#!/usr/bin/env node

import fs from 'node:fs';
import { readFileSync } from 'node:fs';
import * as helper from './cli-helper.js';
import xml2json from '../lib/xml2json.js';
import json2xml from '../lib/json2xml.js';

const project = JSON.parse(readFileSync(new URL('../package.json', import.meta.url), 'utf8'));

let output = '';
let stream = '';
const requiredArgs = [
    { arg: 'src', type: 'file', option: 'src', desc: 'Input file that need to be converted.' }
];
const optionalArgs = [
    { arg: 'help', alias: 'h', type: 'flag', option: 'help', desc: 'Display this help content.' },
    { arg: 'version', alias: 'v', type: 'flag', option: 'version', desc: 'Display version number of this module.' },
    { arg: 'out', type: 'file', option: 'out', desc: 'Output file where the converted result should be written.' },
    { arg: 'to-json', type: 'flag', option: 'toJason', desc: 'Convert.' },
    { arg: 'compact', type: 'flag', option: 'compact', desc: 'Compact JSON form (see explanation in www.npmjs.com/package/xml-js).' },
    { arg: 'spaces', type: 'number', option: 'spaces', desc: 'Specifies amount of space indentation in the output.' },
    { arg: 'trim', type: 'flag', option: 'trim', desc: 'Any whitespaces surrounding texts will be trimmed.' },
    // { arg: 'sanitize', type: 'flag', option:'sanitize', desc: 'Special xml characters will be replaced with entity codes.' },
    { arg: 'native-type', type: 'flag', option: 'nativeType', desc: 'Numbers and boolean will be converted (coerced) to native type instead of text.' },
    { arg: 'always-array', type: 'flag', option: 'alwaysArray', desc: 'Every element will always be an array type (applicable if --compact is set). If the passed value is an array, only elements with names in the passed array are always made arrays.' },
    { arg: 'always-children', type: 'flag', option: 'alwaysChildren', desc: 'Every element will always contain sub-elements (applicable if --compact is not set).' },
    { arg: 'instruction-attr', type: 'flag', option: 'instructionHasAttributes', desc: 'Whether to parse contents of processing instruction as attributes.' },
    { arg: 'full-tag', type: 'flag', option: 'fullTagEmptyElement', desc: 'XML elements will always be in <a></a> form.' },
    { arg: 'no-decl', type: 'flag', option: 'ignoreDeclaration', desc: 'Declaration instruction <?xml?> will be ignored.' },
    { arg: 'no-decl', type: 'flag', option: 'ignoreInstruction', desc: 'Processing instruction <?...?> will be ignored.' },
    { arg: 'no-attr', type: 'flag', option: 'ignoreAttributes', desc: 'Attributes of elements will be ignored.' },
    { arg: 'no-text', type: 'flag', option: 'ignoreText', desc: 'Texts of elements will be ignored.' },
    { arg: 'no-cdata', type: 'flag', option: 'ignoreCdata', desc: 'CData of elements will be ignored.' },
    { arg: 'no-doctype', type: 'flag', option: 'ignoreDoctype', desc: 'DOCTYPE of elements will be ignored.' },
    { arg: 'no-comment', type: 'flag', option: 'ignoreComment', desc: 'Comments of elements will be ignored.' },
    { arg: 'text-key', type: 'string', option: 'textKey', desc: 'To change the default \'text\' key.' },
    { arg: 'cdata-key', type: 'string', option: 'cdataKey', desc: 'To change the default \'cdata\' key.' },
    { arg: 'doctype-key', type: 'string', option: 'doctypeKey', desc: 'To change the default \'doctype\' key.' },
    { arg: 'comment-key', type: 'string', option: 'commentKey', desc: 'To change the default \'comment\' key.' },
    { arg: 'attributes-key', type: 'string', option: 'attributesKey', desc: 'To change the default \'attributes\' key.' },
    { arg: 'declaration-key', type: 'string', option: 'declarationKey', desc: 'To change the default \'declaration\' key <?xml?>.' },
    { arg: 'instruction-key', type: 'string', option: 'instructionKey', desc: 'To change the default \'processing instruction\' key <?...?>.' },
    { arg: 'type-key', type: 'string', option: 'typeKey', desc: 'To change the default \'type\' key (applicable if --compact is not set).' },
    { arg: 'name-key', type: 'string', option: 'nameKey', desc: 'To change the default \'name\' key (applicable if --compact is not set).' },
    { arg: 'elements-key', type: 'string', option: 'elementsKey', desc: 'To change the default \'elements\' key (applicable if --compact is not set).' }
];

process.stdin.setEncoding('utf8');
process.stdin.on('readable', function () {
    const chunk = process.stdin.read();
    if (chunk !== null) {
        stream += chunk;
    }
});
process.stdin.on('end', function () {
    process.stdout.write(xml2json(stream, {}) + '\n');
});

const options = helper.mapCommandLineArgs(requiredArgs, optionalArgs);

if (options.version) {
    console.log(project.version);
    process.exit(0);
} else if (options.help || process.argv.length <= 2 + requiredArgs.length - 1) {
    console.log(helper.getCommandLineHelp('xml-js', requiredArgs, optionalArgs));
    process.exit(process.argv.length <= 2 ? 1 : 0);
} else if ('src' in options) {
    if (fs.statSync(options.src).isFile()) {
        if (options.src.split('.').pop() === 'xml') {
            output = xml2json(fs.readFileSync(options.src, 'utf8'), options);
        } else if (options.src.split('.').pop() === 'json') {
            output = json2xml(fs.readFileSync(options.src, 'utf8'), options);
        }
        if (options.out) {
            fs.writeFileSync(options.out, output, 'utf8');
        } else {
            console.log(output);
        }
        process.exit(0);
    }
} else {
    process.exit(1);
}