"""per-project Building / Floor / Sector taxonomy (CR-005)

The location taxonomy differs per project — on Micron, floors within B100 behave
like separate buildings — so it is configured once per SOP instead of hard-coded.
CR-018 rolls cost up by these values, which is why the table stores CODES
(`code`, `path`) beside the display `name`: a rollup keyed on a label breaks the
day somebody fixes a typo in it.

`active` rather than a delete. Deactivating hides a value from new work packages
while every package already referencing it still resolves its label, which is the
same rule CR-002 and CR-016 apply to fields.

Additive only: a new table, no change to any existing one, so nothing to backfill
and nothing to migrate.

Revision ID: e2a4c7d91b30
Revises: a7c31f9e5b02
Create Date: 2026-08-16 09:41:02.118307
"""
from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision = 'e2a4c7d91b30'
down_revision = 'a7c31f9e5b02'
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.create_table(
        'location_nodes',
        sa.Column('id', sa.String(length=40), nullable=False),
        sa.Column('project_id', sa.String(length=40), nullable=False),
        sa.Column('parent_id', sa.String(length=40), nullable=True),
        sa.Column('level', sa.String(length=20), nullable=False, server_default='building'),
        sa.Column('code', sa.String(length=60), nullable=False, server_default=''),
        sa.Column('path', sa.String(length=200), nullable=False, server_default=''),
        sa.Column('name', sa.String(length=200), nullable=False, server_default=''),
        sa.Column('active', sa.Boolean(), nullable=False, server_default=sa.true()),
        sa.Column('sort', sa.Integer(), nullable=False, server_default='0'),
        sa.Column('created_by', sa.String(length=200), nullable=False, server_default=''),
        sa.Column('created_at', sa.DateTime(timezone=True), nullable=False,
                  server_default=sa.func.now()),
        sa.Column('updated_at', sa.DateTime(timezone=True), nullable=False,
                  server_default=sa.func.now()),
        sa.ForeignKeyConstraint(['project_id'], ['projects.id'], ondelete='CASCADE'),
        sa.PrimaryKeyConstraint('id'),
        # One row per (project, path). This is what makes a re-import report a
        # duplicate instead of quietly creating a second B100/L2/1P.
        sa.UniqueConstraint('project_id', 'path', name='uq_location_path'),
    )
    op.create_index(op.f('ix_location_nodes_project_id'), 'location_nodes',
                    ['project_id'], unique=False)
    op.create_index(op.f('ix_location_nodes_parent_id'), 'location_nodes',
                    ['parent_id'], unique=False)
    op.create_index(op.f('ix_location_nodes_path'), 'location_nodes', ['path'], unique=False)


def downgrade() -> None:
    op.drop_index(op.f('ix_location_nodes_path'), table_name='location_nodes')
    op.drop_index(op.f('ix_location_nodes_parent_id'), table_name='location_nodes')
    op.drop_index(op.f('ix_location_nodes_project_id'), table_name='location_nodes')
    op.drop_table('location_nodes')