Salesforce Sales order trigger for CRM systems

Trigger Salesordertrigger on Salesorder__c (before Insert,before update,after insert) {Salesorder__c SalesOrder = Tri
    GGER.NEW[0];
    Account A = new account (); if (Trigger.isinsert&&trigger.isbefore) {if (salesorder.customer__c!=null) {a = [SELECT id,te Chnologicalrequirements1__c,customer_status__c, industry, Material_type2__c, Name, Phone__c, Deliveryaddress__c from
            Account WHERE Id =: Salesorder.customer__c]; list<contact> contactlist = [select Id,name,firstname,lastname,mobilephone,phone_number2__c from Contact where
            Accountid=:salesorder.customer__c Limit 1]; If (' not enabled ') equals (A.customer_status__c) &&contactlist.size () <=0) {Salesorder.adderror (' customer has no relevant contact, is not enabled, please maintain and submit approvals in a timely manner.
            '); }else{if (' not enabled '. Equals (A.customer_status__c)) {Salesorder.adderror (' customer status is not enabled, please submit the customer in time Line approval.
                ');
             }else if (' Pending approval '. Equals (A.customer_status__c)}} {        Salesorder.adderror (' Customer status is pending, please wait for approval to complete before you create the customer's order.

                '); }else{if (contactlist.size () >0) {if (String.isnotblank (contactlist[0). FirstName)) {Salesorder.consignee__c = contactlist[0]. Firstname+contactlist[0].
                        LastName; }else{Salesorder.consignee__c = contactlist[0].
                        LastName; } Salesorder.consigneephone__c = Contactlist[0].
                    Phone_number2__c; }else{Salesorder.adderror (' customer does not have the relevant contact person, please timely maintenance.
                    '); }}}}//salesorder.technicsrequiment__c = A.technol
        Ogicalrequirements1__c;
        Salesorder.industrytypes__c = A.industry;
        Salesorder.materialtype__c = A.material_type2__c; if (salesorder.delivery__c== ' home delivery ') {Salesorder.deliveryaddress__c = A.deliveryaDdress__c;
        }else if (salesorder.delivery__c== ' self pickup ') {salesorder.deliveryaddress__c = label.companyaddress; }} if (Trigger.isupdate) {if (salesorder.statue__c== ' 1 ' &&trigger. Oldmap.get (SalesOrder. Id). statue__c== ' 0 ') {a = [SELECT id,technologicalrequirements1__c,customer_status__c, industry, Material_type
            2__c, Name, Phone__c, deliveryaddress__c from account WHERE Id =: Salesorder.customer__c]; If (' not enabled '. Equals (A.customer_status__c)) {Salesorder.adderror (' customer status is not enabled, please submit customer for approval in time.
            '); }else if (' Pending '. Equals (A.customer_status__c)) {Salesorder.adderror (' customer status is pending, please wait for approval to complete before you create the customer's order.

            ');
            } list<attachment> attachmentlist = [select id from Attachment where parentid=:salesorder.id]; list<contentversion> contentversionlist = [SELECT Id from ContentVersion where Firstpublishlocationid=:salesord
            Er.id]; List<contentdocumentlink> cdllist = [SELECT Id, Linkedentityid, Contentdocumentid from Contentdocumentlink where LinkedEntityId
            =:salesorder.id]; if (Attachmentlist.size () <=0&&contentversionlist.size () <=0&&cdllist.size () <=0) {SA Lesorder.adderror (' Sales order submitted for approval, there is no upload contract, three certificates and other information attachments, not allowed to submit approval.
            '); }}}//cross-region alert if (trigger.isafter&&salesorder.statue__c== ' 1 ') {list<customobject5__ C> Userconfig=[select Id,office__c,branch__c,business_area__c,productline__c,user__c,user__r.name,position__c From Customobject5__c WHERE User__c=:salesorder.
        ownerID and Productline__c!=null]; if (Userconfig.size () >0&&salesorder.deliveryplace__c!=null) {set<id> UIds = new SET&LT;ID&G
            t; (); String msg = ' salesman ' + userconfig[0]. User__r.name + ' There are cross-regional sales, please be aware.
            ';
            set<string> uline = new set<string> ();
            Boolean isfp=true; String Salearea = SalEsorder.salearea__c.substring (3,7);//Sales area Region__c reg = [SELECT Name from Region__c WHERE id=:salesorder.de
            Liveryplace__c]; for (Customobject5__c c5:userconfig) {if (!c5.productline__c.contains (Salearea)) {////If the available product line does not include a sales area, it is sold across product lines (not required
                to chatter) ISFP = false; if (c5.position__c== ' branch manager ' | | c5.position__c== ' Domestic trade Director ' | |
                c5.position__c== ' deputy manager of Big account ') {ISFP = false; }else{//Other positions the person across the region chatter to the upper set<string> Bareas = new Set<string> (c5 .
                    Business_area__c.split (';')); for (String s:bareas) {if (reg.  
                    Name.contains (s)) {ISFP = false;//If the address contains a salesperson's sales area is not cross-region (not chatter)} }}} if (ISFP) {List<customobje ct5__c> upper = new list<customobject5__c> (); if (userconfig[0].branch__c== ' Precision/Smart Device branch ') {upper=[select Id,branch__c,user__c,user__r.name,position__c 
                From Customobject5__c WHERE branch__c=:userconfig[0].branch__c and position__c= ' branch manager ' and Productline__c=:salearea]; }else{Upper=[select Id,branch__c,user__c,user__r.name,position__c from Customobject5__c 
                WHERE Branch__c=:userconfig[0].branch__c and position__c= ' branch manager ']; } if (Upper.size () >0) {chattersender.send (upper[0]. User__c,msg,salesorder.
                ID); }    
            }    
        } 
    }   
}