#include <IRremote.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

int PIR_PIN = 23;
int IR_RECEIVE_PIN = 13;
int LED_PIN = 4;
int brightness = 0;  // start with 0 brightness
int fadeAmount = 1;  // set how much to increase or decrease the brightness each time (lower value will make the fade smoother)
int ledState = LOW;  // the initial state of the LED
unsigned long motionStartTime = 0;
int pirState = LOW;  // the initial state of the PIR sensor
int textY = 0;
const int maxMessages = 8;
String messages[maxMessages] = { "", "", "", "", "", "", "", "" };
int currentMessage = 0;

bool isMotionSensorActive = false;

bool isPressed = true;
bool motionSensorModeButtonState = false;
bool motionSensorActive = false;  // Add this variable at the top of the file

IRrecv irrecv(IR_RECEIVE_PIN);
decode_results results;

void setup() {
  pinMode(LED_PIN, OUTPUT);
  pinMode(PIR_PIN, INPUT);
  digitalWrite(LED_PIN, LOW);
  Serial.begin(115200);
  irrecv.enableIRIn();


  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println("SSD1306 allocation failed");
    for (;;);
  }
}

void loop() {
  if (irrecv.decode(&results)) {
    Serial.println(results.value, HEX);
    Serial.println("boot here");
    switch (results.value) {
      case 0xF0DB1AE0:  // Power button
        motionSensorModeButtonState = !motionSensorModeButtonState;
        if (motionSensorModeButtonState) {
          Serial.println("Motion Sensor Mode ON");
          delay(100);
          display.clearDisplay();
          display.setTextSize(0.5);
          display.setTextColor(WHITE);
          display.setCursor(0, 0);
          // Display static text
          display.println("Motion Sensor Mode ON");
          display.display();
          delay(100);
          display.clearDisplay();
        } else {
          Serial.println("Motion Sensor Mode OFF");
          analogWrite(LED_PIN, 0);
          ledState = LOW;
          brightness = 0;
          fadeAmount = 1;
          motionStartTime = 0;

          display.clearDisplay();
          display.setTextSize(0.5);
          display.setTextColor(WHITE);
          display.setCursor(0, 0);
          // Display static text
          display.println("Motion Sensor Mode OFF");
          display.display();
        }
        break;
      case 0x6B7832FF:  //  button 1 (alternative code)
        if (motionSensorModeButtonState) {
          motionSensorModeButtonState = false;
          Serial.println("Cancelling Motion Sensor Mode");
        }
        ledState = !ledState;
        if (ledState) {
          display.clearDisplay();
          display.setTextSize(0.5);
          display.setTextColor(WHITE);
          display.setCursor(0, 0);
          Serial.println("Fading ON LED");
          display.println("Fading ON LED");
          display.display();
          fadeOn();
          display.clearDisplay();
          display.display();
          ledState = HIGH;
        } else {
          display.clearDisplay();
          display.setTextSize(0.5);
          display.setTextColor(WHITE);
          display.setCursor(0, 0);
          Serial.println("Fading OFF LED");
          display.println("Fading OFF LED");
          display.display();
          fadeOff();
          display.clearDisplay();
          display.display();
        }
        break;
      default:
        break;
    }
    irrecv.resume();
    //display.setCursor(0,0);
  }

  if (motionSensorModeButtonState) {
  pirState = digitalRead(PIR_PIN);
  if (pirState == HIGH) {
    if (ledState == LOW) {
      fadeOn();
      ledState = HIGH;
    }
    messages[currentMessage] = "Motion detected!";
    Serial.println(messages[currentMessage]);
  } else if (pirState == LOW) {
    if (ledState == HIGH) {
      fadeOff();
      if (brightness <= 0) {
        analogWrite(LED_PIN, 0);
        ledState = LOW;
      }
    }
    messages[currentMessage] = "No motion detected!";
    Serial.println(messages[currentMessage]);
  }

  display.clearDisplay(); // Clear the OLED display
  display.setTextSize(0.5);
  display.setTextColor(WHITE);

  for (int i = maxMessages - 1 ; i >= 0; i--) {
    display.setCursor(0, (maxMessages - 1 - i) * 8); // Set cursor to the current line
    display.println(messages[(currentMessage - i + maxMessages) % maxMessages]);
  }

  display.display();

  currentMessage = (currentMessage + 1) % maxMessages; // Update the current message index
  delay(10); // Add a delay to control the update speed
}
}






void fadeOn() {
  while (brightness < 127) {
    analogWrite(LED_PIN, brightness);          // set the LED strip brightness
    brightness = brightness + fadeAmount;  // increase the brightness
    delay(3);
    //Serial.println(brightness);
  }
}

void fadeOff() {
  while (brightness >= 0) {
    analogWrite(LED_PIN, brightness);          // set the LED strip brightness
    brightness = brightness - fadeAmount;  // increase the brightness
    delay(3);
    //Serial.println(brightness);
  }
  brightness = 0;
  //Serial.println(brightness);
}

// void motionSensorMode() {
//   isMotionSensorActive = true;

//   while (isMotionSensorActive) {
//     pirState = digitalRead(PIR_PIN);

//     if (pirState == HIGH) {
//       Serial.println("Motion detected!");
//       if (ledState == LOW) {
//         fadeOn();
//         ledState = HIGH;
//       }
//     } else if (pirState == LOW) {
//       Serial.println("No motion detected!");
//       if (ledState == HIGH) {
//         fadeOff();
//         if (brightness <= 0) {
//           analogWrite(LED_PIN, 0);
//           ledState = LOW;
//         }
//       }
//     }
//     delay(10);

//     // Check for remote button press to toggle the motion sensor mode
//     if (irrecv.decode(&results)) {
//       if (results.value == 0x3D9AE3F7) {
//         Serial.println("Toggling Motion Sensor Mode");
//         isMotionSensorActive = !isMotionSensorActive;
//         motionSensorModeButtonState = !motionSensorModeButtonState;
//       }
//       irrecv.resume();
//     }
//   }

//   // Reset LED and brightness values when exiting motion sensor mode
//   analogWrite(LED_PIN, 0);
//   ledState = LOW;
//   brightness = 0;
//   fadeAmount = 1;
//   motionStartTime = 0;
// }