#define BLYNK_TEMPLATE_ID "TMPL3a4HTVMPh"
#define BLYNK_TEMPLATE_NAME "wireless monitering system"
#define BLYNK_AUTH_TOKEN "7Ppe2R3me2BMEwg7tYS5qOeE1OJdfZmG"

#include <WiFi.h>             // ESP32 WiFi library
#include <BlynkSimpleEsp32.h>  // Blynk library for ESP32
#include <Wire.h>              // Library for I2C communication
#include <RTClib.h>            // Library for RTC (Real-Time Clock)

RTC_DS1307 rtc; // RTC object

// Blynk credentials
char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";  
char pass[] = "";

// Pin Definitions for ESP32
const int pirPin = 15;        // PIR sensor pin (ESP32 GPIO15)
const int magneticSensorPin = 27; // Magnetic sensor pin (ESP32 GPIO27)
const int ledPin = 2;         // LED pin (ESP32 GPIO2)
const int routerPin = 4;      // Router control pin (ESP32 GPIO4)

// State variables
int pirState = LOW; // PIR sensor state
int magneticSensorState = LOW; // Magnetic sensor state
bool routerState = false; // Router state
bool ledState = false; // LED state

// Time settings
bool morningMessageSent = false; // Flag for morning message
bool eveningMessageSent = false; // Flag for evening message

// Weekday array
char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

void setup() {
  // Start serial communication
  Serial.begin(115200);

  // Set up I2C communication for RTC: GPIO21 (SCL), GPIO22 (SDA)
  Wire.begin(21, 22);

  // Initialize RTC
  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1); // Halt if RTC is not found
  }

  // Uncomment and set the date and time if RTC needs to be set for the first time
  // rtc.adjust(DateTime(2024, 9, 7, 23, 56, 00));

  // Initialize Blynk
  Blynk.begin(auth, ssid, pass);

  // Pin modes
  pinMode(pirPin, INPUT); // Set PIR sensor pin as input
  pinMode(magneticSensorPin, INPUT_PULLUP); // Set magnetic sensor pin as input with pull-up resistor
  pinMode(ledPin, OUTPUT); // Set LED pin as output
  pinMode(routerPin, OUTPUT); // Set router pin as output

  // Initialize states
  digitalWrite(ledPin, LOW); // Turn off LED initially
  digitalWrite(routerPin, LOW); // Turn off router initially
}

void loop() {
  Blynk.run(); // Run Blynk

  // Get the current time and date from the RTC
  DateTime now = rtc.now();
   
  // Reset Blynk virtual pins
  Blynk.virtualWrite(V1, false);
  Blynk.virtualWrite(V2, false);
  Blynk.virtualWrite(V3, false);
  Blynk.virtualWrite(V4, false);

  // Print current time and date
  Serial.print("Current Date & Time: ");
  Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
  Serial.print(", ");
  Serial.print(now.day(), DEC);
  Serial.print('/');
  Serial.print(now.month(), DEC);
  Serial.print('/');
  Serial.print(now.year(), DEC);
  Serial.print(" - ");
  Serial.print(now.hour(), DEC);
  Serial.print(':');
  Serial.print(now.minute(), DEC);
  Serial.print(':');
  Serial.println(now.second(), DEC);

  // Control the router at the specified times
  controlRouter(now);

  // PIR Sensor: Motion Detection
  pirState = digitalRead(pirPin); // Read PIR sensor state
  if (pirState == HIGH) {
    Serial.println("Motion detected!");
    digitalWrite(ledPin, HIGH); // Turn on LED
    ledState = true;
  } else if (ledState) {
    digitalWrite(ledPin, LOW); // Turn off LED after motion stops
    ledState = false;
  }

  // Magnetic sensor: Check if the door is open or closed
  magneticSensorState = digitalRead(magneticSensorPin); // Read magnetic sensor state
  if (magneticSensorState == LOW) {
    Serial.println("Door is closed.");
  } else {
    Serial.println("Door is open.");
  }

  // Send a message to the Blynk app at specific times
  sendMessage(now);

  delay(1000); // Wait for 1 second before next loop
}

// Control the router based on the time and day
void controlRouter(DateTime now) {
  // Turn router on at 9:58
  if (now.hour() == 9 && now.minute() == 58 && now.second() == 0 && !routerState) {
    Serial.println("ROUTER ON.....");
    routerState = true;
    digitalWrite(routerPin, LOW); // Turn on router
  }
  // Turn router off at 9:59
  if (now.hour() == 9 && now.minute() == 59 && now.second() == 0 && routerState) {
    Serial.println("ROUTER OFF....");
    routerState = false;
    digitalWrite(routerPin, HIGH); // Turn off router
  }
  // Turn router on again at 10:02
  if (now.hour() == 10 && now.minute() == 2 && now.second() == 0 && !routerState) {
    Serial.println("ROUTER ON.....");
    routerState = true;
    digitalWrite(routerPin, LOW); // Turn on router
  }
  // Turn router off again at 10:03
  if (now.hour() == 10 && now.minute() == 3 && now.second() == 0 && routerState) {
    Serial.println("ROUTER OFF....");
    routerState = false;
    digitalWrite(routerPin, HIGH); // Turn off router
  }
}

// Function to send messages to the Blynk app
void sendMessage(DateTime now) {
  // Example: Send a message at 9:40 AM and 4:40 PM
  if (now.hour() == 19 && now.minute() == 58 && magneticSensorState) {
    Serial.println("Time out, door not open!"); // Morning message
    Blynk.virtualWrite(V1, true);
    morningMessageSent = true;
    delay(5000);
    Blynk.virtualWrite(V1, false);
  }
  if (now.hour() == 19 && now.minute() == 59 && !magneticSensorState) {
    Serial.println("Time out, door open!"); // Morning message
    Blynk.virtualWrite(V2, true);
    morningMessageSent = true;
    delay(5000);
    Blynk.virtualWrite(V2, false);
  }
  if (now.hour() == 16 && now.minute() == 40 && magneticSensorState) {
    Serial.println("Time out, door closed!"); // Evening message
    Blynk.virtualWrite(V4, true);
    eveningMessageSent = true;
    delay(5000);
    Blynk.virtualWrite(V4, false);
  }
  if (now.hour() == 16 && now.minute() == 40 && !magneticSensorState) {
    Serial.println("Time out, door not closed!"); // Evening message
    Blynk.virtualWrite(V3, true);
    eveningMessageSent = true;
    delay(5000);
    Blynk.virtualWrite(V3, false);
  }
}