public class InvokeSendLink {
    private static final String RAZORPAY_API_URL = 'https://api.razorpay.com/v1/payment_links/';
    private static final String RAZORPAY_KEY_ID = System.label.Key_Id_of_Razor_Pay;
    private static final String RAZORPAY_KEY_SECRET = System.label.key_secret_of_RazorPay;
    
    public class SendLinkInput {
        @InvocableVariable(label = 'Opportunity Name' required=true)
        public String OppName;
        
        @InvocableVariable(label = 'Amount' required=true)
        public Decimal Amount;
        
        @InvocableVariable(label = 'Email' required=true)
        public String Email;
        
        @InvocableVariable(label = 'Phone' required=true)
        public String Phone; 
        
        @InvocableVariable(label = 'ContactName' required=true)
        public String ContactName;  
    }
    
    public class SendLinkOutput {
        @InvocableVariable(label = 'Payment ID')
        public String paymentId;
        
        @InvocableVariable(label = 'Status')
        public String status;
    }
    
    
    @InvocableMethod(label='Send Payment Link' description='Sending the Payment Link To Donor')
    public static List<SendLinkOutput> InvokeMethod(List<SendLinkInput> inputs) {
        List<SendLinkOutput> outputs = new List<SendLinkOutput>();
        
        if (inputs != null && !inputs.isEmpty()) {
            for (SendLinkInput input : inputs) {
                SendLinkOutput output = sendLinkMethod(input.Amount, input.Email, input.Phone, input.ContactName);
                outputs.add(output);
            }
        }
        System.debug(outputs);
        return outputs;
    }
    
    //Send Payment Link Method
    public static SendLinkOutput sendLinkMethod(Decimal Amount,String Email,String Phone,String ContactName){
        HttpRequest req = new HttpRequest();
        req.setEndpoint(RAZORPAY_API_URL);
        req.setMethod('POST');
        req.setHeader('Content-Type', 'application/json');
        req.setHeader('Authorization', 'Basic ' + EncodingUtil.base64Encode(Blob.valueOf(RAZORPAY_KEY_ID + ':' + RAZORPAY_KEY_SECRET)));
        
        Map<String, Object> requestBody = new Map<String, Object>{
            'amount' => (Integer)(Amount * 100), // Razorpay expects amount in paise
                'currency' => 'INR',
                'description' => 'Payment link expires in 24 hours',
                'expire_by' => System.now().addDays(1).getTime() / 1000,
                'customer' => new Map<String, Object>{
                    'name' => ContactName,
                        'contact' => '+91'+Phone,
                        'email' => Email
                        },
                            'notify' => new Map<String, Object>{
                                'sms' => true,
                                    'email' => true
                                    }
        };
            
            req.setBody(JSON.serialize(requestBody));
        
        Http http = new Http();
        HttpResponse res = http.send(req);
        
        if (res.getStatusCode() == 200) {
            Map<String, Object> responseBody = (Map<String, Object>)JSON.deserializeUntyped(res.getBody());
            SendLinkOutput output = new SendLinkOutput();
            output.paymentId = (String)responseBody.get('id');
            output.status = (String)responseBody.get('status');
            return output;
            
        } else {
            System.debug('Error creating payment link. Status code: ' + res.getStatusCode());
            System.debug('Response body: ' + res.getBody());
            return null;
        }
    }
}