nomadmania-app/src/utils/mapHelpers.ts

import * as turf from '@turf/turf';
import { Feature } from '@turf/turf';

interface RegionData {
  type?: string;
  name?: string;
  crs?: {
    type: string;
    properties: { name: string; };
  };
  features?: any;
}

export const findRegionInDataset = (dataset: RegionData, point: turf.helpers.Position | turf.helpers.Point | turf.helpers.Feature<turf.helpers.Point, turf.helpers.Properties>): Feature | undefined => {
  return dataset.features.find((region: any) => {
    const coordinates = region?.geometry?.coordinates;
    const type = region?.geometry?.type;

    if (!Array.isArray(coordinates) || coordinates.length === 0) {
      return false;
    }

    try {
      const polygon: any = type === 'Polygon'
        ? turf.polygon(coordinates)
        : turf.multiPolygon(coordinates);

      return turf.booleanPointInPolygon(point, polygon);
    } catch (error) {
      console.error('Error creating polygon:', error);
      return false;
    }
  });
};

export const calculateMapRegion = (bounds: turf.BBox): any => {
  const padding = 1;
  return {
    latitude: (bounds[1] + bounds[3]) / 2,
    longitude: (bounds[0] + bounds[2]) / 2,
    latitudeDelta: Math.abs(bounds[3] - bounds[1]) + padding,
    longitudeDelta: Math.abs(bounds[2] - bounds[0]) + padding,
  };
};