/*
 * Vencord, a modification for Discord's desktop app
 * Copyright (c) 2022 Vendicated and contributors
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

import { moment } from "@webpack/common";

// Utils for readable text transformations eg: `toTitle(fromKebab())`

// Case style to words
export const wordsFromCamel = (text: string) => text.split(/(?=[A-Z])/).map(w => w.toLowerCase());
export const wordsFromSnake = (text: string) => text.toLowerCase().split("_");
export const wordsFromKebab = (text: string) => text.toLowerCase().split("-");
export const wordsFromPascal = (text: string) => text.split(/(?=[A-Z])/).map(w => w.toLowerCase());
export const wordsFromTitle = (text: string) => text.toLowerCase().split(" ");

// Words to case style
export const wordsToCamel = (words: string[]) =>
    words.map((w, i) => (i ? w[0].toUpperCase() + w.slice(1) : w)).join("");
export const wordsToSnake = (words: string[]) => words.join("_").toUpperCase();
export const wordsToKebab = (words: string[]) => words.join("-").toLowerCase();
export const wordsToPascal = (words: string[]) =>
    words.map(w => w[0].toUpperCase() + w.slice(1)).join("");
export const wordsToTitle = (words: string[]) =>
    words.map(w => w[0].toUpperCase() + w.slice(1)).join(" ");

/**
 * Forms milliseconds into a human readable string link "1 day, 2 hours, 3 minutes and 4 seconds"
 * @param ms Milliseconds
 * @param short Whether to use short units like "d" instead of "days"
 */
export function formatDuration(ms: number, short: boolean = false) {
    const dur = moment.duration(ms);
    return (["years", "months", "weeks", "days", "hours", "minutes", "seconds"] as const).reduce((res, unit) => {
        const x = dur[unit]();
        if (x > 0 || res.length) {
            if (res.length)
                res += unit === "seconds" ? " and " : ", ";

            const unitStr = short
                ? unit[0]
                : x === 1 ? unit.slice(0, -1) : unit;

            res += `${x} ${unitStr}`;
        }
        return res;
    }, "").replace(/((,|and) \b0 \w+)+$/, "") || "now";
}