From 564122df0a3211ea416a9b79da21c55aca9ad871 Mon Sep 17 00:00:00 2001
From: Carsten Kvist <carsten@familienkvist.dk>
Date: Sun, 12 Apr 2026 12:09:13 +0200
Subject: [PATCH] Windows

---
 linedance-app/local/file_watcher.py | 21 ++++++++++++++++++---
 linedance-app/ui/main_window.py     | 12 ++++--------
 2 files changed, 22 insertions(+), 11 deletions(-)

diff --git a/linedance-app/local/file_watcher.py b/linedance-app/local/file_watcher.py
index 119541b5..f47ef0e0 100644
--- a/linedance-app/local/file_watcher.py
+++ b/linedance-app/local/file_watcher.py
@@ -127,15 +127,30 @@ class LibraryWatcher:
             self._full_scan_all()
             return
 
-        self._observer = Observer()
-        libraries = get_libraries(active_only=True)
+        import sqlite3
+        from local.local_db import DB_PATH
+        conn = sqlite3.connect(str(DB_PATH))
+        conn.row_factory = sqlite3.Row
+        libraries = conn.execute(
+            "SELECT id, path FROM libraries WHERE is_active=1"
+        ).fetchall()
+        conn.close()
+
+        if not libraries:
+            logger.info("Ingen biblioteker — springer watchdog over")
+            self._running = True
+            return
+
+        # Brug længere poll-interval på Windows for at spare handles
+        import sys
+        poll_interval = 30 if sys.platform == "win32" else 5
+        self._observer = Observer(timeout=poll_interval)
 
         for lib in libraries:
             path = Path(lib["path"])
             if not path.exists():
                 logger.warning(f"Bibliotek findes ikke: {path}")
                 continue
-
             handler = MusicLibraryHandler(lib["id"], self.on_change)
             self._observer.schedule(handler, str(path), recursive=True)
             logger.info(f"Overvåger: {path}")
diff --git a/linedance-app/ui/main_window.py b/linedance-app/ui/main_window.py
index 7447d766..d6faa719 100644
--- a/linedance-app/ui/main_window.py
+++ b/linedance-app/ui/main_window.py
@@ -397,13 +397,8 @@ class MainWindow(QMainWindow):
                 from local.file_watcher import get_watcher
 
                 def on_file_change(event_type, path, song_id):
-                    # QMetaObject.invokeMethod er den korrekte måde at kalde
-                    # en slot fra en ikke-GUI-tråd
-                    from PyQt6.QtCore import QMetaObject, Qt
-                    QMetaObject.invokeMethod(
-                        self._reload_timer, "start",
-                        Qt.ConnectionType.QueuedConnection
-                    )
+                    # Brug signal — den eneste 100% thread-safe metode på Windows
+                    self._file_changed_signal.emit()
 
                 watcher = get_watcher(on_change=on_file_change)
                 watcher.start()
@@ -436,7 +431,8 @@ class MainWindow(QMainWindow):
         QTimer.singleShot(200, self._reload_library)
 
     # Signal til at opdatere biblioteket fra baggrundstråd
-    _library_loaded = __import__('PyQt6.QtCore', fromlist=['pyqtSignal']).pyqtSignal(list)
+    _library_loaded    = __import__('PyQt6.QtCore', fromlist=['pyqtSignal']).pyqtSignal(list)
+    _file_changed_signal = __import__('PyQt6.QtCore', fromlist=['pyqtSignal']).pyqtSignal()
 
     def _reload_library(self):
         """Hent sange fra DB i baggrundstråd — thread-safe via signal."""