// Copyright 2024, Command Line Inc.
// SPDX-License-Identifier: Apache-2.0s

import base64 from "base64-js";
import clsx from "clsx";

function isBlank(str: string): boolean {
    return str == null || str == "";
}

function base64ToString(b64: string): string {
    if (b64 == null) {
        return null;
    }
    if (b64 == "") {
        return "";
    }
    const stringBytes = base64.toByteArray(b64);
    return new TextDecoder().decode(stringBytes);
}

function stringToBase64(input: string): string {
    const stringBytes = new TextEncoder().encode(input);
    return base64.fromByteArray(stringBytes);
}

function base64ToArray(b64: string): Uint8Array {
    const rawStr = atob(b64);
    const rtnArr = new Uint8Array(new ArrayBuffer(rawStr.length));
    for (let i = 0; i < rawStr.length; i++) {
        rtnArr[i] = rawStr.charCodeAt(i);
    }
    return rtnArr;
}

// works for json-like objects (arrays, objects, strings, numbers, booleans)
function jsonDeepEqual(v1: any, v2: any): boolean {
    if (v1 === v2) {
        return true;
    }
    if (typeof v1 !== typeof v2) {
        return false;
    }
    if ((v1 == null && v2 != null) || (v1 != null && v2 == null)) {
        return false;
    }
    if (typeof v1 === "object") {
        if (Array.isArray(v1) && Array.isArray(v2)) {
            if (v1.length !== v2.length) {
                return false;
            }
            for (let i = 0; i < v1.length; i++) {
                if (!jsonDeepEqual(v1[i], v2[i])) {
                    return false;
                }
            }
            return true;
        } else {
            const keys1 = Object.keys(v1);
            const keys2 = Object.keys(v2);
            if (keys1.length !== keys2.length) {
                return false;
            }
            for (let key of keys1) {
                if (!jsonDeepEqual(v1[key], v2[key])) {
                    return false;
                }
            }
            return true;
        }
    }
    return false;
}

function makeIconClass(icon: string, fw: boolean): string {
    if (icon == null) {
        return null;
    }
    if (icon.match(/^(solid@)?[a-z0-9-]+$/)) {
        // strip off "solid@" prefix if it exists
        icon = icon.replace(/^solid@/, "");
        return clsx(`fa fa-sharp fa-solid fa-${icon}`, fw ? "fa-fw" : null);
    }
    if (icon.match(/^regular@[a-z0-9-]+$/)) {
        // strip off the "regular@" prefix if it exists
        icon = icon.replace(/^regular@/, "");
        return clsx(`fa fa-sharp fa-regular fa-${icon}`, fw ? "fa-fw" : null);
    }
    return null;
}

export { base64ToArray, base64ToString, isBlank, jsonDeepEqual, makeIconClass, stringToBase64 };