from django.db import models
from django.utils import timezone
from datetime import timedelta
from django.contrib.auth.models import User
from webapp.utils import month_from_now
from django.utils.translation import ugettext_lazy as _
from django.contrib.auth.models import User


class AuditLogEntry(models.Model):
    '''
    A single entry in the audit log
    '''
    user = models.ForeignKey('Official')
    date = models.DateTimeField(default=timezone.now)
    event = models.CharField(choices=[
                             ('CREATED', _('Created')),
                             ('MODIFIED', _('Modified')),
                             ('DELETED', _('Deleted'))],
                             max_length=10)


class AuditedModel(models.Model):
    '''
    Superclass for all audited models, e.g. events
    '''
    pass


class Tag(AuditedModel):
    slug = models.SlugField(primary_key=True)
    name = models.CharField(max_length=127)
    icon = models.ImageField()


class BaseFeed(AuditedModel):
    '''
    model containing something showing on some info feed
    '''
    tags = models.ManyToManyField(Tag, related_name="feeds", blank=True)
    visible = models.BooleanField(default=True)
    title = models.CharField(max_length=255)
    description = models.CharField(max_length=255)
    content = models.TextField()


class Feed(BaseFeed):

    publish_time = models.DateTimeField(default=timezone.now)
    autohide = models.DateTimeField(default=month_from_now)


class Event(BaseFeed):
    start_time = models.DateTimeField(default=timezone.now)
    end_time = models.DateTimeField(default=timezone.now)


class BaseRole(AuditedModel):
    '''
    Base model for occupations/roles
    '''
    name = models.TextField(_('Name'))
    is_board = models.BooleanField(_('Board member'))


class PresetRole(BaseRole):
    '''
    Model representing a preset occupation in the guild
    '''
    description = models.TextField(_('Description'))
    summary = models.TextField(_('Summary'))


class PresetKaehmyRole(PresetRole):
    form = models.ForeignKey('KaehmyForm', related_name='preset_roles')


class CustomKaehmyRole(BaseRole):
    '''
    Model representing a user-specified custom occupation
    '''
    form = models.ForeignKey('KaehmyForm', related_name='custom_roles')


class MessageParent(AuditedModel):
    pass


class KaehmyMessage(MessageParent):
    '''
    Model representing a kaehmymessage.
    Every message relates to certain kaehmyform or parent message.
    '''
    name = models.TextField(_('Name'))
    email = models.EmailField(_('Email'))
    message = models.TextField(_('Message'))
    parent = models.ForeignKey('MessageParent', related_name='messages')


class KaehmyForm(MessageParent):
    '''
    Model representing a form for kaehmy.
    Allows user to choose from existing roles or to create custom ones.
    '''
    name = models.TextField(_('Name'))
    email = models.EmailField(_('Email'))
    year = models.IntegerField(_('Year'))


class Role(PresetRole):
    '''
    Model representing an active or historical occupation
    in an official's history
    '''
    class Meta:
        verbose_name = _('Role')

    start_date = models.DateField(_('Start date'))
    end_date = models.DateField(_('End date'))
    official = models.ForeignKey('Official', related_name='roles')


class Official(User):
    '''
    Model representing a guild official
    '''
    class Meta:
        verbose_name = _('Official')

    phone_number = models.TextField(_('Phone number'))