# Feature: Flight & Waypoint Management

## Description
Core CRUD operations for flights and waypoints. Handles flight creation with satellite prefetching trigger, flight state management, waypoint updates, and data validation. This is the primary data management feature of the Flight Lifecycle Manager.

## Component APIs Implemented

### Flight Lifecycle
- `create_flight(flight_data: FlightData) -> str` - Creates flight, validates data, sets ENU origin, triggers satellite prefetching
- `get_flight(flight_id: str) -> Optional[Flight]` - Retrieves flight by ID
- `get_flight_state(flight_id: str) -> Optional[FlightState]` - Retrieves current flight state
- `delete_flight(flight_id: str) -> bool` - Deletes flight and associated resources
- `update_flight_status(flight_id: str, status: FlightStatusUpdate) -> bool` - Updates flight status

### Waypoint Management
- `update_waypoint(flight_id: str, waypoint_id: str, waypoint: Waypoint) -> bool` - Updates single waypoint
- `batch_update_waypoints(flight_id: str, waypoints: List[Waypoint]) -> BatchUpdateResult` - Batch waypoint update
- `get_flight_metadata(flight_id: str) -> Optional[FlightMetadata]` - Retrieves flight metadata

### Validation
- `validate_waypoint(waypoint: Waypoint) -> ValidationResult` - Validates single waypoint
- `validate_geofence(geofence: Geofences) -> ValidationResult` - Validates geofence boundaries
- `validate_flight_continuity(waypoints: List[Waypoint]) -> ValidationResult` - Validates waypoint sequence continuity

## External Dependencies
- **F03 Flight Database** - Persistence layer for flights and waypoints
- **F04 Satellite Data Manager** - Triggered for prefetch_route_corridor on flight creation
- **F13 Coordinate Transformer** - Called for set_enu_origin on flight creation

## Internal Methods

### Flight Operations
- `_generate_flight_id()` - Generates unique flight identifier
- `_persist_flight(flight: Flight)` - Saves flight to F03
- `_load_flight(flight_id: str)` - Loads flight from F03
- `_delete_flight_resources(flight_id: str)` - Cleans up flight-related resources

### Validation Helpers
- `_validate_gps_bounds(lat: float, lon: float)` - Validates GPS coordinates within valid range
- `_validate_waypoint_sequence(waypoints: List[Waypoint])` - Checks waypoint ordering and gaps
- `_validate_geofence_polygon(geofence: Geofences)` - Validates geofence geometry

### Coordinate Setup
- `_setup_enu_origin(flight_id: str, start_gps: GPSPoint)` - Delegates to F13 for ENU origin setup

## Unit Tests
- Test flight creation with valid data returns flight_id
- Test flight creation with invalid geofence returns validation error
- Test flight creation triggers F04.prefetch_route_corridor
- Test flight creation calls F13.set_enu_origin
- Test get_flight returns None for non-existent flight
- Test delete_flight removes flight from database
- Test update_flight_status transitions state correctly
- Test validate_waypoint rejects out-of-bounds GPS
- Test validate_geofence rejects invalid polygon
- Test validate_flight_continuity detects excessive gaps
- Test batch_update_waypoints handles partial failures
- Test waypoint update validates before persisting

## Integration Tests
- Test flight creation end-to-end with F03 persistence
- Test flight creation triggers F04 satellite prefetching
- Test flight creation sets ENU origin via F13
- Test flight deletion cleans up all related data in F03
- Test concurrent flight creation handles ID generation correctly
- Test waypoint batch update maintains data consistency

