"""create todo table

Revision ID: 0001
Revises:
Create Date: 2023-10-30

"""
import sqlalchemy as sa
from alembic import op

# revision identifiers, used by Alembic.
revision = '0001'
down_revision = None
branch_labels = None
depends_on = None


def upgrade() -> None:
    # Create enum type for todo priority
    priority_enum = sa.Enum('low', 'medium', 'high', name='todopriority')
    priority_enum.create(op.get_bind(), checkfirst=True)

    # Create todos table
    op.create_table(
        'todo',
        sa.Column('id', sa.Integer(), nullable=False),
        sa.Column('title', sa.String(length=255), nullable=False),
        sa.Column('description', sa.String(length=1000), nullable=True),
        sa.Column('priority', priority_enum, nullable=False, default='medium'),
        sa.Column('completed', sa.Boolean(), nullable=False, default=False),
        sa.Column('created_at', sa.DateTime(), nullable=False, server_default=sa.func.now()),
        sa.Column('updated_at', sa.DateTime(), nullable=False, server_default=sa.func.now(), onupdate=sa.func.now()),
        sa.PrimaryKeyConstraint('id')
    )

    # Create indexes
    op.create_index(op.f('ix_todo_id'), 'todo', ['id'], unique=False)
    op.create_index(op.f('ix_todo_title'), 'todo', ['title'], unique=False)


def downgrade() -> None:
    # Drop indexes
    op.drop_index(op.f('ix_todo_title'), table_name='todo')
    op.drop_index(op.f('ix_todo_id'), table_name='todo')

    # Drop table
    op.drop_table('todo')

    # Drop enum type
    sa.Enum(name='todopriority').drop(op.get_bind(), checkfirst=True)