from __future__ import annotations

from pathlib import Path

from app.config import get_settings
from app.core.geo import PathPoint
from app.core.landcover import LandcoverNotConfiguredError, landcover_path
from app.core.vegetation import P833Coefficients, p833_attenuation


def vegetation_loss_along(
    points: list[PathPoint],
    freq_hz: float,
    include_vegetation: bool,
    landcover_path_dir: str | Path | None = None,
    canopy_path_dir: str | Path | None = None,
) -> float:
    if not include_vegetation:
        return 0.0

    settings = get_settings()
    landcover_dir = landcover_path_dir or settings.landcover_path
    canopy_dir = canopy_path_dir or settings.canopy_path

    try:
        path = landcover_path(points, landcover_dir, canopy_dir)
    except LandcoverNotConfiguredError:
        return 0.0

    coefficients = P833Coefficients(
        gamma_db_per_m=settings.p833_gamma_db_per_m,
        max_attenuation_db=settings.p833_max_attenuation_db,
    )
    return p833_attenuation(
        depth_m=path.vegetation_depth_m,
        freq_hz=freq_hz,
        forest_type="unknown",
        coefficients=coefficients,
    )