FalkenDev / SparkRentals-Mobile-App

import { API_KEY } from '@env';

import config from '../config/config.json';

import storage from './storage';

const mapModel = {

    /**

     * Get all cities from API

     * @param API_KEY 

     * @returns Promise<Object>

     */

    getCities: async function getCities(API_KEY: string): Promise<Object> {       

        const token = await storage.readToken();        

        const response = await fetch(`${config.base_url}cities?api_key=${API_KEY}`, {

            method: 'GET',

            headers: {

                'x-access-token': token['token']

            }

        });

        const result = await response.json();

        return result;

    },

    /**

     * Get closest city based on users location

     * @param API_KEY 

     * @param userData 

     * @returns Promise<object>

     */

    getClosestCity: async function getClosestCity(userData: object): Promise<Object> {

        const cities = await mapModel.getCities(API_KEY);

        const city2User = [];

        for (const city of Object.entries(cities['cities'])) {

            // console.log(city[1]['zones'][0]);

            // console.log(city[1]['name']);

            const cityCoordinates = mapModel.cityCoordinates(city[1]['name']);

            const distance2User = mapModel.calcDistance(cityCoordinates['latitude'], cityCoordinates['longitude'], userData['latitude'], userData['longitude']);

            city2User.push([city[1], distance2User]);

        };

        const sortedCity2User = city2User.sort((a, b) => {

            return a[1] - b[1];

        });

        // console.log(userData);

        // console.log(sortedCity2User[0][0]);

        // console.log(cities['cities'][0]);

        // return cities['cities'][1];

        return sortedCity2User[0][0];

    },

    /**

     * Get zones for a given city

     * @param city 

     * @returns string

     */

    getZones: function getZones(city: object): string[] {

        // All zones in current city

        const zones = city['zones'];

        // Zone colors based on zoneType

        const zoneColors = {

            parkingZone: '#96FF7166',

            noParkingZone: '#FF606066',

            bonusParkingZone: '#C64EFF66',

            chargingZone: '#638FFF66'

        };

        // Array to be returned containing all zones and data

        const zoneMarkers = [];

        // Loop through all zones and append them to return object

        for (let i = 0; i < zones.length; i++) {

            const coordinates = city['zones'][i]['coordinates'];

            // console.log(city['zones'][i]['zoneType']);

            const zone = {

                _id: city['zones'][i]['_id'],

                zoneType: city['zones'][i]['zoneType'],

                zoneColor: zoneColors[city['zones'][i]['zoneType']],

                coordinates: []

            };

            for (const LatLng of coordinates) {

                zone['coordinates'].push({latitude: LatLng[1], longitude: LatLng[0]})

            };

            zoneMarkers.push(zone);

        }        

        return zoneMarkers;

    },

    calcDistance: function calcDistance(lat1, lon1, lat2, lon2) {

        function deg2rad(deg) {

            return deg * (Math.PI/180)

        }

        var R = 6371; // Radius of the earth in km

        var dLat = deg2rad(lat2-lat1);  // deg2rad below

        var dLon = deg2rad(lon2-lon1); 

        var a = 

        Math.sin(dLat/2) * Math.sin(dLat/2) +

        Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) * 

        Math.sin(dLon/2) * Math.sin(dLon/2)

        ; 

        var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); 

        var d = R * c; // Distance in km

        return d;

    },

    cityCoordinates: function cityCoordinates(cityName) {

        const cities = {

            'Stockholm': {latitude: 59.325025453165885, longitude: 18.067812149589304},

            'Halmstad': {latitude: 56.674283063446495, longitude: 12.857826360096537},

            'Karlskrona': {latitude: 56.16116530651073, longitude: 15.586898701061049}

        };

        return cities[cityName]

    }

};

export default mapModel;