diff --git a/public/userarea/edit_template_xls.php b/public/userarea/edit_template_xls.php
index c3dd001..ef817d2 100644
--- a/public/userarea/edit_template_xls.php
+++ b/public/userarea/edit_template_xls.php
@@ -1,26 +1,27 @@
 <?php include('include/headscript.php');
 
-// Controlla se è stato passato un ID valido
+// Check if a valid ID was provided
 if (!isset($_GET['id']) || !is_numeric($_GET['id'])) {
-    header("Location: xlstemplates_grid.php?status=error&message=" . urlencode("Invalid ID"));
+    header("Location: templates_dashboard.php?status=error&message=" . urlencode("Invalid ID"));
     exit;
 }
 
-$id = intval($_GET['id']); // Sanifica l'ID
+$id = intval($_GET['id']);
 
-// Recupera il template dal database
+// Retrieve template from database
 $db = DBHandlerSelect::getInstance();
 $pdo = $db->getConnection();
+
 $stmt = $pdo->prepare("SELECT * FROM excel_templates WHERE id = ?");
 $stmt->execute([$id]);
 $template = $stmt->fetch(PDO::FETCH_ASSOC);
 
 if (!$template) {
-    header("Location: template_dashboard.php?status=error&message=" . urlencode("Template not found"));
+    header("Location: templates_dashboard.php?status=error&message=" . urlencode("Template not found"));
     exit;
 }
 
-// Recupera tutte le routine dal database
+// Retrieve all routines
 $stmt = $pdo->prepare("SELECT * FROM routine");
 $stmt->execute();
 $routines = $stmt->fetchAll(PDO::FETCH_ASSOC);
@@ -34,7 +35,6 @@ $routines = $stmt->fetchAll(PDO::FETCH_ASSOC);
     <link rel="icon" href="assets/images/favicon-32x32.png" type="image/png" />
     <link href="https://cdn.jsdelivr.net/npm/select2@4.1.0-rc.0/dist/css/select2.min.css" rel="stylesheet" />
     <?php include('cssinclude.php'); ?>
-    <!-- Include jQuery prima di Select2 -->
     <script src="https://code.jquery.com/jquery-3.6.0.min.js" integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4=" crossorigin="anonymous"></script>
     <script src="https://cdn.jsdelivr.net/npm/select2@4.1.0-rc.0/dist/js/select2.min.js"></script>
     <title>Edit Template <?= htmlspecialchars($titlewebsite, ENT_QUOTES, 'UTF-8'); ?></title>
@@ -44,19 +44,22 @@ $routines = $stmt->fetchAll(PDO::FETCH_ASSOC);
     <div class="wrapper">
         <?php include('include/navbar.php'); ?>
         <?php include('include/topbar.php'); ?>
+
         <div class="page-wrapper">
             <div class="page-content">
+
                 <div class="card mb-4">
                     <div class="card-header">
-                        <h5 class="mb-0">Update XLS Template</h5>
+                        <h5 class="mb-0">Update Template</h5>
                     </div>
                     <div class="card-body">
-                        <p class="mb-2">Edit the following form in order to update the selected import XLS template</p>
+                        <p class="mb-2">Edit the following form in order to update the selected import template</p>
                         <p class="mb-2">Mandatory Fields</p>
                         <ul class="mb-0">
                             <li>Template Name</li>
-                            <li>Row Header and Column Header: where the title of the excel starts</li>
-                            <li>Schema</li>
+                            <li>Source Type</li>
+                            <li>Schema and Client</li>
+                            <li>Row Header and Column Header only for XLS templates</li>
                         </ul>
                     </div>
                 </div>
@@ -69,34 +72,44 @@ $routines = $stmt->fetchAll(PDO::FETCH_ASSOC);
                             </div>
                         </div>
                     </div>
+
                     <div class="card-body">
                         <div class="col-12">
                             <form id="editTemplateForm" method="POST">
-                                <input type="hidden" name="id" value="<?php echo $template['id']; ?>">
+                                <input type="hidden" name="id" value="<?php echo (int)$template['id']; ?>">
 
                                 <div class="mb-3">
                                     <label class="form-label"><?= htmlspecialchars($templatename, ENT_QUOTES, 'UTF-8'); ?> *</label>
-                                    <input type="text" name="name" class="form-control" value="<?php echo htmlspecialchars($template['name']); ?>" required>
+                                    <input type="text" name="name" class="form-control" value="<?php echo htmlspecialchars($template['name'] ?? ''); ?>" required>
                                 </div>
 
                                 <div class="mb-3">
+                                    <label class="form-label">Source Type *</label>
+                                    <select name="source_type" id="sourceType" class="form-control" required>
+                                        <option value="XLS" <?php echo (($template['source_type'] ?? 'XLS') === 'XLS') ? 'selected' : ''; ?>>XLS</option>
+                                        <option value="API" <?php echo (($template['source_type'] ?? 'XLS') === 'API') ? 'selected' : ''; ?>>API</option>
+                                    </select>
+                                    <small class="text-muted">Choose the source used by this template</small>
+                                </div>
+
+                                <div class="mb-3" id="headerRowWrapper">
                                     <label class="form-label"><?= htmlspecialchars($rowheader, ENT_QUOTES, 'UTF-8'); ?> *</label>
-                                    <input type="number" name="header_row" class="form-control" value="<?php echo $template['header_row']; ?>" required>
+                                    <input type="number" name="header_row" id="headerRow" class="form-control" value="<?php echo htmlspecialchars($template['header_row'] ?? ''); ?>">
                                 </div>
 
-                                <div class="mb-3">
-                                    <label class="form-label"><?= htmlspecialchars($columnheader, ENT_QUOTES, 'UTF-8'); ?>*</label>
-                                    <input type="text" name="start_column" class="form-control" value="<?php echo htmlspecialchars($template['start_column']); ?>" required>
+                                <div class="mb-3" id="startColumnWrapper">
+                                    <label class="form-label"><?= htmlspecialchars($columnheader, ENT_QUOTES, 'UTF-8'); ?> *</label>
+                                    <input type="text" name="start_column" id="startColumn" class="form-control" value="<?php echo htmlspecialchars($template['start_column'] ?? ''); ?>">
                                 </div>
 
                                 <div class="mb-3">
                                     <label class="form-label"><?= htmlspecialchars($desctemplate, ENT_QUOTES, 'UTF-8'); ?></label>
-                                    <textarea name="description" class="form-control"><?php echo htmlspecialchars($template['description']); ?></textarea>
+                                    <textarea name="description" class="form-control"><?php echo htmlspecialchars($template['description'] ?? ''); ?></textarea>
                                 </div>
 
                                 <div class="mb-3">
-                                    <label class="form-label"><?= htmlspecialchars($desttable, ENT_QUOTES, 'UTF-8'); ?>*</label>
-                                    <input type="text" name="target_table" class="form-control" value="<?php echo htmlspecialchars($template['target_table']); ?>" readonly required>
+                                    <label class="form-label"><?= htmlspecialchars($desttable, ENT_QUOTES, 'UTF-8'); ?> *</label>
+                                    <input type="text" name="target_table" class="form-control" value="<?php echo htmlspecialchars($template['target_table'] ?? 'datadb'); ?>" readonly required>
                                 </div>
 
                                 <div class="mb-3">
@@ -110,12 +123,12 @@ $routines = $stmt->fetchAll(PDO::FETCH_ASSOC);
 
                                 <div class="mb-3">
                                     <label class="form-label">Button Background Color</label>
-                                    <input type="color" name="button_bg_color" class="form-control" value="<?php echo htmlspecialchars($template['button_bg_color'] ?? '#007bff'); ?>">
+                                    <input type="color" name="button_bg_color" class="form-control form-control-color" value="<?php echo htmlspecialchars($template['button_bg_color'] ?? '#007bff'); ?>">
                                 </div>
 
                                 <div class="mb-3">
                                     <label class="form-label">Button Text Color</label>
-                                    <input type="color" name="button_text_color" class="form-control" value="<?php echo htmlspecialchars($template['button_text_color'] ?? '#ffffff'); ?>">
+                                    <input type="color" name="button_text_color" class="form-control form-control-color" value="<?php echo htmlspecialchars($template['button_text_color'] ?? '#ffffff'); ?>">
                                 </div>
 
                                 <div class="mb-3">
@@ -128,7 +141,7 @@ $routines = $stmt->fetchAll(PDO::FETCH_ASSOC);
                                     <select name="client_id" id="clientSelect" class="form-control" required>
                                         <option value="">Select a client...</option>
                                     </select>
-                                    <span id="clientLoadingStatus" class="text-muted" style="margin-left: 10px; display: none;">Recupero clienti in corso...</span>
+                                    <span id="clientLoadingStatus" class="text-muted" style="margin-left: 10px; display: none;">Loading clients...</span>
                                 </div>
 
                                 <div class="mb-3">
@@ -136,7 +149,7 @@ $routines = $stmt->fetchAll(PDO::FETCH_ASSOC);
                                     <select name="schema_id" id="schemaSelect" class="form-control" required>
                                         <option value="">Select a schema...</option>
                                     </select>
-                                    <span id="schemaLoadingStatus" class="text-muted" style="margin-left: 10px; display: none;">Caricamento schemi in corso...</span>
+                                    <span id="schemaLoadingStatus" class="text-muted" style="margin-left: 10px; display: none;">Loading schemas...</span>
                                 </div>
 
                                 <div class="mb-3">
@@ -144,11 +157,12 @@ $routines = $stmt->fetchAll(PDO::FETCH_ASSOC);
                                     <select name="idroutine" id="routineSelect" class="form-control">
                                         <option value="">Select a routine...</option>
                                         <?php foreach ($routines as $routine): ?>
-                                            <option value="<?php echo $routine['idroutine']; ?>" <?php echo ($template['idroutine'] ?? '') == $routine['idroutine'] ? 'selected' : ''; ?>>
+                                            <option value="<?php echo $routine['idroutine']; ?>" <?php echo (($template['idroutine'] ?? '') == $routine['idroutine']) ? 'selected' : ''; ?>>
                                                 <?php echo htmlspecialchars($routine['name']); ?>
                                             </option>
                                         <?php endforeach; ?>
                                     </select>
+
                                     <div id="routineDetails" class="mt-2" style="display: none;">
                                         <h6>Routine Details</h6>
                                         <p><strong>Name:</strong> <span id="routineName"></span></p>
@@ -166,8 +180,10 @@ $routines = $stmt->fetchAll(PDO::FETCH_ASSOC);
                         </div>
                     </div>
                 </div>
+
             </div>
         </div>
+
         <div class="overlay toggle-icon"></div>
         <a href="javaScript:;" class="back-to-top"><i class='bx bxs-up-arrow-alt'></i></a>
         <?php include('include/footer.php'); ?>
@@ -175,9 +191,8 @@ $routines = $stmt->fetchAll(PDO::FETCH_ASSOC);
 
     <script>
         document.addEventListener("DOMContentLoaded", function() {
-            // Verifica che jQuery sia caricato
             if (typeof jQuery === 'undefined') {
-                alert("Errore: jQuery non è caricato. Contatta l'amministratore.");
+                alert("Error: jQuery is not loaded.");
                 return;
             }
 
@@ -192,12 +207,15 @@ $routines = $stmt->fetchAll(PDO::FETCH_ASSOC);
             const routineAction2 = document.getElementById("routineAction2");
             const routineAction3 = document.getElementById("routineAction3");
 
-            if (!form || !clientLoadingStatus || !schemaLoadingStatus || !routineSelect || !routineDetails) {
-                alert("Errore: Uno o più elementi della pagina non sono stati trovati. Contatta l'amministratore.");
-                return;
-            }
+            const sourceType = document.getElementById("sourceType");
+            const headerRowWrapper = document.getElementById("headerRowWrapper");
+            const startColumnWrapper = document.getElementById("startColumnWrapper");
+            const headerRow = document.getElementById("headerRow");
+            const startColumn = document.getElementById("startColumn");
+
+            const selectedClientId = <?php echo json_encode((int)($template['idclient'] ?? 0)); ?>;
+            const selectedSchemaId = <?php echo json_encode((int)($template['idschema'] ?? 0)); ?>;
 
-            // Inizializza Select2
             $('#clientSelect').select2({
                 placeholder: "Search for a client...",
                 allowClear: true
@@ -213,108 +231,164 @@ $routines = $stmt->fetchAll(PDO::FETCH_ASSOC);
                 allowClear: true
             });
 
-            // Carica i clienti
+            function updateSourceFields() {
+                const selectedSource = sourceType.value;
+
+                if (selectedSource === 'API') {
+                    headerRowWrapper.style.opacity = '0.6';
+                    startColumnWrapper.style.opacity = '0.6';
+
+                    headerRow.required = false;
+                    startColumn.required = false;
+
+                    headerRow.disabled = true;
+                    startColumn.disabled = true;
+                } else {
+                    headerRowWrapper.style.opacity = '1';
+                    startColumnWrapper.style.opacity = '1';
+
+                    headerRow.required = true;
+                    startColumn.required = true;
+
+                    headerRow.disabled = false;
+                    startColumn.disabled = false;
+                }
+            }
+
+            sourceType.addEventListener('change', updateSourceFields);
+            updateSourceFields();
+
             async function loadClients() {
                 try {
                     clientLoadingStatus.style.display = 'inline';
-                    clientLoadingStatus.textContent = 'Recupero clienti in corso...';
+                    clientLoadingStatus.textContent = 'Loading clients...';
+
                     const response = await fetch("get_clienti.php", {
                         method: "GET",
                         headers: {
                             "Content-Type": "application/json"
                         }
                     });
+
                     const data = await response.json();
-                    if (!response.ok) throw new Error(data.error || `Errore HTTP: ${response.status}`);
+
+                    if (!response.ok) {
+                        throw new Error(data.error || `HTTP error: ${response.status}`);
+                    }
+
                     const select = document.getElementById("clientSelect");
                     select.innerHTML = '<option value="">Select a client...</option>';
+
                     data.value.forEach(client => {
-                        const nome = client.Nominativo || "Nome non disponibile";
-                        const id = client.IdCliente || "ID non disponibile";
+                        const nome = client.Nominativo || "Name not available";
+                        const id = client.IdCliente || "";
                         const option = new Option(`${nome.trim()} (ID: ${id})`, id);
-                        if (parseInt(id) === parseInt(<?php echo json_encode($template['idclient'] ?? 0); ?>)) {
+
+                        if (parseInt(id) === parseInt(selectedClientId)) {
                             option.selected = true;
                         }
+
                         select.add(option);
                     });
+
                     $(select).trigger('change');
-                    clientLoadingStatus.textContent = "Clienti caricati.";
+                    clientLoadingStatus.textContent = "Clients loaded.";
                 } catch (error) {
-                    clientLoadingStatus.textContent = "Errore nel caricamento.";
+                    clientLoadingStatus.textContent = "Loading error.";
+
                     Swal.fire({
-                        title: "Errore!",
-                        text: "Impossibile caricare i clienti: " + error.message,
+                        title: "Error!",
+                        text: "Unable to load clients: " + error.message,
                         icon: "error",
                         confirmButtonText: "OK"
                     });
                 } finally {
-                    setTimeout(() => clientLoadingStatus.style.display = 'none', 2000);
+                    setTimeout(() => clientLoadingStatus.style.display = 'none', 1500);
                 }
             }
 
-            // Carica gli schemi
             async function loadSchemas() {
                 try {
                     schemaLoadingStatus.style.display = 'inline';
-                    schemaLoadingStatus.textContent = 'Caricamento schemi in corso...';
+                    schemaLoadingStatus.textContent = 'Loading schemas...';
+
                     const response = await fetch("get_schemi.php", {
                         method: "GET",
                         headers: {
                             "Content-Type": "application/json"
                         }
                     });
+
                     const data = await response.json();
-                    if (!response.ok) throw new Error(data.error || `Errore HTTP: ${response.status}`);
+
+                    if (!response.ok) {
+                        throw new Error(data.error || `HTTP error: ${response.status}`);
+                    }
+
                     const select = document.getElementById("schemaSelect");
                     select.innerHTML = '<option value="">Select a schema...</option>';
-                    data.value.forEach(schema => {
-                        const nome = schema.Nome || "Nome non disponibile";
-                        const id = schema.IdSchemaCustomFields || "ID non disponibile";
+
+                    const sortedSchemas = [...data.value].sort((a, b) => {
+                        const nomeA = (a.Nome || "").trim().toLowerCase();
+                        const nomeB = (b.Nome || "").trim().toLowerCase();
+                        return nomeA.localeCompare(nomeB, 'it', {
+                            sensitivity: 'base'
+                        });
+                    });
+
+                    sortedSchemas.forEach(schema => {
+                        const nome = schema.Nome || "Name not available";
+                        const id = schema.IdSchemaCustomFields || "";
                         const option = new Option(`${nome.trim()} (ID: ${id})`, id);
-                        if (parseInt(id) === parseInt(<?php echo json_encode($template['idschema'] ?? 0); ?>)) {
+
+                        if (parseInt(id) === parseInt(selectedSchemaId)) {
                             option.selected = true;
                         }
+
                         select.add(option);
                     });
+
                     $(select).trigger('change');
-                    schemaLoadingStatus.textContent = "Schemi caricati.";
+                    schemaLoadingStatus.textContent = "Schemas loaded.";
                 } catch (error) {
-                    schemaLoadingStatus.textContent = "Errore nel caricamento.";
+                    schemaLoadingStatus.textContent = "Loading error.";
+
                     Swal.fire({
-                        title: "Errore!",
-                        text: "Impossibile caricare gli schemi: " + error.message,
+                        title: "Error!",
+                        text: "Unable to load schemas: " + error.message,
                         icon: "error",
                         confirmButtonText: "OK"
                     });
                 } finally {
-                    setTimeout(() => schemaLoadingStatus.style.display = 'none', 2000);
+                    setTimeout(() => schemaLoadingStatus.style.display = 'none', 1500);
                 }
             }
 
-            // Carica i dati
             async function loadData() {
                 try {
                     await loadClients();
                     await loadSchemas();
                 } catch (error) {
                     Swal.fire({
-                        title: "Errore!",
-                        text: "Errore nel caricamento dei dati: " + error.message,
+                        title: "Error!",
+                        text: "Error while loading data: " + error.message,
                         icon: "error",
                         confirmButtonText: "OK"
                     });
                 }
             }
+
             loadData();
 
-            // Routine dettagli
             const routines = <?php echo json_encode($routines); ?>;
 
             function updateRoutineDetails() {
                 const selectedId = routineSelect.value;
                 routineDetails.style.display = selectedId ? 'block' : 'none';
+
                 if (selectedId) {
                     const routine = routines.find(r => r.idroutine == selectedId);
+
                     if (routine) {
                         routineName.textContent = routine.name || 'N/A';
                         routineDescription.textContent = routine.description || 'N/A';
@@ -336,10 +410,10 @@ $routines = $stmt->fetchAll(PDO::FETCH_ASSOC);
                     routineAction3.textContent = '';
                 }
             }
-            routineSelect.addEventListener('change', updateRoutineDetails);
-            updateRoutineDetails(); // Inizializza dettagli se una routine è preselezionata
 
-            // Submit del form
+            routineSelect.addEventListener('change', updateRoutineDetails);
+            updateRoutineDetails();
+
             form.addEventListener("submit", function(e) {
                 e.preventDefault();
 
@@ -351,8 +425,8 @@ $routines = $stmt->fetchAll(PDO::FETCH_ASSOC);
 
                 if (!clientId) {
                     Swal.fire({
-                        title: "Errore!",
-                        text: "Per favore seleziona un cliente.",
+                        title: "Error!",
+                        text: "Please select a client.",
                         icon: "error",
                         confirmButtonText: "OK"
                     });
@@ -373,8 +447,8 @@ $routines = $stmt->fetchAll(PDO::FETCH_ASSOC);
 
                 if (!schemaId) {
                     Swal.fire({
-                        title: "Errore!",
-                        text: "Per favore seleziona uno schema.",
+                        title: "Error!",
+                        text: "Please select a schema.",
                         icon: "error",
                         confirmButtonText: "OK"
                     });
@@ -387,10 +461,10 @@ $routines = $stmt->fetchAll(PDO::FETCH_ASSOC);
                     const nameMatch = optionText.match(/^(.+?)(?:\s*\(ID:\s*\d+\))?$/);
                     schemaName = nameMatch ? nameMatch[1].trim() : optionText;
                 }
+
                 formData.append("idschema", schemaId);
                 formData.append("schemaname", schemaName);
 
-                // Aggiungi idroutine
                 const routineId = routineSelect.value;
                 formData.append("idroutine", routineId);
 
@@ -402,8 +476,8 @@ $routines = $stmt->fetchAll(PDO::FETCH_ASSOC);
                     .then(data => {
                         if (data.success) {
                             Swal.fire({
-                                title: "Successo!",
-                                text: "Template aggiornato con successo!",
+                                title: "Success!",
+                                text: "Template updated successfully!",
                                 icon: "success",
                                 confirmButtonText: "OK"
                             }).then(() => {
@@ -411,17 +485,17 @@ $routines = $stmt->fetchAll(PDO::FETCH_ASSOC);
                             });
                         } else {
                             Swal.fire({
-                                title: "Errore!",
+                                title: "Error!",
                                 text: data.message,
                                 icon: "error",
                                 confirmButtonText: "OK"
                             });
                         }
                     })
-                    .catch(error => {
+                    .catch(() => {
                         Swal.fire({
-                            title: "Errore!",
-                            text: "Si è verificato un errore imprevisto.",
+                            title: "Error!",
+                            text: "An unexpected error occurred.",
                             icon: "error",
                             confirmButtonText: "OK"
                         });
diff --git a/public/userarea/process_edit_template_xls.php b/public/userarea/process_edit_template_xls.php
index 3722783..becdcfe 100644
--- a/public/userarea/process_edit_template_xls.php
+++ b/public/userarea/process_edit_template_xls.php
@@ -9,46 +9,76 @@ try {
         throw new Exception("Invalid request method.");
     }
 
-    // Recupera e sanifica i dati
-    $id = intval($_POST['id']);
-    $name = trim($_POST['name']);
-    $header_row = intval($_POST['header_row']);
-    $start_column = trim($_POST['start_column']);
+    // Retrieve and sanitize form data
+    $id = intval($_POST['id'] ?? 0);
+    $name = trim($_POST['name'] ?? '');
+    $source_type = strtoupper(trim($_POST['source_type'] ?? 'XLS'));
+    $header_row = isset($_POST['header_row']) && $_POST['header_row'] !== '' ? intval($_POST['header_row']) : null;
+    $start_column = trim($_POST['start_column'] ?? '');
     $description = trim($_POST['description'] ?? '');
-    $target_table = trim($_POST['target_table']);
-    $idclient = intval($_POST['client_id'] ?? 0); // Usa client_id dal form
-    $clientname = trim($_POST['client_name'] ?? ''); // Usa client_name dal form
-    $idschema = intval($_POST['idschema'] ?? 0); // Nuovo campo
-    $schemaname = trim($_POST['schemaname'] ?? ''); // Corretto da schemamaname
-    $idroutine = isset($_POST['idroutine']) && $_POST['idroutine'] !== '' ? intval($_POST['idroutine']) : null; // Aggiunto idroutine
-    $button_size = trim($_POST['button_size'] ?? 'medium'); // Nuovo campo
-    $button_bg_color = trim($_POST['button_bg_color'] ?? '#007bff'); // Nuovo campo
-    $button_text_color = trim($_POST['button_text_color'] ?? '#ffffff'); // Nuovo campo
-    $button_label = trim($_POST['button_label'] ?? 'Click Me'); // Nuovo campo
+    $target_table = trim($_POST['target_table'] ?? 'datadb');
+    $idclient = intval($_POST['client_id'] ?? 0);
+    $clientname = trim($_POST['client_name'] ?? '');
+    $idschema = intval($_POST['idschema'] ?? 0);
+    $schemaname = trim($_POST['schemaname'] ?? '');
+    $idroutine = isset($_POST['idroutine']) && $_POST['idroutine'] !== '' ? intval($_POST['idroutine']) : null;
+    $button_size = trim($_POST['button_size'] ?? 'medium');
+    $button_bg_color = trim($_POST['button_bg_color'] ?? '#007bff');
+    $button_text_color = trim($_POST['button_text_color'] ?? '#ffffff');
+    $button_label = trim($_POST['button_label'] ?? 'Click Me');
 
-    // Controllo sui campi obbligatori
-    if (empty($id) || empty($name) || empty($header_row) || empty($start_column) || empty($target_table) || $idschema <= 0) {
-        throw new Exception("All fields marked with * are required, including schema.");
+    if (!in_array($source_type, ['XLS', 'API'], true)) {
+        $source_type = 'XLS';
     }
 
-    // Validazione del idclient
-    if ($idclient <= 0) {
-        throw new Exception("Please select a valid client.");
+    // Required fields validation
+    if ($id <= 0 || $name === '' || $target_table === '' || $idclient <= 0 || $idschema <= 0) {
+        throw new Exception("All fields marked with * are required, including client and schema.");
     }
 
-    // Connessione al database
+    // XLS-only validation
+    if ($source_type === 'XLS') {
+        if ($header_row === null || $header_row <= 0 || $start_column === '') {
+            throw new Exception("Header Row and Start Column are required for XLS templates.");
+        }
+    }
+
+    // API templates do not require XLS coordinates
+    if ($source_type === 'API') {
+        $header_row = null;
+        $start_column = null;
+    }
+
+    // Database connection
     $db = DBHandlerSelect::getInstance();
     $pdo = $db->getConnection();
 
-    // Aggiorna il database, includendo i nuovi campi
-    $stmt = $pdo->prepare("UPDATE excel_templates 
-                           SET name = ?, header_row = ?, start_column = ?, description = ?, target_table = ?, 
-                               idclient = ?, clientname = ?, schemaname = ?, idschema = ?, idroutine = ?, 
-                               button_size = ?, button_bg_color = ?, button_text_color = ?, button_label = ?, 
-                               updated_at = NOW() 
-                           WHERE id = ?");
+    // Update template
+    $stmt = $pdo->prepare("
+        UPDATE excel_templates
+        SET
+            name = ?,
+            source_type = ?,
+            header_row = ?,
+            start_column = ?,
+            description = ?,
+            target_table = ?,
+            idclient = ?,
+            clientname = ?,
+            schemaname = ?,
+            idschema = ?,
+            idroutine = ?,
+            button_size = ?,
+            button_bg_color = ?,
+            button_text_color = ?,
+            button_label = ?,
+            updated_at = NOW()
+        WHERE id = ?
+    ");
+
     $stmt->execute([
         $name,
+        $source_type,
         $header_row,
         $start_column,
         $description,
@@ -65,12 +95,10 @@ try {
         $id
     ]);
 
-    // rowCount potrebbe essere 0 se non ci sono modifiche, quindi consideriamo comunque un successo
     $response["success"] = true;
     $response["message"] = "Template updated successfully!";
 } catch (Exception $e) {
     $response["message"] = $e->getMessage();
 }
 
-// Restituisce un JSON per il fetch
 echo json_encode($response);