various improvements to make release 1 complete

includes/class-swi-foot-api.php

@@ -9,6 +9,7 @@ class Swi_Foot_API
     private $verein_id;
     private $season_id;
     private $cache_duration;
+    private $language;
 
     public function __construct()
     {
@@ -18,6 +19,7 @@ class Swi_Foot_API
         $this->verein_id = get_option('swi_foot_verein_id');
         $this->season_id = get_option('swi_foot_season_id', date('Y'));
         $this->cache_duration = get_option('swi_foot_match_cache_duration', 30);
+        $this->language = get_option('swi_foot_api_language', '1');
 
         // AJAX actions were migrated to REST endpoints (see includes/class-swi-foot-rest.php)
 
@@ -176,6 +178,7 @@ class Swi_Foot_API
         $response = wp_remote_get($url, array(
             'headers' => array(
                 'X-User-Token' => $token,
+                'X-User-Language' => $this->language,
                 'Content-Type' => 'application/json'
             ),
             'timeout' => 30
@@ -204,7 +207,13 @@ class Swi_Foot_API
         if ($response_code !== 200) {
             $body_debug = wp_remote_retrieve_body($response);
             error_log('Swiss Football API: Request to ' . $url . ' returned ' . $response_code . ' - body: ' . substr($body_debug, 0, 1000));
-            return new WP_Error('api_error', 'API request failed with code ' . $response_code);
+            
+            // Handle 406 Not Acceptable - data not yet available
+            if ($response_code === 406) {
+                return new WP_Error('data_not_available', 'Data not yet available', array('status_code' => 406));
+            }
+            
+            return new WP_Error('api_error', 'API request failed with code ' . $response_code, array('status_code' => $response_code));
         }
 
         $body = wp_remote_retrieve_body($response);
@@ -348,6 +357,11 @@ class Swi_Foot_API
         return $this->api_request('/api/match/' . $match_id . '/events');
     }
 
+    public function get_match_referees($match_id)
+    {
+        return $this->api_request('/api/match/' . $match_id . '/referees');
+    }
+
     public function get_team_picture($team_id)
     {
         // Special handling for team picture endpoint which returns 200 with data or 204 No Content
@@ -364,6 +378,7 @@ class Swi_Foot_API
         $response = wp_remote_get($url, array(
             'headers' => array(
                 'X-User-Token' => $token,
+                'X-User-Language' => $this->language,
                 'Content-Type' => 'application/json'
             ),
             'timeout' => 30
@@ -410,9 +425,9 @@ class Swi_Foot_API
         return $body;
     }
 
-    public function get_commons_ids()
+    public function get_common_ids($params = array())
     {
-        return $this->api_request('/api/commons/ids');
+        return $this->api_request('/api/common/ids', $params);
     }
 
     /**
@@ -441,17 +456,54 @@ class Swi_Foot_API
      */
     public function test_connection()
     {
-        // Actually test the connection by making an API request
-        $result = $this->api_request('/api/teams', array('vereinId' => $this->verein_id));
-        
-        // Check if the request was successful (not an error)
-        if (is_wp_error($result)) {
-            error_log('Swiss Football API: Connection test failed - ' . $result->get_error_message());
-            return false;
+        // First, check if credentials are configured
+        if (empty($this->username) || empty($this->password)) {
+            return array(
+                'success' => false,
+                'error' => 'API credentials not configured',
+                'details' => 'Please configure API Username and Password in Settings → Swiss Football'
+            );
+        }
+
+        // Check if Verein ID is configured
+        if (empty($this->verein_id)) {
+            return array(
+                'success' => false,
+                'error' => 'Verein ID (Club ID) not configured',
+                'details' => 'Please configure Verein ID in Settings → Swiss Football'
+            );
         }
         
-        // Verify we got a response (array means success)
-        return is_array($result);
+        // Test connection using the /api/common/ids endpoint with required parameters
+        $result = $this->get_common_ids(array(
+            'ClubId' => $this->verein_id,
+            'Language' => 1  // 1 = German
+        ));
+        
+        if (is_wp_error($result)) {
+            $error_msg = $result->get_error_message();
+            error_log('Swiss Football API: Connection test failed - ' . $error_msg);
+            
+            return array(
+                'success' => false,
+                'error' => 'API connection failed',
+                'details' => $error_msg
+            );
+        }
+        
+        if (!is_array($result)) {
+            return array(
+                'success' => false,
+                'error' => 'Invalid API response',
+                'details' => 'The API returned unexpected data format'
+            );
+        }
+        
+        return array(
+            'success' => true,
+            'error' => null,
+            'details' => 'Connection successful!'
+        );
     }
 
     public function get_current_match($team_id)