"""单设备登录拆分设备类型 + 用户级覆盖

Revision ID: 20260813_split_device_type
Revises: 20260813_token_version
Create Date: 2026-08-13 12:00:00.000000
"""
from alembic import op
import sqlalchemy as sa

# revision identifiers, used by Alembic.
revision = '20260813_split_device_type'
down_revision = '20260813_token_version'
branch_labels = None
depends_on = None


def upgrade():
    # 拆分为按设备类型管理
    op.add_column('users', sa.Column('pc_token_version', sa.Integer(), nullable=False, server_default='0'))
    op.add_column('users', sa.Column('mobile_token_version', sa.Integer(), nullable=False, server_default='0'))
    op.drop_column('users', 'token_version')
    # 用户级覆盖：None=跟随全局, True=强制启用, False=强制禁用
    op.add_column('users', sa.Column('single_device_login_override', sa.Boolean(), nullable=True))


def downgrade():
    op.add_column('users', sa.Column('token_version', sa.Integer(), nullable=False, server_default='0'))
    op.drop_column('users', 'single_device_login_override')
    op.drop_column('users', 'mobile_token_version')
    op.drop_column('users', 'pc_token_version')