#include <LiquidCrystal_I2C.h>
#include "DHTesp.h"
#include <WiFi.h>
#include <HTTPClient.h>
#include <string.h>
String GET_METHOD = "https://postman-echo.com/get";
String POST_METHOD = "https://postman-echo.com/post";

#define LED_PIN 32
#define DHT_PIN 15
#define PIR_SENSOR 12

LiquidCrystal_I2C lcd(0x27, 20, 4); // set the LCD address to 0x27 for a 16 chars and 2 line display
DHTesp dhtSensor;

void setup() {
  // Config LED_PIN output
  pinMode(LED_PIN, OUTPUT);

  // Setup for serial communication
  Serial.begin(9600);
  Serial.println("ESP32 collecting sensors data");

  // Setup for LCD
  lcd.init(); // initialize the lcd
  lcd.backlight();
  lcd.setCursor(1, 0);
  lcd.print("ESP32 collecting data ...");
  delay(1000);

  // Setup for DHT sensor
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  pinMode(PIR_SENSOR, INPUT);
  Serial.print("Connecting to WiFi");
  //setup for WiFi connection
  WiFi.begin("Wokwi-GUEST", "", 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
    Serial.print(".");
  }
  Serial.println("WiFi Connected!");

}

void loop() {
  lcd.clear();

  // Read data from DHT sensor
  TempAndHumidity data = dhtSensor.getTempAndHumidity();
  int temp = data.temperature;
  int humid = data.humidity;
  String stemp = String(temp) + "C";
  String shumid = String(humid) + "%";

  // Display data on LCD
  lcd.setCursor(0, 0);
  lcd.print("Temp: " + stemp);
  lcd.setCursor(0, 1);
  lcd.print("Humidity: " + shumid);

  // Print data to Serial
  Serial.println("Temp: " + stemp);
  Serial.println("Humidity: " + shumid);

  // Motion detection with PIR sensor
  int pir_value = digitalRead(PIR_SENSOR);
  if (pir_value == 1) {
    digitalWrite(LED_PIN, HIGH);
    Serial.println("Motion detected");
  } else {
    digitalWrite(LED_PIN, LOW);
    Serial.println("Motion ended");
  }

  Serial.println("---");
  if (WiFi.status() == WL_CONNECTED) {
    // GET
    HTTPClient http;
    String serverPath = GET_METHOD + "?temp=24.7&humid=30";
    http.begin(serverPath.c_str()); // Send HTTP GET request
    int httpResponseCode = http.GET();
    if (httpResponseCode > 0) {
      Serial.print("HTTP Response code: "); Serial.println(httpResponseCode);
      String payload = http.getString();
      Serial.println(payload);
    }
    else {
      Serial.print("Error code: "); Serial.println(httpResponseCode);
    }
    http.end();

    // POST
    http.begin(POST_METHOD);
    http.addHeader("Content-Type", "application/json");
    // char* httpRequestData;
    // sprintf(httpRequestData, "{\"temp\": %f,\"humid\": %f }", stemp, shumid);
    String httpRequestData = "{\"temp\": " + String(stemp) +",\"humid\": " + String(shumid) + "}";
    Serial.println(httpRequestData);
    httpResponseCode = http.POST(httpRequestData);

    if (httpResponseCode > 0) {
      Serial.print("HTTP Response code: "); Serial.println(httpResponseCode);
      String payload = http.getString();
      Serial.println(payload);
    }
    else {
      Serial.print("Error code: "); Serial.println(httpResponseCode);
    }
    http.end();

  }
  else {
    Serial.println("WiFi Disconnected");
  }
  delay(3000);

}