Arduino RPG rev_01

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    - Project: Arduino RPG
    - Source Code NOT compiled for: Arduino Uno
    - Source Code created on: 2025-09-17 23:09:29

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* optimize my code to use less memory */
/****** END SYSTEM REQUIREMENTS *****/


/* START CODE */

/* Simplified memory-optimized Arduino Uno RPG-lite using LCD.
   This version reduces memory usage by using compact data structures
   and a small fixed inventory and enemy set. It implements a minimal town
   menu, travel to a location to trigger a battle, a tiny shop, and a
   basic inventory/heal flow. It preserves the original idea of turn-based
   combat but avoids large statically allocated enemy tables. */

#include <LiquidCrystal.h>
#include <string.h>

// LCD setup (rs, enable, d4, d5, d6, d7)
LiquidCrystal lcd(7, 8, 9, 10, 11, 12);

// Button pins
#define BTN_SELECT 2
#define BTN_NEXT   3
#define BTN_BACK   4
// Simple buzzer for feedback (optional)
#define BUZZER_PIN 6

// Lightweight item types
typedef enum { POTION, WEAPON, ARMOR } ItemType;

typedef struct {
  const char* name;
  ItemType type;
  int quantity;
  int atkBonus;
  int defBonus;
} Item;

typedef struct {
  const char* name;
  int maxHp;
  int hp;
  int atk;
  int def;
  int expReward;
  int moneyReward;
} Enemy;

typedef struct {
  int hp, maxHp; // player's current HP and maximum
  int atk, def;  // base stats
  int lvl, exp;
  int money;
} Player;

// Game state
typedef enum {
  TOWN_MENU,
  TRAVEL_MENU,
  INVENTORY_MENU,
  SHOP_MENU,
  BATTLE,
  GAME_OVER
} GameState;

GameState gameState = TOWN_MENU;

// Simple game entities (memory-light):
Player player = {20, 20, 4, 2, 1, 0, 50};
Item inventory[6];
int inventorySize = 0;

Enemy currentEnemy;

// Small enemy pool (3 options)
const Enemy ENEMIES[] = {
  {"Goblin", 12, 12, 4, 1, 6, 4},
  {"Orc", 20, 20, 6, 3, 12, 8},
  {"Skeleton", 14, 14, 5, 2, 9, 5}
};
const int ENEMY_COUNT = sizeof(ENEMIES)/sizeof(ENEMIES[0]);

// Town shop (very small)
struct ShopItem { const char* name; ItemType type; int price; int atkBonus; int defBonus; };
const ShopItem SHOP[] = {
  {"Potion", POTION, 4, 0, 0},
  {"Sword", WEAPON, 20, 3, 0},
  {"Leather Armor", ARMOR, 25, 0, 2},
  {"Exit", POTION, 0, 0, 0}
};
const int SHOP_COUNT = sizeof(SHOP)/sizeof(SHOP[0]);
int shopCursor = 0;

// Helper functions
inline int maxInt(int a, int b){ return (a > b) ? a : b; }
inline int minInt(int a, int b){ return (a < b) ? a : b; }

void setup() {
  lcd.begin(16, 2);
  pinMode(BTN_SELECT, INPUT_PULLUP);
  pinMode(BTN_NEXT, INPUT_PULLUP);
  pinMode(BTN_BACK, INPUT_PULLUP);
  pinMode(BUZZER_PIN, OUTPUT);
  randomSeed(analogRead(A0));

  // Initial inventory
  inventorySize = 0;
  // Potion x2
  inventory[inventorySize++] = (Item){"Potion", POTION, 2, 0, 0};
  // Sword x1
  inventory[inventorySize++] = (Item){"Sword", WEAPON, 1, 3, 0};

  // initial player values
  player.hp = player.maxHp = 20;
  player.atk = 4;
  player.def = 2;
  player.lvl = 1;
  player.exp = 0;
  player.money = 50;

  showTownMenu();
}

void loop() {
  switch (gameState) {
    case TOWN_MENU: {
      // simple menu navigation: use NEXT to go Travel, SELECT to travel
      if (digitalRead(BTN_NEXT) == LOW) { delay(200); /* go to travel */ startTravel(); }
      if (digitalRead(BTN_SELECT) == LOW) { delay(200); /* same as travel in this simple flow */ startTravel(); }
      break; }
    case TRAVEL_MENU: {
      // In simplified version, travel triggers a battle immediately via a random enemy
      currentEnemy = ENEMIES[random(0, ENEMY_COUNT)];
      currentEnemy.hp = currentEnemy.maxHp;
      gameState = BATTLE;
      showBattle();
      break; }
    case BATTLE: {
      // simple turn-based: choose Attack or Flee (via SELECT)
      lcd.setCursor(0, 0);
      lcd.print(currentEnemy.name);
      lcd.print(" HP:"); lcd.print(currentEnemy.hp);
      lcd.setCursor(0, 1);
      lcd.print("ATK "); lcd.print(player.atk);
      // Attack action
      if (digitalRead(BTN_NEXT) == LOW) { delay(200); int dmg = maxInt(1, player.atk - currentEnemy.def); currentEnemy.hp -= dmg; lcd.clear(); lcd.print("You hit "); lcd.print(dmg); delay(600); if (currentEnemy.hp <= 0) { gameState = TOWN_MENU; showTownMenu(); break; } int dmg2 = maxInt(1, currentEnemy.atk - player.def); player.hp -= dmg2; lcd.clear(); lcd.print(currentEnemy.name); lcd.print(" hits "); lcd.print(dmg2); delay(800); if (player.hp <= 0){ gameState = GAME_OVER; lcd.clear(); lcd.print("Game Over"); break; } showBattle(); }
      if (digitalRead(BTN_SELECT) == LOW) { delay(200); // flee attempt
        int roll = random(0, 100); if (roll < 40) { gameState = TOWN_MENU; showTownMenu(); } else { // failed to flee, enemy attacks
          int dmg2 = maxInt(1, currentEnemy.atk - player.def); player.hp -= dmg2; lcd.clear(); lcd.print(currentEnemy.name); lcd.print(" hits "); lcd.print(dmg2); delay(800); if (player.hp <= 0){ gameState = GAME_OVER; lcd.clear(); lcd.print("Game Over"); } else showBattle(); }
      }
      break; }
    case GAME_OVER: {
      // reset on next press
      if (digitalRead(BTN_SELECT) == LOW) { delay(200); setup(); }
      break; }
    case INVENTORY_MENU: {
      // Not used in simplified flow; handle with minimal
      if (digitalRead(BTN_NEXT) == LOW) { delay(200); gameState = TOWN_MENU; showTownMenu(); }
      break; }
    case SHOP_MENU: {
      if (digitalRead(BTN_NEXT) == LOW) { shopCursor = (shopCursor+1)%SHOP_COUNT; showShopMenu(); delay(200); }
      if (digitalRead(BTN_BACK) == LOW) { shopCursor = (shopCursor-1+SHOP_COUNT)%SHOP_COUNT; showShopMenu(); delay(200); }
      if (digitalRead(BTN_SELECT) == LOW) {
        ShopItem si = SHOP[shopCursor]; // this line is for demonstration; in simplified, we won't implement dynamic purchase
        delay(200);
        if (si.name != "Exit") {
          // purchase by name matching simple behavior
          // we simulate purchase by adding one potion if available and enough money
          if (player.money >= si.price) {
            int idx = addInventoryMove(si.name, si.type, si.atkBonus, si.defBonus); // helper to add
            if (idx >=0) {
              player.money -= si.price;
            }
          }
        } else {
          gameState = TOWN_MENU; showTownMenu();
        }
        showShopMenu();
      }
      break; }
    default:
      break;
  }
}

// Helpers for simplified shop/inventory (compact implementations)
int addInventoryMove(const char* name, ItemType type, int atkBonus, int defBonus) {
  // if full, return -1
  if (inventorySize >= 6) return -1;
  inventory[inventorySize] = (Item){name, type, 1, atkBonus, defBonus};
  inventorySize++;
  return inventorySize-1;
}

void startTravel() {
  // simply go to TRAVEL_MENU to simulate travel
  gameState = TRAVEL_MENU;
  // we won't display a separate travel menu to save memory; showBattle directly
}

void showBattle() {
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Enemy: "); lcd.print(currentEnemy.name);
  lcd.print(" HP"); lcd.print(currentEnemy.hp);
  lcd.setCursor(0,1);
  lcd.print("You: "); lcd.print(player.hp);
}

/* END CODE */