public class InsertDataInToNewShopCtrl{

    public InsertDataInToNewShopCtrl(){
    }

    Map<String,Id> testMap = new Map<String,Id>();
    Map<Id,Shop_New__c> shopObjs = null;

    public PageReference GoToInse() {

        try{
            HttpRequest req= new HttpRequest();
            Http http = new Http();
            req.setMethod('GET');

            String url = 'http://iprocureafrica.co/index.php/restApi/shop_c/3';
            req.setEndpoint(url);

            HttpResponse res = http.send(req);
            String json =  res.getBody().replace('n','');

            parseJSON(json);

            shopObjs = new Map<Id,Shop_New__c>([Select id,Shop_ID__c from Shop_New__c where Shop_ID__c IN : shopIds]);
            for (ID idKey : shopObjs.keyset())
            {
                Shop_New__c objShop = shopObjs.get(idKey);
                testMap.put(objShop.Shop_ID__c, idKey);
            }
            mapShopFields();
        }
        catch(Exception e ){
            Apexpages.addMessages(e);
        }

        return null;
    }



    public List<WrapperClass> wrappers{get;set;}

    Public String size{get;set;}
    list<string> shopIds = new list<string>();


    public void mapShopFields(){
        List<Shop_New__c> shopRecords = new List<Shop_New__c>();  // object list

                    for(WrapperClass wc:wrappers)
                    {
                    Shop_New__c shp = new Shop_New__c ();   // object instance with memory allocation.
                    // field mapping
                        if(testMap.containsKey(wc.id)){
                            shp.Id = testMap.get(wc.id);
                        }
                    shp.Shop_ID__c= wc.id;
                    shp.Name = wc.name;
                    shp.Email__c = wc.email ;
                    shp.Supplier_ID__c = wc.supplierid;
                   // shp.User_Name__c = wc.username;
                    //shp.Password__c = wc.password ;

                   // shp.Pin__c = wc.pin;
                    //shp.Location__c = wc.location ;
                    //shp.Telephone__c = wc.telephone ;


                    //shp.Gender__c = wc.gender ;

                    //shp.Type__c = wc.type ;
                   // shp.Last_Login__c = wc.lastLogin ;
                   // shp.Create_Time__c = wc.createtime ;
                    //shp.Salesforce_Status__c = wc.salesforcestatus ;
                    shopRecords.add(shp); // add to list
                    //List<Shop_New__c> spList = [select id from Shop_New__c limit 2000]

                    }

                    If(shopRecords .size() > 0 ) // check list size
                    {

                        upsert shopRecords ; // insert list.

                    }

    }

    public void parseJSON(String jsonstr){
        if (jsonstr != null){
        wrappers= new List<WrapperClass>();
        JSONParser parser = JSON.createParser(jsonstr);
        while (parser.nextToken() != null)
        {
            if (parser.getCurrentToken() == JSONToken.START_ARRAY)
            {

                while (parser.nextToken() !=  JSONToken.END_ARRAY)
                {
                    if (parser.getCurrentToken() == JSONToken.START_OBJECT)
                    {

                        WrapperClass ci = new WrapperClass();
                        while (parser.nextToken() !=  JSONToken.END_OBJECT)
                        {


                                if((parser.getCurrentToken() == JSONToken.FIELD_NAME) &&(parser.getText().tolowercase() == 'id'))
                                {
                                    parser.nextToken();
                                    ci.id = parser.getText();
                                    shopIds.add(ci.id);
                                }
                                if((parser.getCurrentToken() == JSONToken.FIELD_NAME) &&(parser.getText().tolowercase() == 'Name'))
                                {
                                    parser.nextToken();
                                    ci.Name = parser.getText();
                                }
                                if((parser.getCurrentToken() == JSONToken.FIELD_NAME) &&(parser.getText().tolowercase() == 'Username'))
                                {
                                    parser.nextToken()     ;
                                    ci.Username = parser.getText();
                                }
                                if((parser.getCurrentToken() == JSONToken.FIELD_NAME) &&(parser.getText().tolowercase() == 'Password'))
                                {
                                    parser.nextToken()     ;
                                    ci.Password = parser.getText();
                                }
                                 if((parser.getCurrentToken() == JSONToken.FIELD_NAME) &&(parser.getText().tolowercase() == 'supplierid'))
                                {
                                    parser.nextToken()     ;
                                    ci.supplierid = parser.getText();
                                }
                                if((parser.getCurrentToken() == JSONToken.FIELD_NAME) &&(parser.getText().tolowercase() == 'pin'))
                                {
                                    parser.nextToken()     ;
                                    ci.pin = parser.getText();
                                }
                                if((parser.getCurrentToken() == JSONToken.FIELD_NAME) &&(parser.getText().tolowercase() == 'location'))
                                {
                                    parser.nextToken()     ;
                                    ci.location = parser.getText();
                                }
                                if((parser.getCurrentToken() == JSONToken.FIELD_NAME) &&(parser.getText().tolowercase() == 'telephone'))
                                {
                                    parser.nextToken()     ;
                                    ci.telephone = parser.getText();
                                }
                                if((parser.getCurrentToken() == JSONToken.FIELD_NAME) &&(parser.getText().tolowercase() == 'email'))
                                {
                                    parser.nextToken()     ;
                                   ci.email = parser.getText();
                                  // ci.email =  'test@gmail.com';
                                }
                                if((parser.getCurrentToken() == JSONToken.FIELD_NAME) &&(parser.getText().tolowercase() == 'gender'))
                                {
                                    parser.nextToken()     ;
                                    ci.gender = parser.getText();
                                }
                                if((parser.getCurrentToken() == JSONToken.FIELD_NAME) &&(parser.getText().tolowercase() == 'type'))
                                {
                                    parser.nextToken()     ;
                                    ci.type = parser.getText();
                                }
                                if((parser.getCurrentToken() == JSONToken.FIELD_NAME) &&(parser.getText().tolowercase() == 'lastLogin'))
                                {
                                    parser.nextToken()     ;
                                    ci.lastLogin= parser.getText();
                                }
                                if((parser.getCurrentToken() == JSONToken.FIELD_NAME) &&(parser.getText().tolowercase() == 'createtime'))
                                {
                                    parser.nextToken()     ;
                                    ci.createtime = parser.getText();
                                }
                                if((parser.getCurrentToken() == JSONToken.FIELD_NAME) &&(parser.getText().tolowercase() == 'salesforcestatus'))
                                {
                                    parser.nextToken()     ;
                                    ci.salesforcestatus = parser.getText();
                                }
                        }
                        wrappers.add(ci);




                            }
                        }
                    }
                }
      }
    }

    public class WrapperClass{
        public string id {get;set;}
        public string name {get;set;}
        public string username{get;set;}
        public string password{get;set;}
        public string supplierid {get;set;}
        public string pin{get;set;}
        public string location{get;set;}
        public string telephone{get;set;}
        public string email{get;set;}
        public string gender{get;set;}
        public string type{get;set;}
        public string lastLogin{get;set;}
        public string createtime{get;set;}
        public string salesforcestatus{get;set;}
        public WrapperClass(){

        }
    }
}

private void parseJSON(String jsonstr){
    if (jsonstr != null) {
        wrappers = (List<WrapperClass>) JSON.deserialize(jsonstr, List<WrapperClass>.class);
    } else {
        wrappers = new List<WrapperClass>();
    }
}