import { getBrowserWindow } from 'cbioportal-frontend-commons';

export const NAVCASEIDS_PARAM = 'navCaseIds';

export const NAVCASEIDS_REGEXP = new RegExp(`${NAVCASEIDS_PARAM}=([^&]*)`);

const PROP_NAME = 'navCaseIdsCache';

export function parseCohortIds(concatenatedIds: string) {
    return concatenatedIds.split(',').map((entityId: string) => {
        return entityId.includes(':')
            ? entityId
            : this.studyId + ':' + entityId;
    });
}

export function handleLongUrls() {
    const navCaseIdMatch = getBrowserWindow().location.hash.match(
        new RegExp(NAVCASEIDS_REGEXP)
    );
    // google analytics starts to crash when location.href gets too long
    // this is a fairly arbitrary length at which point we need to store these caseIds in localStorage instead of in hash
    if (navCaseIdMatch) {
        // now delete from url so that we don't hurt google analytics
        if (navCaseIdMatch[1].length > 60000) {
            getBrowserWindow().location.hash = getBrowserWindow().location.hash.replace(
                NAVCASEIDS_REGEXP,
                ''
            );
        }
        getBrowserWindow()[PROP_NAME] = navCaseIdMatch[1];
    }
}

export function getNavCaseIdsCache() {
    const data = getBrowserWindow()[PROP_NAME];
    delete getBrowserWindow()[PROP_NAME];
    return data ? parseCohortIds(data) : undefined;
}