#!/usr/bin/env python3
import requests
import sys

def brl_to_usd(amount_brl):
    url = f"https://api.exchangerate.host/convert?from=BRL&to=USD&amount={amount_brl}"
    try:
        response = requests.get(url, timeout=5)
        response.raise_for_status()
        data = response.json()
        usd = data["result"]
        print(f"R${amount_brl:.2f} BRL = ${usd:.2f} USD")
    except Exception as e:
        print(f"Error converting currency: {e}")
        sys.exit(1)

if __name__ == "__main__":
    if len(sys.argv) != 2:
        print("Usage: ./brl_to_usd.py <amount_in_brl>")
        sys.exit(1)

    try:
        amount = float(sys.argv[1])
        brl_to_usd(amount)
    except ValueError:
        print("Please provide a valid number.")
        sys.exit(1)