package refund

import (
	"context"
	"strings"

	"go.uber.org/zap"

	refundapprovalapp "github.com/break/junhong_cmp_fiber/internal/application/refundapproval"
	"github.com/break/junhong_cmp_fiber/internal/model"
)

// refundAssetType 把订单类型映射为退款资产类型：card 单卡、device 设备。
// 与退款列表、详情响应的资产类型口径一致；空值或未知订单类型返回空串。
func refundAssetType(orderType string) string {
	switch orderType {
	case model.OrderTypeSingleCard:
		return "card"
	case model.OrderTypeDevice:
		return "device"
	default:
		return ""
	}
}

// loadRefundMaterial 按既有展示口径解析本次提交的企业微信审批材料事实。
//
// 三个维度各自独立解析且全部尽力而为：
//  1. 资产类型沿用退款申请的下单快照推导（refundAssetType，与详情响应同一规则）；
//  2. 设备类型与型号取退款请求关联设备，无关联设备或设备不可读时留空；
//  3. 套餐已用量与总量复用退款展示解析规则（loadRefundPackageUsages，冻结套餐记录 → 订单主套餐 →
//     订单任一套餐）与真流量口径，解析不到时为 0；
//  4. 原支付渠道交易流水号取创建申请时冻结的原成功支付事实，线下订单为空。
//
// 审批材料是审批判断依据而非金额与状态判定输入，因此解析失败 MUST NOT 阻断审批提交：
// 任一项不可解析时以空值或零值提交，并记录日志供排查。
func (s *Service) loadRefundMaterial(ctx context.Context, refund *model.RefundRequest, payment *model.Payment) refundapprovalapp.RefundMaterial {
	material := refundapprovalapp.RefundMaterial{
		AssetType:              refundAssetType(refund.OrderType),
		OriginalChannelTradeNo: strings.TrimSpace(refund.OriginalChannelTradeNo),
	}
	if payment != nil && strings.TrimSpace(payment.ThirdPartyTradeNo) != "" {
		material.OriginalChannelTradeNo = strings.TrimSpace(payment.ThirdPartyTradeNo)
	}
	if refund.DeviceID != nil && *refund.DeviceID > 0 {
		var device model.Device
		if err := s.db.WithContext(ctx).Select("id", "device_type", "device_model").First(&device, *refund.DeviceID).Error; err != nil {
			s.logMaterialFailure(ctx, refund.ID, "device", err)
		} else {
			material.DeviceType = strings.TrimSpace(device.DeviceType)
			material.DeviceModel = strings.TrimSpace(device.DeviceModel)
		}
	}
	usages, err := s.loadRefundPackageUsages(ctx, []*model.RefundRequest{refund})
	if err != nil {
		s.logMaterialFailure(ctx, refund.ID, "package_usage", err)
	} else if usage, exists := usages[refund.ID]; exists {
		material.PackageUsedMB = usage.UsedMB
		material.PackageTotalMB = usage.TotalMB
	}
	return material
}

// logMaterialFailure 记录审批材料解析失败：材料按空值或零值降级提交，因此只记录不返回错误。
func (s *Service) logMaterialFailure(ctx context.Context, refundID uint, dimension string, err error) {
	if s.logger == nil {
		return
	}
	s.logger.Warn("退款审批材料解析失败，按空值提交",
		zap.Uint("refund_id", refundID), zap.String("dimension", dimension), zap.Error(err))
}