import re
import subprocess
from datetime import date

import requests
from flask import Blueprint, current_app, g, render_template, request
from flask_babel import gettext
from flask_weasyprint import HTML, render_pdf

from .forms import MembershipForm

root_page = Blueprint("root", __name__, url_prefix="/<lang_code>")

xml_template = "<member><numm>{name}</numm><gebuertsdag>{birthday:%d.%m.%Y}</gebuertsdag><address>{address}</address><nick>{username}</nick><email>{email}</email><status>{status}</status><stemmrecht>{voting}</stemmrecht></member>"


@root_page.url_defaults
def add_lang_code(endpoint, values):
    values.setdefault("lang_code", g.lang_code)


@root_page.url_value_preprocessor
def pull_lang_code(endpoint, values):
    lang_code = values.pop("lang_code")
    if lang_code != "favicon.ico":
        g.lang_code = lang_code


@root_page.route("/", methods=("GET", "POST"))
def index():
    form = MembershipForm()

    choices = [
        ("cash", gettext("by cash")),
        ("wire transfer", gettext("by wire transfer")),
    ]

    if current_app.config["DIGICASH_ENABLED"]:
        choices.append(("digicash", gettext("by DigiCash")))

    for cryptocurrency_label, options in current_app.config["CRYPTOCURRENCIES"].items():
        if options["ENABLED"]:
            choices.append(
                (
                    cryptocurrency_label,
                    " ".join((gettext("by"), cryptocurrency_label.title())),
                ),
            )

    form.payment.choices = choices

    if form.validate_on_submit():

        xml_data = {}

        if (
            form.minor_member.data
            or form.student.data
            or form.membership.data == "supporting"
        ):

            price = current_app.config["SUPPORTING_FEE"]
        else:
            price = current_app.config["REGULAR_FEE"]

        if form.membership.data == "supporting":
            xml_data["voting"] = 0
        elif form.membership.data == "regular":
            xml_data["voting"] = 1

        if form.starving.data:
            price = 1
            status = "Starving"
        elif form.minor_member.data or form.student.data:
            status = "Student"
        elif form.membership.data == "supporting":
            status = "Supporter"
        else:
            status = "Regular"

        xml_data["status"] = status
        xml_data["name"] = form.fullname.data
        xml_data["birthday"] = (
            form.birthday.data if form.birthday.data is not None else date(9999, 12, 12)
        )
        xml_data["username"] = form.username.data
        xml_data["email"] = form.email.data
        xml_data["address"] = " ".join(
            (
                form.street.data,
                form.zip.data,
                form.city.data,
                form.state.data,
                form.country.data,
            )
        )
        xml_data["address"] = re.sub("\s+", " ", xml_data["address"])

        if form.payment.data in current_app.config["CRYPTOCURRENCIES"]:

            current_conversion_r = requests.get(
                current_app.config["CONVERSION_URL"], timeout=30
            )
            try:
                current_conversion_r.raise_for_status()
            except:
                return 500
            else:
                current_conversion = current_conversion_r.json()
                commodity = current_app.config["CRYPTOCURRENCIES"][form.payment.data][
                    "COMMODITY"
                ]
                price = current_conversion[commodity][status.upper()]
        elif form.payment.data == "digicash":
            price = price * 100

        now = date.today()
        year = now.year
        xml_data["date"] = now

        xml = xml_template.format(**xml_data)
        html = render_template(
            "member.html", form=form, price=price, year=year, xml=xml
        )
        return render_pdf(HTML(string=html))
    return render_template("index.html", form=form)