from registrasion.models import commerce

from registrasion.controllers.category import CategoryController

from registrasion.controllers.item import ItemController

from decimal import Decimal

from django import template

from django.conf import settings

from django.db.models import Sum

from urllib import urlencode  # TODO: s/urllib/six.moves.urllib/

register = template.Library()

@register.simple_tag(takes_context=True)

def donation_income(context, invoice):

    ''' Calculates the donation income for a given invoice.

    Returns:

        the donation income.

    '''

    # 15% (FSA) goes to Conservancy; 85% is real goods

    fsa_rate = Decimal("0.85")

    rbi_full_ticket = Decimal("68.00")

    rbi_early_bird_discount = Decimal("-21.35")

    rbi = []

    for line in invoice.lineitem_set.all():

        if line.product.category.name == "Ticket":

            if line.product.name.startswith("Unaffiliated Individual"):

                # Includes full price & discounts

                rbi.append(line.total_price * fsa_rate)

            else:

                if line.total_price > 0:

                    rbi.append(rbi_full_ticket)

                elif line.total_price < 0:

                    rbi.append(rbi_early_bird_discount)

        elif line.product.category.name == "T-Shirt":

            rbi.append(line.total_price * fsa_rate)

    return donation.quantize(Decimal('.01'))