life-echo/api/app/features/payment/alipay_client.py

"""
支付宝 OpenAPI 封装（从 payment 迁入 app）
"""

from app.core.logging import get_logger
from typing import Dict, Optional

from app.features.payment.payment_config import AlipayConfig
from app.features.payment.schemas import NotifyResult, PaymentResult, PaymentStatus
from app.features.payment.payment_exceptions import (
    PaymentConfigError,
    PaymentCreateError,
    PaymentNotifyError,
    PaymentQueryError,
)

logger = get_logger(__name__)


class AlipayClient:
    def __init__(self, config: AlipayConfig):
        self._config = config
        self._client = None

    def _ensure_client(self):
        if not self._config.is_configured:
            raise PaymentConfigError("支付宝配置不完整，请检查环境变量")
        if self._client is None:
            try:
                from alipay import AliPay

                self._client = AliPay(
                    appid=self._config.app_id,
                    app_notify_url=self._config.notify_url,
                    app_private_key_string=self._config.private_key,
                    alipay_public_key_string=self._config.alipay_public_key,
                    sign_type=self._config.sign_type,
                    debug=False,
                )
                logger.info("支付宝客户端初始化成功")
            except Exception as e:
                raise PaymentConfigError(f"支付宝客户端初始化失败: {e}")

    def create_app_order(
        self,
        out_trade_no: str,
        total_amount: int,
        subject: str,
    ) -> PaymentResult:
        self._ensure_client()
        try:
            amount_yuan = f"{total_amount / 100:.2f}"
            order_string = self._client.api_alipay_trade_app_pay(
                out_trade_no=out_trade_no,
                total_amount=amount_yuan,
                subject=subject,
                notify_url=self._config.notify_url,
            )
            if order_string:
                logger.info("支付宝订单创建成功: %s", out_trade_no)
                return PaymentResult(
                    success=True,
                    payment_method="alipay",
                    out_trade_no=out_trade_no,
                    alipay_order_string=order_string,
                )
            raise PaymentCreateError("支付宝下单失败: 返回空订单字符串")
        except PaymentCreateError:
            raise
        except Exception as e:
            logger.error("支付宝订单创建异常: %s", e)
            raise PaymentCreateError(f"支付宝下单异常: {e}")

    def verify_notify(self, params: Dict[str, str]) -> NotifyResult:
        self._ensure_client()
        try:
            sign = params.pop("sign", None)
            params.pop("sign_type", None)
            if not sign:
                raise PaymentNotifyError("支付宝回调缺少签名参数")
            success = self._client.verify(params, sign)
            if success:
                trade_status = params.get("trade_status", "")
                out_trade_no = params.get("out_trade_no", "")
                trade_no = params.get("trade_no", "")
                total_amount_str = params.get("total_amount", "0")
                total_amount = int(float(total_amount_str) * 100)
                return NotifyResult(
                    success=True,
                    out_trade_no=out_trade_no,
                    trade_no=trade_no,
                    total_amount=total_amount,
                    trade_status=trade_status,
                )
            raise PaymentNotifyError("支付宝回调验签失败")
        except PaymentNotifyError:
            raise
        except Exception as e:
            logger.error("支付宝回调处理异常: %s", e)
            raise PaymentNotifyError(f"支付宝回调处理失败: {e}")

    def query_order(self, out_trade_no: str) -> PaymentStatus:
        self._ensure_client()
        try:
            result = self._client.api_alipay_trade_query(out_trade_no=out_trade_no)
            if result and result.get("code") == "10000":
                trade_status = result.get("trade_status", "")
                trade_no = result.get("trade_no", "")
                total_amount_str = result.get("total_amount", "0")
                total_amount = int(float(total_amount_str) * 100)
                unified_status = self._map_trade_status(trade_status)
                return PaymentStatus(
                    success=True,
                    out_trade_no=out_trade_no,
                    trade_no=trade_no,
                    trade_status=unified_status,
                    total_amount=total_amount,
                )
            error_msg = (
                result.get("sub_msg", result.get("msg", "未知错误"))
                if result
                else "空结果"
            )
            raise PaymentQueryError(f"查询支付宝订单失败: {error_msg}")
        except PaymentQueryError:
            raise
        except Exception as e:
            logger.error("查询支付宝订单异常: %s", e)
            raise PaymentQueryError(f"查询支付宝订单异常: {e}")

    def close_order(self, out_trade_no: str) -> bool:
        self._ensure_client()
        try:
            result = self._client.api_alipay_trade_close(out_trade_no=out_trade_no)
            if result and result.get("code") == "10000":
                logger.info("支付宝订单已关闭: %s", out_trade_no)
                return True
            return False
        except Exception as e:
            logger.error("关闭支付宝订单异常: %s", e)
            return False

    @staticmethod
    def _map_trade_status(alipay_status: str) -> str:
        status_map = {
            "WAIT_BUYER_PAY": "NOTPAY",
            "TRADE_CLOSED": "CLOSED",
            "TRADE_SUCCESS": "SUCCESS",
            "TRADE_FINISHED": "SUCCESS",
        }
        return status_map.get(alipay_status, alipay_status)