define(['N/record', 'N/search', 'N/error', 'N/log', 'N/ui/dialog'],
    function (record, search, error, log, dialog) {

        function lineItemValidation(context) {
            var currentRecord = context.currentRecord;

            var class = currentRecord.getCurrentSublistValue({
                sublistId: 'line',
                fieldId: 'class',
            });
            alert("class: " + class)

            if (!class || class == 'undefined' || class == "") {
                var account_id = currentRecord.getCurrentSublistValue({
                    sublistId: 'line',
                    fieldId: 'account'
                });
                alert("Account ID: " + account_id)

                if (account_id) {
                    var acc_type = search.lookupFields({
                        type: search.Type.ACCOUNT,
                        id: account_id,
                        columns: ['type']
                    });
                    var acc_type_val = acc_type.type[0].value;
                    alert("Lookup Account Type Value : " + acc_type_val);
                }

                /**Screen Messages**/
                var required_class_message = {
                    title: 'Field Required',
                    message: 'Please enter a Class.'
                };

                if (acc_type_val) {
                    alert("Requires Validation...")
                    var acc_type_validation_required = nsfGetAccountType(acc_type_val);
                    if (acc_type_validation_required == true) {
                        dialog.alert(required_class_message);
                        return false;
                    }
                    return true;
                }
            }
            return true;
        }
  	
  		function nsfGetAccountType(acc_type) {
          if(acc_type) {
            var found = false;
            switch (acc_type) {
                case "Income":
                found = true;
                break;
              default: break;
            }
          }
          return found;
        }
  
        return {
            validateLine: lineItemValidation
        };
    });