from collections import OrderedDict, namedtuple

from django.db import models
from django.utils.translation import ugettext_lazy as _


class FeatureType(namedtuple('FeatureType', ('name', 'title', 'title_plural', 'geomtype', 'color'))):
    def __init__(self, *args, **kwartgs):
        FEATURE_TYPES[self.name] = self

FEATURE_TYPES = OrderedDict()
FeatureType('building', _('Building'), _('Buildings'), 'polygon', '#333333')
FeatureType('room', _('Room'), _('Rooms'), 'polygon', '#CCCCCC')
FeatureType('outside', _('Outside Area'), _('Outside Areas'), 'polygon', '#EEEEEE')
FeatureType('obstacle', _('Obstacle'), _('Obstacles'), 'polygon', '#999999')
# FeatureType('door', _('Door'), 'polygon', '#FF00FF')
# FeatureType('step', _('Step'), 'polyline', '#FF0000')
# FeatureType('elevator', _('Elevator'), 'polygon', '#99CC00')


class Feature(models.Model):
    """
    A map feature
    """
    TYPES = tuple((name, t.title) for name, t in FEATURE_TYPES.items())

    name = models.SlugField(_('feature identifier'), primary_key=True, max_length=50, help_text=_('e.g. noc'))
    package = models.ForeignKey('Package', on_delete=models.CASCADE, related_name='features',
                                verbose_name=_('map package'))
    type = models.CharField(max_length=50, choices=TYPES)
    geometry = models.TextField()


class FeatureTitle(models.Model):
    feature = models.ForeignKey('Feature', on_delete=models.CASCADE, related_name='titles',
                                verbose_name=_('map package'))
    language = models.CharField(max_length=50)
    title = models.CharField(max_length=50)

    class Meta:
        unique_together = ('feature', 'language')