"""Reference Data Registry (Missão 5, Fase 1): additive columns on datasets for licence terms,
vigência, file provenance, parse errors and admin approval tracking. Existing rows/kinds are
untouched - new nullable columns, no data migration, no behavior change for the 9 pre-existing
dataset kinds (their own service.py ingestion methods still auto-activate exactly as before).

Revision ID: 0034_reference_data_registry
Revises: 0032_contribuinte_ipi

Note: migration 0033_cfop_ippt_write_mode exists ONLY on feature/cfop-ippt-write, never merged to
master - this migration chains from 0032 (master's real head), not from 0033.
"""
from alembic import op
import sqlalchemy as sa

revision = "0034_reference_data_registry"
down_revision = "0032_contribuinte_ipi"
branch_labels = None
depends_on = None


def upgrade():
    op.add_column("datasets", sa.Column("licence_terms", sa.Text(), nullable=True))
    op.add_column("datasets", sa.Column("valid_from", sa.String(32), nullable=True))
    op.add_column("datasets", sa.Column("valid_to", sa.String(32), nullable=True))
    op.add_column("datasets", sa.Column("file_size_bytes", sa.Integer(), nullable=True))
    op.add_column("datasets", sa.Column("raw_file_path", sa.Text(), nullable=True))
    op.add_column("datasets", sa.Column("parse_errors", sa.JSON(), nullable=False, server_default="{}"))
    op.add_column("datasets", sa.Column("submitted_by", sa.String(128), nullable=True))
    op.add_column("datasets", sa.Column("approved_by", sa.String(128), nullable=True))
    op.add_column("datasets", sa.Column("approved_at", sa.DateTime(timezone=True), nullable=True))


def downgrade():
    for name in ("approved_at", "approved_by", "submitted_by", "parse_errors", "raw_file_path", "file_size_bytes", "valid_to", "valid_from", "licence_terms"):
        op.drop_column("datasets", name)