#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include "DHTesp.h"
#include "ThingSpeak.h"

const int DHT_PIN = 15;
const int LED_PIN = 13;
const int BUZZER_PIN = 14;
const int POT_PIN = 35;
const int LDR_PIN = 32; 

const char* WIFI_NAME = "Wokwi-GUEST";
const char* WIFI_PASSWORD = "";
const int myChannelNumber = 2792928;
const char* myApiKey = "23IXA047L7QMXPP9";
const char* server = "api.thingspeak.com";

const int TEMP_THRESHOLD = 40;
const int HUMIDITY_THRESHOLD = 50;

DHTesp dhtSensor;
WiFiClient client;
LiquidCrystal_I2C lcd(0x27, 16, 4);

void setup() {
  Serial.begin(2400);
  lcd.init();
  lcd.backlight();
  lcd.print("Initializing ...\n");
  delay(2000);
  lcd.clear();

  pinMode(POT_PIN, INPUT);
  pinMode(LDR_PIN, INPUT);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
  pinMode(LED_PIN, OUTPUT);

  Serial.println("****************** WELCOME TO THE SMART IOT WEATHER STATION ******************");
  delay(3000);
  Serial.println("Wifi Status:\n");
  Serial.println(">Connecting ...\n");

  WiFi.begin(WIFI_NAME, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED) {
    digitalWrite(LED_PIN, HIGH);
    delay(280);
    digitalWrite(LED_PIN, LOW);
    delay(280);
  }

  delay(1000);
  digitalWrite(LED_PIN, HIGH);
  Serial.println(">Wifi connected !");
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
  Serial.println("-------------------------------------------------------");
  Serial.println("Monitoring Interface:\n");
}

void loop() {
   lcd.clear();
  float pot_value = 0;
  float ldr_value = 0;
  float data1;

  pot_value = analogRead(POT_PIN);
  pot_value = map(pot_value, 0, 4095, 0, 100);

  TempAndHumidity data = dhtSensor.getTempAndHumidity();
  data1 = pot_value;

  // Read LDR value and map it to light conditions
  ldr_value = analogRead(LDR_PIN);
  String lightCondition;
  int lightCode;

  if (ldr_value < 150) {
    lightCondition = "Sunny";
    lightCode=4;
  } else if (ldr_value <= 220) {
    lightCondition = "Partly Cloudy";
    lightCode=3;
  } else if (ldr_value <= 470) {
    lightCondition = "Overcast";
    lightCode=2;
  } else if (ldr_value <= 1500) {
    lightCondition = "Rainy/foggy";
    lightCode=1;
  } else {
    lightCondition = "Dark/night)";
    lightCode=0;
  }

  // Send data to ThingSpeak
  ThingSpeak.setField(1, data.temperature);
  ThingSpeak.setField(2, data.humidity);
  ThingSpeak.setField(3, lightCode);
  ThingSpeak.setField(4, data1); // New field for LDR values

  int x = ThingSpeak.writeFields(myChannelNumber, myApiKey);

  // Print data to Serial Monitor
  Serial.println("Temperature Value: " + String(data.temperature, 2) + "°C");
  Serial.println("Humidity Value: " + String(data.humidity, 1) + "%");
  Serial.println("Potentiometer Value: " + String(pot_value, 3) + "%");
  Serial.println("LDR Value: " + String(ldr_value, 2) + " Ohms");

  // Display data on LCD
  lcd.setCursor(0, 0);  // Row 0, Column 0
  lcd.print("T:");      // Display "T:" for temperature
  lcd.print(data.temperature);  // Add temperature value
  lcd.print("C H:");    // Add "H:" for humidity
  lcd.print(data.humidity);
  lcd.print("%");

  lcd.setCursor(0, 1);  // Row 1, Column 0
  lcd.print("light:");  // Display "Lux:" for light
  lcd.print(lightCondition); // Add LDR value

  // Buzzer warning
  if (data.temperature > TEMP_THRESHOLD || data.humidity > HUMIDITY_THRESHOLD) {
    Serial.println("Buzzer sounding");
    tone(BUZZER_PIN, 1000); // Activate buzzer
  } else {
    noTone(BUZZER_PIN); // Deactivate buzzer
  }

  // Data upload status
  Serial.println("Data Upload Status:\n");
  if (x == 200) {
    Serial.println(">Uploaded successfully");
  } else {
    Serial.println(">Pending...");
  }

  Serial.println("-------------------------------------------------------");

  delay(2000);
}