package service

import (
	"bytes"
	"encoding/json"
	"io"
	"mime/multipart"
	"net/http"
	"psi/database"
	"psi/models"
	"time"

	"github.com/pkg/errors"
)

type CancelLogisticsService struct{}

// CancelLogisticsResponse 取消物流接口返回
// 响应格式
type CancelLogisticsResponse struct {
	Msg  string `json:"msg"`
	Code string `json:"code"`
}

// CancelLogistics 取消物流单号
func (s *CancelLogisticsService) CancelLogistics(userID int64, logisticsNo string) (*CancelLogisticsResponse, error) {
	// 1. 调用外部接口取消物流单号
	//定义字节流变量
	var buf bytes.Buffer
	w := multipart.NewWriter(&buf)
	if err := w.WriteField("mailNo", logisticsNo); err != nil {
		return nil, errors.Wrap(err, "构造请求参数失败")
	}
	w.Close()

	resp, err := http.Post("http://119.45.237.193:8073/api/print/cancelBmOrderApi", w.FormDataContentType(), &buf)
	if err != nil {
		return nil, errors.Wrap(err, "调用取消物流接口失败")
	}
	defer resp.Body.Close()

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return nil, errors.Wrap(err, "读取响应失败")
	}

	var cancelResp CancelLogisticsResponse
	if err := json.Unmarshal(body, &cancelResp); err != nil {
		return nil, errors.Wrap(err, "解析响应失败")
	}

	// 2. code 不是 200 直接返回
	if cancelResp.Code != "200" {
		return &cancelResp, nil
	}

	// 3. code == 200: 连接租户库，清空对应物流信息
	tenantDB, err := database.GetTenantDB(userID)
	if err != nil {
		return nil, errors.Wrap(err, "获取租户数据库连接失败")
	}

	now := time.Now().Unix()
	result := tenantDB.Model(&models.SalesOrderItem{}).
		Where("logistics_no = ? AND is_del = ?", logisticsNo, 0).
		Updates(map[string]interface{}{
			"logistics_company": "",
			"logistics_no":      "",
			"updated_at":        now,
		})
	if result.Error != nil {
		return nil, errors.Wrap(result.Error, "清空物流信息失败")
	}

	_ = result.RowsAffected // 不影响返回，仅用于调试

	return &cancelResp, nil
}