/*
 * Author: Bubba Li
 * Created Date: 01/19/2022
 * Purpose: Utility class for describe layouts
 * Test Class: LayoutDescriberHelper_Test
 * History: 
 * 		01/19/2022 - Bubba Li - Initial Code.
 * 
 * */

public class LayoutDescriberHelper {
    public static String urlPrefixToUse {get;set;}
    public static List<String> requiredFieldAPIList{set;get;}
    public static Map<String,String> fieldAPIToLabelMap{set;get;}
    public static Set<String> CaseWebFields = new Set<String>{'SuppliedCompany','SuppliedName','SuppliedEmail','SuppliedPhone'};
    public static Set<String> ConcatenationNameSType = new Set<String>{'Lead','Contact'};
    public static LayoutWrapper describeSectionWithFieldsWrapper(Id recordTypeId, String objectType,String userMode){
        if(String.isEmpty(recordTypeId)){
            //Assign default record type for sobject
            recordTypeId = getDefaultRecordType(objectType);
        }
        List<LayoutSection> layoutSections = describeSectionWithFields(recordTypeId,objectType,userMode);
        LayoutWrapper layoutWrapperValue = new LayoutWrapper();
        layoutWrapperValue.layoutSections = layoutSections;
        layoutWrapperValue.requiredFieldAPIList = requiredFieldAPIList;
        layoutWrapperValue.fieldAPIToLabelMap = fieldAPIToLabelMap;
        system.debug('required API List:'+JSON.serialize(requiredFieldAPIList));
        return layoutWrapperValue;
    }
    public static List<LayoutSection> describeSectionWithFields(Id recordTypeId, String objectType,String userMode){
        system.debug('record type id ===>'+ recordTypeId+' object type===>'+objectType + ' userMode===>'+userMode);
        List<LayoutSection> layoutSections;
        Map<String,List<LayoutField>> layoutFields;
        requiredFieldAPIList = new List<String>();
        fieldAPIToLabelMap = new Map<String,String>();
        layoutSections = new List<LayoutSection>();
        String theRespBody = getLayoutSchema(recordTypeId, objectType,userMode);      
        Map<String, Object> layoutSection = (Map<String, Object>) JSON.deserializeUntyped(theRespBody);
        Map<String,object> m = new Map<String,object>();
        if(String.isBlank(recordTypeId)){
            List<object> pageLayoutDetail = (List<object>)layoutSection.get('layouts');
            System.debug('Page Layout Section Detail:'+JSON.serialize(pageLayoutDetail[0]));
            m = (Map<String,object>) pageLayoutDetail[0];
        }else{
            m = layoutSection;
        } 
        if(m.containsKey('editLayoutSections')){
            List<object > targetLayout = (List<object>) m.get('editLayoutSections');
            for(object sectionObject: targetLayout){
                Map<String,object> section = (Map<String,object>) sectionObject;
                String sectionH = (String)section.get('heading');
                boolean useH = (boolean)section.get('useHeading');
                integer columns = (integer)section.get('columns');
                boolean useCollapse = (boolean)section.get('useCollapsibleSection');
                LayoutSection ls = new LayoutSection();
                ls.Name = sectionH;
                ls.useHeader = useH;
                ls.columns = columns;
                ls.allowCollapse = useCollapse;
                ls.layoutFields = new List<LayoutField>();                
                layoutSections.add(ls);
                List<object> layoutRows = (List<object>)  section.get('layoutRows');
                system.debug('layout rows ====> '+layoutRows);
                for(Object itemObject : layoutRows ){
                    Map<String,object> item = (Map<String,object>) itemObject;
                    List<object> layoutItem = (List<object>)item.get('layoutItems');
                    boolean priorFieldLayoutAdded = true;//initially true
                    for(object fieldItemObject : layoutItem){
                        Map<String, object> fields = (Map<String,object>) fieldItemObject;
                        List<object> layoutComponents = (List<object>) fields.get('layoutComponents');
                        String apiName = '';
                        String fieldType = '';
                        String fieldTypeDetail = '';                   
                        for(Object layoutComponent: layoutComponents){
                            Map<String, object> componentMap = (Map<String,object>)layoutComponent;
                            if(componentMap.containsKey('value')){
                                apiName = (String) componentMap.get('value');
                            }
                            
                            if(componentMap.containsKey('type')){
                                fieldType = (String) componentMap.get('type');
                            }
                            
                            if(componentMap.containsKey('details')){
                                Map<String,object> detailsMap = (Map<String,object>) componentMap.get('details');
                                boolean calculatedField = (boolean)detailsMap.get('calculated');
                                boolean autoNumberField = (boolean)detailsMap.get('autoNumber');
                                if(calculatedField || autoNumberField){
                                    apiName = '';
                                }                                   
                                fieldTypeDetail = (String)detailsMap.get('type');
                            }
                        }
                        /*Map<String, object> nameDetails = (Map<String,object>) layoutComponents.get('Name');*/
                        String fieldLabel = (String) fields.get('label'); 
                        boolean placeholderF = (boolean) fields.get('placeholder'); 
                        boolean isEditable = (boolean) fields.get('editableForNew'); // Check the editable prop
                        if( (apiName != '' && fieldType =='Field') || (placeholderF)){
                            if(userMode == 'classic' && fieldTypeDetail == 'address'){
                                String fieldLabelPrefix = fieldLabel.split(' ')[0] == 'Address'?'':fieldLabel.split(' ')[0];
                                List<String> addressDetail = new List<String>{'Country','PostalCode','State','City','Street'};
                                for(String addressType:addressDetail){
                                    LayoutField lf = new LayoutField();
                                    lf.isRequired = (Boolean)fields.get('required');
                                    lf.isPlaceHolder = placeholderF;
                                    lf.editableField = isEditable;
                                    lf.fieldAPI = fieldLabelPrefix+addressType;
                                    
                                    lf.fieldLabel = fieldLabelPrefix+' '+addressType;
                                    lf.fieldType = 'string';                                 
                                    if(ls.Name != '' || layoutSections.size() == 1){
                                        ls.layoutFields.add(lf);
                                    }else if(layoutSections.size() - 2 >= 0){
                                        layoutSections.get(layoutSections.size() - 2).layoutFields.add(lf); 
                                    }
                                    if(lf.isRequired){
                                        system.debug(lf.fieldAPI+' is required');
                                        requiredFieldAPIList.add(lf.fieldAPI);
                                    }
                                    if(string.isBlank(lf.fieldAPI)){
                                        system.debug('==================================2');
                                        continue;
                                    }else{
                                        fieldAPIToLabelMap.put(lf.fieldAPI,lf.fieldLabel);
                                    }
                                }
                                continue;
                            }
                            if(userMode == 'classic' && apiName == 'Name' && ConcatenationNameSType.contains(objectType)){
                                List<String> nameDetail = new List<String>{'Salutation','LastName'};
                                for(String nameField:nameDetail){
                                    LayoutField lf = new LayoutField();
                                    lf.isRequired = (Boolean)fields.get('required');
                                    if(nameField == 'Salutation'){
                                        lf.isRequired = false;
                                    }
                                    lf.isPlaceHolder = placeholderF;
                                    lf.editableField = isEditable;
                                    lf.fieldAPI = nameField;
                                    lf.fieldLabel = nameField;
                                    lf.fieldType = 'string';
                                    if(ls.Name != '' || layoutSections.size() == 1){
                                        ls.layoutFields.add(lf);
                                    }else if(layoutSections.size() - 2 >= 0){
                                        layoutSections.get(layoutSections.size() - 2).layoutFields.add(lf); 
                                    }
                                    if(lf.isRequired){
                                        system.debug(lf.fieldAPI+' is required');
                                        requiredFieldAPIList.add(lf.fieldAPI);
                                    }                                      
                                    if(string.isBlank(lf.fieldAPI)){
                                        system.debug('==================================3');
                                        continue;
                                    }else{
                                        fieldAPIToLabelMap.put(lf.fieldAPI,lf.fieldLabel);
                                    }
                                }
                                continue;
                            }
                            if(objectType == 'Case' && CaseWebFields.contains(apiName)){
                                continue;
                            }
                            LayoutField lf = new LayoutField();
                            lf.isRequired = (Boolean)fields.get('required');
    						lf.isPlaceHolder = placeholderF;
                            lf.editableField = isEditable;
                            lf.fieldAPI = apiName;
                            lf.fieldLabel = fieldLabel;
                            lf.fieldType = fieldTypeDetail;
    						if(ls.Name != '' || layoutSections.size() == 1){
                                ls.layoutFields.add(lf);
                            }else if(layoutSections.size() - 2 >= 0){
                                layoutSections.get(layoutSections.size() - 2).layoutFields.add(lf);
                            }
                            if(lf.isRequired){
                                system.debug(lf.fieldAPI+' is required');
                                requiredFieldAPIList.add(lf.fieldAPI);
                            }
                            if(string.isBlank(lf.fieldAPI)){
                                system.debug('==================================1');
                                continue;
                            }else{
                                fieldAPIToLabelMap.put(lf.fieldAPI,lf.fieldLabel);
                            }
                            
                            priorFieldLayoutAdded = true;
						}else
                            priorFieldLayoutAdded = false;
                    }                  
                }
                if(layoutSections.get(layoutSections.size() -1).layoutFields.size() <= 0) {
                    layoutSections.remove(layoutSections.size() - 1);
                }                
            }
        }
        System.debug('Layout Section Result:'+JSon.serialize(layoutSections));
        system.debug('required API List:'+JSON.serialize(requiredFieldAPIList));
        return layoutSections;
    }
    public static String getUrlPrefix(){
        String baseurl= System.URL.getOrgDomainUrl().getHost();
        system.debug('original url ===>'+ baseurl);
        return baseurl;
    }

    public static String getLayoutSchema(Id recordTypeId, String objectType,String userMode){
        String urlPost = '/services/data/v53.0/sobjects/'+objectType+'/describe/layouts/';
        if(String.isNotEmpty(recordTypeId) && String.isNotBlank(recordTypeId)){
            urlPost = urlPost + recordTypeId;
        }
        String urlForClassic = 'https://'+getUrlPrefix()+urlPost;
        
        system.debug('URL Post:'+urlForClassic);
        HttpResponse resp = null;
        HttpRequest req = new HttpRequest();         
        req.setMethod('GET');        
        if(userMode =='lightning'){
            req.setEndPoint('callout:SF_Rest_API'+urlPost);
            system.debug('callout:SF_Rest_API'+urlPost);
        }else if(userMode == 'classic'){
            req.setEndpoint(urlForClassic); 
            req.setHeader('Authorization', 'Bearer ' + UserInfo.getsessionid());
        }       
        Http client = new Http();    
        resp = client.send(req);
        system.debug('Schema Body:'+JSON.serialize(resp.getBody()));
        return resp.getBody();
    }

    public static Id  getDefaultRecordType(String ObjectName) {
        Map<String, Schema.SObjectType> GlobalDescribeMap = Schema.getGlobalDescribe();
        Schema.SObjectType obj = GlobalDescribeMap.get(ObjectName);
        Schema.DescribeSObjectResult describeResult = obj.getDescribe();
        List<Schema.RecordTypeInfo> rtInfos = describeResult.getRecordTypeInfos();
        for(Schema.RecordTypeInfo rtInfo : rtInfos) {
            if(rtInfo.DefaultRecordTypeMapping) {              
                return  rtInfo.getRecordTypeId();    
            }
        }
        return null;
    }
    public class LayoutWrapper{
        @AuraEnabled public List<LayoutSection> layoutSections{set;get;}
        @AuraEnabled public List<String> requiredFieldAPIList{set;get;}
        @AuraEnabled public Map<String,String> fieldAPIToLabelMap{set;get;}
    }
    public class LayoutSection{
        @AuraEnabled public boolean useHeader {get;set;}
        @AuraEnabled public String name {get;set;}
        @AuraEnabled public boolean allowCollapse {get;set;}  
        @AuraEnabled public integer columns {get;set;}
        @AuraEnabled public List<LayoutField> layoutFields {get;set;}
    }
    
    public class LayoutField{         
        @AuraEnabled public String fieldAPI {get;set;}
        @AuraEnabled public String fieldLabel{set;get;}
        @AuraEnabled public String fieldType{set;get;}
        @AuraEnabled public boolean editableField {get;set;}
        @AuraEnabled public boolean isRequired {get; set;}
        @AuraEnabled public boolean isPlaceHolder {get;set;}      
        @AuraEnabled public String defaultValue{set;get;}      
    }
}