// (C) 2007-2019 GoodData Corporation
// in our URI could be string chars after /obj/
const mdUriRegexp = /\[(\/gdc\/md\/[^\/]+\/obj\/[^\/]+)\]/g;
const elementUriRegexp = /\[(\/gdc\/md\/[^\/]+\/obj\/[^\/]+)\/elements\?id=\d+\]/g;

export function reduceMAQLItems(bucketItems: string[]): string[] {
    const itemsHash = bucketItems.reduce((uriItems: { [uri: string]: number }, bucketItem: string) => {
        if (bucketItem.startsWith("/gdc/md/")) {
            uriItems[bucketItem] = 1;
        } else {
            [mdUriRegexp, elementUriRegexp].forEach(regexp => {
                let match = regexp.exec(bucketItem);
                while (match) {
                    uriItems[match[1]] = 1;
                    match = regexp.exec(bucketItem);
                }
            });
        }
        return uriItems;
    }, {});

    return Object.keys(itemsHash);
}