from datetime import datetime, timedelta

from flask import session
from flask_login import current_user
from flask_wtf import FlaskForm as Form
from wtforms import (DateTimeField, SelectField, StringField, SubmitField,
                     validators)

from models import Location, User
from utils import euro_string

__author__ = 'feliciaan'


class OrderForm(Form):
    courrier_id = SelectField('Courrier', coerce=int)
    location_id = SelectField('Location',
                              coerce=int,
                              validators=[validators.required()])
    starttime = DateTimeField('Starttime',
                              default=datetime.now,
                              format='%d-%m-%Y %H:%M')
    stoptime = DateTimeField('Stoptime', format='%d-%m-%Y %H:%M')
    submit_button = SubmitField('Submit')

    def populate(self):
        if current_user.is_admin():
            self.courrier_id.choices = [(0, None)] + \
                                       [(u.id, u.username) for u in User.query.order_by('username')]
        else:
            self.courrier_id.choices = [(0, None),
                                        (current_user.id,
                                         current_user.username)]
        self.location_id.choices = [(l.id, l.name)
                                    for l in Location.query.order_by('name')]
        if self.stoptime.data is None:
            self.stoptime.data = datetime.now() + timedelta(hours=1)


class OrderItemForm(Form):
    product_id = SelectField('Item', coerce=int)
    extra = StringField('Extra')
    submit_button = SubmitField('Submit')

    def populate(self, location):
        self.product_id.choices = [(i.id,
                                    (i.name + ": " + euro_string(i.price)))
                                   for i in location.products]


class AnonOrderItemForm(OrderItemForm):
    name = StringField('Name', validators=[validators.required()])

    def populate(self, location):
        OrderItemForm.populate(self, location)
        if self.name.data is None:
            self.name.data = session.get('anon_name', None)

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

        # check if we have a user with this name
        user = User.query.filter_by(username=self.name.data).first()
        if user is not None:
            self.name.errors.append('Name already in use')
            return False
        return True