"""新增虎牙充值商品快照表

Revision ID: 20260704_0005
Revises: 20260704_0004
Create Date: 2026-07-04
"""

from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


revision: str = "20260704_0005"
down_revision: Union[str, None] = "20260704_0004"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def _has_table(bind, table_name: str) -> bool:
    return sa.inspect(bind).has_table(table_name)


def _indexes(bind, table_name: str) -> set[str]:
    if not _has_table(bind, table_name):
        return set()
    return {index["name"] for index in sa.inspect(bind).get_indexes(table_name)}


def _create_index_if_missing(bind, name: str, table_name: str, columns: list[str], unique: bool = False) -> None:
    if name not in _indexes(bind, table_name):
        op.create_index(name, table_name, columns, unique=unique)


def upgrade() -> None:
    bind = op.get_bind()
    if not _has_table(bind, "huya_recharge_goods_snapshot"):
        op.create_table(
            "huya_recharge_goods_snapshot",
            sa.Column("id", sa.Integer(), autoincrement=True, nullable=False),
            sa.Column("spu_id", sa.String(length=64), nullable=False),
            sa.Column("sku_id", sa.String(length=64), nullable=True),
            sa.Column("name", sa.String(length=256), nullable=True),
            sa.Column("price", sa.Integer(), nullable=True),
            sa.Column("stock", sa.Integer(), nullable=True),
            sa.Column("buy_limit", sa.Integer(), nullable=True),
            sa.Column("icon", sa.String(length=512), nullable=True),
            sa.Column("description", sa.String(length=512), nullable=True),
            sa.Column("task_id", sa.String(length=64), nullable=True),
            sa.Column("task_name", sa.String(length=256), nullable=True),
            sa.Column("raw", sa.JSON(), nullable=True),
            sa.Column("updated_at", sa.DateTime(), nullable=True),
            sa.PrimaryKeyConstraint("id"),
        )
    _create_index_if_missing(
        bind,
        "ix_huya_recharge_goods_snapshot_spu_id",
        "huya_recharge_goods_snapshot",
        ["spu_id"],
    )
    _create_index_if_missing(
        bind,
        "ix_huya_recharge_goods_snapshot_sku_id",
        "huya_recharge_goods_snapshot",
        ["sku_id"],
    )


def downgrade() -> None:
    bind = op.get_bind()
    if _has_table(bind, "huya_recharge_goods_snapshot"):
        indexes = _indexes(bind, "huya_recharge_goods_snapshot")
        if "ix_huya_recharge_goods_snapshot_sku_id" in indexes:
            op.drop_index("ix_huya_recharge_goods_snapshot_sku_id", table_name="huya_recharge_goods_snapshot")
        if "ix_huya_recharge_goods_snapshot_spu_id" in indexes:
            op.drop_index("ix_huya_recharge_goods_snapshot_spu_id", table_name="huya_recharge_goods_snapshot")
        op.drop_table("huya_recharge_goods_snapshot")