public class payment {
    @InvocableVariable(label='RecordID')
    public String recordID;
    @InvocableVariable(label='Status')
    public String status;
}

@InvocableMethod(label='Generate PDF')
public static void generatePDF(List<payment> payments)
{
    payment pr = payments[0];

    String QuoteID;

    Opportunity opp = [select id,Pricebook2Id,owner.email,name,accountid,account.personcontactid,account.billingstreet,account.PersonEmail,account.billingcity,account.billingstate,account.billingpostalcode from opportunity where id =: pr.recordID];

    List<Opportunitylineitem> lstOpplineItems = [SELECT Id,ListPrice,Name,OpportunityId,PricebookEntryId,Product2Id,ProductCode,Product_Family__c,Product_Name__c,Quantity,TotalPrice,UnitPrice FROM OpportunityLineItem where OpportunityId =: opp.id];

    List<OpportunityContactRole> lstOppContactRoles = [SELECT ContactId,contact.email,Contact.mailingstreet,Contact.mailingcity,Contact.mailingstate,Contact.mailingpostalcode,Id,IsPrimary,OpportunityId,Role FROM OpportunityContactRole where OpportunityId =: opp.id and IsPrimary = True];


    system.debug('Status' + pr.status);

    //Create the quote once the payment request is sent to the customer
    if(pr.status == 'Created' || pr.status == 'Manually Sent' || pr.status == 'Auto Sent')
    {
        String MailingStreet = '';
        String MailingCity = '';
        String MailingState = '';
        String MailingPostalCode = '';


        //List<contact> listContacts = [select id,email,name,MailingCity,MailingCountry,MailingPostalCode,MailingState,MailingStreet,accountid from contact where id =: lstOppContactRoles[0].contactid];

        //Take the address from the contact linked with the opp
        if(lstOppContactRoles.size() == 0)
        {
            MailingStreet = opp.account.billingstreet;
            MailingCity = opp.account.billingcity;
            MailingState = opp.account.billingstate;
            MailingPostalCode = opp.account.billingpostalcode;

        }
        else
        {
            MailingStreet = lstOppContactRoles[0].Contact.mailingstreet;
            MailingCity = lstOppContactRoles[0].Contact.mailingcity;
            MailingState = lstOppContactRoles[0].Contact.mailingstate;
            MailingPostalCode = lstOppContactRoles[0].Contact.mailingpostalcode;
        }

        //Create the quote here
        Quote q = new Quote();
        q.OpportunityId = opp.id;
        q.name = 'Quote : Online Payment - ' + Opp.Name;
        q.Notes_about_your_order__c = 'N/A';


        q.Status = 'Draft';
        q.BillingStreet =MailingStreet;
        q.BillingCity =MailingCity;
        q.BillingState =MailingState;
        q.BillingPostalCode =MailingPostalCode;

        q.ShippingStreet =MailingStreet;
        q.ShippingCity =MailingCity;
        q.ShippingState =MailingState;
        q.ShippingPostalCode =MailingPostalCode;
        q.Pricebook2Id = opp.Pricebook2Id;

        insert q;

        //Create quote line items based on opp line items

        List<QuoteLineItem> listQuoteLineItem = new List<QuoteLineItem>();
        for(Opportunitylineitem OppLineItem : lstOpplineItems)
        {
            QuoteLineItem qlt = new QuoteLineItem();


            qlt.PricebookEntryId  = OppLineItem.PricebookEntryId ;
            qlt.Product2Id   = OppLineItem.Product2Id  ;
            qlt.Quantity   = OppLineItem.Quantity ;
            qlt.UnitPrice   = OppLineItem.UnitPrice  ;
            qlt.QuoteId   = q.id ;

            listQuoteLineItem.add(qlt);
        }

        insert listQuoteLineItem;
    }
    else //The payment request is now paid, hence a quote PDF will be created and sent to the customer
    {
        List<Quote> quotes = [select id,contactid,email from quote where opportunityid =: opp.id limit 1];
        List<Quote> quotestoUpdate = new List<Quote>();
        if(quotes.size()>0)
        {
            QuoteID = quotes[0].id;
            String quotetemplateID = '0EH24000000yKo7';
            String quoteUrl = '/quote/quoteTemplateDataViewer.apexp?id=';
            quoteUrl +=QuoteID;
            quoteUrl +='&headerHeight=190&footerHeight=188&summlid=';
            quoteUrl +=quotetemplateID ;
            quoteUrl +='#toolbar=1&navpanes=0&zoom=90';

            //Create pdf content
            PageReference pg = new PageReference(quoteUrl) ;

            //Document object of quote which hold the quote pdf
            QuoteDocument quotedoc = new QuoteDocument();

            Blob b;
            if (Test.IsRunningTest())
            {
                b = Blob.valueOf('UNIT.TEST');
            }
            else
            {
                b = pg.getContentAsPDF() ;
            }


            //content assign to document
            quotedoc.Document = b;

            //assign quote id where pdf should attach
            quotedoc.QuoteId = QuoteID ;

            //insert the quotdoc
            insert quotedoc;


            EmailTemplate templateId = [Select id from EmailTemplate where name = 'Customer VAT Receipt'];

            /// Send the email to the customer
            Messaging.SingleEmailMessage email = new Messaging.SingleEmailMessage();

            // Create the email attachment with the quote PDF created above
            email.setTemplateID(templateId.Id);

            if(lstOppContactRoles.size() == 0)
                email.setTargetObjectId(opp.account.personcontactid);
            else
                email.setTargetObjectId(lstOppContactRoles[0].contactid);

            email.setSaveAsActivity(false);
            Messaging.EmailFileAttachment efa = new Messaging.EmailFileAttachment();
            efa.setFileName('attachment.pdf');
            efa.setBody(b);

            String[] toAddresses;
            if(lstOppContactRoles.size() == 0)
                toAddresses = new String[] {opp.account.PersonEmail};
            else
                toAddresses = new String[] {lstOppContactRoles[0].contact.email};

            //String[] toAddresses = new String[] {opp.account.PersonEmail};
            String[] ccAddresses = new String[] {opp.owner.email};

            email.setToAddresses( toAddresses );
            email.setCcAddresses( ccAddresses );
            //email.setPlainTextBody( 'This is a simple email body' );
            email.setFileAttachments(new Messaging.EmailFileAttachment[] {efa});

            Messaging.SendEmailResult [] r =
                Messaging.sendEmail(new Messaging.SingleEmailMessage[] {email});


            //Once the email is sent to the customer with Quote and PDF attached, the quote status will be changed to accepted.
            quotes[0].status = 'Accepted';
            quotestoUpdate.add(quotes[0]);

            update quotestoUpdate;

            //Finally the Opp stage will be changed to Invoiced.
            opp.StageName = 'Invoiced';

            update opp;
        }
    }
}