import yfinance as yf
from datetime import datetime, timedelta
import pandas as pd

def stock_data(tick):
    try:
        # Auto suffix untuk saham Indonesia
        if tick.isalpha() and len(tick) <= 4:
            tick = tick.upper() + ".JK"
        else:
            tick = tick.upper()

        df = yf.download(
            tick,
            start=datetime.now() - timedelta(days=365),
            end=datetime.now(),
            progress=False,
            threads=False,
            auto_adjust=False
        )

        # Validasi data
        if df.empty or "Close" not in df.columns:
            return pd.DataFrame()

        df = df[["Close"]].dropna()
        return df

    except Exception as e:
        print(f"[ERROR] Failed to fetch {tick} → {e}")
        return pd.DataFrame()