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

#define BTN_PIN 5
#define TFT_DC 2
#define TFT2_DC 32
#define TFT_CS 15
#define TFT2_CS 33
#define BTN1_PIN 25
#define BTN2_PIN 26
#define BTN3_PIN 27

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);
Adafruit_ILI9341 tft2 = Adafruit_ILI9341(TFT2_CS, TFT2_DC);

bool isOccupied = false;
uint16_t occupiedBgColor = ILI9341_BLACK;

void setup() {
  Serial.begin(115200);

  pinMode(BTN_PIN, INPUT_PULLUP);
  pinMode(BTN1_PIN, INPUT_PULLUP);
  pinMode(BTN2_PIN, INPUT_PULLUP);
  pinMode(BTN3_PIN, INPUT_PULLUP);

  tft.begin();
  tft.setRotation(1); 
  tft.fillScreen(ILI9341_BLACK);
  tft2.begin();
  tft2.setRotation(1); 
  tft2.fillScreen(ILI9341_BLACK);

  drawSign();
}

void loop() {
  if (digitalRead(BTN_PIN) == LOW) {
    delay(50); // Debounce delay
    if (digitalRead(BTN_PIN) == LOW) {
      isOccupied = !isOccupied;
      drawSign();
      while (digitalRead(BTN_PIN) == LOW) {
        delay(50); // Wait for button release
      }
    }
  }

  if (digitalRead(BTN1_PIN) == LOW) {
    delay(50); // Debounce delay
    if (digitalRead(BTN1_PIN) == LOW) {
      occupiedBgColor = ILI9341_PINK; // 핑크색 배경 설정
      drawSign();
      while (digitalRead(BTN1_PIN) == LOW) {
        delay(50); // Wait for button release
      }
    }
  }

  if (digitalRead(BTN2_PIN) == LOW) {
    delay(50); // Debounce delay
    if (digitalRead(BTN2_PIN) == LOW) {
      occupiedBgColor = ILI9341_BLUE; // 파랑색 배경 설정
      drawSign();
      while (digitalRead(BTN2_PIN) == LOW) {
        delay(50); // Wait for button release
      }
    }
  }

  if (digitalRead(BTN3_PIN) == LOW) {
    delay(50); // Debounce delay
    if (digitalRead(BTN3_PIN) == LOW) {
      occupiedBgColor = ILI9341_PURPLE; // 보라색 배경 설정
      drawSign();
      while (digitalRead(BTN3_PIN) == LOW) {
        delay(50); // Wait for button release
      }
    }
  }
}

void drawSign() {
  if (isOccupied) {
    tft.fillScreen(occupiedBgColor); // Occupied 상태일 때 배경 색상 변경
    tft.setTextColor(ILI9341_WHITE);
    delay(10);
    tft2.fillScreen(occupiedBgColor); // Occupied 상태일 때 배경 색상 변경
    tft2.setTextColor(ILI9341_WHITE);
  } else {
    tft.fillScreen(ILI9341_BLACK); // Vacant 상태일 때 배경을 검정색으로 설정
    tft.setTextColor(ILI9341_GREEN);
    tft2.fillScreen(ILI9341_BLACK); // Occupied 상태일 때 배경 색상 변경
    tft2.setTextColor(ILI9341_WHITE);
    occupiedBgColor = ILI9341_BLACK;
  }

  tft.setTextSize(4);
  tft.setCursor(40, 100);
  tft2.setTextSize(4);
  tft2.setCursor(40, 100);

  if (isOccupied) {
    tft.print("Occupied");
    tft2.print("Sign");
  } else {
    tft.print("Vacant");
    tft2.print("WHY");
  }
}