public without sharing class ProRegisterHandler {

	public static void updateProduct(List<Product_Register__c> newList, Map<Id, Product_Register__c> newMap, List<Product_Register__c> oldList, Map<Id, Product_Register__c> oldMap) {

		// 产品-注册证关系 中所有 产品ID
		List<ID> Product2_ID_list = new list<ID>();
		// 现有产品 map
		Map<ID, Product2> Exist_ProductMap = new map<ID, Product2>();
		// 需要更新产品 list
		List<Product2> UpdateProductlist = new list<Product2>();
		// 根据变更的证ID找到关联的所有的产品
		list<Product_Register_Link__c> ExistPRLList = [select Product2__c,
		                               Product_Register__c
		                               from Product_Register_Link__c
		                               where Product_Register__c in: newList
		                                              ];

		for (Product_Register_Link__c PRL : ExistPRLList) {
			// 产品ID的LIST
			Product2_ID_list.add(PRL.Product2__c);
		}

		// 通过产品ID找到该产品最新注册证ID
		Exist_ProductMap = new Map<ID, Product2> ([select ID, Register_Latest__c, registrationCode__c, clinical_product_code__c
		        from Product2
		        where id in: Product2_ID_list
		                                          ]);

		// 通过产品ID找到所有涉及的有效关系
		List<Product_Register_Link__c> allPRLList = [select Product2__c,
		                               Product_Register__c,
		                               Product_Register__r.PrdCompanyAddr__c,
		                               Product_Register__r.ValidFrom__c,
		                               Product_Register__r.ValidTo__c,
		                               Product_Register__r.Name,
		                               Product_Register__r.ValidProductRegister__c,
		                               Product_Register__r.ClinicalProductCode__c
		                               from Product_Register_Link__c
		                               where Product2__c in : Product2_ID_list
		                               order by Product2__c,
		                               LastModifiedDate desc
		                                            ];

		String tmpProductID = '';
		Product2 temProduct = new Product2();
		Map<Id, Product2> UpdProMap = new Map<Id, Product2>();

		for (Product_Register_Link__c temPRL : allPRLList) {

			if (!tmpProductID.equals(temPRL.Product2__c)) {

				tmpProductID = temPRL.Product2__c;
				temProduct = Exist_ProductMap.get(tmpProductID);
				temProduct.Register_Latest__c = temPRL.Product_Register__c;                    // 最新注册证ID
				temProduct.registrationCode__c = null;
				temProduct.clinical_product_code__c = null;
			}

			// 如果注册证状态有效,记录有效注册证号
			if (temPRL.Product_Register__r.ValidProductRegister__c ) {
				if (String.isBlank(temProduct.registrationCode__c)) {
					temProduct.registrationCode__c = temPRL.Product_Register__r.Name + '\n';
				} else {
					if (String.isNotBlank(temPRL.Product_Register__r.Name)) {
						if (temProduct.registrationCode__c.indexOf(temPRL.Product_Register__r.Name) == -1) {
							temProduct.registrationCode__c += temPRL.Product_Register__r.Name + '\n';
						}
					}
				}

				String clinicalCode = temPRL.Product_Register__r.ClinicalProductCode__c;
				if (String.isBlank(temProduct.clinical_product_code__c)) {
					temProduct.clinical_product_code__c = clinicalCode;//temPRL.Product_Register__r.ClinicalProductCode__c;
				} else {

					if (String.isNotBlank(clinicalCode)) {

						Map<String, String> codeMap = new Map<String, String>();
						for (String code : temProduct.clinical_product_code__c.split('/')) {
							codeMap.put(code, code);
						}
						codeMap.put(clinicalCode, clinicalCode);
						temProduct.clinical_product_code__c = '';
						for (String code : codeMap.values()) {
							if (String.isBlank(temProduct.clinical_product_code__c)) {
								temProduct.clinical_product_code__c = code;
							} else {
								temProduct.clinical_product_code__c += '/' + code;
							}
						}
						
					}

				}
			}
			UpdProMap.put(tmpProductID, temProduct);
		}
		if (UpdProMap.keySet().size() > 0)  update UpdProMap.values();
	}

	//用于降类,产品注册证更新了,就把产品注册证下的产品的等级类别字段赋空,触发产品的触发器
	public static void checkRegistervervaldatum(List<Product_Register__c> newList, Map<Id, Product_Register__c> newMap, List<Product_Register__c> oldList, Map<Id, Product_Register__c> oldMap) {
		List<String> prcList = new List<String>();
		for (Product_Register__c pr : newList) {
			Product_Register__c oldpr = oldMap.get(pr.Id);
			    prcList.add(pr.id);
		}
		//放到Map里，用于注册证更新产品
		Map<Id,Product2> prt2Map = new Map<Id,Product2>();
		//通过之前存储的Id用于关系表的查询。
		List<Product_Register_Link__c> prlList = new List<Product_Register_Link__c>();
		prlList = [select Product2__r.id,Product2__r.demoteer_Sap__c,Product2__r.Diedatvanink__c,Product_Register__r.MedPrdClass__c,Product_Register__r.Stelsedag__c,Product_Register__r.ValidTo__c,Product_Register__r.ValidFrom__c 
		from Product_Register_Link__c 
        where Product_Register__r.Id in : prcList];

        List<ID> proIdList = new List<ID>();
        for (Product_Register_Link__c prl: prlList) {
        	proIdList.add(prl.Product2__r.id);
        }
        
        List<Product2> por2Lsit = new List<Product2>();
	    //查出产品的id和等级类别的字段 
	    por2Lsit = [select Id,Level_Category__c from Product2 where Id in : proIdList];
	    for (Product2 pro: por2Lsit) {
	    	pro.Level_Category__c = null;
	    	prt2Map.put(pro.Id, pro);
	    }
	    System.debug('prt2Map='+prt2Map);
        if (prt2Map.size() > 0) {
           update prt2Map.values(); 
        } 
	}
}