# -*- encoding: utf-8 -*-

from flask.ext.wtf import Form
from wtforms.fields import DateField, IntegerField, StringField, HiddenField, PasswordField
from wtforms import validators as v
from wtforms import fields

from wtforms.ext.sqlalchemy.fields import QuerySelectField

import datetime

from . import app
from . import login

today = datetime.date.today

@app.template_test("hidden")
def is_hidden_field(f):
    return isinstance(f, HiddenField)

class DecimalField(fields.DecimalField):
    def process_formdata(self, valuelist):
        if valuelist:
            value = valuelist[0].replace(',','.')
            super(DecimalField, self).process_formdata([value])

req = [v.input_required()]

class ExpenseForm(Form):
    date = DateField(u"Datum", req,
            format="%d.%m.%Y",
            default=lambda: today())

    expense = DecimalField(u"Betrag", req,
            description=u"EUR",
            places=2)

    description = StringField(u"Beschreibung", req)

    category = QuerySelectField(u"Kategorie",
            get_label="name")

class ConstForm(Form):
    start = DateField(u"Beginn", req,
            format="%m.%Y",
            default=lambda: today())

    end = DateField(u"Ende", req,
            format="%m.%Y",
            default=lambda: today().replace(year = today().year + 1),
            description=u"(einschließlich)")

    months = IntegerField(u"Zahlungsrythmus", req,
            description="Monate")

    expense = DecimalField(u"Betrag", req,
            description=u"EUR",
            places=2)

    description = StringField(u"Beschreibung", req)

    category = QuerySelectField(u"Kategorie",
            get_label="name")

    prev = QuerySelectField(u"Vorgänger",
            get_label="description",
            allow_blank=True)

class LoginForm(Form):
    username = StringField(u"Username", req)
    pwd = PasswordField(u"Passwort", req)

    def __init__(self, *args, **kwargs):
        Form.__init__(self,*args, **kwargs)
        self.user = None

    def validate(self):
        rv = Form.validate(self)
        if not rv:
            return False

        user = login.User.get_by(name = self.username.data)
        if user is None or not user.check_password(self.pwd.data):
            return False

        self.user = user
        return True