import cptable from "../lib/codepage.js";
import Utils from "../Utils.js";
import CryptoJS from "crypto-js";


/**
 * Character encoding operations.
 *
 * @author n1474335 [n1474335@gmail.com]
 * @copyright Crown Copyright 2016
 * @license Apache-2.0
 *
 * @namespace
 */
const CharEnc = {

    /**
     * @constant
     * @default
     */
    IO_FORMAT: {
        "UTF-8": 65001,
        "UTF-7": 65000,
        "UTF16LE": 1200,
        "UTF16BE": 1201,
        "UTF16": 1201,
        "IBM EBCDIC International": 500,
        "IBM EBCDIC US-Canada": 37,
        "Windows-874 Thai": 874,
        "Japanese Shift-JIS": 932,
        "Simplified Chinese GBK": 936,
        "Korean": 949,
        "Traditional Chinese Big5": 950,
        "Windows-1250 Central European": 1250,
        "Windows-1251 Cyrillic": 1251,
        "Windows-1252 Latin": 1252,
        "Windows-1253 Greek": 1253,
        "Windows-1254 Turkish": 1254,
        "Windows-1255 Hebrew": 1255,
        "Windows-1256 Arabic": 1256,
        "Windows-1257 Baltic": 1257,
        "Windows-1258 Vietnam": 1258,
        "US-ASCII": 20127,
        "Russian Cyrillic KOI8-R": 20866,
        "Simplified Chinese GB2312": 20936,
        "KOI8-U Ukrainian Cyrillic": 21866,
        "ISO-8859-1 Latin 1 (Western European)": 28591,
        "ISO-8859-2 Latin 2 (Central European)": 28592,
        "ISO-8859-3 Latin 3": 28593,
        "ISO-8859-4 Baltic": 28594,
        "ISO-8859-5 Cyrillic": 28595,
        "ISO-8859-6 Arabic": 28596,
        "ISO-8859-7 Greek": 28597,
        "ISO-8859-8 Hebrew": 28598,
        "ISO-8859-9 Turkish": 28599,
        "ISO-8859-10 Latin 6": 28600,
        "ISO-8859-11 Latin (Thai)": 28601,
        "ISO-8859-13 Latin 7 (Estonian)": 28603,
        "ISO-8859-14 Latin 8 (Celtic)": 28604,
        "ISO-8859-15 Latin 9": 28605,
        "ISO-8859-16 Latin 10": 28606,
        "ISO-2022 JIS Japanese": 50222,
        "EUC Japanese": 51932,
        "EUC Korean": 51949,
        "Simplified Chinese GB18030": 54936,
    },

    /**
     * Encode text operation.
     * @author tlwr [toby@toby.codes]
     *
     * @param {string} input
     * @param {Object[]} args
     * @returns {byteArray}
     */
    runEncode: function(input, args) {
        let format = CharEnc.IO_FORMAT[args[0]];
        let encoded = cptable.utils.encode(format, input);
        encoded = Array.from(encoded);
        return encoded;
    },

    /**
     * Decode text operation.
     * @author tlwr [toby@toby.codes]
     *
     * @param {byteArray} input
     * @param {Object[]} args
     * @returns {string}
     */
    runDecode: function(input, args) {
        let format = CharEnc.IO_FORMAT[args[0]];
        let decoded = cptable.utils.decode(format, input);
        return decoded;
    },
};

export default CharEnc;