package basic

import (
	"encoding/json"
	"errors"
	"fmt"
	"github.com/gin-gonic/gin"
	"go-admin/app/admin/middleware"
	"go-admin/app/admin/models"
	orm "go-admin/common/global"
	"go-admin/logger"
	"go-admin/tools/app"
	"gorm.io/gorm"
	"io"
	"net/http"
	"strconv"
)

// CommodityCreate 新增商品
// @Summary 新增商品
// @Tags 商品资料
// @Produce json
// @Accept json
// @Param request body models.CommodityCreateAndEditRequest true "商品新增模型"
// @Success 200 {object} models.ErpCommodity
// @Router /api/v1/commodity/create [post]
// 规则：商品名称/商品编号相同则为同一商品，创建的时候由于商品编号不重复，无需判断
func CommodityCreate(c *gin.Context) {
	var req = new(models.CommodityCreateAndEditRequest)

	err := c.ShouldBindJSON(&req)
	if err != nil {
		fmt.Println(err.Error())
		app.Error(c, http.StatusBadRequest, errors.New("param err"), "参数错误:"+err.Error())
		return
	}

	// 小程序商品入参校验
	if req.IsSyncedToMall == 1 {
		if req.GoodsAccountNum == 0 {
			app.Error(c, http.StatusBadRequest, errors.New("goods_account_num empty"), "收款账户不能为空")
			return
		}
		if req.PriceOriginal == 0 {
			app.Error(c, http.StatusBadRequest, errors.New("price_original empty"), "市场价不能为空")
			return
		} else {
			req.PriceOriginal = req.PriceOriginal * 100
		}
		if req.PriceRm == 0 {
			req.PriceRm = req.PriceOriginal
		} else {
			req.PriceRm = req.PriceRm * 100
		}
		// CatId 必须存在于 GoodsCat 表
		var goodsCat models.GoodsCat
		if err := orm.Eloquent.Model(&models.GoodsCat{}).Where("id = ?", req.CatId).Find(&goodsCat).Error; err != nil {
			app.Error(c, http.StatusInternalServerError, err, "查询商品分类失败")
			return
		}
		if goodsCat.ID == 0 {
			app.Error(c, http.StatusBadRequest, errors.New("cat_id invalid"), "商品分类不存在")
			return
		}
		if goodsCat.Pid == 0 {
			app.Error(c, http.StatusBadRequest, errors.New("cat_id invalid"), "小程序商城分类错误，不能选一级分类")
			return
		}
	}

	barCode := ""
	if req.ErpBarcode != "" { // 条码不为空则校验
		barCode, err = models.CheckAndConvertBarcode(req.ErpBarcode)
		if err != nil {
			app.Error(c, http.StatusBadRequest, errors.New("param err"), "参数错误:"+err.Error())
			return
		}
	} else { // 条码为空则自动生成
		barCode, err = models.GenerateBarcode(req.ErpCategoryId)
		if err != nil {
			app.Error(c, http.StatusBadRequest, errors.New("gen barcode err"), err.Error())
			return
		}
	}

	brokerage1Float := req.Brokerage1
	brokerage2Float := req.Brokerage2
	memberDiscountFloat := req.MemberDiscount

	if models.IsExistingProduct(req.Name) {
		app.Error(c, http.StatusBadRequest, errors.New("param err"), "商品名称已存在，不能重复")
		return
	}

	if req.IsIMEI == 2 { // 是否串码：1-串码类 2-非串码
		req.IMEIType = 1 // 系统生成串码：2-是（系统生成） 3-否（手动添加） 1表示非串码
	}

	// 开启事务
	tx := orm.Eloquent.Begin()
	if tx.Error != nil {
		app.Error(c, http.StatusInternalServerError, tx.Error, "开启事务失败")
		return
	}

	defer func() {
		if r := recover(); r != nil {
			tx.Rollback()
			app.Error(c, http.StatusInternalServerError, errors.New("panic"), fmt.Sprintf("事务异常: %v", r))
		}
	}()

	// （1）如果需要同步到小程序商城，先创建 Goods
	var goodsId uint32
	if req.IsSyncedToMall == 1 {
		goodsId, err = CreateMallGoods(tx, req)
		if err != nil {
			tx.Rollback()
			app.Error(c, http.StatusInternalServerError, err, err.Error())
			return
		}
	}

	// (2) 创建 ERP 商品，回写 GoodsId
	commodity := &models.ErpCommodity{
		Number:          1,
		Name:            req.Name,
		ErpCategoryId:   req.ErpCategoryId,
		ErpCategoryName: "",
		ErpBarcode:      barCode,
		IMEIType:        req.IMEIType,
		ErpSupplierId:   req.ErpSupplierId,
		ErpSupplierName: "",
		RetailPrice:     req.RetailPrice,
		MinRetailPrice:  req.MinRetailPrice,
		//StaffCostPrice:  req.StaffCostPrice + req.WholesalePrice,
		StaffCostPrice:   req.StaffCostPrice,
		WholesalePrice:   req.WholesalePrice,
		Brokerage1:       brokerage1Float,
		Brokerage2:       brokerage2Float,
		MemberDiscount:   memberDiscountFloat,
		Origin:           req.Origin,
		Remark:           req.Remark,
		Img:              req.Img,
		StopPurchase:     req.StopPurchase,
		ManufacturerCode: req.ManufacturerCode,
		IsSyncedToMall:   req.IsSyncedToMall,
		GoodsId:          goodsId,
		SaleStatus:       2,
	}
	err = commodity.SetErpCategory()
	if err != nil {
		tx.Rollback()
		app.Error(c, http.StatusInternalServerError, err, "创建失败")
		return
	}
	err = commodity.IdInit()
	if err != nil {
		tx.Rollback()
		app.Error(c, http.StatusInternalServerError, err, "创建失败:"+err.Error())
		return
	}

	commodity.SerialNumber, err = models.GenerateSerialNumber(req.ErpCategoryId)
	if err != nil {
		tx.Rollback()
		app.Error(c, http.StatusInternalServerError, err, err.Error())
		return
	}

	err = tx.Create(commodity).Error
	if err != nil {
		tx.Rollback()
		app.Error(c, http.StatusInternalServerError, err, "创建失败")
		return
	}

	// (3) 更新 Goods.ErpCommodityId
	if req.IsSyncedToMall == 1 {
		if err = tx.Model(&models.Goods{}).
			Where("goods_id = ?", goodsId).
			Update("erp_commodity_id", commodity.ID).Error; err != nil {
			tx.Rollback()
			app.Error(c, http.StatusInternalServerError, err, "更新商城商品编号失败")
			return
		}
	}

	// (4) 提交事务
	if err = tx.Commit().Error; err != nil {
		app.Error(c, http.StatusInternalServerError, err, "提交事务失败")
		return
	}
	commodity.CatId = req.CatId
	commodity.GoodsAccountNum = req.GoodsAccountNum
	commodity.PriceOriginal = req.PriceOriginal
	commodity.PriceRm = req.PriceRm
	commodity.Detail = req.Detail

	app.OK(c, commodity, "OK")
	return
}

// CreateMallGoods 创建小程序商城商品及默认SKU
func CreateMallGoods(tx *gorm.DB, req *models.CommodityCreateAndEditRequest) (uint32, error) {
	// 创建规格值（SpecValue）
	specListStr, specValueID, err := BuildAndCreateSpecValue(tx, req.Name)
	if err != nil {
		return 0, fmt.Errorf("创建规格值失败: %w", err)
	}

	goodsSerialNo := models.CreateGoodsSerialNo()
	goodsId := models.CreateGoodsId()

	// 默认折扣配置
	defaultDiscount := map[string]int{
		"gold":       100,
		"platinum":   100,
		"black_gold": 100,
	}
	discountBytes, _ := json.Marshal(defaultDiscount)

	goods := &models.Goods{
		GoodsId:         goodsId,
		SerialNo:        goodsSerialNo,
		CatId:           req.CatId,
		Name:            req.Name,
		MainImage:       req.Img,
		Images:          req.Img,
		Detail:          req.Detail,
		SaleStatus:      2, // 默认下架
		PriceOriginal:   req.PriceOriginal,
		PriceRm:         req.PriceRm,
		GoodsAccountNum: req.GoodsAccountNum,
		SpecList:        specListStr,
		SpecIndex:       strconv.Itoa(int(specValueID)),
		DiscountList:    string(discountBytes),
	}

	// 创建商城商品
	if err := tx.Create(goods).Error; err != nil {
		return 0, fmt.Errorf("创建商城商品失败: %w", err)
	}

	// 创建默认 SKU
	if err := CreateDefaultSKU(tx, goods, req.PriceOriginal, req.PriceRm); err != nil {
		return 0, fmt.Errorf("创建商品 SKU 失败: %w", err)
	}

	return goodsId, nil
}

// BuildAndCreateSpecValue 生成并创建规格值
func BuildAndCreateSpecValue(tx *gorm.DB, productName string) (specListStr string, specValueID uint32, err error) {
	// 1. 创建规格 Spec
	spec := models.Spec{
		DisplayName: productName,
		Name:        "",
		State:       2,
		Sort:        0,
		Values:      []models.SpecValue{},
	}

	if err := tx.Create(&spec).Error; err != nil {
		return "", 0, err
	}

	// 2. 创建规格值 SpecValue
	specValue := models.SpecValue{
		SpecId:          spec.ID,
		SpecDisplayName: spec.DisplayName,
		SpecName:        spec.Name,
		DisplayValue:    productName,
		State:           2,
		Value:           "",
		SpecSort:        0,
		Sort:            1,
	}

	if err := tx.Create(&specValue).Error; err != nil {
		return "", 0, err
	}

	specValueID = spec.ID

	// 3. 构造 spec_list JSON
	type SpecWithValues struct {
		Spec   models.Spec        `json:"spec"`
		Values []models.SpecValue `json:"values"`
	}

	//spec.Values = append(spec.Values, specValue)
	specList := []SpecWithValues{
		{
			Spec:   spec,
			Values: []models.SpecValue{specValue},
		},
	}

	data, err := json.Marshal(specList)
	if err != nil {
		return "", 0, err
	}

	return string(data), specValueID, nil
}

// CreateDefaultSKU 创建默认 SKU
func CreateDefaultSKU(tx *gorm.DB, goods *models.Goods, retailPrice, rmPrice uint32) error {
	// 先解析 goods.SpecList
	var specItems []struct {
		Spec   interface{}              `json:"spec"`
		Values []map[string]interface{} `json:"values"`
	}
	if err := json.Unmarshal([]byte(goods.SpecList), &specItems); err != nil {
		return fmt.Errorf("failed to unmarshal SpecList: %w", err)
	}

	// 拍平所有 values
	var specValues []map[string]interface{}
	for _, item := range specItems {
		if len(item.Values) > 0 {
			specValues = append(specValues, item.Values...)
		}
	}

	// 转回 json 存储到 attribute.SpecValueList
	specValuesBytes, err := json.Marshal(specValues)
	if err != nil {
		return fmt.Errorf("failed to marshal spec values: %w", err)
	}

	attribute := &models.GoodsAttribute{
		GoodsId:        goods.GoodsId,
		SerialNo:       goods.SerialNo,
		CatId:          goods.CatId,
		Name:           goods.Name,
		Title:          goods.Title,
		MainImage:      goods.MainImage,
		SpecValueIndex: goods.SpecIndex,
		SpecValueList:  string(specValuesBytes), // ✅ 已拍平的 values
		PriceOriginal:  retailPrice,
		DealType:       2,
	}

	combo := models.GoodsAttributeCombo{
		GoodsId:   goods.GoodsId,
		SerialNo:  goods.SerialNo,
		CatId:     goods.CatId,
		Name:      goods.Name,
		Title:     goods.Title,
		MainImage: goods.MainImage,
		PriceRm:   rmPrice,
		PriceVm:   0,
		ComboName: goods.Name,
	}

	attribute.Combos = []models.GoodsAttributeCombo{combo}

	if err := tx.Create(attribute).Error; err != nil {
		return err
	}

	combo.GoodsAttributeId = attribute.ID
	if err := tx.Create(&combo).Error; err != nil {
		return err
	}

	return nil
}

// UpdateMallGoodsName 根据 goodsId 更新商品相关表的名称
func UpdateMallGoodsName(tx *gorm.DB, goodsId uint32, req *models.CommodityCreateAndEditRequest) error {
	if goodsId == 0 {
		return errors.New("goodsId 不能为空")
	}
	if req.Name == "" {
		return errors.New("新名称不能为空")
	}

	// 先查出 Goods，获取 specIndex
	var goods models.Goods
	if err := tx.Model(&models.Goods{}).
		Where("goods_id = ?", goodsId).
		First(&goods).Error; err != nil {
		return fmt.Errorf("查询 Goods 失败: %w", err)
	}
	specIndex := goods.SpecIndex

	// 1. 更新 Goods 表
	if err := tx.Model(&models.Goods{}).
		Where("goods_id = ?", goodsId).
		Updates(map[string]interface{}{
			"name":              req.Name,
			"cat_id":            req.CatId,
			"goods_account_num": req.GoodsAccountNum,
			"price_original":    req.PriceOriginal,
			"price_rm":          req.PriceRm,
			"detail":            req.Detail,
			"main_image":        req.Img,
		}).Error; err != nil {
		return fmt.Errorf("更新 Goods 失败: %w", err)
	}

	// 2. 更新 Spec 表
	if err := tx.Model(&models.Spec{}).
		Where("id = ?", specIndex).
		Update("display_name", req.Name).Error; err != nil {
		return fmt.Errorf("更新 Spec 失败: %w", err)
	}

	// 3. 更新 SpecValue 表
	if err := tx.Model(&models.SpecValue{}).
		Where("spec_id = ?", specIndex).
		Updates(map[string]interface{}{
			"spec_display_name": req.Name,
			"display_value":     req.Name,
		}).Error; err != nil {
		return fmt.Errorf("更新 SpecValue 失败: %w", err)
	}

	// 3.1 读取最新的 SpecValue
	var specValues []models.SpecValue
	if err := tx.Model(&models.SpecValue{}).
		Where("spec_id = ?", specIndex).
		Find(&specValues).Error; err != nil {
		return fmt.Errorf("查询 SpecValue 失败: %w", err)
	}

	specValueList := make([]string, 0, len(specValues))
	for _, v := range specValues {
		specValueList = append(specValueList, v.DisplayValue)
	}
	specValueListJSON, err := json.Marshal(specValueList)
	if err != nil {
		return fmt.Errorf("序列化 SpecValueList 失败: %w", err)
	}

	// 4. 更新 GoodsAttribute 表
	if err := tx.Model(&models.GoodsAttribute{}).
		Where("goods_id = ?", goodsId).
		Updates(map[string]interface{}{
			"name":            req.Name,
			"cat_id":          req.CatId,
			"price_original":  req.PriceOriginal,
			"price_rm":        req.PriceRm,
			"main_image":      req.Img,
			"spec_value_list": string(specValueListJSON),
		}).Error; err != nil {
		return fmt.Errorf("更新 GoodsAttribute 失败: %w", err)
	}

	// 5. 更新 GoodsAttributeCombo 表
	if err := tx.Model(&models.GoodsAttributeCombo{}).
		Where("goods_id = ?", goodsId).
		Updates(map[string]interface{}{
			"name":       req.Name,
			"cat_id":     req.CatId,
			"price_rm":   req.PriceRm,
			"main_image": req.Img,
		}).Error; err != nil {
		return fmt.Errorf("更新 GoodsAttributeCombo 失败: %w", err)
	}

	return nil
}

// DeleteMallGoods 根据 goodsId 删除商城商品及相关表数据
func DeleteMallGoods(tx *gorm.DB, goodsId uint32) error {
	if goodsId == 0 {
		return errors.New("goodsId 不能为空")
	}

	// 1. 查询 Goods，获取 specIndex
	var goods models.Goods
	if err := tx.Model(&models.Goods{}).
		Where("goods_id = ?", goodsId).
		First(&goods).Error; err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return fmt.Errorf("未找到对应的 Goods 记录 goodsId=%d", goodsId)
		}
		return fmt.Errorf("查询 Goods 失败: %w", err)
	}
	specIndex := goods.SpecIndex

	// 2. 删除 Goods
	if err := tx.Where("goods_id = ?", goodsId).
		Delete(&models.Goods{}).Error; err != nil {
		return fmt.Errorf("删除 Goods 失败: %w", err)
	}

	// 3. 删除 Spec
	if err := tx.Where("id = ?", specIndex).
		Delete(&models.Spec{}).Error; err != nil {
		return fmt.Errorf("删除 Spec 失败: %w", err)
	}

	// 4. 删除 SpecValue
	if err := tx.Where("spec_id = ?", specIndex).
		Delete(&models.SpecValue{}).Error; err != nil {
		return fmt.Errorf("删除 SpecValue 失败: %w", err)
	}

	// 5. 删除 GoodsAttribute
	if err := tx.Where("goods_id = ?", goodsId).
		Delete(&models.GoodsAttribute{}).Error; err != nil {
		return fmt.Errorf("删除 GoodsAttribute 失败: %w", err)
	}

	// 6. 删除 GoodsAttributeCombo
	if err := tx.Where("goods_id = ?", goodsId).
		Delete(&models.GoodsAttributeCombo{}).Error; err != nil {
		return fmt.Errorf("删除 GoodsAttributeCombo 失败: %w", err)
	}

	return nil
}

// CommodityList 商品列表
// @Summary 商品列表
// @Tags 商品资料
// @Produce json
// @Accept json
// @Param request body models.ErpCommodityListReq true "商品列表模型"
// @Success 200 {object} models.ErpCommodityListResp
// @Router /api/v1/commodity/list [post]
func CommodityList(c *gin.Context) {
	req := &models.ErpCommodityListReq{}
	if err := c.ShouldBindJSON(&req); err != nil {
		//logger.Error(err)
		app.Error(c, http.StatusBadRequest, errors.New("para err"), "参数错误")
		return
	}

	resp, err := req.List()
	if err != nil {
		//logger.Error("erp commodity list err:", err)
		app.Error(c, http.StatusInternalServerError, err, "获取失败")
		return
	}

	app.OK(c, resp, "")
	return
}

// CommodityDetail 商品详情
// @Summary 商品详情
// @Tags 商品资料
// @Produce json
// @Accept json
// @Param request body  models.CommodityDetailRequest true "商品详情模型"
// @Success 200 {object} models.ErpCommodity
// @Router /api/v1/commodity/detail [post]
func CommodityDetail(c *gin.Context) {
	var req = new(models.CommodityDetailRequest)

	if err := c.ShouldBindJSON(&req); err != nil {
		//logger.Error(err)
		app.Error(c, http.StatusBadRequest, errors.New("para err"), "参数错误")
		return
	}

	var commodity models.ErpCommodity
	qs := orm.Eloquent.Table("erp_commodity")
	if req.ErpCommodityId != 0 {
		qs = qs.Where("id=?", req.ErpCommodityId)
	}
	if req.SerialNumber != "" {
		qs = qs.Where("serial_number=?", req.SerialNumber)
	}
	err := qs.Find(&commodity).Error
	if err != nil {
		//logger.Error("erp commodity err:", err)
		app.Error(c, http.StatusInternalServerError, err, "获取失败")
		return
	}

	if commodity.IMEIType == 1 { //无串码
		commodity.IsIMEI = 2 // 非串码
	} else {
		commodity.IsIMEI = 1 // 串码
	}

	// 查询是否有库存
	var count int64
	err = orm.Eloquent.Table("erp_stock_commodity").Where("erp_commodity_id = ? and state = ?",
		commodity.ID, models.InStock).Count(&count).Error
	if err != nil {
		app.Error(c, http.StatusInternalServerError, err, "获取商品库存信息失败")
		return
	}
	commodity.StockCount = uint32(count)

	// 如果有同步小程序商城则查询对应信息
	if commodity.IsSyncedToMall == 1 && commodity.GoodsId != 0 {
		// 查询 Goods
		var goods models.Goods
		if err := orm.Eloquent.Model(&models.Goods{}).Where("goods_id = ?", commodity.GoodsId).
			First(&goods).Error; err != nil {
			app.Error(c, http.StatusInternalServerError, err, "获取小程序商城信息失败")
			return
		}
		commodity.CatId = goods.CatId
		commodity.GoodsAccountNum = goods.GoodsAccountNum
		commodity.PriceOriginal = goods.PriceOriginal / 100
		commodity.PriceRm = goods.PriceRm / 100
		commodity.Detail = goods.Detail
	}

	app.OK(c, commodity, "")
	return
}

// CommodityEdit 编辑商品
// @Summary 编辑商品
// @Tags 商品资料
// @Produce json
// @Accept json
// @Param request body  models.CommodityCreateAndEditRequest true "编辑商品模型"
// @Success 200 {object} models.ErpCommodity
// @Router /api/v1/commodity/edit [post]
func CommodityEdit(c *gin.Context) {
	var req = new(models.CommodityCreateAndEditRequest)
	err := c.ShouldBindJSON(&req)
	if err != nil {
		logger.Error("ShouldBindJSON err:", logger.Field("err", err))
		app.Error(c, http.StatusBadRequest, errors.New("para err"), "参数错误:"+err.Error())
		return
	}

	// 小程序商品入参校验
	if req.IsSyncedToMall == 1 {
		if req.GoodsAccountNum == 0 {
			app.Error(c, http.StatusBadRequest, errors.New("goods_account_num empty"), "收款账户不能为空")
			return
		}
		if req.PriceOriginal == 0 {
			app.Error(c, http.StatusBadRequest, errors.New("price_original empty"), "市场价不能为空")
			return
		} else {
			req.PriceOriginal = req.PriceOriginal * 100
		}
		if req.PriceRm == 0 {
			req.PriceRm = req.PriceOriginal
		} else {
			req.PriceRm = req.PriceRm * 100
		}
		// CatId 必须存在于 GoodsCat 表
		var goodsCat models.GoodsCat
		if err := orm.Eloquent.Model(&models.GoodsCat{}).Where("id = ?", req.CatId).Find(&goodsCat).Error; err != nil {
			app.Error(c, http.StatusInternalServerError, err, "查询商品分类失败")
			return
		}
		if goodsCat.ID == 0 {
			app.Error(c, http.StatusBadRequest, errors.New("cat_id invalid"), "商品分类不存在")
			return
		}
		if goodsCat.Pid == 0 {
			app.Error(c, http.StatusBadRequest, errors.New("cat_id invalid"), "小程序商城分类错误，不能选一级分类")
			return
		}
	}

	barCode := ""
	if req.ErpBarcode != "" { // 条码不为空则校验
		barCode, err = models.CheckBarcodeById(req.ErpBarcode, req.Id)
		if err != nil {
			app.Error(c, http.StatusBadRequest, errors.New("param err"), "参数错误:"+err.Error())
			return
		}
	} else { // 条码为空则自动生成
		barCode, err = models.GenerateBarcode(req.ErpCategoryId)
		if err != nil {
			app.Error(c, http.StatusBadRequest, errors.New("gen barcode err"), err.Error())
			return
		}
	}

	brokerage1Float := req.Brokerage1
	brokerage2Float := req.Brokerage2
	memberDiscountFloat := req.MemberDiscount

	commodity := &models.ErpCommodity{
		Name:            req.Name,
		ErpCategoryId:   req.ErpCategoryId,
		ErpCategoryName: "",
		ErpBarcode:      barCode,
		IMEIType:        req.IMEIType,
		ErpSupplierId:   req.ErpSupplierId,
		ErpSupplierName: "",
		RetailPrice:     req.RetailPrice,
		MinRetailPrice:  req.MinRetailPrice,
		//StaffCostPrice:  req.StaffCostPrice + req.WholesalePrice,
		StaffCostPrice:   req.StaffCostPrice,
		WholesalePrice:   req.WholesalePrice,
		Brokerage1:       brokerage1Float,
		Brokerage2:       brokerage2Float,
		MemberDiscount:   memberDiscountFloat,
		Origin:           req.Origin,
		Remark:           req.Remark,
		Img:              req.Img,
		StopPurchase:     req.StopPurchase,
		ManufacturerCode: req.ManufacturerCode,
		IsSyncedToMall:   req.IsSyncedToMall,
		CatId:            req.CatId,
		GoodsAccountNum:  req.GoodsAccountNum,
		PriceOriginal:    req.PriceOriginal,
		PriceRm:          req.PriceRm,
		Detail:           req.Detail,
	}
	commodity.ID = req.Id
	err = commodity.SetErpCategory()
	if err != nil {
		logger.Error("set erp category err:", logger.Field("err", err))
		app.Error(c, http.StatusInternalServerError, err, "操作失败")
		return
	}
	commodity.IdInit()

	var catCommodity models.ErpCommodity
	err = orm.Eloquent.Table("erp_commodity").Where("id=?", req.Id).Find(&catCommodity).Error
	if err != nil {
		logger.Error("cat erp commodity err:", logger.Field("err", err))
		app.Error(c, http.StatusInternalServerError, err, "操作失败")
		return
	}
	commodity.Number = catCommodity.Number
	commodity.SerialNumber = catCommodity.SerialNumber

	if commodity.ErpCategory != nil && commodity.ErpCategory.ID != 0 {
		if commodity.ErpCategory.ID != catCommodity.ErpCategoryId { // 编辑时更换了分类ID
			commodity.ErpCategoryId = commodity.ErpCategory.ID
			commodity.ErpCategoryName = commodity.ErpCategory.Name
			commodity.SerialNumber, err = models.GenerateSerialNumber(commodity.ErpCategoryId) // 更新商品编号
			if err != nil {
				app.Error(c, http.StatusInternalServerError, err, err.Error())
				return
			}
		} else {
			commodity.ErpCategory = nil
		}
	}

	if req.IsIMEI == 2 { // 是否串码：1-串码类 2-非串码
		commodity.IMEIType = 1 // 系统生成串码：2-是（系统生成） 3-否（手动添加） 1表示非串码
	}

	var sysIsIMEI uint32
	switch catCommodity.IMEIType {
	case 1:
		sysIsIMEI = 2 // 非串码
	case 2:
		fallthrough
	case 3:
		sysIsIMEI = 1 // 串码
	}

	if req.IsIMEI != sysIsIMEI {
		// 查询是否有库存
		var count int64
		err = orm.Eloquent.Table("erp_stock_commodity").Where("erp_commodity_id = ? and state = ?",
			commodity.ID, models.InStock).Count(&count).Error
		if err != nil {
			app.Error(c, http.StatusInternalServerError, err, "获取商品库存信息失败")
			return
		}

		if count > 0 {
			app.Error(c, http.StatusInternalServerError, err, "该商品已有库存，不能修改串码/非串码选项")
			return
		}
	}

	begin := orm.Eloquent.Begin()
	if req.IsSyncedToMall == 1 { // 同步到小程序商城
		commodity.SaleStatus = catCommodity.SaleStatus
		commodity.GoodsId = catCommodity.GoodsId
		if catCommodity.GoodsId != 0 { // 已经同步过，则更新
			err = UpdateMallGoodsName(begin, catCommodity.GoodsId, req)
			if err != nil {
				begin.Rollback()
				app.Error(c, http.StatusInternalServerError, err, err.Error())
				return
			}
		} else { // 未同步过，则新增
			goodsId, err := CreateMallGoods(begin, req)
			if err != nil {
				begin.Rollback()
				app.Error(c, http.StatusInternalServerError, err, err.Error())
				return
			}
			commodity.GoodsId = goodsId

			//更新 Goods.ErpCommodityId
			if err = begin.Model(&models.Goods{}).
				Where("goods_id = ?", goodsId).
				Update("erp_commodity_id", commodity.ID).Error; err != nil {
				begin.Rollback()
				app.Error(c, http.StatusInternalServerError, err, "更新商城商品编号失败")
				return
			}
		}
	} else { // 未同步到小程序商城
		if catCommodity.GoodsId != 0 { // 之前同步了，现在不同步；则删除
			err = DeleteMallGoods(begin, catCommodity.GoodsId)
			if err != nil {
				begin.Rollback()
				app.Error(c, http.StatusInternalServerError, err, err.Error())
				return
			}
		}
	}

	err = begin.Omit("created_at").Save(commodity).Error
	if err != nil {
		logger.Error("create commodity err:", logger.Field("err", err))
		app.Error(c, http.StatusInternalServerError, err, "操作失败")
		return
	}

	// 同步更新库存表和库存商品表的"指导零售价"和"最低零售价"、"分类id"、"分类名称"、"商品编号"；库存商品表的"商品条码"
	err = models.UpdateErpStockAmountInfo(begin, req, barCode, commodity.SerialNumber, commodity.ErpCategory)
	if err != nil {
		begin.Rollback()
		logger.Error("UpdateErpStockAmountInfo err:", logger.Field("err", err))
		app.Error(c, http.StatusInternalServerError, err, "操作失败")
		return
	}

	err = begin.Commit().Error
	if err != nil {
		logger.Error("commit err:", logger.Field("err", err))
		app.Error(c, http.StatusInternalServerError, err, "操作失败")
		return
	}

	app.OK(c, commodity, "")
	return
}

// CommodityDel 删除商品
// @Summary 删除商品
// @Tags 商品资料
// @Produce json
// @Accept json
// @Param request body  models.CommodityDelRequest true "删除商品模型"
// @Success 200 {object} app.Response
// @Router /api/v1/commodity/delete [post]
func CommodityDel(c *gin.Context) {
	var req = new(models.CommodityDelRequest)

	if err := c.ShouldBindJSON(&req); err != nil {
		//logger.Error(err)
		app.Error(c, http.StatusBadRequest, errors.New("para err"), "参数错误")
		return
	}

	// 检查商品是否存在
	if !models.IsExistingCommodity(req.ErpCommodityId) {
		app.Error(c, http.StatusInternalServerError, errors.New("该商品不存在"), "该商品不存在")
		return
	}

	// 删除商品之前需要判断该商品是否有库存
	if models.CheckCommodityIsHavaStock(req.ErpCommodityId) {
		app.Error(c, http.StatusInternalServerError, errors.New("该商品有库存不可删除"), "该商品有库存不可删除")
		return
	}

	begin := orm.Eloquent.Begin()

	// 查询商品
	var waitDeleteCommodity models.ErpCommodity
	err := begin.Model(&models.ErpCommodity{}).Where("id = ?", req.ErpCommodityId).First(&waitDeleteCommodity).Error
	if err != nil {
		app.Error(c, http.StatusInternalServerError, err, "未找到对应的商品")
		return
	}
	// 同步删除小程序商城商品
	if waitDeleteCommodity.GoodsId != 0 { // 之前同步了，现在不同步；则删除
		err = DeleteMallGoods(begin, waitDeleteCommodity.GoodsId)
		if err != nil {
			begin.Rollback()
			app.Error(c, http.StatusInternalServerError, err, err.Error())
			return
		}
	}

	// 删除商品资料
	err = begin.Table("erp_commodity").Where("id=?", req.ErpCommodityId).Delete(&models.ErpCommodity{}).Error
	if err != nil {
		begin.Rollback()
		app.Error(c, http.StatusInternalServerError, err, "获取失败")
		return
	}

	err = begin.Commit().Error
	if err != nil {
		logger.Error("delete err:", logger.Field("err", err))
		app.Error(c, http.StatusInternalServerError, err, "操作失败")
		return
	}

	app.OK(c, nil, "删除成功")
	return
}

// CommodityImportView 导入商品资料预览
// @Summary 导入商品资料预览
// @Tags 商品资料
// @Produce json
// @Accept json
// @Param file body string true "上传excel文件"
// @Success 200 {array} models.CommodityExcel
// @Router /api/v1/commodity/import_commodity_view [post]
func CommodityImportView(c *gin.Context) {
	file, header, err := c.Request.FormFile("file")
	if err != nil {
		//logger.Error("form file err:", err)
		app.Error(c, http.StatusInternalServerError, err, "预览失败")
		return
	}

	readAll, err := io.ReadAll(file)
	if err != nil {
		//logger.Error("read all err:", err)
		app.Error(c, http.StatusInternalServerError, err, "预览失败")
		return
	}

	fmt.Println("header:", header.Filename)
	_, colsMap, err := models.FileExcelReader([]byte(readAll), nil)
	if err != nil {
		//logger.Error("file excel reader err:", err)
		app.Error(c, http.StatusInternalServerError, err, "预览失败")
		return
	}
	fmt.Println("colsMap:", colsMap)
	if len(colsMap) != 0 {
		colsMap = colsMap[1:]
	}

	app.OK(c, &colsMap, "")
	return
}

// CommodityImport 导入商品资料
// @Summary 导入商品资料
// @Tags 商品资料
// @Produce json
// @Accept json
// @Param file body string true "上传excel文件"
// @Success 200 {object} app.Response
// @Router /api/v1/commodity/import_commodity [post]
func CommodityImport(c *gin.Context) {
	file, header, err := c.Request.FormFile("file")
	if err != nil {
		//logger.Error("form file err:", err)
		app.Error(c, http.StatusInternalServerError, err, "预览失败")
		return
	}

	readAll, err := io.ReadAll(file)
	if err != nil {
		//logger.Error("read all err:", err)
		app.Error(c, http.StatusInternalServerError, err, "预览失败")
		return
	}

	fmt.Println("header:", header.Filename)
	_, colsMap, err := models.FileExcelImport(c, []byte(readAll), nil, 2, 0)
	if err != nil {
		//logger.Error("file excel reader err:", err)
		app.Error(c, http.StatusInternalServerError, err, err.Error())
		return
	}
	fmt.Println("colsMap:", colsMap)
	if len(colsMap) != 0 {
		colsMap = colsMap[1:]
	}

	err = models.ImportCommodityData(colsMap, middleware.GetCooperativeBusinessId(c))
	if err != nil {
		//logger.Error("file excel reader err:", err)
		app.Error(c, http.StatusInternalServerError, err, err.Error())
		return
	}

	app.OK(c, nil, "导入成功")
	return
}

// CommodityBatchSaleStatus 批量上架/下架商品
// @Summary 批量上架/下架商品
// @Tags 商品资料
// @Produce json
// @Accept json
// @Param request body models.CommodityBatchSaleStatusRequest true "批量上架/下架模型"
// @Success 200 {object} app.Response
// @Router /api/v1/commodity/batch_sale_status [post]
func CommodityBatchSaleStatus(c *gin.Context) {
	var req = new(models.CommodityBatchSaleStatusRequest)
	if err := c.ShouldBindJSON(&req); err != nil {
		app.Error(c, http.StatusBadRequest, errors.New("para err"), "参数错误")
		return
	}

	if len(req.ErpCommodityIds) == 0 {
		app.Error(c, http.StatusBadRequest, errors.New("empty ids"), "未选择任何商品")
		return
	}
	if req.SaleStatus != 1 && req.SaleStatus != 2 {
		app.Error(c, http.StatusBadRequest, errors.New("invalid status"), "sale_status 必须为 1 或 2")
		return
	}

	// 1. 查询 ERP 商品（无需事务）
	var commodities []models.ErpCommodity
	if err := orm.Eloquent.Model(&models.ErpCommodity{}).
		Select("id, name, goods_id, is_synced_to_mall, sale_status").
		Where("id IN (?)", req.ErpCommodityIds).
		Find(&commodities).Error; err != nil {
		app.Error(c, http.StatusInternalServerError, err, "查询商品失败")
		return
	}

	if len(commodities) == 0 {
		app.Error(c, http.StatusBadRequest, errors.New("not found"), "未找到对应商品")
		return
	}

	var updateCommodityIDs []uint32
	var updateGoodsIDs []uint32

	for _, item := range commodities {
		// 判断是否同步到小程序商城
		if item.IsSyncedToMall != 1 || item.GoodsId == 0 {
			app.Error(c, http.StatusBadRequest, fmt.Errorf("id=%d not synced", item.ID),
				fmt.Sprintf("商品[%s],id=%d 未同步至商城，无法操作", item.Name, item.ID))
			return
		}
		// 已经是目标状态的商品跳过
		if item.SaleStatus == uint32(req.SaleStatus) {
			continue
		}
		updateCommodityIDs = append(updateCommodityIDs, item.ID)
		updateGoodsIDs = append(updateGoodsIDs, item.GoodsId)
	}

	if len(updateCommodityIDs) == 0 {
		app.OK(c, nil, "没有需要更新的商品")
		return
	}

	// 2. 开启事务进行分批更新
	tx := orm.Eloquent.Begin()
	if tx.Error != nil {
		app.Error(c, http.StatusInternalServerError, tx.Error, "数据库错误")
		return
	}

	batchSize := 200

	// 分批更新 ERP 商品 sale_status
	for i := 0; i < len(updateCommodityIDs); i += batchSize {
		end := i + batchSize
		if end > len(updateCommodityIDs) {
			end = len(updateCommodityIDs)
		}
		if err := tx.Model(&models.ErpCommodity{}).
			Where("id IN (?)", updateCommodityIDs[i:end]).
			Update("sale_status", req.SaleStatus).Error; err != nil {
			tx.Rollback()
			app.Error(c, http.StatusInternalServerError, err, "更新 ERP 商品失败")
			return
		}
	}

	// 分批更新 Goods sale_status
	for i := 0; i < len(updateGoodsIDs); i += batchSize {
		end := i + batchSize
		if end > len(updateGoodsIDs) {
			end = len(updateGoodsIDs)
		}
		if err := tx.Model(&models.Goods{}).
			Where("goods_id IN (?)", updateGoodsIDs[i:end]).
			Update("sale_status", req.SaleStatus).Error; err != nil {
			tx.Rollback()
			app.Error(c, http.StatusInternalServerError, err, "更新 Goods 表失败")
			return
		}
	}

	if err := tx.Commit().Error; err != nil {
		app.Error(c, http.StatusInternalServerError, err, "提交失败")
		return
	}

	app.OK(c, nil, "操作成功")
}