"""candles add amount/turnover columns

Revision ID: 20260815_03
Revises: 20260815_02
Create Date: 2026-08-15

- amount   成交额（元）：TDX .day 原生 float32（元）/ Tushare daily amount 千元×1000
- turnover 换手率（%）：Tushare daily_basic.turnover_rate（2000 年起）
均为可空列——历史回补前为 NULL，前端 tooltip 显示 "—"。
"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


revision: str = "20260815_03"
down_revision: Union[str, Sequence[str], None] = "20260815_02"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.add_column("candles", sa.Column("amount", sa.Float(), nullable=True))
    op.add_column("candles", sa.Column("turnover", sa.Float(), nullable=True))


def downgrade() -> None:
    op.drop_column("candles", "turnover")
    op.drop_column("candles", "amount")