/***************************************************
  Screen & Keypad

  Ref Docs:
  ILI9341 Screen: https://docs.wokwi.com/parts/wokwi-ili9341
  Keypad: https://docs.wokwi.com/parts/wokwi-membrane-keypad
  UNO r3: https://docs.wokwi.com/parts/wokwi-arduino-uno

 ****************************************************/



#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"
#include <Keypad.h>

// For the Adafruit shield, these are the default.
#define TFT_DC 9
#define TFT_CS 10

// Screen Defaults
#define DEFAULT_SCREEN_ROT 3
#define COLOUR_DARK 0x0020
#define COLOR_BRAND 0x2E4C

// Use hardware SPI (on Uno, #13, #12, #11) and the above for CS/DC
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);
//Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_MOSI, TFT_CLK, TFT_RST, TFT_MISO);

const byte KEYPAD_ROWS = 4;
const byte KEYPAD_COLS = 4;
byte rowPins[KEYPAD_ROWS] = {5, 4, 3, 2};
byte colPins[KEYPAD_COLS] = {A3, A2, A1, A0};
char keys[KEYPAD_ROWS][KEYPAD_COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};

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

uint64_t value = 0;

/**
 * Setup
 */
void setup() {
  
  Serial.begin(9600);
 
  tft.begin();

  // diagnostics from Screen
  uint8_t SCREEN_DIAGNOSTICS = tft.readcommand8(ILI9341_RDMODE);
  
  tft.fillScreen(COLOUR_DARK);
  tft.setRotation(DEFAULT_SCREEN_ROT);
  tft.setTextColor(COLOR_BRAND);
  tft.setTextSize(2);

  tft.setCursor((tft.width() / 2) - 90, (tft.height() / 2) - 3);
  tft.println("Nobile Technology.");

  delay(2000);

  tft.fillScreen(COLOUR_DARK);
  tft.setCursor((tft.width() / 2) - 80, (tft.height() / 2) - 3);
  tft.println("Enter Number");

}

int maxNumberSize = 8;
String openingMessage = "Enter Number";
char memory[] = "";
String ringingMessage = "Ringing...";
boolean isRinging = false;


/**
 * Loop
 */
void loop(void) {

  char key = keypad.getKey();

  if (key != NO_KEY) {
    tft.fillScreen(COLOUR_DARK);
    tft.setCursor((tft.width() / 2) - 80, (tft.height() / 2) - 3);
    tft.setTextSize(3);
    Serial.println(key);
    Serial.println(strlen(memory));
    memory += key;
    tft.println(memory);
  }

}