import time
import random
from datetime import datetime
import uuid


def generate_id() -> str:
    """Generate a time-sortable unique ID (simplified ULID-style)."""
    timestamp = int(time.time() * 1000)
    randomness = random.randint(0, 0xFFFFFF)
    return f"{timestamp:013x}{randomness:06x}"


def generate_order_no() -> str:
    """Generate a human-readable order number with yyyymmddhhmmss format."""
    # 格式化为 yyyymmddhhmmss 格式的时间戳
    now = datetime.now()
    timestamp = now.strftime("%Y%m%d%H%M%S")
    # 使用 UUID 的部分值来生成更可靠的随机数，防止并发冲突
    random_part = uuid.uuid4().hex[:8].upper()
    return f"MZZC{timestamp}{random_part}"