#! /usr/bin/env runjs

var argsEx = require('component-args.js');

var System = java.lang.System;
var FastJSON = Packages.com.alibaba.fastjson.JSON;
var RStream = Packages.me.hatter.tools.commons.io.RStream;

var main = () => {
    var args = argsEx.parseDefARGs(['h', 'help', 'n']);
    if (args.flg('h', 'help')) {
        println('viewjson.js [FLAGS] [FILENAME]');
        println(' -h, --help         Print help');
        println(' -n                 Do not print new line at last')
        return;
    }
    var json = null;
    if (args.length < 1) {
        json = RStream.from(System.in).string();
    } else {
        var j = $$.file(args[0]);
        if (!(j.exists())) {
            xprintln('[ERROR] File not exists: ' + j);
            return;
        }
        json = $$.rFile(j).string();
    }

    try {
        var formatedJSON = FastJSON.toJSONString($$.parseJSON(json), true).replaceAll('\t', '    ');
        if (args.flg('n')) { print(formatedJSON) } else { println(formatedJSON); }
    } catch (e) {
        xprintln('[ERROR] Parse JSON failed.');
    }
};

main();