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from serenitas.utils.env import DAILY_DIR
from serenitas.utils.exchange import ExchangeMessage
import datetime
from collateral.baml_isda import download_from_secure_id
from bs4 import BeautifulSoup
from urllib.parse import urlsplit, parse_qs, urlunsplit
import logging
import argparse

from collateral.common import load_pdf
from pathlib import Path
import pandas as pd
from collections import defaultdict
import shutil

from interest_statement import export_data
from dateutil.relativedelta import relativedelta

logger = logging.getLogger(__name__)


def download_messages(em, counterparty, start, end, auto=False):
    for msg in em.get_msgs(
        20,
        path=["Interest", counterparty],
    ):
        if not auto:
            if counterparty == "CITI":
                base_dir = DAILY_DIR / f"{counterparty}_reports" / "Interest Statements"
            elif counterparty == "BAML":
                base_dir = (
                    DAILY_DIR / "Serenitas" / f"BoA_reports" / "Interest Statements"
                )
            else:
                base_dir = (
                    DAILY_DIR
                    / "Serenitas"
                    / f"{counterparty}_reports"
                    / "Interest Statements"
                )
        else:
            base_dir = (
                DAILY_DIR / "Serenitas" / "MonthlyInterest" / f"{counterparty}_reports"
            )
        if (msg.datetime_sent.date() >= datetime.date.fromisoformat(start)) and (
            msg.datetime_sent.date() <= datetime.date.fromisoformat(end)
        ):
            if counterparty == "BAML":
                soup = BeautifulSoup(msg.body, features="lxml")
                a = soup.find("a")
                url = urlsplit(a["href"])
                query = parse_qs(url.query)
                base_url = urlunsplit(url[:2] + ("",) * 3)
                try:
                    download_from_secure_id(
                        query["id"][0], query["brand"][0], base_dir, base_url
                    )
                except ValueError as e:
                    logging.error(e)
                    continue
                continue
            for attach in msg.attachments:
                fname = attach.name
                if (counterparty == "CS") and not ("Interest" in fname):
                    continue
                p = base_dir / fname
                if not p.parent.exists():
                    p.parent.mkdir(parents=True)
                if not p.exists():
                    p.write_bytes(attach.content)


def get_CS(g):
    for e in g:
        if "This interest, margin" in e.text:
            return float(value)
        value = e.text


def get_BNP(g):
    for e in g:
        if "Due to" in e.text:
            value = next(g).text.replace(",", "")
            return -float(value)


def get_CITI(path):
    df = pd.read_excel(path)
    for row in df.itertuples():
        if "Net Interest Due To CP" in row:
            return -row._6


def get_GS(g):
    for e in g:
        if "TOTAL INTEREST" in e.text:
            next(g)
            return float(next(g).text.replace("USD", "").replace(",", ""))


def get_MS(path):
    df = pd.read_excel(path)
    return -round(df["LOCAL_ACCRUAL"].sum(), 2)


def get_BAML(g):
    for e in g:
        if "Net interest Amount" in e.text:
            return -float(next(g).text.replace("(", "-").replace(")", ""))


def start_end(year, month):
    start = datetime.date(year, month, 1)
    end = start + relativedelta(months=1)
    end -= datetime.timedelta(days=1)
    return start, end


def get_interest(delete=False):
    interest_amounts = defaultdict(float)
    counterparties = ["BNP", "CITI", "CS", "GS", "MS", "BAML"]
    for cp in counterparties:
        try:
            func = globals()[f"get_{cp}"]
        except KeyError:
            continue
        if cp in ("CITI", "MS"):
            for file in Path(
                f"/home/serenitas/Daily/Serenitas/MonthlyInterest/{cp}_reports"
            ).glob("*.xls*"):
                amount = func(file)
                interest_amounts[cp] = interest_amounts[cp] + amount
        else:
            for file in Path(
                f"/home/serenitas/Daily/Serenitas/MonthlyInterest/{cp}_reports"
            ).glob("*.pdf"):
                g = iter(load_pdf(file))
                amount = func(g)
                interest_amounts[cp] = interest_amounts[cp] + amount
        if delete:
            try:
                shutil.rmtree(
                    f"/home/serenitas/Daily/Serenitas/MonthlyInterest/{cp}_reports"
                )
            except FileNotFoundError:
                pass
    return pd.DataFrame(interest_amounts, index=[0]).T.rename(
        index={"BAML": "BAML_ISDA"}, columns={0: "monthly_statement"}
    )


em = ExchangeMessage()
counterparties = ["BNP", "CITI", "CS", "GS", "MS", "BAML"]

parser = argparse.ArgumentParser(description="determine sender destination")
parser.add_argument("start")
parser.add_argument("end", default=datetime.date.today())
parser.add_argument("--auto", action="store_true", help="for automation or for monthly")
parser.add_argument(
    "--delete", action="store_true", default=True, help="for automation or for monthly"
)
args = parser.parse_args()

for cp in counterparties:
    if args.auto:
        download_messages(em, cp, args.start, args.end, auto=args.auto)
    else:
        download_messages(em, cp, args.start, args.end)

if args.auto:
    df = get_interest(delete=args.delete)
    start, end = start_end(
        datetime.datetime.today().year, datetime.datetime.today().month - 1
    )
    new_df = pd.merge(
        export_data(start, end).groupby("broker").sum(),
        df,
        how="outer",
        left_index=True,
        right_index=True,
    )
    new_df["difference"] = new_df["amount"] - new_df["monthly_statement"]