"""LLM 设置表 + articles AI 增强字段

Revision ID: 0002
Revises: 0001
Create Date: 2026-06-08
"""
from __future__ import annotations

from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op

revision: str = "0002"
down_revision: Union[str, None] = "0001"
branch_labels = None
depends_on = None


def upgrade() -> None:
    # === llm_settings(单行配置)===
    op.create_table(
        "llm_settings",
        sa.Column("id", sa.Integer, primary_key=True, server_default="1"),
        sa.Column("format_prompt", sa.Text),
        sa.Column("classify_prompt", sa.Text),
        sa.Column("commentary_prompt", sa.Text),
        sa.Column("image_prompt_template", sa.Text),
        sa.Column("image_size", sa.String(16), nullable=False, server_default="1024x768"),
        sa.Column("chat_model", sa.String(64), nullable=False, server_default="agnes-2.0-flash"),
        sa.Column("image_model", sa.String(64), nullable=False, server_default="agnes-image-2.1-flash"),
        sa.Column("interval_sec", sa.Float, nullable=False, server_default="2.0"),
        sa.Column("enabled", sa.Boolean, nullable=False, server_default=sa.text("true")),
        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
        sa.CheckConstraint("id = 1", name="ck_llm_settings_singleton"),
    )

    # === articles 加 LLM 增强字段 ===
    op.add_column("articles", sa.Column("body_zh_formatted", sa.Text))
    op.add_column("articles", sa.Column("image_ai_url", sa.Text))
    op.add_column("articles", sa.Column("format_status", sa.String(16), nullable=False, server_default="n/a"))
    op.add_column("articles", sa.Column("classify_status", sa.String(16), nullable=False, server_default="n/a"))
    op.add_column("articles", sa.Column("image_ai_status", sa.String(16), nullable=False, server_default="n/a"))
    op.add_column("articles", sa.Column("commentary_status", sa.String(16), nullable=False, server_default="n/a"))


def downgrade() -> None:
    op.drop_column("articles", "commentary_status")
    op.drop_column("articles", "image_ai_status")
    op.drop_column("articles", "classify_status")
    op.drop_column("articles", "format_status")
    op.drop_column("articles", "image_ai_url")
    op.drop_column("articles", "body_zh_formatted")
    op.drop_table("llm_settings")