"""cps v2: 活动 payload(淘口令/京东链接) + 群多平台/sid 可空 + 点击 event_type

Revision ID: cps_v2_platforms
Revises: cps_link_tables
Create Date: 2026-06-17 11:00:00.000000

接入淘宝/京东:
- cps_activity.payload   淘宝整段淘口令文本 / 京东推广链接(美团仍用 act_id)
- cps_group.platforms    该群发哪些平台(多选);sid 改可空(纯淘宝/京东无 sid)
- cps_link.sid 可空 + target_url 加长(淘口令较长)
- cps_click.event_type   visit / copy(淘宝落地页"复制口令")
"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects import postgresql


revision: str = "cps_v2_platforms"
down_revision: Union[str, Sequence[str], None] = "cps_link_tables"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    # 活动:淘宝淘口令 / 京东链接
    op.add_column("cps_activity", sa.Column("payload", sa.Text(), nullable=True))

    # 群:多平台(现有群都是美团,server_default 回填)+ sid 可空
    op.add_column(
        "cps_group",
        sa.Column(
            "platforms",
            sa.JSON().with_variant(postgresql.JSONB(), "postgresql"),
            nullable=False,
            server_default=sa.text("'[\"meituan\"]'::jsonb"),
        ),
    )
    op.alter_column("cps_group", "sid", existing_type=sa.String(64), nullable=True)

    # link:sid 可空 + target 加长
    op.alter_column("cps_link", "sid", existing_type=sa.String(64), nullable=True)
    op.alter_column("cps_link", "target_url", existing_type=sa.String(1024), type_=sa.String(2048))

    # click:sid 可空 + 事件类型
    op.alter_column("cps_click", "sid", existing_type=sa.String(64), nullable=True)
    op.add_column(
        "cps_click",
        sa.Column("event_type", sa.String(16), nullable=False, server_default="visit"),
    )


def downgrade() -> None:
    op.drop_column("cps_click", "event_type")
    op.alter_column("cps_click", "sid", existing_type=sa.String(64), nullable=False)
    op.alter_column("cps_link", "target_url", existing_type=sa.String(2048), type_=sa.String(1024))
    op.alter_column("cps_link", "sid", existing_type=sa.String(64), nullable=False)
    op.drop_column("cps_group", "platforms")
    op.alter_column("cps_group", "sid", existing_type=sa.String(64), nullable=False)
    op.drop_column("cps_activity", "payload")