import random
import matplotlib.pyplot as plt

# Game parameters
coin_price = 100.0
price_sensitivity = 0.5  # How much the price reacts to user demand
volatility = 0.3         # Maximum % of price change due to randomness
price_history = [coin_price]

def save_graph():
    plt.clf()
    plt.plot(price_history, label="Coin Price")
    plt.title("Coin Price Over Time")
    plt.xlabel("Turn")
    plt.ylabel("Price")
    plt.legend()
    plt.grid(True)
    plt.savefig("coin_price.png")
    print("📊 Graph saved as 'coin_price.png'")

print("💰 Welcome to Crypto Kids! Simulating user input of 0 each round for testing purposes.\n")

# Run for 10 rounds
for turn in range(1, 21):
    print(f"\nTurn {turn} - Current Coin Price: {round(coin_price, 2)}")
    
    # Simulated user input: always 0
    trade_amount = 0
    print(f"Simulated input: {trade_amount}")

    buys = trade_amount if trade_amount > 0 else 0
    sells = -trade_amount if trade_amount < 0 else 0
    net_demand = buys - sells

    price_change_from_demand = net_demand * price_sensitivity
    random_factor = random.uniform(-volatility, volatility) * coin_price
    coin_price += price_change_from_demand + random_factor
    coin_price = max(1, coin_price)

    price_history.append(coin_price)
    save_graph()