#include <Bounce2.h>
#include "U8glib.h"
#define ENCODER_CLK 3
#define ENCODER_DT 2
#define ENCODER_SW 4

U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_DEV_0 | U8G_I2C_OPT_NO_ACK | U8G_I2C_OPT_FAST); // Fast I2C / TWI

//buttons
Bounce2::Button encoder_clk = Bounce2::Button();
Bounce2::Button encoder_dt = Bounce2::Button();
Bounce2::Button encoder_sw = Bounce2::Button();

//images
// 'icon_dashboard', 16x16px
const unsigned char epd_bitmap_icon_dashboard [] PROGMEM = {
	0x07, 0xe0, 0x18, 0x18, 0x21, 0x24, 0x50, 0x02, 0x48, 0x0a, 0x84, 0x01, 0x83, 0x81, 0xa2, 0x45, 
	0x82, 0x41, 0x81, 0x81, 0xa0, 0x05, 0x40, 0x02, 0x4b, 0xd2, 0x23, 0xc4, 0x18, 0x18, 0x07, 0xe0
};
// 'icon_battery', 16x16px
const unsigned char epd_bitmap_icon_battery [] PROGMEM = {
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0xf8, 0x40, 0x04, 0x5b, 0x66, 0x5b, 0x66, 
	0x5b, 0x66, 0x40, 0x04, 0x3f, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
// 'icon_parksensor', 16x16px
const unsigned char epd_bitmap_icon_parksensor [] PROGMEM = {
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfc, 0x00, 0x22, 0x00, 0x25, 0x00, 0xf9, 0x00, 0x00, 0x81, 
	0x0c, 0x85, 0x12, 0x95, 0xd2, 0x95, 0x0c, 0x05, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

// 'scrollbar_background', 8x64px
const unsigned char epd_bitmap_scrollbar_background [] PROGMEM = {
	0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 
	0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 
	0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 
	0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x02, 0x00, 0x00
};
// 'item_sel_outline', 128x21px
const unsigned char epd_bitmap_item_sel_outline [] PROGMEM = {
	0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0, 
	0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 
	0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 
	0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 
	0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 
	0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 
	0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 
	0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 
	0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 
	0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 
	0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 
	0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 
	0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 
	0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 
	0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 
	0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 
	0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 
	0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 
	0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 
	0x3f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe0, 
	0x1f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc0
};

const int NUM_ITEMS = 3;
char menu_item[NUM_ITEMS][20]{
  {"Battery"},
	{"Set Timer"},
	{"4WD Status"}
};

// Array of all bitmaps for convenience. (Total bytes used to store images in PROGMEM = 144)
const int epd_bitmap_allArray_LEN = 3;
const unsigned char* epd_bitmap_allArray[3] = {
	epd_bitmap_icon_battery,
	epd_bitmap_icon_dashboard,
	epd_bitmap_icon_parksensor
};



#define LED_PIN 13

bool led_state = LOW;

void setup() {
  
  //serial monitor
  Serial.begin(115200);
  
  //encoder and button debouncing
  encoder_clk.attach( ENCODER_CLK, INPUT);
  encoder_dt.attach( ENCODER_DT, INPUT);
  encoder_sw.attach( ENCODER_SW, INPUT_PULLUP);
  
  encoder_clk.interval(5);
  encoder_dt.interval(5);
  encoder_sw.interval(5);

  encoder_clk.setPressedState(LOW);
  encoder_dt.setPressedState(LOW);
  encoder_sw.setPressedState(LOW);
  
  //test led
  pinMode(LED_PIN,OUTPUT);
  digitalWrite(LED_PIN,led_state);
  
  //oled screen
  u8g.setFont(u8g_font_tpssb);
  u8g.setColorIndex(1); 

}


void loop() {
  
  encoder_clk.update();
  encoder_dt.update();
  encoder_sw.update();
  
  if (encoder_clk.changed()) {
    // There was a change on the CLK pin
    bool dtValue = encoder_dt.read();
    bool ckValue = encoder_clk.read();
    if (ckValue == LOW && dtValue == HIGH) {
      Serial.println("Rotated clockwise ⏩");
    }
    if (ckValue == LOW && dtValue == LOW) {
      Serial.println("Rotated counterclockwise ⏪");
    }
  }

  if(encoder_sw.pressed()){
    led_state = !led_state;
     digitalWrite(LED_PIN, led_state);
     Serial.println("Button Pressed");
  }

  u8g.firstPage();  
  do {
    
    u8g.drawBitmapP( 4, 2, 16/8, 16, epd_bitmap_allArray[0]); 
    u8g.setFont(u8g_font_7x14);
    u8g.drawStr(26, 15 , menu_item[0]);

    u8g.drawBitmapP( 4, 24, 16/8, 16, epd_bitmap_allArray[1]);
    u8g.setFont(u8g_font_7x14B);
    u8g.drawStr(26, 37 , menu_item[1]);

    u8g.drawBitmapP( 4, 46, 16/8, 16, epd_bitmap_allArray[2]);
    u8g.setFont(u8g_font_7x14);
    u8g.drawStr(26, 59 , menu_item[2]);
 
    u8g.drawBitmapP( 0, 22, 128/8, 21, epd_bitmap_item_sel_outline);
    u8g.drawBitmapP( 120, 0, 8/8, 64, epd_bitmap_scrollbar_background);

  } while( u8g.nextPage() );
  
}