#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <HTTPClient.h>
#include <ArduinoJson.h>
#define ENCODER_CLK 2
#define ENCODER_DT  4
#define ENCODER_SW  16
const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* serverUrl = "http://129.151.244.160/";
unsigned const long interval = 2000;
unsigned long zero = 0;
int counter = 0 ;
int dist ;
int lcdColumns = 16;
int lcdRows = 2;
LiquidCrystal_I2C lcd(0x27, lcdColumns, lcdRows); 
void setup(){
  wifiConnect();
  lcd.init();                    
  lcd.backlight();
  lcd.setCursor(0,1);
  lcd.print("start");
  pinMode(ENCODER_CLK, INPUT);
  pinMode(ENCODER_DT, INPUT);
  pinMode(ENCODER_SW, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(ENCODER_CLK), readEncoder, FALLING);
}
void readEncoder() {
  int bValue = digitalRead(ENCODER_DT);
  if (bValue == HIGH) {
    counter++; 
  }
  if (bValue == LOW) {
    counter--; 
  }
}
void loop() {
  if(millis()-zero > interval){

    HTTPClient http;
    http.begin("http://129.151.244.160/API/getRecords.html");
    int httpResponCode = http.GET();
    if(httpResponCode > 0){
      String payload = http.getString();
      Serial.println(payload);
      char json[500];
      payload.toCharArray(json,500);
      StaticJsonDocument <200> doc ;
      deserializeJson(doc,json);
      lcd.setCursor(0, 0);
      lcd.print("Distance: ");
      lcd.setCursor(0, 1);
      int distance = doc["distance"] ;
      lcd.print(distance);
      lcd.print("cm");
    }else{
      Serial.print("error ");
      Serial.println(httpResponCode);
    }

    zero = millis();
  }
 
}
void wifiConnect(){
   Serial.begin(115200);
  WiFi.begin(ssid, password);
  while(WiFi.status() != WL_CONNECTED){
    delay(100);
    Serial.println(".");
  }
}
void test(){
   int pi = 3.14 ;
  int R = 5 ;
  dist = (2*pi*R)/40 * counter;
}