from app.config import get_settings
from app.core.geo import GeoPoint, sample_path
from app.core.landcover import LandcoverNotConfiguredError, landcover_path
from app.models.landcover import LandcoverPathRequest, LandcoverPathResponse, LandcoverSegment


def path_landcover(request: LandcoverPathRequest) -> LandcoverPathResponse:
    settings = get_settings()
    points = sample_path(
        GeoPoint(lat=request.start.lat, lon=request.start.lon),
        GeoPoint(lat=request.end.lat, lon=request.end.lon),
        request.samples,
    )
    try:
        result = landcover_path(
            points,
            landcover_path_dir=settings.landcover_path,
            canopy_path_dir=settings.canopy_path,
        )
    except LandcoverNotConfiguredError as exc:
        raise NotImplementedError(str(exc)) from exc

    return LandcoverPathResponse(
        segments=[
            LandcoverSegment(
                from_m=segment.from_m,
                to_m=segment.to_m,
                class_name=segment.class_name,
                forest_type=segment.forest_type,
                canopy_height_m=segment.canopy_height_m,
            )
            for segment in result.segments
        ],
        vegetation_depth_m=result.vegetation_depth_m,
    )