"""create migrations table
Revision ID: a2b3c4d5e6f7
Revises: 
Create Date: 2023-01-01 12:00:00.000000
"""
from alembic import op
import sqlalchemy as sa
from sqlalchemy.sql import func
import uuid

# revision identifiers
revision = 'a2b3c4d5e6f7'
down_revision = None
branch_labels = None
depends_on = None

def upgrade():
    op.create_table(
        'migrations',
        sa.Column('id', sa.String(), primary_key=True, default=lambda: str(uuid.uuid4())),
        sa.Column('version', sa.String(), nullable=False),
        sa.Column('description', sa.String(), nullable=True),
        sa.Column('applied', sa.Boolean(), default=False),
        sa.Column('script_path', sa.String(), nullable=False),
        sa.Column('checksum', sa.String(), nullable=True),
        sa.Column('execution_time', sa.DateTime(), nullable=True),
        sa.Column('created_at', sa.DateTime(), server_default=sa.func.now()),
        sa.Column('updated_at', sa.DateTime(), server_default=sa.func.now(), onupdate=sa.func.now()),
        sa.PrimaryKeyConstraint('id')
    )
    
    op.create_index('ix_migrations_version', 'migrations', ['version'])

def downgrade():
    op.drop_index('ix_migrations_version', 'migrations')
    op.drop_table('migrations')