Gacha Pet Legendaris

#include <Arduino.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define OLED_SDA 21
#define OLED_SCL 22
#define BUTTON_UP 32
#define BUTTON_DOWN 33
#define BUTTON_SELECT 27

constexpr int SCREEN_WIDTH = 128;
constexpr int SCREEN_HEIGHT = 64;
constexpr uint8_t OLED_ADDRESS = 0x3C;
constexpr unsigned long DEBOUNCE_MS = 180;
constexpr unsigned long DECAY_INTERVAL_MS = 60000;

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

enum PetType { DRAGON, PHOENIX, UNICORN };
const char *petNames[] = {"Naga", "Phoenix", "Unicorn"};
const char *menuItems[] = {"Rawat", "Gacha", "Petualangan", "Status"};

PetType pet = DRAGON;
uint8_t petLevel = 1;
int hunger = 65;
int happiness = 65;
int energy = 75;
int coins = 100;
uint8_t menuIndex = 0;
bool messageMode = false;
String messageLine1;
String messageLine2;
unsigned long messageUntil = 0;
unsigned long lastInput = 0;
unsigned long lastDecay = 0;

bool pressed(uint8_t pin) {
  if (digitalRead(pin) == LOW && millis() - lastInput >= DEBOUNCE_MS) {
    lastInput = millis();
    return true;
  }
  return false;
}

void clampStats() {
  hunger = constrain(hunger, 0, 100);
  happiness = constrain(happiness, 0, 100);
  energy = constrain(energy, 0, 100);
}

void showMessage(const String &line1, const String &line2) {
  messageMode = true;
  messageLine1 = line1;
  messageLine2 = line2;
  messageUntil = millis() + 1800;
}

void drawBar(int y, const char *label, int value) {
  display.setCursor(0, y);
  display.print(label);
  display.drawRect(31, y, 70, 7, SSD1306_WHITE);
  int width = map(value, 0, 100, 0, 68);
  if (width > 0) display.fillRect(32, y + 1, width, 5, SSD1306_WHITE);
  display.setCursor(105, y);
  display.print(value);
}

void drawPetIcon() {
  display.setTextSize(2);
  display.setCursor(94, 0);
  if (pet == DRAGON) display.print("D");
  if (pet == PHOENIX) display.print("P");
  if (pet == UNICORN) display.print("U");
  display.setTextSize(1);
}

void render() {
  display.clearDisplay();
  display.setTextColor(SSD1306_WHITE);

  if (messageMode) {
    display.setTextSize(1);
    display.setCursor(4, 15);
    display.println(messageLine1);
    display.setCursor(4, 32);
    display.println(messageLine2);
    display.setCursor(4, 51);
    display.print("Koin: ");
    display.print(coins);
    display.display();
    return;
  }

  display.setTextSize(1);
  display.setCursor(0, 0);
  display.print(petNames[pet]);
  display.print(" Lv.");
  display.print(petLevel);
  drawPetIcon();
  drawBar(13, "Lapar", hunger);
  drawBar(23, "Senang", happiness);
  drawBar(33, "Energi", energy);

  display.setCursor(0, 45);
  display.print("Koin: ");
  display.print(coins);
  for (uint8_t i = 0; i < 4; ++i) {
    display.setCursor(i * 31, 55);
    if (i == menuIndex) display.print(">"); else display.print(" ");
    display.print(menuItems[i][0]);
  }
  display.display();
}

void feedPet() {
  if (coins < 5) {
    showMessage("Koin tidak cukup", "Butuh 5 koin");
    return;
  }
  coins -= 5;
  hunger += 24;
  happiness += 8;
  clampStats();
  showMessage("Peliharaan makan!", "+lapar +senang");
}

void doGacha() {
  if (coins < 30) {
    showMessage("Koin tidak cukup", "Gacha butuh 30");
    return;
  }
  coins -= 30;
  int roll = random(100);
  if (roll < 10) {
    pet = PHOENIX;
    petLevel++;
    showMessage("LEGENDARIS!", "Phoenix menetas");
  } else if (roll < 25) {
    pet = UNICORN;
    petLevel++;
    showMessage("Sangat langka!", "Unicorn menetas");
  } else if (roll < 50) {
    pet = DRAGON;
    petLevel++;
    showMessage("Langka!", "Naga menetas");
  } else {
    coins += 12;
    showMessage("Dapat 12 koin", "Coba lagi nanti");
  }
}

void adventure() {
  if (energy < 25 || hunger < 15) {
    showMessage("Belum siap jalan", "Beri makan/istirahat");
    return;
  }
  energy -= 25;
  hunger -= 15;
  int reward = random(8, 31);
  coins += reward;
  happiness += 12;
  if (random(100) < 30) petLevel++;
  clampStats();
  showMessage("Petualangan selesai!", "+" + String(reward) + " koin");
}

void showStatus() {
  String line = String(petNames[pet]) + " Lv." + String(petLevel);
  showMessage(line, "Rawat agar kuat!");
}

void selectMenu() {
  if (menuIndex == 0) feedPet();
  else if (menuIndex == 1) doGacha();
  else if (menuIndex == 2) adventure();
  else showStatus();
}

void setup() {
  pinMode(BUTTON_UP, INPUT_PULLUP);
  pinMode(BUTTON_DOWN, INPUT_PULLUP);
  pinMode(BUTTON_SELECT, INPUT_PULLUP);
  Wire.begin(OLED_SDA, OLED_SCL);
  display.begin(SSD1306_SWITCHCAPVCC, OLED_ADDRESS);
  randomSeed(esp_random());
  showMessage("Pocket Pet siap!", "Pilih menu");
  render();
}

void loop() {
  bool redraw = false;
  if (messageMode && millis() >= messageUntil) {
    messageMode = false;
    redraw = true;
  }

  if (!messageMode) {
    if (pressed(BUTTON_UP)) {
      menuIndex = (menuIndex + 3) % 4;
      redraw = true;
    }
    if (pressed(BUTTON_DOWN)) {
      menuIndex = (menuIndex + 1) % 4;
      redraw = true;
    }
    if (pressed(BUTTON_SELECT)) {
      selectMenu();
      redraw = true;
    }
  }

  if (millis() - lastDecay >= DECAY_INTERVAL_MS) {
    lastDecay = millis();
    hunger -= 2;
    happiness -= 1;
    energy += 3;
    clampStats();
    redraw = true;
  }

  if (redraw) render();
}