"""
Propagation models for RF coverage calculation.

Each model implements the PropagationModel interface and is stateless/thread-safe.
"""

from app.propagation.base import PropagationModel, PropagationInput, PropagationOutput
from app.propagation.free_space import FreeSpaceModel
from app.propagation.okumura_hata import OkumuraHataModel
from app.propagation.cost231_hata import Cost231HataModel
from app.propagation.cost231_wi import Cost231WIModel
from app.propagation.itu_r_p1546 import ITUR_P1546Model
from app.propagation.itu_r_p526 import KnifeEdgeDiffractionModel
from app.propagation.longley_rice import LongleyRiceModel

__all__ = [
    "PropagationModel", "PropagationInput", "PropagationOutput",
    "FreeSpaceModel", "OkumuraHataModel", "Cost231HataModel",
    "Cost231WIModel", "ITUR_P1546Model", "KnifeEdgeDiffractionModel",
    "LongleyRiceModel",
]