#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>
#include <LiquidCrystal.h>
#include <SPI.h>

#define TFT_CS    9
#define TFT_RST   8
#define TFT_DC    10
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);
#define WIDTH 320
#define HEIGHT 240

LiquidCrystal lcd(7, 6, 5, 4, 3, 2);

#define BUTTON1_PIN A1
#define BUTTON2_PIN A0

#define GREEN_LED_PIN A3
#define RED_LED_PIN A2

bool accessGranted = false;

void setup() {
  lcd.begin(16, 2);
  lcd.print("PLace Your");
  lcd.setCursor(0, 1);
  lcd.print("Finger...");

  pinMode(BUTTON1_PIN, INPUT_PULLUP);
  pinMode(BUTTON2_PIN, INPUT_PULLUP);

  pinMode(GREEN_LED_PIN, OUTPUT);
  pinMode(RED_LED_PIN, OUTPUT);

  tft.begin();
  tft.setRotation(1);
  tft.fillScreen(ILI9341_BLACK);
}

void loop() {
  if (digitalRead(BUTTON1_PIN) == LOW) {
    registerFingerprint();
  }

  if (digitalRead(BUTTON2_PIN) == LOW) {
    if (accessGranted) {
      accessGranted = false;
      lcd.clear();
      lcd.print("Your fingerprint");
      lcd.setCursor(0, 1);
      lcd.print("is being checked..");
      delay(2000);
      digitalWrite(RED_LED_PIN, HIGH);
      lcd.clear();
      lcd.print("Access denied");
      drawLockIcon();
      delay(3000);
      digitalWrite(RED_LED_PIN, LOW);
      lcd.clear();
      lcd.print("Place your finger...");
    } else {
      verifyFingerprint();
    }
  }
}

void registerFingerprint() {
  lcd.clear();
  lcd.print("Fingerprint");
  lcd.setCursor(0, 1);
  lcd.print("registration");
  delay(2000);

  lcd.clear();
  lcd.print("Please Add");
  lcd.setCursor(0, 1);
  lcd.print("your fingerprint..");
  delay(2000);

  lcd.clear();
  lcd.print("Place same");
  lcd.setCursor(0, 1);
  lcd.print("finger again");
  delay(2000);

  lcd.clear();
  lcd.print("Registration");
  lcd.setCursor(0, 1);
  lcd.print("completed");
  delay(2000);

  lcd.clear();
  lcd.print("Place your finger");
}

void verifyFingerprint() {
  lcd.clear();
  lcd.print("Place your");
  lcd.setCursor(0, 1);
  lcd.print("fingerprint..");
  delay(2000);

  bool fingerprintMatch = true;

  if (fingerprintMatch) {
    lcd.clear();
    lcd.print("Your fingerprint");
    lcd.setCursor(0, 1);
    lcd.print("is being checked..");
    delay(2000);

    digitalWrite(GREEN_LED_PIN, HIGH);
    lcd.clear();
    lcd.print("Access granted");
    delay(1500);
    digitalWrite(GREEN_LED_PIN, LOW);
    displayPatternOnTFT();
    accessGranted = true;
    lcd.clear();
    lcd.print("Welcome Mr.Baris");
    delay(2000);
  } else {
    lcd.clear();
    lcd.print("Access denied");
    drawLockIcon();
    digitalWrite(RED_LED_PIN, HIGH);
    delay(3000);
    digitalWrite(RED_LED_PIN, LOW);
    lcd.clear();
    lcd.print("Place your finger");
  }
}

void displayPatternOnTFT() {
  for (int y = 0; y < HEIGHT; y++) {
    for (int x = 0; x < WIDTH; x++) {
      tft.drawPixel(x, y, x * y);
    }
  }
}

void drawLockIcon() {
  tft.fillScreen(ILI9341_BLACK);

  tft.drawCircle(160, 120, 40, ILI9341_WHITE);
  tft.drawCircle(160, 120, 30, ILI9341_WHITE);
  tft.drawCircle(160, 120, 20, ILI9341_WHITE);

  tft.drawLine(130, 90, 190, 150, ILI9341_RED);
  tft.drawLine(190, 90, 130, 150, ILI9341_RED);
}