// FIXME: This should be an absolute URL!
const DB640_API_BASE_URL = '/betriebsstellen/';

class RailwayInfraLookupError extends Error {}

class RailwayInfra {
    constructor(payload) {
        this.id   = payload.ID;
        this.code = payload.Code;
        this.name = payload.Name;
    }

    static lookup(code) {
        // FIXME: Use URL(code, DB640_API_BASE_URL) here!
        let url = DB640_API_BASE_URL + encodeURI(code);
        let options = {
            method: 'GET',
            headers: { 'Accept': 'application/json' }
        };
        return fetch(url, options)
            .then(res => {
                if (res.ok)
                    return res.json();

                if (res.status == 404)
                    throw new RailwayInfraLookupError(res.statusText);
            })
            .then(payload => {
                return Promise.resolve(new RailwayInfra(payload));
            });
    }
}