/**
* ─────────────────────────────────────────────────────────────────────────────────────────────────┐
* This Batch class is use to get inventory Levels from the Shopify and upsert into the Salesforce.
* Shopify API Documentation: https://shopify.dev/docs/admin-api/rest/reference
* Create Shopify Store: https://www.shopify.com/signup?itcat=identity&itterm=create-new-store
* Shopify API Release 2020: https://www.shopify.in/partners/blog/shopify-api-release-january-2020
* What is Person Account in Salesforce ? https://help.salesforce.com/articleView?id=account_person.htm&type=5
* ──────────────────────────────────────────────────────────────────────────────────────────────────
* @author         Sumit    <sumit@hicShopify.com>
* ────────────────────────────────────────────────────────────────────────────────────────────────── 
*/
global with sharing class FetchInventoryLevels implements Database.Batchable<sObject>, Database.AllowsCallouts, Database.Stateful{
    List<HIC_ShopifySync__Location__c> locationsList = new List<HIC_ShopifySync__Location__c>();
    String inventoryLevelResponse;
    String linkForNextPage = '';
    Boolean isEnd = false;
    List<Object> objectList;
    List<Object> objectListToPass;
    Set <Id> locationIds;
    string locationId;
    boolean flag;
    String store = 'Default';    
    String updated_at_min = '';
    String updated_at_max = '';
    
    public List<HIC_ShopifySync__HIC_Configuration__c >  configurationList = new List<HIC_ShopifySync__HIC_Configuration__c >();
    

    global FetchInventoryLevels(String linkForNextPage, string locationId, String store){
        this.linkForNextPage = linkForNextPage;
        this.locationId = locationId;
        this.store = store;
    }  
    global FetchInventoryLevels(String linkForNextPage, string locationId, String store, String updated_at_min, String updated_at_max){
        this.linkForNextPage = linkForNextPage;
        this.locationId = locationId;
        this.store = store;        
        this.updated_at_min = updated_at_min;
        this.updated_at_max = updated_at_max;
    }   

    //Depreceated
    global FetchInventoryLevels(String linkForNextPage, string locationId){
        this.linkForNextPage = linkForNextPage;
        this.locationId = locationId;
    }  
    
    global FetchInventoryLevels(integer noOfPages){
        System.debug('Deprecated');
    } 

  
    global FetchInventoryLevels(String linkForNextPage, boolean isEnd, String store){
        this.linkForNextPage = linkForNextPage;
        this.isEnd = isEnd;
        this.store = store;
    } 
    global FetchInventoryLevels(String linkForNextPage, boolean isEnd, String store, String updated_at_min, String updated_at_max){
        this.linkForNextPage = linkForNextPage; 
        this.isEnd = isEnd;
        this.store = store;
        this.updated_at_min = updated_at_min;
        this.updated_at_max = updated_at_max;
    } 

    //Depreceated
    global FetchInventoryLevels(String linkForNextPage, boolean isEnd){
        this.linkForNextPage = linkForNextPage;
        this.isEnd = isEnd;
    }
    
    global Database.QueryLocator start(Database.BatchableContext BC){
        
        String queryConfiguration = 'Select '+CheckAccessibility.isAccessible('HIC_ShopifySync__Chunk_Size__c,name,HIC_ShopifySync__Default_Field_Mapping__c, HIC_ShopifySync__Shopify_URL__c,HIC_ShopifySync__Specify_Close_Date__c, HIC_ShopifySync__API_Key__c, HIC_ShopifySync__Private_Key_Password__c, HIC_ShopifySync__Opportunity__c, HIC_ShopifySync__Order__c, HIC_ShopifySync__Opportunity_Line_Item__c, HIC_ShopifySync__Order_Line_Item__c, HIC_ShopifySync__Order_Fulfillment__c, HIC_ShopifySync__Person_Account__c ','HIC_ShopifySync__HIC_Configuration__c')+' from HIC_ShopifySync__HIC_Configuration__c where '+CheckAccessibility.isAccessible('HIC_ShopifySync__Store__c','HIC_ShopifySync__HIC_Configuration__c')  +' = \''+store+'\' LIMIT 49999';
        configurationList = database.query(queryConfiguration);
        objectListToPass = new List <Object>();
        
        String query = '';
        if(locationId != null && locationId != ''){
            if(Schema.sObjectType.HIC_ShopifySync__Location__c.fields.HIC_ShopifySync__Shopify_Id__c.isAccessible()){
                query = 'Select HIC_ShopifySync__Shopify_Id__c From HIC_ShopifySync__Location__c where Id= :locationId limit 1';
            }
        }else{
            if(Schema.sObjectType.HIC_ShopifySync__Location__c.fields.HIC_ShopifySync__Shopify_Id__c.isAccessible()){
                query = 'Select HIC_ShopifySync__Shopify_Id__c From HIC_ShopifySync__Location__c where HIC_ShopifySync__is_processed__c  = false and HIC_ShopifySync__Store__c =:store limit 1';
            }
        }
        return  Database.getQueryLocator(query);
        
    } 
    
    global void execute(Database.BatchableContext BC, List<HIC_ShopifySync__Location__c> scope){
        String JSONResponse = '';
        locationsList = scope;
            List<HIC_ShopifySync__HIC_Field_Mapping__c> inventoryLevelList = new List<HIC_ShopifySync__HIC_Field_Mapping__c>([Select HIC_ShopifySync__SF_Field__c, HIC_ShopifySync__Shopify_Fields__c, HIC_ShopifySync__Nested__c , HIC_ShopifySync__IsSFID__c, HIC_ShopifySync__Default_Value__c from HIC_ShopifySync__HIC_Field_Mapping__c Where HIC_ShopifySync__Object_Name__c = 'HIC_ShopifySync__Inventory_Level__c' AND HIC_ShopifySync__Store__c =: store ]);
            for (HIC_ShopifySync__Location__c sObj : scope){ 
                if(sObj.Id != null && sObj.HIC_ShopifySync__Shopify_Id__c != null){
                    if(!Test.isRunningTest()){
                        locationId = sObj.Id; 
                     
                        if(String.isNotBlank(linkForNextPage) && !isEnd){
                            JSONResponse = HIC_ShopifyUtility.fetchAllDataWithLinkForNextPage('locations/'+sObj.HIC_ShopifySync__Shopify_Id__c+'/inventory_levels.json?limit='+configurationList[0].HIC_ShopifySync__Chunk_Size__c+'&page_info='+linkForNextPage, configurationList);
                        }else{
                            JSONResponse = HIC_ShopifyUtility.fetchAllDataWithLinkForNextPage('locations/'+sObj.HIC_ShopifySync__Shopify_Id__c+'/inventory_levels.json?limit='+configurationList[0].HIC_ShopifySync__Chunk_Size__c, configurationList);
                        }
                        if(String.isNotBlank(JSONResponse)){
                            Map<String,Object> main = (Map<String,Object>) JSON.deserializeUntyped(JSONResponse);
                            if(!main.isEmpty() && main.containskey('response') && main.containskey('link') ){
                                if( main.get('response') != null)
                                inventoryLevelResponse = String.valueof(main.get('response'));

                                
                                if(main.get('link') != null){
                                    linkForNextPage =  String.valueof(main.get('link'));
                                }else{
                                    isEnd = true;
                                }
                            }
                        }
                    }
                    else{
                        if(String.isEmpty(locationId)){
                            inventoryLevelResponse = '{ "inventory_levels": [ { "inventory_item_id": 21523210764352, "location_id": 23173333056, "available": 5, "updated_at": "2019-01-09T22:34:56-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21523210764352" }, { "inventory_item_id": 21523413696576, "location_id": 23173333056, "available": 56, "updated_at": "2019-01-11T00:34:44-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21523413696576" }, { "inventory_item_id": 21523718242368, "location_id": 23173333056, "available": 551, "updated_at": "2019-01-08T21:02:04-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21523718242368" }, { "inventory_item_id": 21523718275136, "location_id": 23173333056, "available": 5, "updated_at": "2019-01-10T03:25:32-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21523718275136" }, { "inventory_item_id": 21649822777408, "location_id": 23173333056, "available": 54, "updated_at": "2019-01-08T21:09:08-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21649822777408" }, { "inventory_item_id": 21680012296256, "location_id": 23173333056, "available": 65, "updated_at": "2019-01-08T23:06:51-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21680012296256" }, { "inventory_item_id": 21681311449152, "location_id": 23173333056, "available": 85, "updated_at": "2019-01-08T23:11:57-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21681311449152" }, { "inventory_item_id": 21681651843136, "location_id": 23173333056, "available": 555, "updated_at": "2019-01-10T02:08:22-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21681651843136" }, { "inventory_item_id": 21681941413952, "location_id": 23173333056, "available": 846, "updated_at": "2019-01-08T23:14:26-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21681941413952" }, { "inventory_item_id": 21707042914368, "location_id": 23173333056, "available": 54, "updated_at": "2019-01-09T01:15:11-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21707042914368" }, { "inventory_item_id": 21723101986880, "location_id": 23173333056, "available": 52, "updated_at": "2019-01-09T02:10:25-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21723101986880" }, { "inventory_item_id": 21733332877376, "location_id": 23173333056, "available": 45, "updated_at": "2019-01-09T02:58:09-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21733332877376" }, { "inventory_item_id": 21733592793152, "location_id": 23173333056, "available": 465, "updated_at": "2019-01-09T02:59:47-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21733592793152" }, { "inventory_item_id": 21856092782656, "location_id": 23173333056, "available": 8, "updated_at": "2019-01-09T22:37:11-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21856092782656" }, { "inventory_item_id": 22030277836864, "location_id": 23173333056, "available": 12, "updated_at": "2019-01-11T03:37:20-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=22030277836864" }, { "inventory_item_id": 22620080570432, "location_id": 23173333056, "available": 5412, "updated_at": "2019-01-14T00:07:24-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=22620080570432" }, { "inventory_item_id": 22620080635968, "location_id": 23173333056, "available": 0, "updated_at": "2019-01-14T00:07:23-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=22620080635968" }, { "inventory_item_id": 22623988842560, "location_id": 23173333056, "available": 25, "updated_at": "2019-01-14T00:21:21-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=22623988842560" }, { "inventory_item_id": 22647018618944, "location_id": 23173333056, "available": 0, "updated_at": "2019-01-14T02:13:12-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=22647018618944" }, { "inventory_item_id": 22650449887296, "location_id": 23173333056, "available": 10, "updated_at": "2019-01-14T02:44:58-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=22650449887296" }, { "inventory_item_id": 22656224624704, "location_id": 23173333056, "available": 0, "updated_at": "2019-01-14T03:54:59-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=22656224624704" }, { "inventory_item_id": 22656588972096, "location_id": 23173333056, "available": 232, "updated_at": "2019-01-14T03:59:10-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=22656588972096" }, { "inventory_item_id": 22656629309504, "location_id": 23173333056, "available": 2, "updated_at": "2019-01-14T03:59:50-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=22656629309504" } ] }';
                        } else {
                            inventoryLevelResponse = '{ "inventory_levels": [] }';
                        }
                    }
                    
                    system.debug('inventoryLevelResponse response--> '+inventoryLevelResponse);
                    if(inventoryLevelResponse != '' && inventoryLevelResponse != null ){
                        Map<String, Object> meta = (Map<String, Object>) JSON.deserializeUntyped(inventoryLevelResponse);
                        
                        if(meta.get('inventory_levels') !='[]' && meta.get('inventory_levels') !=null && meta.get('inventory_levels') != '' ){
                            objectList = (List<Object>) meta.get('inventory_levels');
                            objectListToPass.addAll(objectList);
                            system.debug('**objectListToPass'+objectListToPass);  
                        }
                        
                    }
                }
            }
    }
    
    global void finish(Database.BatchableContext BC){
        if(inventoryLevelResponse != '' && inventoryLevelResponse != null){ 
                if(objectListToPass != null && !objectListToPass.isEmpty()){
                    /*string inventoryItems = ''; 
                    //if(!scope.isEmpty()  && scope != null){
                        Integer listSize = objectListToPass.size();
                        Integer  i = 1; 
                        for(Object inventoryLevel : objectListToPass){
                            Map<String, Object> inventoryLevelMap = (Map<String, Object>)inventoryLevel;
                            inventoryItems += inventoryLevelMap.get('inventory_item_id') + ',';
                        }
                    //}
                    if(inventoryItems != null && inventoryItems != ''){
                        string inventoryLevelResponse = '';
                        if(!Test.isRunningTest()){
                            inventoryLevelResponse = HIC_ShopifyUtility.fetchAllData('inventory_items.json?ids='+inventoryItems, configurationList);
                        }
                        else{
                            inventoryLevelResponse = '{ "inventory_levels": [ { "inventory_item_id": 21523210764352, "location_id": 23173333056, "available": 5, "updated_at": "2019-01-09T22:34:56-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21523210764352" }, { "inventory_item_id": 21523413696576, "location_id": 23173333056, "available": 56, "updated_at": "2019-01-11T00:34:44-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21523413696576" }, { "inventory_item_id": 21523718242368, "location_id": 23173333056, "available": 551, "updated_at": "2019-01-08T21:02:04-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21523718242368" }, { "inventory_item_id": 21523718275136, "location_id": 23173333056, "available": 5, "updated_at": "2019-01-10T03:25:32-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21523718275136" }, { "inventory_item_id": 21649822777408, "location_id": 23173333056, "available": 54, "updated_at": "2019-01-08T21:09:08-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21649822777408" }, { "inventory_item_id": 21680012296256, "location_id": 23173333056, "available": 65, "updated_at": "2019-01-08T23:06:51-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21680012296256" }, { "inventory_item_id": 21681311449152, "location_id": 23173333056, "available": 85, "updated_at": "2019-01-08T23:11:57-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21681311449152" }, { "inventory_item_id": 21681651843136, "location_id": 23173333056, "available": 555, "updated_at": "2019-01-10T02:08:22-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21681651843136" }, { "inventory_item_id": 21681941413952, "location_id": 23173333056, "available": 846, "updated_at": "2019-01-08T23:14:26-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21681941413952" }, { "inventory_item_id": 21707042914368, "location_id": 23173333056, "available": 54, "updated_at": "2019-01-09T01:15:11-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21707042914368" }, { "inventory_item_id": 21723101986880, "location_id": 23173333056, "available": 52, "updated_at": "2019-01-09T02:10:25-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21723101986880" }, { "inventory_item_id": 21733332877376, "location_id": 23173333056, "available": 45, "updated_at": "2019-01-09T02:58:09-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21733332877376" }, { "inventory_item_id": 21733592793152, "location_id": 23173333056, "available": 465, "updated_at": "2019-01-09T02:59:47-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21733592793152" }, { "inventory_item_id": 21856092782656, "location_id": 23173333056, "available": 8, "updated_at": "2019-01-09T22:37:11-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=21856092782656" }, { "inventory_item_id": 22030277836864, "location_id": 23173333056, "available": 12, "updated_at": "2019-01-11T03:37:20-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=22030277836864" }, { "inventory_item_id": 22620080570432, "location_id": 23173333056, "available": 5412, "updated_at": "2019-01-14T00:07:24-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=22620080570432" }, { "inventory_item_id": 22620080635968, "location_id": 23173333056, "available": 0, "updated_at": "2019-01-14T00:07:23-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=22620080635968" }, { "inventory_item_id": 22623988842560, "location_id": 23173333056, "available": 25, "updated_at": "2019-01-14T00:21:21-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=22623988842560" }, { "inventory_item_id": 22647018618944, "location_id": 23173333056, "available": 0, "updated_at": "2019-01-14T02:13:12-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=22647018618944" }, { "inventory_item_id": 22650449887296, "location_id": 23173333056, "available": 10, "updated_at": "2019-01-14T02:44:58-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=22650449887296" }, { "inventory_item_id": 22656224624704, "location_id": 23173333056, "available": 0, "updated_at": "2019-01-14T03:54:59-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=22656224624704" }, { "inventory_item_id": 22656588972096, "location_id": 23173333056, "available": 232, "updated_at": "2019-01-14T03:59:10-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=22656588972096" }, { "inventory_item_id": 22656629309504, "location_id": 23173333056, "available": 2, "updated_at": "2019-01-14T03:59:50-12:00", "admin_graphql_api_id": "gid://shopify/InventoryLevel/22851813440?inventory_item_id=22656629309504" } ] }';
                        }
                        Map<String, Object> meta = (Map<String, Object>) JSON.deserializeUntyped(inventoryLevelResponse);
                        List<Object> objectList = (List<Object>) meta.get('inventory_items');
                        FetchInventoryItems  do1By1 = new FetchInventoryItems(objectList,store);
                        if(!Test.isRunningTest()){
                         Database.executeBatch(do1By1, 50);
                        }
                    }*/
                    FetchInventoryItems  do1By1 = new FetchInventoryItems(objectListToPass,store);
                    if(!Test.isRunningTest()){
                        Database.executeBatch(do1By1, 50);
                    }
                }
                if(!isEnd){
                        FetchInventoryLevels doItAgain = new FetchInventoryLevels(linkForNextPage,locationId,store,updated_at_min,updated_at_max);
                        if(!Test.isRunningTest()){
                        Database.executeBatch(doItAgain, 1);
                        }
                }else{  
                     if(!locationsList.isEmpty()){   
                        if(Schema.sObjectType.HIC_ShopifySync__Location__c.fields.HIC_ShopifySync__is_processed__c.isUpdateable() && CheckAccessibility.isUpdateable('HIC_ShopifySync__is_processed__c','HIC_ShopifySync__Location__c')){
                            locationsList[0].HIC_ShopifySync__is_processed__c = true ;
                        }
                           
                        if(Schema.getGlobalDescribe().get('HIC_ShopifySync__Location__c').getDescribe().isUpdateable() && CheckAccessibility.isUpsertable('id','HIC_ShopifySync__Location__c') && CheckAccessibility.isUpdateable('id','HIC_ShopifySync__Location__c') && Schema.sObjectType.HIC_ShopifySync__Location__c.isUpdateable()){
                            Schema.SObjectType objectType = Schema.getGlobalDescribe().get('HIC_ShopifySync__Location__c');
                            Map<String, SObjectField> fieldMap = objectType.getDescribe().fields.getMap();
                            Schema.SobjectField theField = fieldMap.get('HIC_ShopifySync__Shopify_Id__c');
                            EmailErrorCSV.makeCsvAndSendInEmail(JSON.serialize(locationsList),'HIC_ShopifySync__Location__c',locationsList,theField,false,store);
                        }     
                    }
                    list<HIC_ShopifySync__Location__c> locList = new list<HIC_ShopifySync__Location__c>([Select Id,HIC_ShopifySync__is_processed__c from HIC_ShopifySync__Location__c where HIC_ShopifySync__is_processed__c = false]);
                    
                    if(!locList.IsEmpty()){
                        FetchInventoryLevels doItAgain = new FetchInventoryLevels('',false,store,updated_at_min,updated_at_max);
                        Database.executeBatch(doItAgain, 1);  
                    }else{
                        for(HIC_ShopifySync__Location__c loc : locList){
                            loc.HIC_ShopifySync__is_processed__c = false;  
                        }
                        try{
                            database.update(locList,false);
                        }catch(Exception e){
                            
                        }
                        FetchInventoryItems do1By1 = new FetchInventoryItems(true,store,updated_at_min,updated_at_max);
                        Database.executeBatch(do1By1, 1); 
                    } 
                    
                }
        }else{
            FetchInventoryItems do1By1 = new FetchInventoryItems(true,store,updated_at_min,updated_at_max);
            Database.executeBatch(do1By1, 1);
        }
    }
}