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

#define oled_reset -1

#define screen_width 128
#define screen_height 64

#define GREEN 0x07E0

Adafruit_SSD1306 a(screen_width,screen_height, &Wire, oled_reset);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  if (!a.begin(SSD1306_SWITCHCAPVCC,0x3C)){//address of oled display
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }
  delay(2000);
  a.clearDisplay();
  a.setTextSize(2);
  a.setTextColor(WHITE);
  a.setCursor(16, 25);
  a.println("BiliBili");
  a.display();
  delay(2000);
  a.clearDisplay();
}

void loop() {
  
  drawLike(5,24,a);
  drawCoin(64,28,13,a);
  drawSave(93,24,a);
  a.display();
  // put your main code here, to run repeatedly:
  //a.fillRect(5,24,8,16,WHITE);
  //a.fillRect(15,24,20,16,WHITE);
  //a.fillTriangle(35,24,35,40,30,40,BLACK);
  //a.fillTriangle(15,24,22,24,22,15,WHITE);
  //a.display();
}

void drawLike(int startx,int starty,Adafruit_SSD1306 a){
  //b = int []{};//used for collision detection 
  if (((startx<0 || startx+30>128)||(starty-9<0 || starty+16>128))||(starty<0)){
    a.setTextSize(1);
    a.setTextColor(WHITE);
    a.setCursor(5, 25);
    a.println("The Shape cannot be fully painted!");
    a.display();
    delay(2000);
    a.clearDisplay();
  } 
  else{
    a.fillRect(startx,starty,8,16,WHITE);
    a.fillRect(startx+10,starty,20,16,WHITE);
    a.fillTriangle(startx+30,starty,startx+30,starty+16,startx+25,starty+16,BLACK);
    a.fillTriangle(startx+10,starty,startx+17,starty,startx+17,starty-9,WHITE);
  }
}

void drawCoin(int centerx,int centery,int radius,Adafruit_SSD1306 a){
  a.fillCircle(centerx,centery,radius,WHITE);
  a.drawLine(centerx-radius+ceil(0.5*radius),centery-ceil(0.2*radius),centerx+radius-ceil(0.5*radius),centery-ceil(0.4*radius),BLACK);
  a.drawFastVLine(centerx-radius+ceil(0.55*radius),centery-ceil(0.0625*radius),ceil(0.5*radius),BLACK);
  a.drawFastVLine(centerx+radius-ceil(0.55*radius),centery-ceil(0.0625*radius),ceil(0.5*radius),BLACK);
  a.drawFastVLine(centerx,centery-ceil(0.2*radius),radius,BLACK);
  a.drawFastHLine(centerx-radius+ceil(0.55*radius),centery-ceil(0.0625*radius),ceil(0.9*radius),BLACK);
}

void drawSave(int startx,int starty,Adafruit_SSD1306 a){
  a.fillTriangle(startx,starty,startx+26,starty,startx+13,starty+9.5,WHITE);
  a.fillTriangle(startx+13,starty-9,startx+13,starty+9.5,startx+5,starty+16,WHITE);
  a.fillTriangle(startx+13,starty-9,startx+13,starty+9.5,startx+21,starty+16,WHITE);
}