"""Daemon model: daemons table, auth_tokens.daemon_id, portfolios.managed_by_daemon_id

Revision ID: 20260513_0016
Revises: 20260511_0015
Create Date: 2026-05-13 00:00:00
"""

from __future__ import annotations

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

revision = "20260513_0016"
down_revision = "20260511_0015"
branch_labels = None
depends_on = None


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


def _column_exists(inspector: sa.engine.Inspector, table_name: str, column_name: str) -> bool:
    if not _table_exists(inspector, table_name):
        return False
    return any(c["name"] == column_name for c in inspector.get_columns(table_name))


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

    # Step 1: Create daemons table
    if not _table_exists(inspector, "daemons"):
        op.create_table(
            "daemons",
            sa.Column("id", sa.Text(), nullable=False),
            sa.Column("owner_user_id", sa.Text(), nullable=False),
            sa.Column("daemon_slug", sa.Text(), nullable=False),
            sa.Column("display_name", sa.Text(), nullable=True),
            sa.Column("is_active", sa.Boolean(), nullable=False, server_default=sa.text("true")),
            sa.Column("created_at", sa.TIMESTAMP(timezone=True), nullable=False, server_default=sa.text("NOW()")),
            sa.Column("updated_at", sa.TIMESTAMP(timezone=True), nullable=False, server_default=sa.text("NOW()")),
            sa.PrimaryKeyConstraint("id"),
            sa.UniqueConstraint("owner_user_id", "daemon_slug", name="uq_daemons_owner_slug"),
        )

    # Step 2: Add auth_tokens.daemon_id (nullable FK to daemons.id, no DB-level FK constraint — soft reference)
    if not _column_exists(inspector, "auth_tokens", "daemon_id"):
        op.add_column("auth_tokens", sa.Column("daemon_id", sa.Text(), nullable=True))

    # Step 3: Add portfolios.managed_by_daemon_id (nullable soft reference to daemons.id)
    if not _column_exists(inspector, "portfolios", "managed_by_daemon_id"):
        op.add_column("portfolios", sa.Column("managed_by_daemon_id", sa.Text(), nullable=True))


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

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

    if _column_exists(inspector, "auth_tokens", "daemon_id"):
        op.drop_column("auth_tokens", "daemon_id")

    if _table_exists(inspector, "daemons"):
        op.drop_table("daemons")