#include <Adafruit BusIO.h>
#include <Adafruit_SSD1306.h>
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* auth = "btoNyR6HPdyAlID_AWIfSv26idxDShQ4";

const int motionPin = 4;         // GPIO pin connected to the motion sensor's OUT pin
const int ledPin1 = 2;          // GPIO pin for LED 1
const int ledPin2 = 15;          // GPIO pin for LED 2
const int ledPin3 = 5;          // GPIO pin for LED 3

const unsigned long led1Interval = 20000; // Time interval for LED 1 (in milliseconds)
const unsigned long led2Interval = 3000; // Time interval for LED 2 (in milliseconds)
const unsigned long led3Interval = 20000; // Time interval for LED 3 (in milliseconds)

Adafruit_SSD1306 display(128, 64, &Wire, -1);

int currentLED = 1;             // Variable to track the current LED in the sequence
unsigned long previousMillis = 0; // Variable to store the previous time in milliseconds
int motionThreshold = 400;      // Initial value for motion sensor threshold

BLYNK_WRITE(V1) {  // Blynk slider widget on V1
  motionThreshold = param.asInt();  // Update motion threshold value from the Blynk slider
}

void setup() {
  Serial.begin(115200);
  Blynk.begin(auth, ssid, password);
  
  pinMode(motionPin, INPUT);
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(ledPin3, OUTPUT);

  digitalWrite(ledPin1, HIGH);  // Turn on the first LED initially

  display.begin(SSD1306_SWITCHCAPVCC, 0x3C); // Initialize OLED display
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);
}

void loop() {
  Blynk.run();
  
  int motionState = digitalRead(motionPin);
  unsigned long currentMillis = millis(); // Get the current time in milliseconds

  // If motion is detected while the first LED is glowing and motion threshold is increased above 200,
  // print specific information on the OLED display
  if (currentLED == 1 && motionState == HIGH && motionThreshold > 200) {
    display.clearDisplay();
    display.setCursor(0, 10);
    display.println("Name: ABC");
    display.display();
    delay(4000);
    display.clearDisplay();
    display.println("Car Number: *****");
    display.display();
    delay(4000);
    display.clearDisplay();
    display.println("Fine: Rs. 1000");
    display.display();
    delay(4000);
    display.clearDisplay();
    display.println("Reason: Jumping Red Light");
    display.display();
    delay(4000);
    display.clearDisplay();
  }

  // Toggle the current LED in the sequence based on the time intervals
  if (currentLED == 1 && currentMillis - previousMillis >= led1Interval) {
    digitalWrite(ledPin1, LOW);
    digitalWrite(ledPin2, HIGH);
    previousMillis = currentMillis;
    currentLED = 2;
  } else if (currentLED == 2 && currentMillis - previousMillis >= led2Interval) {
    digitalWrite(ledPin2, LOW);
    digitalWrite(ledPin3, HIGH);
    previousMillis = currentMillis;
    currentLED = 3;
  } else if (currentLED == 3 && currentMillis - previousMillis >= led3Interval) {
    digitalWrite(ledPin3, LOW);
    digitalWrite(ledPin1, HIGH);
    previousMillis = currentMillis;
    currentLED = 1;
  }

  // Check if motion sensor value is above the threshold and print motion state on Blynk terminal
  if (motionState > motionThreshold) {
    Blynk.virtualWrite(V1, "Motion Detected");
  } else {
    Blynk.virtualWrite(V1, "No Motion");
  }

  delay(100);  // Small delay for stability
}