#include <U8glib.h>
#include "anim.h"


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

#define BUTTON_UP_PIN 4  // pin for UP button
#define BUTTON_DOWN_PIN 8  // pin for DOWN button
#define BUTTON_ENTER_PIN 12  // pin for ENTER button


int item_selected = 0; // which item in the menu is selected
int item_sel_previous; // previous item - Item before the selected one
int item_sel_next; // next item - Item after the selected one

int button_up_clicked = 0;
int button_down_clicked = 0;
int button_enter_clicked = 0;


void setup() {
  u8g.setFont(u8g_font_tpssb);
  u8g.setColorIndex(1);

	pinMode(BUTTON_UP_PIN, INPUT_PULLUP);
	pinMode(BUTTON_DOWN_PIN, INPUT_PULLUP);
	pinMode(BUTTON_ENTER_PIN, INPUT_PULLUP);

}


void loop() {

	if((digitalRead (BUTTON_UP_PIN) == LOW) && (button_up_clicked == 0)) { // UP button is pressed
		item_selected = item_selected - 1;
		button_up_clicked = 1;  //set button click to only perform once
		if (item_selected < 0) {
			item_selected = NUM_ITEMS - 1;
		}
	}

	if((digitalRead (BUTTON_DOWN_PIN) == LOW) && (button_down_clicked == 0)) { // DOWN button is pressed
		item_selected = item_selected + 1;
		button_down_clicked = 1;  //set button click to only perform once
		if (item_selected >= NUM_ITEMS) {
			item_selected = 0;
		}
	}

	if((digitalRead (BUTTON_UP_PIN) == HIGH) && (button_up_clicked == 1)) { // unclick
		button_up_clicked = 0;
	}

	if((digitalRead (BUTTON_DOWN_PIN) == HIGH) && (button_down_clicked == 1)) { // unclick
		button_down_clicked = 0;
	}


	item_sel_previous = item_selected - 1;
	if(item_sel_previous < 0) {item_sel_previous = NUM_ITEMS-1;}
	item_sel_next = item_selected + 1;
	if(item_sel_next >= NUM_ITEMS) {item_sel_next = 0;}

  u8g.firstPage();
  do{
      
			
			
			// previous item
			u8g.setFont(u8g_font_7x14);
			u8g.drawStr(26,15,menu_items[item_sel_previous]);
			u8g.drawBitmapP(4,2,16/8,16,bitmap_icons[item_sel_previous]);

			// selected item
			u8g.setFont(u8g_font_7x14B);
			u8g.drawStr(26,37,menu_items[item_selected]);
			u8g.drawBitmapP(4,24,16/8,16,bitmap_icons[item_selected]);

			// next item
			u8g.setFont(u8g_font_7x14);
			u8g.drawStr(26,61,menu_items[item_sel_next]);
			u8g.drawBitmapP(4,48,16/8,16,bitmap_icons[item_sel_next]);

			u8g.drawBitmapP(0,22,128/8,21,epd_bitmap_Selected_background);
			u8g.drawBitmapP(120,0,8/8,64,epd_bitmap_Scroll_Bar);
  } while ( u8g.nextPage() );


}