#include <SPI.h> //for IIC -Inter intergrated circuit
#include <Wire.h>
#include <Adafruit_GFX.h> // for graphic
#include <Adafruit_SSD1306.h> //for oled screen



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

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET     4 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
// no need to change, always as default

#define LOGO_HEIGHT   32
#define LOGO_WIDTH    32

//https://javl.github.io/image2cpp/
// 'DINO', 32x32px
const unsigned char bitmap_DINO [] PROGMEM = {
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x3f, 0xf0, 0x00, 0x00, 0xef, 0xfc, 0x00, 0x00, 0xef, 0xfc, 0x00, 0x00, 0xff, 0xfc, 
	0x00, 0x00, 0xff, 0xfc, 0x00, 0x00, 0xff, 0xfc, 0x00, 0x00, 0xff, 0xfc, 0x00, 0x00, 0xfe, 0x00, 
	0x00, 0x00, 0xff, 0xe0, 0x0c, 0x00, 0xff, 0xe0, 0x0c, 0x01, 0xfc, 0x00, 0x0c, 0x07, 0xfc, 0x00, 
	0x0e, 0x1f, 0xff, 0x00, 0x0f, 0x1f, 0xff, 0x00, 0x0f, 0xff, 0xff, 0x00, 0x0f, 0xff, 0xfc, 0x00, 
	0x0f, 0xff, 0xfc, 0x00, 0x0f, 0xff, 0xfc, 0x00, 0x03, 0xff, 0xf0, 0x00, 0x03, 0xff, 0xf0, 0x00, 
	0x00, 0x7f, 0xe0, 0x00, 0x00, 0x7f, 0xc0, 0x00, 0x00, 0x7d, 0xc0, 0x00, 0x00, 0x78, 0xc0, 0x00, 
	0x00, 0x78, 0xc0, 0x00, 0x00, 0x60, 0xc0, 0x00, 0x00, 0x78, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00
};
unsigned long dur_t, start_t;
int press_count;
long randheight;
int cntrect = 128;
int cntlower = 46;
bool game = true;

void setup() {
  Serial.begin(9600);
  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3c, safety precheck
    Serial.println(F("SSD1306 allocation failed"));
    while(true){} // Don't proceed, loop forever
  }
  display.clearDisplay();
  pinMode(2, INPUT_PULLUP);
}

void loop() {
  cntrect--;
  //delay(10);
  if(cntrect < 1){
    cntrect = 128;
  } 
  display.clearDisplay();
  display.drawBitmap(0, 25, bitmap_DINO, LOGO_WIDTH, LOGO_HEIGHT, 1); 
  testfillrect();
  testdrawline();
  display.display();
  //randheight = random(10,16);
  if (digitalRead(2) == LOW){
    //display.clearDisplay();
    testdrawbitmap();
    testdrawline();
    testfillrect();
    display.display();
  } 
}

unsigned long counting(int pin){
  start_t = millis();
  while(digitalRead(pin) == LOW){
    //do nothing
  }
  return millis() - start_t;
}



void testdrawbitmap() {
  display.clearDisplay();
  display.drawBitmap(0, 10, bitmap_DINO, LOGO_WIDTH, LOGO_HEIGHT, 1);
  //18， 20 indicates the start position of the picture.
  testfillrect();
  testdrawline();
  display.display();
  delay(1000);

  display.clearDisplay();
  display.drawBitmap(0, 25, bitmap_DINO, LOGO_WIDTH, LOGO_HEIGHT, 1);
  //18， 20 indicates the start position of the picture.
  testfillrect();
  testdrawline();
  display.display();
  delay(1000);
}


void testdrawline() {
  //display.clearDisplay(); // Clear display buffer

  display.drawLine(0, 56, 127, 56, SSD1306_WHITE);
  //0, 0 indicates the position of one end, 127, 63 indicates position of the other end.
  // Update screen with each newly-drawn line
  //delay(1000);
}

void testfillrect(void) {
  //display.clearDisplay();
  
  display.fillRect(cntrect, 46, 5, 10, SSD1306_INVERSE); //cntrect is 128
  //10, 20 are for the position, 50 is the width of rect, 30 is the height of rect.
  
  //delay(1000);
}