"""add device_replacements table

Revision ID: h8i9j0k1l2m3
Revises: g7h8i9j0k1l2
Create Date: 2026-04-05
"""
from alembic import op
import sqlalchemy as sa

revision = 'h8i9j0k1l2m3'
down_revision = 'g7h8i9j0k1l2'
branch_labels = None
depends_on = None


def upgrade():
    op.create_table(
        'device_replacements',
        sa.Column('id', sa.BigInteger(), primary_key=True),
        sa.Column('onu_device_id', sa.BigInteger(), sa.ForeignKey('onu_devices.id'), nullable=False),
        sa.Column('old_mac', sa.String(17), nullable=False),
        sa.Column('new_mac', sa.String(17), nullable=False),
        sa.Column('reason', sa.Text()),
        sa.Column('operator_id', sa.String(100)),
        sa.Column('operator_name', sa.String(100)),
        sa.Column('replaced_at', sa.TIMESTAMP(), nullable=False, server_default=sa.text('now()')),
        sa.Column('created_at', sa.TIMESTAMP(), nullable=False, server_default=sa.text('now()')),
    )
    op.create_index('idx_device_replacements_onu_device_id', 'device_replacements', ['onu_device_id'])
    op.create_index('idx_device_replacements_old_mac', 'device_replacements', ['old_mac'])
    op.create_index('idx_device_replacements_new_mac', 'device_replacements', ['new_mac'])


def downgrade():
    op.drop_index('idx_device_replacements_new_mac', 'device_replacements')
    op.drop_index('idx_device_replacements_old_mac', 'device_replacements')
    op.drop_index('idx_device_replacements_onu_device_id', 'device_replacements')
    op.drop_table('device_replacements')