"""add portfolio name column

Revision ID: 20260403_0008
Revises: 20260403_0007
Create Date: 2026-04-03 14:45:00
"""

from __future__ import annotations

import sqlalchemy as sa
from alembic import op
from sqlalchemy import inspect


revision = "20260403_0008"
down_revision = "20260403_0007"
branch_labels = None
depends_on = None


def _table_exists(inspector, table_name: str) -> bool:
    return table_name in inspector.get_table_names()


def _column_exists(inspector, table_name: str, column_name: str) -> bool:
    return any(column["name"] == column_name for column in inspector.get_columns(table_name))


def upgrade() -> None:
    bind = op.get_bind()
    inspector = inspect(bind)

    if not _table_exists(inspector, "portfolios"):
        return

    if not _column_exists(inspector, "portfolios", "name"):
        op.add_column("portfolios", sa.Column("name", sa.Text(), nullable=True))

    op.execute("UPDATE portfolios SET name = symbol WHERE name IS NULL OR name = ''")
    op.alter_column("portfolios", "name", existing_type=sa.Text(), nullable=False)


def downgrade() -> None:
    bind = op.get_bind()
    inspector = inspect(bind)

    if not _table_exists(inspector, "portfolios"):
        return

    if _column_exists(inspector, "portfolios", "name"):
        op.drop_column("portfolios", "name")