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/**
 * @NApiVersion 2.x
 * @NScriptType UserEventScript
 */

define(['N/record', 'N/error', 'N/email', 'N/render', 'N/runtime', 'N/ui/serverWidget', 'N/search'], function(record, error, email, render, runtime, ui, search) {
  
    function beforeSubmit(context) {
        if (context.type === context.UserEventType.CREATE || context.type === context.UserEventType.EDIT) {
            var noClass = false;
            var listClassCount = context.newRecord.getLineCount({ sublistId: 'item' });
            var hasNoClass = [];
            for (var i = 0; i < listClassCount; i++) {
                var itemId = context.newRecord.getSublistValue({ sublistId: 'item', fieldId: 'item', line: i });
                var itemClass = search.lookupFields({ type: 'item', id: itemId, columns: 'class' });
                if (!itemClass.class) {
                    noClass = true;
                    hasNoClass.push(context.newRecord.getSublistText({ sublistId: 'item', fieldId: 'item', line: i }));
                }
            }
          
            if (noClass) {
                var errorMessage = 'The following items do not belong to any class: ' + hasNoClass.join(', ') + '. Kindly check the following items.';
                throw error.create({ name: 'NOCLASSITEM', message: errorMessage, notifyOff: true });
            }
        }
    }
  
    function afterSubmit(context) {
        if (context.type === context.UserEventType.CREATE || context.type === context.UserEventType.EDIT) {
            var currentRecord = context.newRecord;
            var salesOrderId = currentRecord.id;
            
            // Rest of the code for sending email and adding button remains unchanged
        }
    }
  
    return {
        beforeSubmit: beforeSubmit,
        afterSubmit: afterSubmit
    };
});