from datetime import timedelta

import gpxpy
from gpxpy.gpx import GPXTrackPoint


def get_closest_point(gpx, timestamp, max_diff) -> GPXTrackPoint | None:
    closest_point = None
    closest_diff = timedelta.max

    for track in gpx.tracks:
        for segment in track.segments:
            for point in segment.points:
                diff = abs(point.time - timestamp)
                if diff < closest_diff and diff.total_seconds() <= max_diff:
                    closest_diff = diff
                    closest_point = point

    return closest_point


def get_gpx_data(file):
    gpx_file = open(file, 'r')
    gpx = gpxpy.parse(gpx_file)

    data = []
    for track in gpx.tracks:
        for segment in track.segments:
            for point in segment.points:
                data.append((point.time, point.latitude, point.longitude))

    return data