//Libraries
#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <HTTPClient.h>
#include <ArduinoJson.h>

//Define LCD
LiquidCrystal_I2C lcd(0x27,16,2); 

// Declare HTTP client object
HTTPClient http;

//Define API endpoint
const char* apiEndpoint = "https://642be1a0208dfe254721ec1c.mockapi.io/api/v1/Tables/1";

//Declare deserialiseJSON function
void deserialiseJSON (String jsonString);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  //Screen functions
  lcd.init();                     // LCD driver initialization
  lcd.backlight();                // Open the backlight

  //Message functions
  lcd.setCursor(0,0);             // Move the cursor to row 0, column 0
  lcd.print("Booting...");     // The print content is displayed on the LCD

  //WiFi connection
  lcd.setCursor(0,1);
  lcd.print("WIFI CONN.");
  WiFi.begin("Wokwi-GUEST", "", 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
    Serial.print(".");
  }
  lcd.setCursor(0,1);
  lcd.print(" Connected!");
}

void loop() {
  // Make HTTP request
  http.begin(apiEndpoint);
  int httpCode = http.GET();
  
  // Check for successful response
  if (httpCode == HTTP_CODE_OK) {
    Serial.println("HTTP OK");
    String payload = http.getString();
    deserialiseJSON(payload);
  }

  delay(5000); // this speeds up the simulation
}

void deserialiseJSON (String jsonString) {

  // Create a JSON object
  StaticJsonDocument<200> jsonDoc;
  DeserializationError error = deserializeJson(jsonDoc, jsonString);

  // Check for any errors during deserialization
  if (error) {
    Serial.println("Failed to parse JSON");
    return;
  }

  // Extract the balance value
  const char* balance = jsonDoc["balance"];
  
  // Print the balance value
  Serial.println(balance);
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Balance:");
  lcd.setCursor(0,1);
  lcd.print(balance);
}