// Smart Street Lighting with ESP32
// 6 Zones:
// Zones 1-3: Each has 1 IR sensor + 1 LED
// Zones 4-6: Each has 1 Ultrasonic sensor + 1 LED
// Common LDR, connected to WiFi (Wokwi-GUEST)

#include <WiFi.h>

// === WiFi Configuration ===
const char* ssid = "Wokwi-GUEST";
const char* password = ""; // Open network

// === Pins ===
// LDR
const int LDR_PIN = 32; // Analog only

// Zone 1 (IR)
const int LED1 = 2;
const int IR1 = 15;

// Zone 2 (IR)
const int LED2 = 4;
const int IR2 = 18;

// Zone 3 (IR)
const int LED3 = 5;
const int IR3 = 19;

// Zone 4 (Ultrason)
const int LED4 = 12;
const int TRIG4 = 21;
const int ECHO4 = 25;

// Zone 5 (Ultrason)
const int LED5 = 13;
const int TRIG5 = 22;
const int ECHO5 = 26;

// Zone 6 (Ultrason)
const int LED6 = 14;
const int TRIG6 = 23;
const int ECHO6 = 27;

// Thresholds
const int LDR_THRESHOLD = 2000; // lower = darker
const int DIST_THRESHOLD = 5;  // cm

void setup() {
  Serial.begin(115200);

  // Setup WiFi
  WiFi.begin(ssid, password);
  Serial.print("Connexion au WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\n✅ Connecté au WiFi !");
  Serial.print("Adresse IP : ");
  Serial.println(WiFi.localIP());

  // LED Outputs
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
  pinMode(LED5, OUTPUT);
  pinMode(LED6, OUTPUT);

  // IR Inputs
  pinMode(IR1, INPUT);
  pinMode(IR2, INPUT);
  pinMode(IR3, INPUT);

  // Ultrasonic Pins
  pinMode(TRIG4, OUTPUT);
  pinMode(ECHO4, INPUT);
  pinMode(TRIG5, OUTPUT);
  pinMode(ECHO5, INPUT);
  pinMode(TRIG6, OUTPUT);
  pinMode(ECHO6, INPUT);

  digitalWrite(LED1, LOW);
  digitalWrite(LED2, LOW);
  digitalWrite(LED3, LOW);
  digitalWrite(LED4, LOW);
  digitalWrite(LED5, LOW);
  digitalWrite(LED6, LOW);
}

float readDistanceCM(int trigPin, int echoPin) {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  long duration = pulseIn(echoPin, HIGH, 30000); // 30ms timeout
  float distance = duration * 0.034 / 2;
  return distance;
}

void controlIRZone(int ledPin, int irPin, int ldrValue) {
  int irValue = digitalRead(irPin);

  Serial.print("IR Zone - IR: ");
  Serial.print(irValue);
  Serial.print(" | LDR: ");
  Serial.println(ldrValue);

  if (ldrValue < LDR_THRESHOLD && irValue == HIGH) {
    digitalWrite(ledPin, HIGH);
  } else {
    digitalWrite(ledPin, LOW);
  }
}

void controlUltraZone(int ledPin, int trigPin, int echoPin, int ldrValue) {
  float distance = readDistanceCM(trigPin, echoPin);

  Serial.print("Ultrason Zone - Distance: ");
  Serial.print(distance);
  Serial.print(" cm | LDR: ");
  Serial.println(ldrValue);

  if (ldrValue < LDR_THRESHOLD && distance > 0 && distance < DIST_THRESHOLD) {
    digitalWrite(ledPin, HIGH);
  } else {
    digitalWrite(ledPin, LOW);
  }
}

void loop() {
  int ldrValue = analogRead(LDR_PIN);

  // Zones with IR
  controlIRZone(LED1, IR1, ldrValue);
  controlIRZone(LED2, IR2, ldrValue);
  controlIRZone(LED3, IR3, ldrValue);

  // Zones with Ultrason
  controlUltraZone(LED4, TRIG4, ECHO4, ldrValue);
  controlUltraZone(LED5, TRIG5, ECHO5, ldrValue);
  controlUltraZone(LED6, TRIG6, ECHO6, ldrValue);

  delay(500);
}