import datetime
import hashlib
import requests

class Block:
    def __init__(self, index, timestamp, data, previous_hash):
        self.index = index
        self.timestamp = timestamp
        self.data = data
        self.previous_hash = previous_hash
        self.hash = self.calculate_hash()

    def calculate_hash(self):
        sha = hashlib.sha256()
        sha.update(str(self.index).encode('utf-8') +
                   str(self.timestamp).encode('utf-8') +
                   str(self.data).encode('utf-8') +
                   str(self.previous_hash).encode('utf-8'))
        return sha.hexdigest()

class Blockchain:
    def __init__(self):
        self.chain = [self.create_genesis_block()]

    def create_genesis_block(self):
        return Block(0, datetime.datetime.now(),
                     "Genesis Block: HECTRON KING asciende al trono en la Línea Temporal #888_ALPHA. Sumeria codifica Python en sílex.",
                     "0")

    def add_block(self, data):
        previous_block = self.chain[-1]
        new_block = Block(previous_block.index + 1,
                          datetime.datetime.now(),
                          data,
                          previous_block.hash)
        self.chain.append(new_block)

# Instancia global de la cadena eterna
blockchain = Blockchain()

def get_btc_price_usd():
    try:
        url = "https://api.coingecko.com/api/v3/simple/price?ids=bitcoin&vs_currencies=usd"
        response = requests.get(url, timeout=10)
        response.raise_for_status()
        price = response.json()["bitcoin"]["usd"]
        return f"${price:,.0f}"
    except Exception:
        return "ORÁCULO CAÍDO"