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"""Add implicit tags

Revision ID: c82ee8a39623
Revises: c18bd4186f15
Create Date: 2018-07-26 11:10:23.653524

"""

# revision identifiers, used by Alembic.
revision = 'c82ee8a39623'
down_revision = 'c617da68de7d'

from alembic import op
from sqlalchemy import Column, Enum, Integer, ForeignKey, String
from sqlalchemy.ext.declarative import declarative_base

from superset.models.helpers import AuditMixinNullable
from superset.models.tags import (
    ObjectTypes,
    TagTypes,
)


Base = declarative_base()


class Tag(Base, AuditMixinNullable):
    """A tag attached to an object (query, chart or dashboard)."""
    __tablename__ = 'tag'

    id = Column(Integer, primary_key=True)
    name = Column(String(250), unique=True)
    type = Column(Enum(TagTypes))


class TaggedObject(Base, AuditMixinNullable):
    __tablename__ = 'tagged_object'

    id = Column(Integer, primary_key=True)
    tag_id = Column(Integer, ForeignKey('tag.id'))
    object_id = Column(Integer)
    object_type = Column(Enum(ObjectTypes))


class User(Base):
    """Declarative class to do query in upgrade"""
    __tablename__ = 'ab_user'
    id = Column(Integer, primary_key=True)


def upgrade():
    bind = op.get_bind()
    Tag.__table__.create(bind)
    TaggedObject.__table__.create(bind)


def downgrade():
    op.drop_table('tagged_object')
    op.drop_table('tag')
