"""Find a walk with enough time to enjoy the view."""

from dataclasses import dataclass


@dataclass
class Walk:
    name: str
    distance_km: float
    minutes: int


def within_reach(walks: list[Walk], free_minutes: int) -> list[Walk]:
    """Keep routes that fit, ordered by distance."""
    suitable = [walk for walk in walks if walk.minutes <= free_minutes]
    return sorted(suitable, key=lambda walk: walk.distance_km)


# Leave a little room in the afternoon.
routes = [
    Walk("Riverside loop", 3.2, 45),
    Walk("Old railway path", 5.8, 80),
    Walk("Hilltop lookout", 4.1, 65),
]

if __name__ == "__main__":
    for route in within_reach(routes, free_minutes=70):
        print(f"{route.name}: {route.distance_km:.1f} km")