#include <Stepper.h>
#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"
#include <LiquidCrystal_I2C.h>
#include <Wire.h>
#include <Keypad.h>

LiquidCrystal_I2C lcd(0x27, 20, 4);

int STEP[] = {15,2,0,4,16};
int DIR[] = {18,19,21,22,23};

struct Itemas {
  int nomor;
  int harga;
};


Itemas itemssssss[] = {
  {1, 3},
  {2, 6},
  {3, 1},
  {4, 2},
  {5, 6}
};

const byte KEYPAD_ROWS = 4;
const byte KEYPAD_COLS = 3;
byte rowPins[KEYPAD_ROWS] = {5, 32, 33, 25};
byte colPins[KEYPAD_COLS] = {26, 27, 14};
char keys[KEYPAD_ROWS][KEYPAD_COLS] = {
  {'1', '2', '3'},
  {'4', '5', '6'},
  {'7', '8', '9'},
  {'X', '0', '>'}
};

byte cursor_char[] = {
  B00000,
  B00000,
  B00000,
  B00000,
  B00000,
  B00000,
  B00000,
  B11111
};

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, KEYPAD_ROWS, KEYPAD_COLS);

void setup() {
  Serial.begin(9600);

  pinMode(17, INPUT_PULLUP);
  for (int i = 0; i < sizeof(STEP) / sizeof(STEP[0]); i++) { pinMode(STEP[i], OUTPUT); }
  for (int i = 0; i < sizeof(DIR) / sizeof(DIR[0]); i++) { pinMode(DIR[i], OUTPUT); }

  LCD_setup();
}

void motor_rotate(int revolusi, int speed, String dir_mode, int step_pin, int dir_pin){
  if (dir_mode == "CW") {
    digitalWrite(dir_pin, HIGH);// jika DIR bernilai HIGH maka stepper akan berputar searah jarum jam
    //Serial.println("Spinning Clockwise...");
  }
  else if (dir_mode == "CCW") {
    digitalWrite(dir_pin, LOW);// jika DIR bernilai LOW maka stepper akan berputar berlawanan arah jarum jam
    //Serial.println("Spinning Counter Clockwise...");
  }
  
  for(int i = 0; i<revolusi; i++)
  {
    digitalWrite(step_pin, HIGH);
    delayMicroseconds(speed); // SEMAKIN KECIL NILAI NYA AKAN SEMAKIN CEPAT
    digitalWrite(step_pin, LOW);
    delayMicroseconds(speed); // SEMAKIN KECIL NILAI NYA AKAN SEMAKIN CEPAT
  }
}

void LCD_setup() {
  Wire.begin(12, 13); // SDA, SCL
  lcd.begin(40, 4);
  lcd.backlight();

  lcd.createChar(0, cursor_char);
}


int cursor_pos = 2;
String nomor_item_asd = "";
void pilih_menu_makanan() {
  lcd.setCursor(0, 0);
  lcd.print("  PILIH NOMOR ITEM  ");
  lcd.setCursor(0, 2);
  lcd.print("=>");
  lcd.setCursor(11, 2);
  lcd.print("> : Enter");
  lcd.setCursor(11, 3);
  lcd.print("X : Hapus");

  char key = keypad.getKey();
  lcd.setCursor((cursor_pos),2);
  lcd.write(0);
  if (key != NO_KEY) {
    if (String(key) == "X"){
      lcd.setCursor(cursor_pos,2);
      lcd.print(" ");
      lcd.setCursor((cursor_pos - 1),2);
      lcd.print(" ");
      cursor_pos -= 1;
      if (cursor_pos == 1){
        cursor_pos = 2;
      }
      nomor_item_asd.remove(nomor_item_asd.length() - 1);
      //Serial.println(cursor_pos);
    }
    else if (String(key) == ">"){
      if (nomor_item_asd.toInt() <= sizeof(itemssssss) / sizeof(itemssssss[0]) && nomor_item_asd.toInt() > 0){
        //Serial.println("kurang dari item");
        //Serial.println(nomor_item_asd.toInt());
        minta_koin(itemssssss[(nomor_item_asd.toInt() - 1)].harga, itemssssss[(nomor_item_asd.toInt() - 1)].nomor);
        cursor_pos = 2;
      }else{
        lcd.setCursor(0,3);
        lcd.print("Salah!");
      }
    }
    else{
      //Serial.println(key);
      lcd.setCursor(cursor_pos,2);
      lcd.print(key);
      cursor_pos += 1;
      //Serial.println(cursor_pos);
      nomor_item_asd = String(nomor_item_asd) + String(key);
    }
  }
}

void jumlah_item() {

}

void minta_koin(int jumlah, int nomor_item){
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Masukkan Koin");
  lcd.setCursor(0, 3);
  lcd.print("Item " + String(nomor_item) + " : " + String(jumlah) + " Coin");
  delay(1000);

  int koin = 0;
  int startMillis = millis();

  lcd.setCursor(0, 1);
  lcd.print(String(koin) + "/" + String(jumlah));

  while ((koin < jumlah) && (millis() - startMillis < 10000)){
    //Serial.println(millis() - startMillis);
    if (digitalRead(17) == LOW){
      startMillis = millis();
      lcd.setCursor(0, 1);
      //Serial.println("button pressed");
      koin += 1;
      lcd.print(String(koin) + "/" + String(jumlah));
      //Serial.println(koin);
      delay(500);
    }
  }

  if (koin >= jumlah){
    lcd.clear();

    lcd.setCursor(0, 0);
    lcd.print("Silahkan Mengambil");
    lcd.setCursor(0, 1);
    lcd.print("Barang Anda!");
    motor_rotate(200, 4000, "CW", STEP[(nomor_item - 1)], DIR[(nomor_item - 1)]);
    delay(2000);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Terimakasih Telah");
    lcd.setCursor(0, 1);
    lcd.print("Membeli");
    delay(3000);

    lcd.clear();
    nomor_item_asd = "";
  }else{
    lcd.clear();
    
    lcd.setCursor(0, 0);
    lcd.print("Pembelian");
    lcd.setCursor(0, 1);
    lcd.print("Di Batalkan");

    delay(3000);
    lcd.clear();
    nomor_item_asd = "";
  }
}


void loop() {
  pilih_menu_makanan();
}