import sys
from decimal import Decimal

import click
import requests
from ofxtools import OFXTree
from ofxtools.header import OFXHeaderError
from ofxtools.models import Aggregate

from ofx_processor.utils.base_processor import BaseLine, BaseProcessor
from ofx_processor.utils.config import get_config


class OfxBaseLine(BaseLine):
    def get_date(self):
        return self.data.dtposted.isoformat().split("T")[0]

    def get_amount(self):
        return int(self.data.trnamt * 1000)

    def get_memo(self):
        return self.data.memo

    def get_payee(self):
        return self.data.name


class OfxBaseProcessor(BaseProcessor):
    line_class = OfxBaseLine
    account_name = ""

    def parse_file(self):
        ofx = self._parse_file()
        return ofx.statements[0].transactions

    def send_reconciled_amount(self):
        amount = self._get_reconciled_amount()
        click.secho(f"Reconciled balance: {amount}. Sending...", fg="blue")
        self._send_mail(amount)

    def _get_reconciled_amount(self) -> Decimal:
        ofx = self._parse_file()
        return ofx.statements[0].balance.balamt

    def _parse_file(self) -> Aggregate:
        parser = OFXTree()
        try:
            parser.parse(self.filename)
        except (FileNotFoundError, OFXHeaderError):
            click.secho("Couldn't open or parse ofx file", fg="red")
            sys.exit(1)
        ofx = parser.convert()
        return ofx

    def _send_mail(self, amount: Decimal):
        config = get_config(self.account_name)
        if not config.email_setup:
            click.secho("Email is not properly setup", fg="yellow")
            return
        return requests.post(
            f"https://api.mailgun.net/v3/{config.mailgun_domain}/messages",
            auth=("api", config.mailgun_api_key),
            data={
                "from": config.mailgun_from,
                "to": [config.email_recipient],
                "subject": f"Reconciled balance: {amount}",
                "text": f"Here's your reconciled balance: {amount}",
            },
        )