import dataclasses
import json
from typing import List

from models.listing import DestinationMode, Route, RouteLegStep
from rec import routing


class RouteSerializer:
    @staticmethod
    def serialize(routing_info: dict[DestinationMode, list[Route]]) -> str:
        return json.dumps(
            {
                json.dumps(dataclasses.asdict(destination_mode)): [
                    json.dumps(dataclasses.asdict(route)) for route in routes
                ]
                for destination_mode, routes in routing_info.items()
            }
        )

    @staticmethod
    def deserialize(route_data_json: str) -> dict[DestinationMode, List[Route]]:
        json_data = json.loads(route_data_json)
        destination_routes = {}
        for destination_mode_str, routes_json in json_data.items():
            parsed_destination = json.loads(destination_mode_str)
            destination_mode = DestinationMode(
                destination_address=parsed_destination["destination_address"],
                travel_mode=routing.TravelMode(parsed_destination["travel_mode"]),
            )
            parsed_route = json.loads(routes_json[0])
            routes = [
                Route(
                    legs=[
                        RouteLegStep(
                            distance_meters=step["distance_meters"],
                            duration_s=step["duration_s"],
                            travel_mode=routing.TravelMode(step["travel_mode"]),
                        )
                        for step in parsed_route["legs"]
                    ],
                    distance_meters=parsed_route["distance_meters"],
                    duration_s=int(parsed_route["duration_s"]),
                )
            ]
            destination_routes[destination_mode] = routes
        return destination_routes