"""
sentry.models.organization
~~~~~~~~~~~~~~~~~~~~~~~~~~

:copyright: (c) 2010-2014 by the Sentry Team, see AUTHORS for more details.
:license: BSD, see LICENSE for more details.
"""
from __future__ import absolute_import, print_function

from bitfield import BitField
from django.conf import settings
from django.db import models
from django.utils import timezone
from django.utils.functional import cached_property
from django.utils.translation import ugettext_lazy as _

from sentry import roles
from sentry.constants import RESERVED_ORGANIZATION_SLUGS
from sentry.db.models import (
    BaseManager, BoundedPositiveIntegerField, Model,
    sane_repr
)
from sentry.db.models.utils import slugify_instance
from sentry.utils.cache import Lock


# TODO(dcramer): pull in enum library
class OrganizationStatus(object):
    VISIBLE = 0
    PENDING_DELETION = 1
    DELETION_IN_PROGRESS = 2


class OrganizationManager(BaseManager):
    # def get_by_natural_key(self, slug):
    #     return self.get(slug=slug)

    def get_for_user(self, user, scope=None):
        """
        Returns a set of all organizations a user has access to.
        """
        from sentry.models import OrganizationMember

        if not user.is_authenticated():
            return []

        if settings.SENTRY_PUBLIC and scope is None:
            return list(self.filter(status=OrganizationStatus.VISIBLE))

        results = list(OrganizationMember.objects.filter(
            user=user,
            organization__status=OrganizationStatus.VISIBLE,
        ).select_related('organization'))

        if scope is not None:
            return [
                r.organization for r in results
                if scope not in r.get_scopes()
            ]
        return [r.organization for r in results]


class Organization(Model):
    """
    An organization represents a group of individuals which maintain ownership of projects.
    """
    name = models.CharField(max_length=64)
    slug = models.SlugField(unique=True)
    status = BoundedPositiveIntegerField(choices=(
        (OrganizationStatus.VISIBLE, _('Visible')),
        (OrganizationStatus.PENDING_DELETION, _('Pending Deletion')),
        (OrganizationStatus.DELETION_IN_PROGRESS, _('Deletion in Progress')),
    ), default=OrganizationStatus.VISIBLE)
    date_added = models.DateTimeField(default=timezone.now)
    members = models.ManyToManyField(settings.AUTH_USER_MODEL, through='sentry.OrganizationMember', related_name='org_memberships')
    default_role = models.CharField(
        choices=roles.get_choices(),
        max_length=32,
        default=roles.get_default().id,
    )

    flags = BitField(flags=(
        ('allow_joinleave', 'Allow members to join and leave teams without requiring approval.'),
        ('enhanced_privacy', 'Enable enhanced privacy controls to limit personally identifiable information (PII) as well as source code in things like notifications.'),
    ), default=1)

    objects = OrganizationManager(cache_fields=(
        'pk',
        'slug',
    ))

    class Meta:
        app_label = 'sentry'
        db_table = 'sentry_organization'

    __repr__ = sane_repr('owner_id', 'name', 'slug')

    @classmethod
    def get_default(cls):
        """
        Return the organization used in single organization mode.
        """
        return cls.objects.filter(
            status=OrganizationStatus.VISIBLE,
        )[0]

    def __unicode__(self):
        return u'%s (%s)' % (self.name, self.slug)

    def save(self, *args, **kwargs):
        if not self.slug:
            lock_key = 'slug:organization'
            with Lock(lock_key):
                slugify_instance(self, self.name,
                                 reserved=RESERVED_ORGANIZATION_SLUGS)
            super(Organization, self).save(*args, **kwargs)
        else:
            super(Organization, self).save(*args, **kwargs)

    def delete(self):
        if self.is_default:
            raise Exception('You cannot delete the the default organization.')
        return super(Organization, self).delete()

    @cached_property
    def is_default(self):
        if not settings.SENTRY_SINGLE_ORGANIZATION:
            return False

        return self == type(self).get_default()

    def has_access(self, user, access=None):
        queryset = self.member_set.filter(user=user)
        if access is not None:
            queryset = queryset.filter(type__lte=access)

        return queryset.exists()

    def get_audit_log_data(self):
        return {
            'id': self.id,
            'slug': self.slug,
            'name': self.name,
            'status': self.status,
            'flags': self.flags,
            'default_role': self.default_role,
        }

    def get_default_owner(self):
        if not hasattr(self, '_default_owner'):
            from sentry.models import User

            self._default_owner = User.objects.filter(
                sentry_orgmember_set__role=roles.get_top_dog().id,
                sentry_orgmember_set__organization=self,
            )[0]
        return self._default_owner

    def has_single_owner(self):
        from sentry.models import OrganizationMember
        count = OrganizationMember.objects.filter(
            organization=self,
            role='owner',
            user__isnull=False,
        ).count()
        return count == 1

    def merge_to(from_org, to_org):
        from sentry.models import (
            ApiKey, AuditLogEntry, OrganizationMember, OrganizationMemberTeam,
            Project, Team
        )

        for from_member in OrganizationMember.objects.filter(organization=from_org):
            try:
                to_member = OrganizationMember.objects.get(
                    organization=to_org,
                    user=from_member.user,
                )
            except OrganizationMember.DoesNotExist:
                from_member.update(organization=to_org)
                to_member = from_member
            else:
                qs = OrganizationMemberTeam.objects.filter(
                    organizationmember=from_member,
                    is_active=True,
                ).select_related()
                for omt in qs:
                    OrganizationMemberTeam.objects.create_or_update(
                        organizationmember=to_member,
                        team=omt.team,
                        defaults={
                            'is_active': True,
                        },
                    )
        for model in (Team, Project, ApiKey, AuditLogEntry):
            model.objects.filter(
                organization=from_org,
            ).update(organization=to_org)
