import { Meteor } from 'meteor/meteor';
import { OHIF } from 'meteor/ohif:core';

const studySearchPromises = new Map();

/**
 * Search for studies information by the given filter
 *
 * @param {Object} filter Filter that will be used on search
 * @returns {Promise} resolved with an array of studies information or rejected with an error
 */
OHIF.studies.searchStudies = filter => {
    const promiseKey = JSON.stringify(filter);
    if (studySearchPromises.has(promiseKey)) {
        return studySearchPromises.get(promiseKey);
    } else {
        const promise = new Promise((resolve, reject) => {
            const server = OHIF.servers.getCurrentServer();

            if (server.type === 'dicomWeb' && server.requestOptions.requestFromBrowser === true) {
                OHIF.studies.services.QIDO.Studies(server, filter).then(resolve, reject);
            } else {
                Meteor.call('StudyListSearch', filter, (error, studiesData) => {
                    if (error) {
                        reject(error);
                    } else {
                        resolve(studiesData);
                    }
                });
            }
        });
        studySearchPromises.set(promiseKey, promise);
        return promise;
    }
};