// #include <WiFi.h>
// #include <PubSubClient.h>

// const char* ssid = "Wokwi-GUEST";
// const char * pw = "";

// const char* mqtt_sv = "broker.mqtt-dashboard.com";
// const int mqtt_port = 1883;

// WiFiClient espClient;
// PubSubClient client(espClient);

// void connectWF() {
//   WiFi.begin(ssid, pw, 6);
//   Serial.println();
//   while (WiFi.status() != WL_CONNECTED) {
//     Serial.print(".");
//     delay(500);
//   }
//   Serial.print("Connected to ");
//   Serial.println(WiFi.localIP());
// }
// void connectMQTTsv() {
//   while(!client.connect("26-6-24-09-01"));
//     delay(500);
//   Serial.println("Connected to MQTT server");
//   client.subscribe("/MinAh/LED");
// }

// void redirect(char* topic, char* context) {
//   Serial.println("Redireting...");
//   if (strcmp(topic, "/MinAh/LED") == 0)
//     led_management(context);
// }
// void mqttCallback(char* topic, byte* payload, unsigned int length) {
//   payload[length] = 0;
//   Serial.print(topic);
//   Serial.print("  -  ");
//   Serial.println((char*)payload);
//   redirect(topic, (char*)payload);
// }
// void setup() {
//   Serial.begin(115200);
//   pinMode(led, OUTPUT);
//   connectWF();
//   client.setServer(mqtt_sv, mqtt_port);
//   client.setCallback(mqttCallback);
//   connectMQTTsv();
// }
// void loop() {
//   if (!client.connected())
//     connectMQTTsv();
//   client.loop();
// }
//------------------------------------------------------------------------------
#define forLoop(x, n) for(int x = 0; x < n; x++)

#include <DHT.h>
#include <Wire.h>
#include <ESP32Servo.h>
#include <LiquidCrystal_I2C.h>

#define DHTTYPE DHT22

const int button = 5;
const int dht_pin = 18;
const int potentio = 12;
const int simu_flame = 19;

const int piezo = 13;
const int relay = 14;
const int servo_pin = 17;


DHT dht22(dht_pin, DHTTYPE);
LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);
Servo servo;

void setup() {
  Serial.begin(9600);

  dht22.begin();
  pinMode(button, INPUT);
  pinMode(potentio, INPUT);
  pinMode(simu_flame, INPUT);

  LCD.init();
  LCD.backlight();
  pinMode(relay, OUTPUT);
  pinMode(piezo, OUTPUT);
  servo.attach(servo_pin);
}

bool screen = true;
int last_button_state = LOW;

unsigned long debounce = 50;
unsigned long last_debounce = millis();

float dht_humidity = 0, dht_temperature = 0;
unsigned long dht_delay = 2000;
unsigned long dht_previous = millis();

void LCD_display(bool screen, bool renew) {
  if (screen)
    LCD.display();
  else {
    LCD.noDisplay();
    return;
  }

  if (!renew)
    return;

  LCD.clear();

  LCD.setCursor(0, 0);
  LCD.print("Nhiet do: ");
  LCD.print(dht_temperature);
  LCD.print("C");

  LCD.setCursor(0, 1);
  LCD.print("Do am:    ");
  LCD.print(dht_humidity);
  LCD.print("%");
}

void spin(int val) {
  int ang = map(val, 0, 4095, 0, 180);
  servo.write(ang);
  delay(15);
}
void check_flame() {
  int flame = digitalRead(simu_flame);
  if (flame) { // Replicate fire occur
    digitalWrite(relay, LOW);
    tone(piezo, 1000);
  }
  else {
    digitalWrite(relay, HIGH);
    noTone(piezo);
  }
}

void clicking() {
  int val_button = digitalRead(button);
  bool clicked = false;

  if (val_button == HIGH && last_button_state == LOW && millis() - last_debounce > debounce) {
    clicked = true;
  }
  last_button_state = val_button;

  if (clicked)
    screen = !screen;
}

bool rerun_dht() {
  int val_poten = analogRead(potentio);

  bool renew = false;
  dht_delay = map(val_poten, 0, 4095, 1500, 6000);
  if (millis() - dht_previous > dht_delay) {
    dht_previous = millis();
    dht_humidity = dht22.readHumidity();
    dht_temperature = dht22.readTemperature();
    renew = true;
  }
  return renew;
  // return val_poten; // temporary for servo
}

void loop() {
  check_flame();  // DigitalRead
  clicking();     // DigitalRead
  bool renew = rerun_dht();  // AnalogRead
  
  int val_poten = map(analogRead(potentio), 0, 4095, 0, 180);
  spin(val_poten); // Add something to replicate dusk sensor
  LCD_display(screen, renew);
}