"""Repair site_ips schema - remove site_cidr_id if still present

Revision ID: 013
Revises: 012
Create Date: 2025-12-24

This migration repairs databases where migration 009 failed to drop the
site_cidr_id column due to SQLite limitations. It uses batch mode which
properly handles SQLite's lack of ALTER TABLE DROP COLUMN support.
"""
from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic
revision = '013'
down_revision = '012'
branch_labels = None
depends_on = None


def upgrade():
    """
    Remove site_cidr_id column if it still exists (repair for failed 009).
    """
    connection = op.get_bind()
    inspector = sa.inspect(connection)

    print("\n=== Migration 013: Repair site_ips Schema ===\n")

    # Check if site_cidr_id column still exists
    site_ips_columns = [col['name'] for col in inspector.get_columns('site_ips')]

    if 'site_cidr_id' in site_ips_columns:
        print("Found orphaned site_cidr_id column - repairing...")

        # Use batch mode for SQLite compatibility
        with op.batch_alter_table('site_ips', schema=None) as batch_op:
            batch_op.drop_column('site_cidr_id')

        print("  ✓ Dropped site_cidr_id column from site_ips")
        print("\n✓ Schema repair complete!")
    else:
        print("Schema is correct - site_cidr_id column not present.")
        print("No repair needed.\n")


def downgrade():
    """
    Re-add site_cidr_id column (nullable, since we can't restore data).
    """
    print("\n=== Downgrade 013: Re-add site_cidr_id ===\n")

    with op.batch_alter_table('site_ips', schema=None) as batch_op:
        batch_op.add_column(
            sa.Column('site_cidr_id', sa.Integer(), nullable=True)
        )

    print("  ✓ Re-added site_cidr_id column (nullable)")