Bob/pseudo_oop_examples.bob

// Pseudo-OOP Examples using Dictionaries
print("=== PSEUDO-OOP EXAMPLES ===");

// Example 1: Simple Person Object
print("\n--- Example 1: Person Object ---");
func createPerson(name, age) {
    var person = {
        "name": name,
        "age": age
    };
    
    person["greet"] = func() {
        return "Hello, I'm " + person["name"] + " and I'm " + person["age"] + " years old.";
    };
    
    person["haveBirthday"] = func() {
        person["age"] = person["age"] + 1;
        return person["name"] + " is now " + person["age"] + " years old!";
    };
    
    return person;
}

var alice = createPerson("Alice", 25);
var bob = createPerson("Bob", 30);

print(alice["greet"]());
print(bob["greet"]());
print(alice["haveBirthday"]());
print(alice["greet"]());

// Example 2: Bank Account with Encapsulation
print("\n--- Example 2: Bank Account ---");
func createBankAccount(accountNumber, initialBalance) {
    var account = {
        "accountNumber": accountNumber,
        "balance": initialBalance,
        "transactions": []
    };
    
    account["addTransaction"] = func(type, amount) {
        push(account["transactions"], {
            "type": type,
            "amount": amount,
            "balance": account["balance"],
            "timestamp": time()
        });
    };
    
    account["deposit"] = func(amount) {
        if (amount > 0) {
            account["balance"] = account["balance"] + amount;
            account["addTransaction"]("deposit", amount);
            return "Deposited " + amount + ". New balance: " + account["balance"];
        } else {
            return "Invalid deposit amount";
        }
    };
    
    account["withdraw"] = func(amount) {
        if (amount > 0 && amount <= account["balance"]) {
            account["balance"] = account["balance"] - amount;
            account["addTransaction"]("withdrawal", amount);
            return "Withdrew " + amount + ". New balance: " + account["balance"];
        } else {
            return "Invalid withdrawal amount or insufficient funds";
        }
    };
    
    account["getStatement"] = func() {
        var statement = "Account: " + account["accountNumber"] + "\n";
        statement = statement + "Balance: " + account["balance"] + "\n";
        statement = statement + "Transactions:\n";
        
        for (var i = 0; i < len(account["transactions"]); i++) {
            var tx = account["transactions"][i];
            statement = statement + "  " + tx["type"] + ": " + tx["amount"] + " (balance: " + tx["balance"] + ")\n";
        }
        return statement;
    };
    
    return account;
}

var account1 = createBankAccount("12345", 1000);
print(account1["deposit"](500));
print(account1["withdraw"](200));
print(account1["withdraw"](50));
print(account1["getStatement"]());

// Example 3: Game Character with Inheritance-like Pattern
print("\n--- Example 3: Game Character System ---");
func createCharacter(name, health, attack) {
    var character = {
        "name": name,
        "health": health,
        "maxHealth": health,
        "attack": attack,
        "level": 1,
        "experience": 0,
        "inventory": []
    };
    
    character["takeDamage"] = func(damage) {
        character["health"] = character["health"] - damage;
        if (character["health"] < 0) {
            character["health"] = 0;
        }
        return character["name"] + " took " + damage + " damage. Health: " + character["health"] + "/" + character["maxHealth"];
    };
    
    character["heal"] = func(amount) {
        var oldHealth = character["health"];
        character["health"] = character["health"] + amount;
        if (character["health"] > character["maxHealth"]) {
            character["health"] = character["maxHealth"];
        }
        var healed = character["health"] - oldHealth;
        return character["name"] + " healed " + healed + " health. Health: " + character["health"] + "/" + character["maxHealth"];
    };
    
    character["gainExperience"] = func(exp) {
        character["experience"] = character["experience"] + exp;
        var levelUp = false;
        while (character["experience"] >= character["level"] * 100) {
            character["experience"] = character["experience"] - (character["level"] * 100);
            character["level"] = character["level"] + 1;
            character["maxHealth"] = character["maxHealth"] + 10;
            character["health"] = character["maxHealth"]; // Full heal on level up
            character["attack"] = character["attack"] + 2;
            levelUp = true;
        }
        if (levelUp) {
            return character["name"] + " leveled up to " + character["level"] + "!";
        } else {
            return character["name"] + " gained " + exp + " experience.";
        }
    };
    
    character["addItem"] = func(item) {
        push(character["inventory"], item);
        return character["name"] + " picked up " + item["name"];
    };
    
    character["getStatus"] = func() {
        return character["name"] + " (Lv." + character["level"] + ") - HP: " + character["health"] + "/" + character["maxHealth"] + 
               " ATK: " + character["attack"] + " EXP: " + character["experience"] + "/" + (character["level"] * 100);
    };
    
    return character;
}

func createWarrior(name) {
    var warrior = createCharacter(name, 120, 15);
    warrior["class"] = "Warrior";
    warrior["specialAbility"] = func() {
        return warrior["name"] + " uses Battle Cry! Attack increased!";
    };
    return warrior;
}

func createMage(name) {
    var mage = createCharacter(name, 80, 8);
    mage["class"] = "Mage";
    mage["mana"] = 100;
    mage["maxMana"] = 100;
    mage["castSpell"] = func(spellName, manaCost) {
        if (mage["mana"] >= manaCost) {
            mage["mana"] = mage["mana"] - manaCost;
            return mage["name"] + " casts " + spellName + "! Mana: " + mage["mana"] + "/" + mage["maxMana"];
        } else {
            return mage["name"] + " doesn't have enough mana!";
        }
    };
    return mage;
}

var hero = createWarrior("Hero");
var wizard = createMage("Wizard");

print(hero["getStatus"]());
print(wizard["getStatus"]());

print(hero["takeDamage"](20));
print(hero["gainExperience"](150));
print(hero["getStatus"]());

print(wizard["castSpell"]("Fireball", 30));
print(wizard["castSpell"]("Lightning", 50));
print(wizard["getStatus"]());

// Example 4: Simple Game Engine
print("\n--- Example 4: Simple Game Engine ---");
func createGameEngine() {
    var engine = {
        "entities": [],
        "time": 0
    };
    
    engine["addEntity"] = func(entity) {
        push(engine["entities"], entity);
        return "Added " + entity["name"] + " to the game";
    };
    
    engine["removeEntity"] = func(entityName) {
        for (var i = 0; i < len(engine["entities"]); i++) {
            if (engine["entities"][i]["name"] == entityName) {
                // Remove by shifting elements (simple implementation)
                for (var j = i; j < len(engine["entities"]) - 1; j++) {
                    engine["entities"][j] = engine["entities"][j + 1];
                }
                engine["entities"][len(engine["entities"]) - 1] = none;
                return "Removed " + entityName + " from the game";
            }
        }
        return "Entity " + entityName + " not found";
    };
    
    engine["update"] = func() {
        engine["time"] = engine["time"] + 1;
        var updates = [];
        for (var i = 0; i < len(engine["entities"]); i++) {
            var entity = engine["entities"][i];
            if (has(entity, "update")) {
                push(updates, entity["update"]());
            }
        }
        return "Game updated. Time: " + engine["time"] + ". Updates: " + len(updates);
    };
    
    engine["getEntityCount"] = func() {
        return len(engine["entities"]);
    };
    
    return engine;
}

func createNPC(name, behavior) {
    var npc = {
        "name": name,
        "behavior": behavior,
        "position": {"x": 0, "y": 0}
    };
    
    npc["update"] = func() {
        if (npc["behavior"] == "wander") {
            npc["position"]["x"] = npc["position"]["x"] + (random() * 2 - 1);
            npc["position"]["y"] = npc["position"]["y"] + (random() * 2 - 1);
            return npc["name"] + " wandered to (" + npc["position"]["x"] + ", " + npc["position"]["y"] + ")";
        } else if (npc["behavior"] == "patrol") {
            npc["position"]["x"] = npc["position"]["x"] + 1;
            if (npc["position"]["x"] > 10) {
                npc["position"]["x"] = 0;
            }
            return npc["name"] + " patrolled to (" + npc["position"]["x"] + ", " + npc["position"]["y"] + ")";
        }
        return npc["name"] + " did nothing";
    };
    
    return npc;
}

var game = createGameEngine();
var guard = createNPC("Guard", "patrol");
var merchant = createNPC("Merchant", "wander");

print(game["addEntity"](guard));
print(game["addEntity"](merchant));
print("Entity count: " + game["getEntityCount"]());

for (var i = 0; i < 3; i++) {
    print(game["update"]());
}

// Example 5: Event System
print("\n--- Example 5: Event System ---");
func createEventSystem() {
    var eventSystem = {
        "listeners": {}
    };
    
    eventSystem["on"] = func(event, callback) {
        if (!has(eventSystem["listeners"], event)) {
            eventSystem["listeners"][event] = [];
        }
        push(eventSystem["listeners"][event], callback);
        return "Added listener for " + event;
    };
    
    eventSystem["emit"] = func(event, data) {
        if (has(eventSystem["listeners"], event)) {
            var results = [];
            for (var i = 0; i < len(eventSystem["listeners"][event]); i++) {
                var result = eventSystem["listeners"][event][i](data);
                push(results, result);
            }
            return "Emitted " + event + " to " + len(results) + " listeners";
        } else {
            return "No listeners for " + event;
        }
    };
    
    eventSystem["removeListener"] = func(event, callback) {
        if (has(eventSystem["listeners"], event)) {
            for (var i = 0; i < len(eventSystem["listeners"][event]); i++) {
                if (eventSystem["listeners"][event][i] == callback) {
                    // Remove by shifting elements
                    for (var j = i; j < len(eventSystem["listeners"][event]) - 1; j++) {
                        eventSystem["listeners"][event][j] = eventSystem["listeners"][event][j + 1];
                    }
                    eventSystem["listeners"][event][len(eventSystem["listeners"][event]) - 1] = none;
                    return "Removed listener for " + event;
                }
            }
        }
        return "Listener not found for " + event;
    };
    
    return eventSystem;
}

var events = createEventSystem();

func logEvent(data) {
    return "Logger: " + data;
}

func alertEvent(data) {
    return "Alert: " + data + " happened!";
}

events["on"]("user_login", logEvent);
events["on"]("user_login", alertEvent);
events["on"]("error", logEvent);

print(events["emit"]("user_login", "Alice logged in"));
print(events["emit"]("error", "Database connection failed"));

print("\n=== ALL PSEUDO-OOP EXAMPLES COMPLETED ===");