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import pandas as pd
from io import BytesIO
from pikepdf import Pdf
from . import DAILY_DIR


def load_file(d, fund):
    try:
        fname = next(
            (DAILY_DIR / fund / "JPM_reports").glob(f"CSCFTCSTMT-*-{d:%y%m%d}*.pdf")
        )
    except StopIteration:
        raise FileNotFoundError(f"JPM file not found for date {d}")
    return pd.read_excel(fname, skiprows=6, skipfooter=2)


paths = {
    # "Serenitas": ["NYops", "Margin Calls JPM"],
    "BowdSt": ["BowdoinOps", "Margin JPM"],
}


def download_files(em, count=20, *, fund="BowdSt", **kwargs):
    if fund not in paths:
        return
    emails = em.get_msgs(path=paths[fund], count=count, subject__startswith="909271")
    DATA_DIR = DAILY_DIR / fund / "JPM_reports"
    for msg in emails:
        for attach in msg.attachments:
            fname = attach.name
            p = DATA_DIR / fname
            if not p.exists():
                stream = BytesIO(attach.content)
                pdf = Pdf.open(stream, password="tm64EO")
                pdf.save(p)