package order

import (
	"context"

	"hfb_sys/backend/internal/logging"
	"hfb_sys/backend/internal/model"

	"go.uber.org/zap"
	"gorm.io/gorm"
)

func (r *Repository) prepareRefund(order *model.RentalOrder, amountCent int64, bizType string, remark string) (*refundAction, error) {
	if amountCent <= 0 {
		return nil, nil
	}
	if r.refundStarter == nil {
		return nil, ErrDependencyUnavailable
	}
	order.RefundStatus = refundStatusPending
	order.RefundAmountCent = amountCent
	order.RefundedAt = nil
	return &refundAction{
		OrderID:          order.ID,
		RefundAmountCent: amountCent,
		BizType:          bizType,
		Remark:           remark,
	}, nil
}

// outstandingPaidOrderPaymentCentTx 算出订单实际收到、尚未退回的下单款项。
// 口径是已支付的下单流水合计减去已退/在退的退款流水合计，重复关单不会重复退。
func outstandingPaidOrderPaymentCentTx(tx *gorm.DB, orderID uint64) (int64, error) {
	var paidCent int64
	if err := tx.Model(&model.PaymentOrder{}).
		Where("order_id = ? AND biz_type = ? AND status = ?", orderID, "order_pay", "paid").
		Select("COALESCE(SUM(amount_cent), 0)").Scan(&paidCent).Error; err != nil {
		return 0, err
	}
	if paidCent <= 0 {
		return 0, nil
	}
	var refundedCent int64
	if err := tx.Model(&model.PaymentOrder{}).
		Where("order_id = ? AND biz_type <> ? AND status IN ?", orderID, "order_pay", []string{"refunding", "refunded"}).
		Select("COALESCE(SUM(amount_cent), 0)").Scan(&refundedCent).Error; err != nil {
		return 0, err
	}
	if refundedCent >= paidCent {
		return 0, nil
	}
	return paidCent - refundedCent, nil
}

// pendingPaymentOrderPaidAtChannelForAdmin 在客服关单前核对待支付订单的渠道收款情况。
func (r *Repository) pendingPaymentOrderPaidAtChannelForAdmin(ctx context.Context, orderID uint64) bool {
	if r.paymentProbe == nil {
		return false
	}
	var status string
	err := r.db.WithContext(ctx).Model(&model.RentalOrder{}).
		Where("id = ?", orderID).
		Pluck("status", &status).Error
	if err != nil || status != orderStatusPendingPayment {
		return false
	}
	return r.channelPaidBeforeClose(ctx, orderID)
}

func (r *Repository) startRefundBestEffort(ctx context.Context, action *refundAction) {
	if action == nil || r.refundStarter == nil {
		return
	}
	if _, err := r.refundStarter.StartRefund(ctx, action.OrderID, action.RefundAmountCent, action.BizType, action.Remark); err != nil {
		logging.FromContext(ctx).Error("订单退款提交失败",
			zap.String("module", "order"),
			zap.Uint64("order_id", action.OrderID),
			zap.String("biz_type", action.BizType),
			zap.Int64("amount_cent", action.RefundAmountCent),
			zap.Error(err),
		)
	}
}