public class OAUTH_Client {
    Public String login_url {set; get;} //login.salesforce.com || test.salesforce.com
    Public Boolean type_z  {set; get;}
    Public String oauth_url  = '/services/oauth2/token';
    Public List<Client_Org_Information__c> clientOrgSF {set; get;}

    public OAUTH_Client() {}

        @future(callout=true)
        public static void getSFOAuth(List<Id> orgIds){
            OAUTH_Client newOC = new OAUTH_Client();
            newOC.execute_SFOAuth(orgIds);

        }


    public String execute_SFOAuth(List<Id> orgIds){
        List<Client_Org_Information__c> clientSO = getOrgInfo(orgIds);
        String end_point;
        String client_id;
        String client_secret;
        String username;
        String password;
        List<Client_Org_Information__c> toUpdateClientS = new
      List<Client_Org_Information__c>();
        if(clientSO.size() > 0){

            for(Client_Org_Information__c org: clientSO){

                end_point       = (org.type__c == 'Sandbox') ? 'https://test.saleforce.com' : 'https://login.salesforce.com';
                end_point       += oauth_url;
                client_id       = org.client_id__c;
                client_secret   = org.client_secret__c;
                username        = org.username__c;
                password        = org.password__c;

                String JSON_BODY = Send_API(end_point, client_id, client_secret, username, password);

                Map<String, Object> m = (Map<String, Object>)JSON.deserializeUntyped(JSON_BODY);

                Client_Org_Information__c sfClient = new Client_Org_Information__c();
                sfClient.Id = org.Id;
                sfClient.instance_url__c = string.valueOf(m.get('instance_url'));
                sfClient.access_token__c = string.valueOf(m.get('access_token'));

                toUpdateClientS.add(sfClient);

            }
        }

        try {
            if(toUpdateClientS.size() > 0) update toUpdateClientS;
        }catch(Exception e){
            System.debug('ERROR: '+e.getMessage() + ' ' +e.getStackTraceString());
        }
        return null;
    }

    public static String Send_API(String END_POINT, String CLIENT_ID, String CLIENT_SECRET, String USERNAME, String PASSWORD){

        HttpRequest req = new HttpRequest();
        req.setEndpoint(END_POINT);
        req.setMethod('POST');
        req.setHeader('Content-Type', 'application/x-www-form-urlencoded');
        String payLoad = 'grant_type=password'
                    + '&username=' + USERNAME
                    + '&password=' + PASSWORD
                    + '&client_id=' + CLIENT_ID
                    + '&client_secret=' + CLIENT_SECRET;
                    //+ '&scope=PRODUCTION';
        req.setBody(payLoad);
        System.debug('ENDPOINT: '+END_POINT);
        System.debug('payLoad: '+payLoad);
        System.debug('Request: '+req);
        Http http = new Http();
        HttpResponse res = http.send(req);
        System.debug('REsponse: ' + res.getBody());
        return res.getBody();

    }

    public List<Client_Org_Information__c> getOrgInfo(List<Id> orgIds){

        clientOrgSF = [SELECT Id, client_id__c, type__c, client_secret__c, username__c, password__c FROM Client_Org_Information__c WHERE Id IN: orgIds];
        return clientOrgSF;
    }

    }

public class SF_SystemOverview {
    Public String endpoint_url  = '/services/apexrest/api/PackageLicense';
    Public List<Client_Org_Information__c> clientOrgSF {set; get;}
    Public List<Client_Org_System_Overview__c> clientOrgSO {set; get;}

    public SF_SystemOverview() {}

    @future(callout=true)
    public static void getSFOverview(List<Id> orgIds){
        SF_SystemOverview newOC = new SF_SystemOverview();
        newOC.execute_SFOverview(orgIds);

    }

    public String execute_SFOverview(List<Id> orgIds){
        List<Client_Org_Information__c> clientSO = getOrgInfo(orgIds);
        String end_point;
        String access_token;
        List<Client_Org_System_Overview__c> toUpdateClientSO = new
        List<Client_Org_System_Overview__c>();
        if(clientSO.size() > 0){

            for(Client_Org_Information__c org: clientSO){

                end_point       = org.Instance_URL__c;
                end_point       += endpoint_url;
                access_token    = org.Access_Token__c;

                String JSON_BODY = Send_API(end_point, access_token);

                Client_Org_System_Overview__c sfClientSO = new
Client_Org_System_Overview__c();
                Map<String, Object> m = (Map<String,
Object>)JSON.deserializeUntyped(JSON_BODY);
                Map<String, Object> Storages = (Map<String,Object>)m.get('Storage');
                Map<String, Object> APIs = (Map<String,Object>)m.get('Api_Usage');
                sfClientSO.client_id__c = org.Id;
                sfClientSO.UsedDataStorage__c = string.valueOf(Storages.get('UsedDataStorage'));
                sfClientSO.TotalDataStorage__c = string.valueOf(Storages.get('TotalDataStorage'));
                sfClientSO.RemainingDataStorage__c = string.valueOf(Storages.get('RemainingDataStorage'));
                sfClientSO.usedAPI__c = string.valueOf(APIs.get('usedApi'));
                sfClientSO.remApi__c = string.valueOf(APIs.get('remApi'));
                sfClientSO.maxApi__c = string.valueOf(APIs.get('maxApi'));

                toUpdateClientSO.add(sfClientSO);

            }

        }

        try {
            if(toUpdateClientSO.size() > 0) update toUpdateClientSO;
        }catch(Exception e){
            System.debug('ERROR: '+e.getMessage() + ' ' +e.getStackTraceString());
        }
        return null;
    }
    public String Send_API(String end_point, String access_token){

        HttpRequest req = new HttpRequest();
        req.setEndpoint(end_point);
        req.setMethod('GET');
        req.setHeader('Authorization' , 'Bearer'+' '+ access_token)

        System.debug('ENDPOINT: '+END_POINT);
        System.debug('Request: '+req);
        Http http = new Http();
        HttpResponse res = http.send(req);
        System.debug('Response: ' + res.getBody());
        return res.getBody();

    }

    public List<Client_Org_Information__c> getOrgInfo(List<Id> orgIds){
        clientOrgSF = [SELECT Id, Instance_URL__c, Access_Token__c FROM
Client_Org_Information__c WHERE Id IN: orgIds];
        return clientOrgSF;
    }
}

trigger Callout on Client_Org_Information__c (after insert, after update) {

    if(System.isFuture()) return;

    List<Id> idS = new List<Id>();
    for(Client_Org_Information__c a : trigger.new){
        idS.add(a.Id);
    }

    OAUTH_Client.getSFOAuth(idS);
    SF_SystemOverview.getSFOverview(idS);
}