/*
 * Copyright 2025 mingliqiye
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * ProjectName mingli-utils
 * ModuleName mingli-utils.main
 * CurrentFile Base256.kt
 * LastUpdate 2025-09-20 14:01:29
 * UpdateUser MingLiPro
 */

package com.mingliqiye.utils.base

/**
 * Base256 字符集 256个
 *
 * 256个字符 要字符集的下面复制
 *
 * !#$%&()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[]^_`abcdefghijklmnopqrstuvwxyz{|}~§±×÷←↑→↓⇒⇔∀∃∅∆∇∈∉∋∌∏∑−∓∕∗∘∙√∛∜∞∟∠∣∥∧∨∩∪∫∬∭∮∯∰∱∲∳∴∵∶∷≈≠≡≤≥≦≧≪≫≺≻⊂⊃⊆⊇⊈⊉⊊⊋⊕⊖⊗⊘⊙⊚⊛⊜⊝⊞⊟⊠⊡⊢⊣⊤⊥⊦⊧⊨⊩⊪⊫⊬⊭⊮⊯⋀⋁⋂⋃⋄⋅⋆⋇⋈⋉⋊⋋⋌⋍⋎⋏⋐⋑⋒⋓⋔⋕⋖⋗⋘⋙⋚⋛⋜⋝⋞⋟⋠⋡⋢⋣⋤⋥⋦⋧⋨⋩▁▂▃▄▅▆▇█▉▊▋▌▍▎▏▐░▒▓▔▕▖▗▘▙
 *
 */
class Base256 : BaseCodec {

    companion object {
        val code = arrayOf(
            '!',
            '#',
            '$',
            '%',
            '&',
            '(',
            ')',
            '*',
            '+',
            ',',
            '-',
            '.',
            '/',
            '0',
            '1',
            '2',
            '3',
            '4',
            '5',
            '6',
            '7',
            '8',
            '9',
            ':',
            ';',
            '<',
            '=',
            '>',
            '?',
            '@',
            'A',
            'B',
            'C',
            'D',
            'E',
            'F',
            'G',
            'H',
            'I',
            'J',
            'K',
            'L',
            'M',
            'N',
            'O',
            'P',
            'Q',
            'R',
            'S',
            'T',
            'U',
            'V',
            'W',
            'X',
            'Y',
            'Z',
            '[',
            ']',
            '^',
            '_',
            '`',
            'a',
            'b',
            'c',
            'd',
            'e',
            'f',
            'g',
            'h',
            'i',
            'j',
            'k',
            'l',
            'm',
            'n',
            'o',
            'p',
            'q',
            'r',
            's',
            't',
            'u',
            'v',
            'w',
            'x',
            'y',
            'z',
            '{',
            '|',
            '}',
            '~',
            '§',
            '±',
            '×',
            '÷',
            '←',
            '↑',
            '→',
            '↓',
            '⇒',
            '⇔',
            '∀',
            '∃',
            '∅',
            '∆',
            '∇',
            '∈',
            '∉',
            '∋',
            '∌',
            '∏',
            '∑',
            '−',
            '∓',
            '∕',
            '∗',
            '∘',
            '∙',
            '√',
            '∛',
            '∜',
            '∞',
            '∟',
            '∠',
            '∣',
            '∥',
            '∧',
            '∨',
            '∩',
            '∪',
            '∫',
            '∬',
            '∭',
            '∮',
            '∯',
            '∰',
            '∱',
            '∲',
            '∳',
            '∴',
            '∵',
            '∶',
            '∷',
            '≈',
            '≠',
            '≡',
            '≤',
            '≥',
            '≦',
            '≧',
            '≪',
            '≫',
            '≺',
            '≻',
            '⊂',
            '⊃',
            '⊆',
            '⊇',
            '⊈',
            '⊉',
            '⊊',
            '⊋',
            '⊕',
            '⊖',
            '⊗',
            '⊘',
            '⊙',
            '⊚',
            '⊛',
            '⊜',
            '⊝',
            '⊞',
            '⊟',
            '⊠',
            '⊡',
            '⊢',
            '⊣',
            '⊤',
            '⊥',
            '⊦',
            '⊧',
            '⊨',
            '⊩',
            '⊪',
            '⊫',
            '⊬',
            '⊭',
            '⊮',
            '⊯',
            '⋀',
            '⋁',
            '⋂',
            '⋃',
            '⋄',
            '⋅',
            '⋆',
            '⋇',
            '⋈',
            '⋉',
            '⋊',
            '⋋',
            '⋌',
            '⋍',
            '⋎',
            '⋏',
            '⋐',
            '⋑',
            '⋒',
            '⋓',
            '⋔',
            '⋕',
            '⋖',
            '⋗',
            '⋘',
            '⋙',
            '⋚',
            '⋛',
            '⋜',
            '⋝',
            '⋞',
            '⋟',
            '⋠',
            '⋡',
            '⋢',
            '⋣',
            '⋤',
            '⋥',
            '⋦',
            '⋧',
            '⋨',
            '⋩',
            '▁',
            '▂',
            '▃',
            '▄',
            '▅',
            '▆',
            '▇',
            '█',
            '▉',
            '▊',
            '▋',
            '▌',
            '▍',
            '▎',
            '▏',
            '▐',
            '░',
            '▒',
            '▓',
            '▔',
            '▕',
            '▖',
            '▗',
            '▘',
            '▙'
        )
        val codeMap = code.mapIndexed { index, c -> c to index }.toMap()
    }

    override fun encode(bytes: ByteArray): String {
        val result = CharArray(bytes.size)
        for (i in bytes.indices) {
            val unsignedByte = bytes[i].toInt() and 0xFF
            result[i] = code[unsignedByte]
        }
        return String(result)
    }

    override fun decode(string: String): ByteArray {
        val result = ByteArray(string.length)
        for (i in string.indices) {
            result[i] = codeMap[string[i]]!!.toByte()
        }
        return result
    }
}