#include <ESP32Servo.h>

// ===== PIN SETUP =====
#define LIGHT_PIN 5
#define TV_PIN 18
#define PIR_PIN 13
#define BUZZER_PIN 4
#define SERVO_PIN 14
#define BUTTON_PIN 15  // Push button for manual toggle

Servo gate;

// ===== STATES =====
bool lightState = false;
bool tvState = false;
bool gateOpen = false;
bool lastButtonState = HIGH;

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

  pinMode(LIGHT_PIN, OUTPUT);
  pinMode(TV_PIN, OUTPUT);
  pinMode(PIR_PIN, INPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP);  // Button uses internal pull-up

  gate.attach(SERVO_PIN);

  Serial.println("=== SMART HOME SYSTEM ===");
  Serial.println("Commands:");
  Serial.println("L = Light ON");
  Serial.println("l = Light OFF");
  Serial.println("T = TV ON");
  Serial.println("t = TV OFF");
  Serial.println("O = Gate OPEN");
  Serial.println("C = Gate CLOSE");
}

void loop() {

  // ===== MOTION DETECTION =====
  int motion = digitalRead(PIR_PIN);

  if (motion == HIGH) {
    Serial.println("⚠ Motion Detected!");
    digitalWrite(LIGHT_PIN, HIGH);
    digitalWrite(BUZZER_PIN, HIGH);

    delay(2000); // prevents repeated detection messages
    digitalWrite(BUZZER_PIN, LOW);
  }

  // ===== MANUAL PUSH BUTTON TOGGLE =====
  bool buttonState = digitalRead(BUTTON_PIN);
  if (buttonState == LOW && lastButtonState == HIGH) { // button pressed
    lightState = !lightState;
    tvState = !tvState;
    gateOpen = !gateOpen;

    digitalWrite(LIGHT_PIN, lightState ? HIGH : LOW);
    digitalWrite(TV_PIN, tvState ? HIGH : LOW);
    gate.write(gateOpen ? 90 : 0);

    Serial.println("=== MANUAL TOGGLE ===");
    Serial.print("Light: "); Serial.println(lightState ? "ON" : "OFF");
    Serial.print("TV: "); Serial.println(tvState ? "ON" : "OFF");
    Serial.print("Gate: "); Serial.println(gateOpen ? "OPEN" : "CLOSE");
  }
  lastButtonState = buttonState;

  // ===== SERIAL CONTROL (REMOTE SIMULATION) =====
  if (Serial.available()) {
    char cmd = Serial.read();

    switch (cmd) {

      case 'L':
        digitalWrite(LIGHT_PIN, HIGH);
        lightState = true;
        Serial.println("Light ON");
        break;

      case 'l':
        digitalWrite(LIGHT_PIN, LOW);
        lightState = false;
        Serial.println("Light OFF");
        break;

      case 'T':
        digitalWrite(TV_PIN, HIGH);
        tvState = true;
        Serial.println("TV ON");
        break;

      case 't':
        digitalWrite(TV_PIN, LOW);
        tvState = false;
        Serial.println("TV OFF");
        break;

      case 'O':
        gate.write(90); // Open gate
        gateOpen = true;
        Serial.println("Gate OPEN");
        break;

      case 'C':
        gate.write(0); // Close gate
        gateOpen = false;
        Serial.println("Gate CLOSE");
        break;

      default:
        Serial.println("Invalid Command");
        break;
    }
  }
}