"""auto

Revision ID: 2515ed7e2966
Revises: 72853b8d2126
Create Date: 2026-08-07 14:49:26.409410+00:00
"""

from __future__ import annotations

from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa
import sqlmodel  # SQLModel renders AutoString() into migrations but adds no import


revision: str = '2515ed7e2966'
down_revision: Union[str, None] = '72853b8d2126'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None

# Deliberately NOT schema-qualified: Inbox_Messages.application_status carries
# type.schema = None, so the ORM emits the type name unqualified and resolves it
# through search_path. Creating it as app.<name> would not match.
application_status = sa.Enum(
    'PROCESS', 'PENDING', 'APPROVED', 'REJECTED', 'ONHOLD', 'CLOSED',
    name='candidate_application_status',
)


def upgrade() -> None:
    # op.add_column does NOT emit CREATE TYPE, so the ALTER below would fail with
    # `type "candidate_application_status" does not exist`.
    application_status.create(op.get_bind(), checkfirst=True)
    # server_default is required, not cosmetic: the column is NOT NULL and every
    # existing row would be null without it, which Postgres rejects outright.
    op.add_column(
        'inbox_messages',
        sa.Column(
            'application_status',
            application_status,
            nullable=False,
            server_default='CLOSED',
        ),
        schema='app',
    )


def downgrade() -> None:
    op.drop_column('inbox_messages', 'application_status', schema='app')
    # drop_column leaves the TYPE behind; without this, re-running upgrade fails
    # with `type "candidate_application_status" already exists`.
    application_status.drop(op.get_bind(), checkfirst=True)