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

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET -1
#define JUMP_BUTTON 2

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

// 🦖 **Dino (16x16 pixels)**
const unsigned char dinoBitmap[] PROGMEM = {
  0b00000011, 0b00000000,
  0b00000111, 0b00000000,
  0b00001111, 0b00000000,
  0b00001111, 0b00000000,
  0b00011111, 0b00000000,
  0b00011111, 0b10000000,
  0b00011111, 0b11000000,
  0b00001111, 0b11000000,
  0b00001111, 0b11000000,
  0b00001111, 0b10000000,
  0b00001101, 0b10000000,
  0b00000001, 0b00000000,
  0b00000010, 0b00000000,
  0b00000010, 0b00000000,
  0b00000010, 0b00000000,
  0b00000110, 0b00000000
};

// 🌵 **Cactus (8x12 pixels)**
const unsigned char cactusBitmap[] PROGMEM = {
  0b00011000,
  0b00011000,
  0b00011000,
  0b00011000,
  0b00011000,
  0b00011000,
  0b00011000,
  0b00011000,
  0b00111100,
  0b00111100,
  0b00111100,
  0b00111100
};

// **Game Variables**
int dinoX = 10;
int dinoY = 40;
bool isJumping = false;
bool goingUp = true;
int jumpHeight = 18;
int groundLevel = 40;
int obstacleX = SCREEN_WIDTH;
bool gameOver = false;

// **Button Debounce Variables**
unsigned long lastDebounceTime = 0;
unsigned long debounceDelay = 50;

void setup() {
  pinMode(JUMP_BUTTON, INPUT_PULLUP);  // Enable internal pull-up resistor
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    for (;;);
  }
  display.clearDisplay();
}

void loop() {
  if (gameOver) {
    display.clearDisplay();
    display.setTextSize(1);
    display.setTextColor(SSD1306_WHITE);
    display.setCursor(30, 30);
    display.print("GAME OVER!");
    display.display();
    return;
  }

  // **Read Button with Debounce**
  if (millis() - lastDebounceTime > debounceDelay) {
    if (digitalRead(JUMP_BUTTON) == LOW && !isJumping) {
      isJumping = true;
      goingUp = true;
      lastDebounceTime = millis();  // Reset debounce timer
    }
  }

  // **Jump Mechanics**
  if (isJumping) {
    if (goingUp) {
      dinoY -= 3;
      if (dinoY <= (groundLevel - jumpHeight)) {
        goingUp = false;
      }
    } else {
      dinoY += 3;
      if (dinoY >= groundLevel) {
        dinoY = groundLevel;
        isJumping = false;
      }
    }
  }

  // **Move Obstacle**
  obstacleX -= 3;
  if (obstacleX < -10) {
    obstacleX = SCREEN_WIDTH + random(20, 50); // Randomize new position
  }

  // **Check Collision**
  if (obstacleX < dinoX + 12 && obstacleX + 8 > dinoX && dinoY + 12 >= groundLevel) {
    gameOver = true;
  }

  // **Draw Everything**
  display.clearDisplay();
  display.drawLine(0, groundLevel + 12, SCREEN_WIDTH, groundLevel + 12, SSD1306_WHITE);
  display.drawBitmap(dinoX, dinoY, dinoBitmap, 16, 16, SSD1306_WHITE);
  display.drawBitmap(obstacleX, groundLevel, cactusBitmap, 8, 12, SSD1306_WHITE);
  display.display();

  delay(50);
}