#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_AHTX0.h>

#define SCREEN_WIDTH 128   // OLED display width in pixels
#define SCREEN_HEIGHT 64   // OLED display height in pixels
#define OLED_RESET    -1   // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
Adafruit_AHTX0 aht;

const int buttonPin = 4;  // Button connected to pin 4
const int redPin = 5;     // RGB LED Red connected to pin 5
const int greenPin = 17;  // RGB LED Green connected to pin 17
const int bluePin = 16;   // RGB LED Blue connected to pin 16


const unsigned char PROGMEM leftArrowBitmap[] = {
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
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	0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 
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	0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 
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	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 
	0x00, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 
	0x00, 0x00, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 
	0x00, 0x00, 0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 
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	0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 
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	0x00, 0x00, 0x00, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x38, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};



// Bitmap for Right Arrow (32x32 pixels)
const unsigned char PROGMEM rightArrowBitmap[] = {
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x03, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 
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	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 
	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 
	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 
	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 
	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 
	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 0x00, 0x00, 
	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 
	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 
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	0x00, 0x00, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x03, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xff, 0xff, 0xff, 0x80, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xff, 0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xff, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xff, 0xff, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00, 
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

// OLED Class to handle bitmaps
class OLED {
  public:
    void setup() {
      if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3C for 128x64
        Serial.println(F("SSD1306 allocation failed"));
        for (;;);  // Don't proceed, loop forever
      }
      display.clearDisplay();
      display.display();
    }

    void drawLeftArrow() {
      display.clearDisplay();
      display.drawBitmap(0, 0, leftArrowBitmap, SCREEN_WIDTH, SCREEN_HEIGHT, SSD1306_WHITE);  // Draw left arrow covering the full screen
      display.display();
    }

    void drawRightArrow() {
     display.clearDisplay();
     display.drawBitmap(0, 0, rightArrowBitmap, SCREEN_WIDTH, SCREEN_HEIGHT, SSD1306_WHITE);  // Draw right arrow covering the full screen
     display.display();
    }

    void drawTempAndHumidity(float temp, float humidity) {
      display.clearDisplay();
      display.setCursor(0, 0);       // Start at top-left corner
      display.println(F("Temp:"));
      display.println(temp);
      display.println(F("C"));
      display.println(F("Volog:"));
      display.println(humidity);
      display.println(F("%"));
      display.display();
  }

    void clearDisplay() {
      display.clearDisplay();
      display.display();
    }
};



class RGB_LED {
  private:
    int redPin;
    int greenPin;
    int bluePin;
    int mode = 0;                // Current mode (0: solid, 1: blinking, 2: pulsing, 3: police)
    unsigned long prevMillis = 0;
    const long interval = 500;    // Interval for blinking mode
    const long policeInterval = 200; // Interval for police mode blinking
    int policeState = 0;          // State of police mode blinking sequence
    bool ledState = false;        // Used for blinking

  public:
    RGB_LED(int r, int g, int b) : redPin(r), greenPin(g), bluePin(b) {}

    void setup() {
      pinMode(redPin, OUTPUT);
      pinMode(greenPin, OUTPUT);
      pinMode(bluePin, OUTPUT);
      setColor(255, 0, 0);  // Default color (Red)
    }

    void setColor(int r, int g, int b) {
      analogWrite(redPin, r);
      analogWrite(greenPin, g);
      analogWrite(bluePin, b);
    }

    void nextMode() {
      mode = (mode + 1) % 4;  // Cycle through 4 modes (added police mode)
    }

    void update(unsigned long currentMillis) {
      if (mode == 0) {
        // Solid color (Red)
        setColor(255, 0, 0);
      } else if (mode == 1) {
        // Blinking mode
        if (currentMillis - prevMillis >= interval) {
          prevMillis = currentMillis;
          ledState = !ledState;
          if (ledState) {
            setColor(0, 255, 0);  // Green when ON
          } else {
            setColor(0, 0, 0);    // OFF
          }
        }
      } else if (mode == 2) {
        // Pulsing mode (Blue, smooth transition)
        int brightness = (sin(currentMillis / 500.0) * 127.5) + 127.5;
        setColor(0, 0, brightness);
      } else if (mode == 3) {
        // Police mode: Red blink twice, Blue blink twice
        if (currentMillis - prevMillis >= policeInterval) {
          prevMillis = currentMillis;
          policeState = (policeState + 1) % 4;  // Cycle through 4 states
          
          if (policeState == 0 || policeState == 1) {
            setColor(255, 0, 0);  // Red on
          } else if (policeState == 2 || policeState == 3) {
            setColor(0, 0, 255);  // Blue on
          } else {
            setColor(0, 0, 0);    // Off
          }
        }
      }
    }
};










class Speaker {
  private:
    const int speakerPin = 19;
    const int clickFrequency = 250 ;// Frequency in Hz
    const int clickDuration = 100;   // Duration in milliseconds

  public:
    void setup() {
      pinMode(speakerPin, OUTPUT);
    }

    void click() {
      tone(speakerPin, clickFrequency, clickDuration);
    }
};

class AsyncTurnSignal {
  private:
    const int leftTurnSwitch = 2;
    const int rightTurnSwitch = 15;
    const int leftTurnRelay = 25;
    const int rightTurnRelay = 26;
    const int leftDRL = 27;
    const int rightDRL = 14;
    bool leftTurnState = false;
    bool rightTurnState = false;
    unsigned long previousMillisTurn = 0;
    const long turnInterval = 450; // Interval for turn signal blinking (2 times per second)
    Speaker speaker;
    OLED oled;
    RGB_LED rgbLED;


    void updateTurnState() {
      leftTurnState = digitalRead(leftTurnSwitch) == LOW;
      rightTurnState = digitalRead(rightTurnSwitch) == LOW;
    }

    void blinkTurnSignals(unsigned long currentMillis) {
      if (currentMillis - previousMillisTurn >= turnInterval) {
        previousMillisTurn = currentMillis;

        if (leftTurnState) {
          digitalWrite(leftDRL, LOW);  // Turn off both DRLs before blinking
          digitalWrite(rightDRL, LOW);

          digitalWrite(leftTurnRelay, !digitalRead(leftTurnRelay));
          digitalWrite(leftDRL, digitalRead(leftTurnRelay));  // Blink left DRL in sync with turn signal
          speaker.click();  // Play relay click sound

          // Blink left arrow on OLED
          if (digitalRead(leftTurnRelay) == HIGH) {
            oled.drawLeftArrow();
          } else {
            oled.clearDisplay();
          }
        } else if (rightTurnState) {
          digitalWrite(leftDRL, LOW);  // Turn off both DRLs before blinking
          digitalWrite(rightDRL, LOW);

          digitalWrite(rightTurnRelay, !digitalRead(rightTurnRelay));
          digitalWrite(rightDRL, digitalRead(rightTurnRelay));  // Blink right DRL in sync with turn signal
          speaker.click();  // Play relay click sound

          // Blink right arrow on OLED
          if (digitalRead(rightTurnRelay) == HIGH) {
            oled.drawRightArrow();
          } else {
            oled.clearDisplay();
          }
        } else {
          digitalWrite(leftTurnRelay, LOW);
          digitalWrite(rightTurnRelay, LOW);
          digitalWrite(leftDRL, HIGH);  // Turn on left DRL
          digitalWrite(rightDRL, HIGH);  // Turn on right DRL
          oled.clearDisplay();  // Clear OLED display
        }
      }
    }

  public:
    AsyncTurnSignal() : rgbLED(redPin, greenPin, bluePin) {}

    void setup() {
      pinMode(leftTurnSwitch, INPUT_PULLUP);
      pinMode(rightTurnSwitch, INPUT_PULLUP);
      pinMode(leftTurnRelay, OUTPUT);
      pinMode(rightTurnRelay, OUTPUT);
      pinMode(leftDRL, OUTPUT);
      pinMode(rightDRL, OUTPUT);
      pinMode(buttonPin, INPUT_PULLUP);  // Setup button with internal pullup resistor

      digitalWrite(leftTurnRelay, LOW);
      digitalWrite(rightTurnRelay, LOW);
      digitalWrite(leftDRL, HIGH);  // Turn on DRL
      digitalWrite(rightDRL, HIGH);  // Turn on DRL

      speaker.setup();
      oled.setup();
      rgbLED.setup();
    }

    void loop() {
      unsigned long currentMillis = millis();
      updateTurnState();
      blinkTurnSignals(currentMillis);

      // Check if button is pressed
      if (digitalRead(buttonPin) == LOW) {
        delay(200);  // Debounce delay
        rgbLED.nextMode();  // Change RGB LED mode
      }

      rgbLED.update(currentMillis);  // Update the RGB LED state
    }
};

AsyncTurnSignal asyncTurnSignal;

void setup() {
  asyncTurnSignal.setup();
}

void loop() {
  asyncTurnSignal.loop();
}