from datetime import datetime, timedelta
from fastapi import BackgroundTasks
from background_jobs.weather import download_weather_for_plan_marker
from database import models
from utils.gps import get_distance


async def refresh_markers_weather_info(
    planned_takeoff_datetime: datetime, planned_speed: float,
    markers: list[models.FlightPlanMarker], background_tasks: BackgroundTasks
):
    if not planned_takeoff_datetime:
        return

    marker_date_time = planned_takeoff_datetime
    previous_marker = markers[0] if markers else None
    for marker in markers:
        if marker_date_time:
            # TODO: tohle by se melo volat i v pripade zmeny planovaneho casu vzletu i planovane rychlosti
            distance_from_prev = get_distance(
                a=(previous_marker.gps_latitude, previous_marker.gps_longitude),
                b=(marker.gps_latitude, marker.gps_longitude)
            )
            time_from_prev_sec = distance_from_prev / planned_speed * 3600  # pracuji v km/h
            marker_date_time = marker_date_time + timedelta(seconds=time_from_prev_sec)

            background_tasks.add_task(
                download_weather_for_plan_marker,
                marker_id=marker.id, date_time=marker_date_time
            )
        previous_marker = marker