// Handle ESP8266 events
void wifi_event_handler(int event, const char* input, const int len) {

  switch(event) {
    case WIFI_EVENT_ANY: {
       //
       // You can display the input
       // To provide debug info
       // This kind of event (ANY)
       // is called for any event
       //
       return;
    } break;

    case WIFI_EVENT_ERROR: {
       // We got error!
    } break;

    // ESP8266 is not responding
    case WIFI_EVENT_TIMEOUT: {
       // We got timeout!
    } break;

    // Wifi was connected
    case WIFI_EVENT_WIFI_CONNECTED: {
       // We are conneted to the access point!
    } break;

    // Wifi was disconnected
    case WIFI_EVENT_WIFI_DISCONNECTED: {
       // We are disconneted to the access point!
    } break;

    // Connect to host
    case WIFI_EVENT_CONNECTED: {
       // We are connected to the ip/url specified earlier throug wifi_link_open
    } break;

    // Host sends data
    case WIFI_EVENT_DATA: {
      //
      // Look for JSON data in response
      //
      search_json(weather_descr, input, "description");
      search_json(weather_name, input, "name");

      search_json(weather_data_buf, input, "humidity");
      sscanf(weather_data_buf, "%lf", &weather_humidity);

      search_json(weather_data_buf, input, "pressure");
      sscanf(weather_data_buf, "%d", &weather_pressure);

      search_json(weather_data_buf, input, "temp");
      sscanf(weather_data_buf, "%lf", &weather_temp);


      // We do not need this connection anymore
      wifi_link_close();

      // Format received data
      sprintf(info1, "%s Weather:", weather_name);
      sprintf(info2, "%s | Temp: %.1lf C | Humidity: %.0lf %% | Pressure: %d HPa", weather_name, weather_temp-273.15, weather_humidity, weather_pressure );

      //
      // Display data continously in text shifting manner
      //  
      int shift = 0;
      const int info_len = strlen(info2);
      int cycles = 0;

      while(1) {
         lcd_clrscr();
         lcd_gotoxy(0, 0);
	       lcd_nputs(info1, 16);
	       lcd_gotoxy(0, 1);
	       lcd_nputs(info2+shift, 16);
	       _delay_ms(500);
	       ++shift;
	       if(shift > info_len - 4) {
             shift = 0;
             ++cycles;   
         }
         //
         // End - return to main and then prepare next fetch request
         //
         if(cycles > 15) break;
      }

      lcd_nputs("Update...", 16);
      lcd_clrscr();
    } break;
  }
}


int main(void) {

  // Init UART
  uart_init(UART_BAUD_SELECT(2400, F_CPU));

  // Init buttons

  //
  // ...
  //

  // Init LCD
  lcd_init(LCD_DISP_ON);
	lcd_gotoxy(0, 0);
	lcd_clrscr();

  // Init wifi and connect to the desired network
  lcd_clrscr();
  lcd_puts("Initializing...");
  _delay_ms(1000);
  wifi_init();

  //
  // Check if any button was pressed
  // then go into settings mode :)
  //

  //
  //  ...
  //

  //
  //  Normal boot sequence
  //
  normal_boot:

  // Display greeting on lcd
  lcd_puts("Hello");
  _delay_ms(1000);
  lcd_clrscr();
  _delay_ms(1500);


  lcd_clrscr();
  lcd_puts("Conecting...");
  _delay_ms(1000);

  //
  // Display USSID/PASSWD data on the screen
  //
  lcd_clrscr();
  lcd_puts("ID: ");
  lcd_puts(USSID);
  lcd_puts("\nPASS: ");
  lcd_puts(PASSWD);
  _delay_ms(1500);

  // Try to connect to the access point
  wifi_connect(USSID, PASSWD);

  while(1) {
    // To make sure nothing dumb trash does not come
    // through UART interface
    uart_flush();

    // Connect to openweathermap
    wifi_link_open("TCP", "api.openweathermap.org", 80);

    // Request data from REST api
    wifi_send("GET /data/2.5/weather?q=warsaw&APPID=cf24c94ac2550178e2ea4e970cd0f416 HTTP/1.1\r\nHost: api.openweathermap.org\r\nConnection: keep-alive\r\nCache-Control: max-age=0\r\n\r\n\r\n");

    // Wifi functions will call wifi_event_handler function on any event (it's callback function)
  }

  return 0;
}