from typing import Optional

from db.db import get_recent_buys_for_ticker
import config


def detect_cluster(ticker: str, as_of_date: Optional[str] = None) -> dict:
    buys = get_recent_buys_for_ticker(ticker, config.CLUSTER_WINDOW_DAYS, as_of_date=as_of_date)
    unique_insiders = {b["insider_name"] for b in buys}
    total_value = sum(b["total_value"] or 0 for b in buys)
    return {
        "cluster_size": len(unique_insiders),
        "total_cluster_value": total_value,
        "buys": buys,
    }