"""Add AI rate limit columns to users, seed default settings

Revision ID: 008
Revises: 007
Create Date: 2026-03-19

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa

revision: str = "008"
down_revision: Union[str, None] = "007"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.add_column("users", sa.Column("max_ai_messages_per_day", sa.Integer, nullable=True))
    op.add_column("users", sa.Column("max_ai_tokens_per_day", sa.Integer, nullable=True))

    op.execute("""
        INSERT INTO settings (id, key, value) VALUES
        (gen_random_uuid(), 'default_max_ai_messages_per_day', '100'),
        (gen_random_uuid(), 'default_max_ai_tokens_per_day', '500000')
        ON CONFLICT (key) DO NOTHING
    """)


def downgrade() -> None:
    op.drop_column("users", "max_ai_tokens_per_day")
    op.drop_column("users", "max_ai_messages_per_day")
    op.execute("DELETE FROM settings WHERE key IN ('default_max_ai_messages_per_day', 'default_max_ai_tokens_per_day')")