fix(windscribevpn): add error handling for unsupported regions in get_proxy method

Pre-process space-hyphen-space patterns (e.g., "Title - Episode") before other character replacements to prevent creating problematic dot-hyphen-dot (.-.) patterns in filenames.

This addresses PR #44 by fixing the root cause rather than post-processing the problematic pattern. The fix ensures that titles like "Show - S01E01" become "Show.S01E01"

unshackle/commands/dl.py

@@ -1847,25 +1847,32 @@ class dl:
         if not drm:
             return
 
+        track_quality = None
         if isinstance(track, Video) and track.height:
-            pass
+            track_quality = track.height
 
         if isinstance(drm, Widevine):
             if not isinstance(self.cdm, (WidevineCdm, DecryptLabsRemoteCDM)) or (
                 isinstance(self.cdm, DecryptLabsRemoteCDM) and self.cdm.is_playready
             ):
-                widevine_cdm = self.get_cdm(self.service, self.profile, drm="widevine")
+                widevine_cdm = self.get_cdm(self.service, self.profile, drm="widevine", quality=track_quality)
                 if widevine_cdm:
-                    self.log.info("Switching to Widevine CDM for Widevine content")
+                    if track_quality:
+                        self.log.info(f"Switching to Widevine CDM for Widevine {track_quality}p content")
+                    else:
+                        self.log.info("Switching to Widevine CDM for Widevine content")
                     self.cdm = widevine_cdm
 
         elif isinstance(drm, PlayReady):
             if not isinstance(self.cdm, (PlayReadyCdm, DecryptLabsRemoteCDM)) or (
                 isinstance(self.cdm, DecryptLabsRemoteCDM) and not self.cdm.is_playready
             ):
-                playready_cdm = self.get_cdm(self.service, self.profile, drm="playready")
+                playready_cdm = self.get_cdm(self.service, self.profile, drm="playready", quality=track_quality)
                 if playready_cdm:
-                    self.log.info("Switching to PlayReady CDM for PlayReady content")
+                    if track_quality:
+                        self.log.info(f"Switching to PlayReady CDM for PlayReady {track_quality}p content")
+                    else:
+                        self.log.info("Switching to PlayReady CDM for PlayReady content")
                     self.cdm = playready_cdm
 
         if isinstance(drm, Widevine):

unshackle/core/proxies/windscribevpn.py

@@ -44,9 +44,17 @@ class WindscribeVPN(Proxy):
     def get_proxy(self, query: str) -> Optional[str]:
         """
         Get an HTTPS proxy URI for a WindscribeVPN server.
+
+        Note: Windscribe's static OpenVPN credentials only work on US servers.
         """
         query = query.lower()
 
+        if query != "us" and query not in self.server_map:
+            raise ValueError(
+                f"Windscribe proxy does not currently support the '{query.upper()}' region. "
+                "Only US servers are supported with static OpenVPN credentials. "
+            )
+
         if query in self.server_map:
             hostname = self.server_map[query]
         else:

unshackle/core/utilities.py

@@ -127,6 +127,8 @@ def sanitize_filename(filename: str, spacer: str = ".") -> str:
     # remove or replace further characters as needed
     filename = "".join(c for c in filename if unicodedata.category(c) != "Mn")  # hidden characters
     filename = filename.replace("/", " & ").replace(";", " & ")  # e.g. multi-episode filenames
+    if spacer == ".":
+        filename = re.sub(r" - ", spacer, filename)  # title separators to spacer (avoids .-. pattern)
     filename = re.sub(r"[:; ]", spacer, filename)  # structural chars to (spacer)
     filename = re.sub(r"[\\*!?¿,'\"" "()<>|$#~]", "", filename)  # not filename safe chars
     filename = re.sub(rf"[{spacer}]{{2,}}", spacer, filename)  # remove extra neighbouring (spacer)s