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app/models.py

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+# models.py
+from pydantic import BaseModel, Field, validator
+from typing import Optional, List
+import db
+
+
+class Video(BaseModel):
+    file_name: str
+    raw_file: str = Field(..., description="Identifiant unique de la vidéo")
+    duration: Optional[float] = None
+    mp4_file: Optional[str] = None
+    mp4_file_name: Optional[str] = None
+    rotated_file: Optional[str] = None
+    thumbnail_file: Optional[str] = None
+    record_datetime: Optional[str] = None
+    day_of_week: Optional[str] = None
+    lat: Optional[float] = None
+    long: Optional[float] = None
+    address: Optional[str] = None
+    difficulty_level: Optional[str] = Field("Tout niveau", description="Niveau de difficulté")
+
+    # --- propriétés pratiques ---
+    @property
+    def id(self) -> str:
+        """Identifiant unique (basé sur file_name)."""
+        return self.file_name
+
+    @property
+    def title(self) -> str:
+        """Nom court à afficher."""
+        return self.mp4_file_name or self.file_name
+    
+    @property
+    def difficulty_display(self) -> str:
+        return self.difficulty_level or "Tout niveau"
+
+    # --- Méthodes métiers ---
+    def load_labels(self) -> List[str]:
+        return db.load_video_labels(self.file_name)
+
+    def save_labels(self, label_names: List[str]):
+        db.save_video_labels(self.file_name, label_names)
+
+    # --- Validation optionnelle ---
+    @validator("raw_file")
+    def validate_raw_file(cls, v):
+        if not v or not isinstance(v, str):
+            raise ValueError("raw_file doit être une chaîne non vide")
+        return v
+
+    @validator("duration")
+    def validate_duration(cls, v):
+        if v is not None and v < 0:
+            raise ValueError("duration ne peut pas être négative")
+        return v