00;
  
  while (Serial.available() > 0)
  {
    yield();
    byte next = Serial.read();
    switch (state) {
      case AdaState::Header_A:
        if (next == 'A') state = AdaState::Header_d;
        break;
      case AdaState::Header_d:
        if (next == 'd') state = AdaState::Header_a;
        else             state = AdaState::Header_A;
        break;
      case AdaState::Header_a:
        if (next == 'a') state = AdaState::Header_CountHi;
        else             state = AdaState::Header_A;
        break;
      case AdaState::Header_CountHi:
        pixel = 0;
        count = next * 0x100;
        check = next;
        state = AdaState::Header_CountLo;
        break;
      case AdaState::Header_CountLo:
        count += next + 1;
        check = check ^ next ^ 0x55;
        state = AdaState::Header_CountCheck;
        break;
      case AdaState::Header_CountCheck:
        if (check == next) state = AdaState::Data_Red;
        else               state = AdaState::Header_A;
        break;
      case AdaState::Data_Red:
        red   = next;
        state = AdaState::Data_Green;
        break;
      case AdaState::Data_Green:
        green = next;
        state = AdaState::Data_Blue;
        break;
      case AdaState::Data_Blue:
        byte blue  = next;
        setRealtimePixel(pixel++, red, green, blue, 0);
        if (--count > 0) state = AdaState::Data_Red;
        else {
          if (!realtimeMode && bri == 0) strip.setBrightness(briLast);
          arlsLock(realtimeTimeoutMs, REALTIME_MODE_ADALIGHT);

          strip.show();
          state = AdaState::Header_A;
        }
        break;
    }
  }
  #endif
}


#if !defined WLED_DISABLE_FILESYSTEM && defined WLED_ENABLE_FS_SERVING
//Un-comment any file types you need
String getContentType(AsyncWebServerRequest* request, String filename){
  if(request->hasArg("download")) return "application/octet-stream";
  else if(filename.endsWith(".htm")) return "text/html";
  else if(filename.endsWith(".html")) return "text/html";
//  else if(filename.endsWith(".css")) return "text/css";
//  else if(filename.endsWith(".js")) return "application/javascript";
  else if(filename.endsWith(".json")) return "application/json";
  else if(filename.endsWith(".png")) return "image/png";
//  else if(filename.endsWith(".gif")) return "image/gif";
  else if(filename.endsWith(".jpg")) return "image/jpeg";
  else if(filename.endsWith(".ico")) return "image/x-icon";
//  else if(filename.endsWith(".xml")) return "text/xml";
//  else if(filename.endsWith(".pdf")) return "application/x-pdf";
//  else if(filename.endsWith(".zip")) return "application/x-zip";
//  else if(filename.endsWith(".gz")) return "application/x-gzip";
  return "text/plain";
}

bool handleFileRead(AsyncWebServerRequest* request, String path){
  DEBUG_PRINTLN("FileRead: " + path);
  if(path.endsWith("/")) path += "index.htm";
  String contentType = getContentType(request, path);
  String pathWithGz = path + ".gz";
  if(SPIFFS.exists(pathWithGz)){
    request->send(SPIFFS, pathWithGz, contentType);
    return true;
  }
  if(SPIFFS.exists(path)) {
    request->send(SPIFFS, path, contentType);
    return true;
  }
  return false;
}

#else
bool handleFileRead(AsyncWebServerRequest*, String path){return false;}
#endif