fix time estimate code

Author: johnnyshankman

src/renderer/components/Main.tsx

@@ -59,14 +59,20 @@ export default function Main() {
   });
   const [importState, setImportState] = useState({
     songsImported: 0,
-    totalSongs: 0,
+    totalSongs: 1,
     estimatedTimeRemainingString: '',
   });
   const [showAlbumArtMenu, setShowAlbumArtMenu] = useState<AlbumArtMenuState>();
 
   const importNewLibrary = async (rescan = false) => {
     setDialogState((prev) => ({ ...prev, showImportingProgress: true }));
 
+    setImportState((prev) => ({
+      ...prev,
+      songsImported: 0,
+      totalSongs: 1,
+    }));
+
     window.electron.ipcRenderer.sendMessage('select-library', {
       rescan,
     });
@@ -78,18 +84,29 @@ export default function Main() {
         totalSongs: args.totalSongs,
       }));
 
-      // Calculate estimated time remaining
-      const timePerSong = 0.1; // seconds per song (approximate)
-      const remainingSongs = args.totalSongs - args.songsImported;
-      const estimatedSeconds = remainingSongs * timePerSong;
-      const minutes = Math.floor(estimatedSeconds / 60);
-      const seconds = Math.floor(estimatedSeconds % 60);
+      // Average time per song based on testing:
+      // - ~3ms for metadata parsing
+      // - ~6ms for file copy (if needed)
+      // - ~1ms overhead
+      const avgTimePerSong = 10; // milliseconds
+      const estimatedTimeRemaining = Math.floor(
+        (args.totalSongs - args.songsImported) * avgTimePerSong,
+      );
+
+      const minutes = Math.floor(estimatedTimeRemaining / 60000);
+      const seconds = Math.floor((estimatedTimeRemaining % 60000) / 1000);
+
+      const timeRemainingString =
+        // eslint-disable-next-line no-nested-ternary
+        minutes < 1
+          ? seconds === 0
+            ? 'Processing Metadata...'
+            : `${seconds}s left`
+          : `${minutes}m ${seconds}s left`;
 
       setImportState((prev) => ({
         ...prev,
-        estimatedTimeRemainingString: `${minutes}:${seconds
-          .toString()
-          .padStart(2, '0')}`,
+        estimatedTimeRemainingString: timeRemainingString,
       }));
     });