"""商业交易模型 —— 与 xiaoxia-admin 共享表的 ORM 映射。

xiaoxia-admin（管理后台）与 xiaoxia-saas（用户端）共享同一个数据库：
- plans / subscriptions 表由 admin 的 alembic 迁移创建（admin_alembic_version）
- 用户端在支付链路中需要读取套餐、写入订阅，因此在此做最小映射

注意：不要在此给这些表建迁移；表结构变更走 xiaoxia-admin 仓库。
"""

from __future__ import annotations

from datetime import UTC, datetime

from sqlalchemy import Boolean, Column, DateTime, Integer, Numeric, String, Text
from sqlalchemy.orm import declarative_base

CommerceBase: Any = declarative_base()


def _now() -> datetime:
    return datetime.now(UTC)


class PlanModel(CommerceBase):
    """admin 端 plans 套餐表（只读映射）。"""

    __tablename__ = "plans"

    id = Column(String(36), primary_key=True)
    level_id = Column(String(36), nullable=True)
    plan_key = Column(String(50), nullable=False)
    name = Column(String(100), nullable=False)
    description = Column(Text, nullable=True)
    monthly_price = Column(Numeric(10, 2), nullable=False, default=0)
    yearly_price = Column(Numeric(10, 2), nullable=False, default=0)
    is_enabled = Column(Boolean, nullable=False, default=True)
    display_order = Column(Integer, default=0)
    created_at = Column(DateTime, default=_now)


class SubscriptionRecordModel(CommerceBase):
    """admin 端 subscriptions 订阅记录表（支付成功后写入）。"""

    __tablename__ = "subscriptions"

    id = Column(String(36), primary_key=True)
    user_id = Column(String(36), nullable=False, index=True)
    plan_id = Column(String(36), nullable=False, index=True)
    status = Column(String(20), nullable=False, default="active")
    billing_cycle = Column(String(10), nullable=False)
    start_date = Column(DateTime, nullable=False)
    end_date = Column(DateTime, nullable=False)
    cancelled_at = Column(DateTime, nullable=True)
    created_at = Column(DateTime, default=_now)
    updated_at = Column(DateTime, default=_now)