diff --git a/app/api.py b/app/api.py
index 9f4309c..aa3545d 100644
--- a/app/api.py
+++ b/app/api.py
@@ -330,31 +330,64 @@ def download_mod():
     server_version = data['version']
 
     base_path = f"./servers/mc-{username}/{'plugins' if server_type == 'paper' else 'mods'}"
+    os.makedirs(base_path, exist_ok=True)
 
-    downloaded = []
+    downloaded_files = []
+    visited_versions = set()
 
     def download_project(pid, version_id=None):
         if version_id:
             version_data = requests.get(f"https://api.modrinth.com/v2/version/{version_id}").json()
         else:
             all_versions = requests.get(f"https://api.modrinth.com/v2/project/{pid}/version").json()
-            version_data = next((v for v in all_versions if server_version in v['game_versions'] and server_type in v['loaders']), None)
+            version_data = next(
+                (v for v in all_versions
+                 if server_version in v['game_versions']
+                 and server_type in v['loaders']
+                 and v.get('server_side') != 'unsupported'),
+                None)
             if not version_data:
+                print(f"[SKIP] No compatible version found for {pid}")
                 return
 
-        file = version_data['files'][0]
-        file_path = f"{base_path}/{file['filename']}"
-        if file['filename'] not in downloaded:
+        if version_data["id"] in visited_versions:
+            return
+        visited_versions.add(version_data["id"])
+
+        if version_data.get('server_side') == 'unsupported':
+            print(f"[SKIP] {version_data.get('name', 'Nieznana nazwa')} is client-only")
+            return
+
+        file = next((f for f in version_data['files'] if f.get('primary', True)), version_data['files'][0])
+        file_path = os.path.join(base_path, file['filename'])
+
+        if not os.path.exists(file_path):
+            print(f"[DOWNLOAD] {file['filename']}")
             with requests.get(file['url'], stream=True) as r:
                 with open(file_path, 'wb') as f:
                     for chunk in r.iter_content(chunk_size=8192):
                         f.write(chunk)
-            downloaded.append(file['filename'])
+
+        downloaded_files.append({
+            "filename": file['filename'],
+            "name": version_data.get("name") or version_data.get("version_number") or "Nieznana wersja",
+            "project_id": version_data["project_id"],
+            "version_id": version_data["id"]
+        })
 
         for dep in version_data.get('dependencies', []):
             if dep.get('version_id'):
-                download_project(dep['project_id'], dep['version_id'])
+                try:
+                    download_project(dep['project_id'], dep['version_id'])
+                except Exception as e:
+                    print(f"[ERROR] Failed to fetch dep version {dep['version_id']}: {e}")
+            elif dep.get('project_id'):
+                try:
+                    download_project(dep['project_id'])
+                except Exception as e:
+                    print(f"[ERROR] Failed to fetch dep project {dep['project_id']}: {e}")
 
     download_project(project_id)
 
-    return jsonify({"success": True, "downloaded": downloaded})
+    return jsonify({"success": True, "downloaded": downloaded_files})
+
diff --git a/app/static/js/mods.js b/app/static/js/mods.js
index cd89b60..c6e5992 100644
--- a/app/static/js/mods.js
+++ b/app/static/js/mods.js
@@ -33,36 +33,36 @@ function searchMods() {
 }
 
 function installMod(projectId) {
-        fetch('/api/config')
-        .then(response => response.json())
-        .then(configData => {
-            console.log(configData);
-            if (configData.success) {
-                const serverType = configData.type;
-                const serverVersion = configData.version;
-                if (serverType && serverVersion) {
-                    fetch('/api/modrinth/download', {
-                        method: 'POST',
-                        headers: { 'Content-Type': 'application/json' },
-                        body: JSON.stringify({ project_id: projectId, username, type: serverType, version: serverVersion }),
-                    })
-                    .then(r => r.json())
-                    .then(data => {
-                        if (data.success) {
-                            alert(`Zainstalowano: ${data.file}`);
-                            loadFileList();
-                        } else {
-                            alert("Nie udało się zainstalować moda.");
-                        }
-                    });
-                } else {
-                    console.error('Server type or version not available');
-                }
+    fetch('/api/config')
+    .then(response => response.json())
+    .then(configData => {
+        if (configData.success) {
+            const serverType = configData.type;
+            const serverVersion = configData.version;
+            if (serverType && serverVersion) {
+                fetch('/api/modrinth/download', {
+                    method: 'POST',
+                    headers: { 'Content-Type': 'application/json' },
+                    body: JSON.stringify({ project_id: projectId, username, type: serverType, version: serverVersion }),
+                })
+                .then(r => r.json())
+                .then(data => {
+                    if (data.success) {
+                        const modFiles = data.downloaded.map(mod => "- " + mod.filename).join("\n");
+                        alert(`Zainstalowano:\n${modFiles}`);
+                        loadFileList();
+                    } else {
+                        alert("Nie udało się zainstalować moda.");
+                    }
+                });
             } else {
-                console.error('Server config not found');
+                console.error('Server type or version not available');
             }
-        })
-        .catch(err => {
-            console.error('Error fetching server config:', err);
-        });
+        } else {
+            console.error('Server config not found');
+        }
+    })
+    .catch(err => {
+        console.error('Error fetching server config:', err);
+    });
 }
\ No newline at end of file