From b52519979cddd6b389c1808657855177a86a1f08 Mon Sep 17 00:00:00 2001
From: Dennis Eckerskorn <denniseckerskorn@gmail.com>
Date: Wed, 28 May 2025 23:44:56 +0200
Subject: [PATCH] Added better invoice generation

---
 .../finance_service/InvoicePdfGenerator.java  | 67 ++++++++++++++++---
 1 file changed, 56 insertions(+), 11 deletions(-)

diff --git a/memberflow-api/src/main/java/com/denniseckerskorn/services/finance_service/InvoicePdfGenerator.java b/memberflow-api/src/main/java/com/denniseckerskorn/services/finance_service/InvoicePdfGenerator.java
index 02dbeda..cb4fcd8 100644
--- a/memberflow-api/src/main/java/com/denniseckerskorn/services/finance_service/InvoicePdfGenerator.java
+++ b/memberflow-api/src/main/java/com/denniseckerskorn/services/finance_service/InvoicePdfGenerator.java
@@ -1,6 +1,9 @@
 package com.denniseckerskorn.services.finance_service;
 
 import com.denniseckerskorn.entities.finance.Invoice;
+import com.denniseckerskorn.entities.finance.InvoiceLine;
+import com.denniseckerskorn.entities.finance.ProductService;
+import com.denniseckerskorn.entities.user_managment.users.Student;
 import com.itextpdf.kernel.pdf.PdfWriter;
 import com.itextpdf.kernel.pdf.PdfDocument;
 import com.itextpdf.layout.Document;
@@ -8,6 +11,7 @@ import com.itextpdf.layout.element.Paragraph;
 import org.springframework.stereotype.Service;
 
 import java.io.ByteArrayOutputStream;
+import java.math.BigDecimal;
 
 @Service
 public class InvoicePdfGenerator {
@@ -19,24 +23,65 @@ public class InvoicePdfGenerator {
         PdfDocument pdf = new PdfDocument(writer);
         Document doc = new Document(pdf);
 
-        doc.add(new Paragraph("Factura #" + invoice.getId()));
+        // Cabecera
+        doc.add(new Paragraph("FACTURA #" + invoice.getId()).setFontSize(16).setBold());
         doc.add(new Paragraph("Fecha: " + invoice.getDate()));
-        doc.add(new Paragraph("Cliente: " + invoice.getUser().getName() + " " + invoice.getUser().getSurname()));
         doc.add(new Paragraph("Estado: " + invoice.getStatus()));
+        doc.add(new Paragraph(" "));
+
+        // Información del cliente
+        var user = invoice.getUser();
+        doc.add(new Paragraph("Cliente: " + user.getName() + " " + user.getSurname()));
+        doc.add(new Paragraph("Email: " + user.getEmail()));
+        doc.add(new Paragraph("Teléfono: " + user.getPhoneNumber()));
+        doc.add(new Paragraph("Dirección: " + user.getAddress()));
+
+        // Si es estudiante, mostrar info básica (sin tutor ni cinturón)
+        Student student = user.getStudent();
+        if (student != null) {
+            doc.add(new Paragraph("DNI: " + student.getDni()));
+            doc.add(new Paragraph("Fecha de nacimiento: " + student.getBirthdate()));
+        }
 
         doc.add(new Paragraph(" "));
-        doc.add(new Paragraph("Detalle de productos:"));
 
-        invoice.getInvoiceLines().forEach(line -> {
-            String product = line.getProductService().getName();
-            int qty = line.getQuantity();
-            var price = line.getUnitPrice();
-            var total = line.getSubtotal();
-            doc.add(new Paragraph("- " + product + " x" + qty + " - " + price + " € = " + total + " €"));
-        });
+        // Detalle de productos
+        doc.add(new Paragraph("Detalle de productos:").setBold());
+        doc.add(new Paragraph("Producto | Cant. | Precio | IVA % | Subtotal (sin IVA) | IVA"));
+
+        BigDecimal totalSubtotal = BigDecimal.ZERO;
+        BigDecimal totalIVA = BigDecimal.ZERO;
+
+        for (InvoiceLine line : invoice.getInvoiceLines()) {
+            ProductService product = line.getProductService();
+            String nombre = product.getName();
+            int cantidad = line.getQuantity();
+            BigDecimal unitPrice = line.getUnitPrice(); // sin IVA
+            BigDecimal subtotalSinIVA = unitPrice.multiply(BigDecimal.valueOf(cantidad));
+            BigDecimal porcentajeIVA = product.getIvaType().getPercentage();
+            BigDecimal iva = subtotalSinIVA.multiply(porcentajeIVA).divide(BigDecimal.valueOf(100));
+
+            totalSubtotal = totalSubtotal.add(subtotalSinIVA);
+            totalIVA = totalIVA.add(iva);
+
+            doc.add(new Paragraph(
+                    nombre + " | " +
+                            cantidad + " | " +
+                            unitPrice + " € | " +
+                            porcentajeIVA + "% | " +
+                            subtotalSinIVA + " € | " +
+                            iva + " €"
+            ));
+        }
+
+        // Totales
+        doc.add(new Paragraph(" "));
+        doc.add(new Paragraph("Subtotal (sin IVA): " + totalSubtotal + " €").setBold());
+        doc.add(new Paragraph("IVA total: " + totalIVA + " €").setBold());
+        doc.add(new Paragraph("TOTAL: " + totalSubtotal.add(totalIVA) + " €").setFontSize(14).setBold());
 
         doc.add(new Paragraph(" "));
-        doc.add(new Paragraph("TOTAL: " + invoice.getTotal() + " €"));
+        doc.add(new Paragraph("Gracias por su compra.").setItalic());
 
         doc.close();
         return out.toByteArray();