"""Add printeditemfiles: append-only print-file revisions per item.

The plugin's first incremental migration on top of its 0001 baseline -
the ADR-008 payoff: the plugin evolves its own schema without touching
the core chain. Applied by `flask plugin upgrade-all`.
"""
from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision = 'printedparts0002files'
down_revision = 'printedparts0001baseline'
branch_labels = None
depends_on = None


def upgrade():
    op.create_table(
        'printeditemfiles',
        sa.Column('fileid', sa.Integer(), nullable=False),
        sa.Column('printeditemid', sa.Integer(), nullable=False),
        sa.Column('revision', sa.Integer(), nullable=False),
        sa.Column('filename', sa.String(length=255), nullable=False),
        sa.Column('storedfilename', sa.String(length=191), nullable=False),
        sa.Column('filesize', sa.Integer(), nullable=False),
        sa.Column('uploadnote', sa.String(length=255), nullable=True),
        sa.Column('uploadedby', sa.String(length=80), nullable=False),
        sa.Column('createddate', sa.DateTime(), nullable=False),
        sa.Column('modifieddate', sa.DateTime(), nullable=False),
        sa.Column('isactive', sa.Boolean(), nullable=False),
        sa.ForeignKeyConstraint(['printeditemid'],
                                ['printeditems.printeditemid'],
                                ondelete='CASCADE'),
        sa.PrimaryKeyConstraint('fileid'),
        sa.UniqueConstraint('storedfilename'),
    )
    op.create_index('ix_printeditemfiles_printeditemid',
                    'printeditemfiles', ['printeditemid'])


def downgrade():
    op.drop_table('printeditemfiles')