export default class Utilities {
    /**
     *
     * @param time (s)
     * @returns
     */
    public static delay(time: number): Promise<any> {
        return new Promise((resolve) => setTimeout(resolve, time * 1000));
    }

    /**
     *@param predicate
     * @param time (s)
     * @returns
     */
    public static async waitUntil(predicate: () => boolean, timeCheck = 0.01) {
        while (!predicate()) {
            await this.delay(timeCheck);
        }
    }

    public static getJson(json: string): any {
        try {
            return JSON.parse(json);
        } catch (error) {
            return false;
        }
    }

    public static weightedRandom<T>(items: T[], weights: number[]): [T, number] {
        let i = 0;
        const weightsClone = [...weights];
        for (i = 1; i < weightsClone.length; i++) {
            weightsClone[i] += weights[i - 1];
        }

        let random = Math.random() * weightsClone[weightsClone.length - 1];

        for (i = 0; i < weightsClone.length; i++) {
            if (weightsClone[i] > random) break;
        }
        return [items[i], i];
    }
}