"""localization: users.lang + strategic_log_translations.

Revision ID: 0022
Revises: 0021
Create Date: 2026-05-27
"""
from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op


revision: str = "0022"
down_revision: Union[str, None] = "0021"
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(
            "lang", sa.String(length=8), nullable=False,
            server_default="en",
        ),
    )
    op.create_table(
        "strategic_log_translations",
        sa.Column("id", sa.BigInteger(), primary_key=True, autoincrement=True),
        sa.Column("log_id", sa.BigInteger(), nullable=False),
        sa.Column("lang", sa.String(length=8), nullable=False),
        sa.Column("content_md", sa.Text(), nullable=False),
        sa.Column("generated_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("llm_model", sa.String(length=64), nullable=True),
        sa.Column("llm_cost_usd", sa.Float(), nullable=True),
        sa.ForeignKeyConstraint(
            ["log_id"], ["strategic_logs.id"],
            ondelete="CASCADE", name="fk_slt_log",
        ),
        sa.UniqueConstraint("log_id", "lang", name="uq_slt_log_lang"),
    )


def downgrade() -> None:
    op.drop_table("strategic_log_translations")
    op.drop_column("users", "lang")