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backend/app/schemas/departure.py

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+from pydantic import BaseModel, validator
+from datetime import datetime
+from typing import Optional
+from enum import Enum
+
+
+class DepartureStatus(str, Enum):
+    BOOKED_OUT = "BOOKED_OUT"
+    DEPARTED = "DEPARTED"
+    CANCELLED = "CANCELLED"
+
+
+class DepartureBase(BaseModel):
+    registration: str
+    type: Optional[str] = None
+    callsign: Optional[str] = None
+    pob: int
+    out_to: str
+    notes: Optional[str] = None
+
+    @validator('registration')
+    def validate_registration(cls, v):
+        if not v or len(v.strip()) == 0:
+            raise ValueError('Aircraft registration is required')
+        return v.strip().upper()
+
+    @validator('out_to')
+    def validate_out_to(cls, v):
+        if not v or len(v.strip()) == 0:
+            raise ValueError('Destination airport is required')
+        return v.strip()
+
+    @validator('pob')
+    def validate_pob(cls, v):
+        if v is not None and v < 1:
+            raise ValueError('Persons on board must be at least 1')
+        return v
+
+
+class DepartureCreate(DepartureBase):
+    pass
+
+
+class DepartureUpdate(BaseModel):
+    type: Optional[str] = None
+    callsign: Optional[str] = None
+    pob: Optional[int] = None
+    out_to: Optional[str] = None
+    notes: Optional[str] = None
+
+
+class DepartureStatusUpdate(BaseModel):
+    status: DepartureStatus
+    timestamp: Optional[datetime] = None
+
+
+class Departure(DepartureBase):
+    id: int
+    status: DepartureStatus
+    booked_out_dt: datetime
+    departure_dt: Optional[datetime] = None
+    created_by: Optional[str] = None
+    updated_at: datetime
+
+    class Config:
+        from_attributes = True