# This file is part of Indico.
# Copyright (C) 2002 - 2015 European Organization for Nuclear Research (CERN).
#
# Indico is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 3 of the
# License, or (at your option) any later version.
#
# Indico is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Indico; if not, see <http://www.gnu.org/licenses/>.

from __future__ import unicode_literals

from indico.core.db import db
from indico.core.db.sqlalchemy.custom.unaccent import define_unaccented_lowercase_index
from indico.util.string import return_ascii


class UserEmail(db.Model):
    __tablename__ = 'emails'
    __table_args__ = (db.CheckConstraint('email = lower(email)', 'lowercase_email'),
                      db.Index(None, 'email', unique=True, postgresql_where=db.text('NOT is_user_deleted')),
                      db.Index(None, 'user_id', unique=True,
                               postgresql_where=db.text('is_primary AND NOT is_user_deleted')),
                      {'schema': 'users'})

    #: the unique id of the email address
    id = db.Column(
        db.Integer,
        primary_key=True
    )
    #: the id of the associated user
    user_id = db.Column(
        db.Integer,
        db.ForeignKey('users.users.id'),
        nullable=False,
        index=True
    )
    #: the email address
    email = db.Column(
        db.String,
        nullable=False,
        index=True
    )
    #: if the email is the user's primary email
    is_primary = db.Column(
        db.Boolean,
        nullable=False,
        default=False
    )
    #: if the user is marked as deleted (e.g. due to a merge). DO NOT use this flag when actually deleting an email
    is_user_deleted = db.Column(
        db.Boolean,
        nullable=False,
        default=False
    )

    @return_ascii
    def __repr__(self):
        return '<UserEmail({}, {}, {})>'.format(self.id, self.email, self.is_primary, self.user)


define_unaccented_lowercase_index(UserEmail.email)
