from sqlalchemy import Column, Integer, String, Text, DateTime, Enum, JSON, DECIMAL
from datetime import datetime
from app.core.database import Base

class VasPayment(Base):
    __tablename__ = "vas_payment"

    id = Column(Integer, primary_key=True, autoincrement=True)
    order_id = Column(String(128), nullable=False)

    provider = Column(Enum('stripe', 'wechat', 'alipay'), nullable=False)
    channel = Column(String(50), nullable=False)
    
    # 支付意向ID (Stripe PaymentIntent ID)
    payment_intent_id = Column(String(255))
    # 外部交易号 (微信/支付宝的 transaction_id)
    external_trade_no = Column(String(255))

    # --- 修改点 1: 扩充状态枚举 ---
    status = Column(
        Enum(
            'pending',              # 待支付
            'succeeded',            # 支付成功
            'failed',               # 支付失败
            'expired',              # 支付超时
            'late_paid',            # 逾期支付（极少见）
            'refunded',             # 已全额退款
        ),
        default='pending',
    )
    
    base_amount = Column(Integer, nullable=False)
    adjustment_delta = Column(Integer, default=0)
    final_amount = Column(Integer, nullable=False)
    base_currency = Column(String(10), nullable=False)

    amount = Column(Integer, nullable=False)
    currency = Column(String(10), nullable=False)
    random_offset = Column(Integer, nullable=False)
    
    exchange_rate = Column(DECIMAL(18, 8), nullable=False)

    qr_id = Column(Integer)
    payment_url = Column(Text)
    expire_at = Column(DateTime)

    provider_payload = Column(JSON)
    
    # 外部退款单号 (Stripe Refund ID / 微信退款单号 / 支付宝退款单号)
    external_refund_no = Column(String(255))
    
    # 退款时间
    refunded_at = Column(DateTime)
    
    # 退款原因/备注
    refund_reason = Column(String(255))

    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)