#include <Arduino.h>
#include "DFRobotDFPlayerMini.h"

#define pirPin 34
#define ledPin 2
#define RELAY_PIN 15
HardwareSerial dfSerial(2);
DFRobotDFPlayerMini myDFPlayer;

// Create variables:
int val = 0;
bool motionState = false; // We start with no motion detected.
unsigned long lastRelayTime = 0; // Track when relay was last used

void animation();

void setup() {
  dfSerial.begin(9600, SERIAL_8N1, 16, 17);
  Serial.begin(9600);
  Serial.println("Initializing DFPlayer...");

  delay(2000);
  if (!myDFPlayer.begin(dfSerial)) {
    Serial.println("DFPlayer failed!");
    while(true) delay(1000);
  }
  Serial.println("DFPlayer online");
  myDFPlayer.volume(15);

  // Configure the pins as input or output:
  pinMode(ledPin, OUTPUT);
  pinMode(pirPin, INPUT);
  // pinMode(BUTTON_PIN, INPUT_PULLDOWN);
   pinMode(RELAY_PIN, OUTPUT);
  digitalWrite(RELAY_PIN, HIGH);
  
}

void loop() {
  // Read out the pirPin and store as val:
  val = digitalRead(pirPin);

  // If motion is detected (pirPin = HIGH), do the following:
  if (val == HIGH) {
    digitalWrite(ledPin, HIGH); // Turn on the on-board LED.

    // Change the motion state to true (motion detected):
    // Add cooldown period after relay use to prevent false triggers
    if (motionState == false && (millis() - lastRelayTime > 2000)) {
      Serial.print("[");
      Serial.print(millis());
      Serial.println("ms] Motion detected!");
      animation();
      lastRelayTime = millis(); // Update relay usage time
      motionState = true;
    }
  }

  // If no motion is detected (pirPin = LOW), do the following:
  else {
    digitalWrite(ledPin, LOW); // Turn off the on-board LED.

    // Change the motion state to false (no motion):
    if (motionState == true) {
      Serial.println("Motion ended!");
      motionState = false;
    }
  }
}

void animation(){
      // Add timestamp
      Serial.print("[");
      Serial.print(millis());
      Serial.print("ms] Starting animation - Relay ON");

      digitalWrite(RELAY_PIN, LOW);
      delay(100); // Small delay to let relay settle

      int track = random(2,6);
      Serial.print(" - Playing track: ");
      Serial.println(track);

      myDFPlayer.play(track);
      delay(5000);

      digitalWrite(RELAY_PIN, HIGH);
      delay(100); // Small delay to let relay settle

      Serial.print("[");
      Serial.print(millis());
      Serial.println("ms] Animation complete - Relay OFF");
      return;
}