package service

import (
	"errors"
	"hospital-admin-api/api/dao"
	"hospital-admin-api/api/dto"
	"hospital-admin-api/api/model"
	"hospital-admin-api/api/requests"
	"hospital-admin-api/extend/prescription"
	"hospital-admin-api/global"
	"hospital-admin-api/utils"
	"strconv"
)

type ProductService struct {
}

// GetProductPlatform 平台商品详情
func (r *ProductService) GetProductPlatform(productPlatformId int64) (g *dto.ProductPlatformDto, err error) {
	// 获取平台商品数据
	productPlatformDao := dao.ProductPlatformDao{}
	productPlatform, err := productPlatformDao.GetProductPlatformById(productPlatformId)
	if err != nil || productPlatform == nil {
		return nil, errors.New(err.Error())
	}

	// 获取商品库存
	var quantity int

	ReportPreRequest := prescription.GetProdStockRequest{
		DrugCode: productPlatform.ProductPharmacyCode,
	}

	result, err := ReportPreRequest.GetProdStock()
	if err != nil {
		quantity = 0
	}

	if result != nil {
		if result.Quantity != "" {
			quantity, err = strconv.Atoi(result.Quantity)
			if err != nil {
				quantity = 0
			}
		}
	}

	// 处理返回值
	g = dto.GetProductPlatformDto(productPlatform)

	// 加载商品库存
	g.LoadProductAmount(quantity)
	return g, nil
}

// GetProduct 商品详情
func (r *ProductService) GetProduct(productId int64) (g *dto.ProductDto, err error) {
	// 获取商品数据
	productDao := dao.ProductDao{}
	product, err := productDao.GetProductById(productId)
	if err != nil || product == nil {
		return nil, errors.New(err.Error())
	}

	// 获取商品库存数据
	productPlatformAmountDao := dao.ProductPlatformAmountDao{}
	productPlatformAmount, err := productPlatformAmountDao.GetProductPlatformAmountByProductPlatformId(product.ProductPlatformId)

	// 处理返回值
	g = dto.GetProductDto(product)

	if productPlatformAmount != nil {
		// 加载库存
		g.LoadProductAmount(productPlatformAmount)
	}

	return g, nil
}

// AddProduct 新增商品
func (r *ProductService) AddProduct(userId string, req requests.AddProduct) (bool, error) {
	productDao := dao.ProductDao{}
	productPlatformAmountDao := dao.ProductPlatformAmountDao{}

	productPlatformId, err := strconv.ParseInt(req.ProductPlatformId, 10, 64)
	if err != nil {
		return false, errors.New("新增失败")
	}

	// 检测平台商品是否存在
	productPlatformDao := dao.ProductPlatformDao{}
	productPlatform, err := productPlatformDao.GetProductPlatformById(productPlatformId)
	if err != nil || productPlatform == nil {
		return false, errors.New("平台商品不存在")
	}

	// 检测商品是否重复
	maps := make(map[string]interface{})
	maps["product_platform_id"] = req.ProductPlatformId
	products, err := productDao.GetProductList(maps)
	if err != nil {
		return false, errors.New("商品重复添加")
	}

	if len(products) != 0 {
		return false, errors.New("商品重复添加")
	}

	// 处理图片
	productCoverImg := utils.RemoveOssDomain(req.ProductCoverImg)

	// 开始事务
	tx := global.Db.Begin()
	defer func() {
		if r := recover(); r != nil {
			tx.Rollback()
		}
	}()

	// 新增商品表
	product := &model.Product{
		ProductPlatformId:   productPlatform.ProductPlatformId,
		ProductStatus:       *req.ProductStatus,
		ProductName:         req.ProductName,
		CommonName:          req.CommonName,
		ProductPrice:        req.ProductPrice,
		MnemonicCode:        req.MnemonicCode,
		ProductType:         *req.ProductType,
		ProductPlatformCode: req.ProductPlatformCode,
		ProductPharmacyCode: req.ProductPharmacyCode,
		ProductCoverImg:     productCoverImg,
		ProductSpec:         req.ProductSpec,
		LicenseNumber:       req.LicenseNumber,
		Manufacturer:        req.Manufacturer,
		SingleUnit:          req.SingleUnit,
		SingleUse:           req.SingleUse,
		PackagingUnit:       req.PackagingUnit,
		FrequencyUse:        req.FrequencyUse,
		AvailableDays:       req.AvailableDays,
		ProductRemarks:      req.ProductRemarks,
	}

	product, err = productDao.AddProduct(tx, product)
	if err != nil || product == nil {
		tx.Rollback()
		return false, errors.New(err.Error())
	}

	// 获取商品库存
	ReportPreRequest := prescription.GetProdStockRequest{
		DrugCode: product.ProductPharmacyCode,
	}

	result, err := ReportPreRequest.GetProdStock()
	if err != nil {
		tx.Rollback()
		return false, errors.New("获取商品库存失败")
	}

	var quantity int
	if result.Quantity != "" {
		quantity, err = strconv.Atoi(result.Quantity)
		if err != nil {
			tx.Rollback()
			return false, errors.New("获取商品库存失败")
		}
	}

	// 新增商品库存
	productPlatformAmount := &model.ProductPlatformAmount{
		ProductPlatformId:   product.ProductPlatformId,
		ProductPlatformCode: product.ProductPlatformCode,
		Stock:               uint(quantity),
	}

	productPlatformAmount, err = productPlatformAmountDao.AddProductPlatformAmount(tx, productPlatformAmount)
	if err != nil || productPlatformAmount == nil {
		tx.Rollback()
		return false, errors.New(err.Error())
	}

	tx.Commit()
	return true, nil
}

// PutProduct 修改商品
func (r *ProductService) PutProduct(productId int64, req requests.PutProduct) (bool, error) {
	// 获取商品数据
	productDao := dao.ProductDao{}
	product, err := productDao.GetProductById(productId)
	if err != nil || product == nil {
		return false, errors.New("商品数据错误")
	}

	productData := make(map[string]interface{}) // 医生数据

	// 商品助记码
	if product.MnemonicCode != req.MnemonicCode {
		productData["mnemonic_code"] = req.MnemonicCode
	}

	// 单次剂量
	if product.SingleUnit != req.SingleUnit {
		productData["single_unit"] = req.SingleUnit
	}

	// 单次用法
	if product.SingleUse != req.SingleUse {
		productData["single_use"] = req.SingleUse
	}

	// 基本包装单位
	if product.PackagingUnit != req.PackagingUnit {
		productData["packaging_unit"] = req.PackagingUnit
	}

	// 使用频率
	if product.FrequencyUse != req.FrequencyUse {
		productData["frequency_use"] = req.FrequencyUse
	}

	// 可用天数
	if product.AvailableDays != req.AvailableDays {
		productData["available_days"] = req.AvailableDays
	}

	// 商品备注
	if product.ProductRemarks != req.ProductRemarks {
		productData["product_remarks"] = req.ProductRemarks
	}

	// 商品封面
	if req.ProductCoverImg != "" {
		productCoverImg := utils.RemoveOssDomain(req.ProductCoverImg)
		if product.ProductCoverImg != productCoverImg {
			productData["product_cover_img"] = productCoverImg
		}
	}

	// 开始事务
	tx := global.Db.Begin()
	defer func() {
		if r := recover(); r != nil {
			tx.Rollback()
		}
	}()

	// 修改商品数据
	if len(productData) != 0 {
		err = productDao.EditProductByUserId(tx, productId, productData)
		if err != nil {
			tx.Rollback()
			return false, errors.New("修改失败")
		}
	}

	tx.Commit()
	return true, nil
}

// PutProductStatus 修改商品状态（上/下架）
func (r *ProductService) PutProductStatus(productId int64, req requests.PutProductStatus) (bool, error) {
	// 获取商品数据
	productDao := dao.ProductDao{}
	product, err := productDao.GetProductById(productId)
	if err != nil || product == nil {
		return false, errors.New("商品数据错误")
	}

	if product.ProductStatus == *req.ProductStatus {
		return true, nil
	}

	// 商品数据
	productData := make(map[string]interface{}) // 医生数据
	productData["product_status"] = req.ProductStatus

	// 开始事务
	tx := global.Db.Begin()
	defer func() {
		if r := recover(); r != nil {
			tx.Rollback()
		}
	}()

	// 修改商品数据
	if len(productData) != 0 {
		err = productDao.EditProductByUserId(tx, productId, productData)
		if err != nil {
			tx.Rollback()
			return false, errors.New("操作失败")
		}
	}

	tx.Commit()
	return true, nil
}