#!/usr/bin/env python3
"""Send last month's receipts to Paperless.tax."""

import argparse
import datetime
import email
import email.message
import mimetypes
import pathlib
import smtplib
import zipfile

import dateutil.relativedelta  # pylint: disable=import-error
import passhole.passhole  # pylint: disable=import-error

KEEPASS_DB = pathlib.Path("~/Documents/Database.kdbx").expanduser()
SMTP_HOST = "smtp.shore.co.il"


if __name__ == "__main__":
    arg_parser = argparse.ArgumentParser(description=__doc__)
    arg_parser.add_argument(
        "zip_file",
        help="Path to the zip file with the receipts.",
        type=pathlib.Path,
    )
    args = arg_parser.parse_args()

    # Get passwords from the Keepass database.
    db = passhole.passhole.open_database(database=KEEPASS_DB)
    entry = db.find_entries_by_title("Paperless")[0]
    paperless_address = entry.get_custom_property("Direct email address")
    entry = db.find_entries_by_title(
        "LDAP", group=db.find_groups_by_name("shore.co.il")[0]
    )[0]
    smtp_username = entry.username
    smtp_password = entry.password

    # What month these receipts belong to?
    now = datetime.datetime.now()
    last_month = now + dateutil.relativedelta.relativedelta(months=-1)

    # Build the email message.
    msg = email.message.EmailMessage()
    msg["Subject"] = last_month.strftime("%B %Y receipts")
    msg["From"] = "nimrod@shore.co.il"
    msg["To"] = paperless_address

    # Attach the receipts.
    with zipfile.ZipFile(args.zip_file) as zf:
        for receipt in zf.namelist():
            with zf.open(receipt) as attachment:
                maintype, subtype = mimetypes.guess_type(receipt)[0].split("/")
                msg.add_attachment(
                    attachment.read(),
                    maintype=maintype,
                    subtype=subtype,
                    filename=receipt,
                )

    # Send the message.
    with smtplib.SMTP(SMTP_HOST) as s:
        s.starttls()
        s.login(smtp_username, smtp_password)
        s.send_message(msg)