fixing models

app/models.py

@@ -1,4 +1,3 @@
-# app/models.py
 from __future__ import annotations
 from typing import List, Optional
 from datetime import datetime, timezone
@@ -13,7 +12,7 @@ class Message(BaseModel):
 class ChatRequest(BaseModel):
     message: str
     history: List[Message] = Field(default_factory=list)
-    username: str = "Baka"
+    username: Optional[str] = "Vinsen"
 
 # ====== Device register ======
 class RegisterRequest(BaseModel):
@@ -23,12 +22,18 @@ class RegisterRequest(BaseModel):
 class ScheduleRequest(BaseModel):
     fcm_token: str
     task: str
-    scheduled_time: datetime  # 🚀 UBAH JADI 'scheduled_time' biar cocok sama Android!
+    scheduled_time: str  # 🚀 UBAH JADI String DULU BIAR FASTAPI NGGAK LANGSUNG BENTROK 422!
 
-    # Helper: konversi ke UTC buat scheduler
     @property
     def remind_at_utc(self) -> datetime:
-        # Jika datetime naive (tanpa timezone), beri default UTC / Asia/Jakarta
-        if self.scheduled_time.tzinfo is None:
-            return self.scheduled_time.replace(tzinfo=timezone.utc)
-        return self.scheduled_time.astimezone(timezone.utc)
+        # Parse string ISO dari Android ke datetime UTC secara manual & aman
+        try:
+            # Handle ISO String dari Instant.now().toString()
+            clean_ts = self.scheduled_time.replace("Z", "+00:00")
+            dt = datetime.fromisoformat(clean_ts)
+            if dt.tzinfo is None:
+                return dt.replace(tzinfo=timezone.utc)
+            return dt.astimezone(timezone.utc)
+        except Exception:
+            # Fallback jika parsing gagal: 1 menit dari sekarang
+            return datetime.now(timezone.utc)