#!/usr/bin/env node (function() {

var fs = require('fs');
var stringEscape = require('../jsesc.js');
var strings = process.argv.splice(2);
var stdin = process.stdin;
var data;
var timeout;
var isObject = false;
var options = {};
var log = console.log;

var main = function() {
        var option = strings[0];

        if (/^(?:-h|--help|undefined)$/.test(option)) {
                log(
                        'jsesc v%s - http://mths.be/jsesc',
                        stringEscape.version
                );
                log([
                        '\nUsage:\n',
                        '\tjsesc [string]',
                        '\tjsesc [-s | --single-quotes] [string]',
                        '\tjsesc [-d | --double-quotes] [string]',
                        '\tjsesc [-w | --wrap] [string]',
                        '\tjsesc [-e | --escape-everything] [string]',
                        '\tjsesc [-6 | --es6] [string]',
                        '\tjsesc [-j | --json] [string]',
                        '\tjsesc [-o | --object] [stringified_object]', // `JSON.parse()` the argument
                        '\tjsesc [-p | --pretty] [string]', // `compact: false`
                        '\tjsesc [-v | --version]',
                        '\tjsesc [-h | --help]',
                        '\nExamples:\n',
                        '\tjsesc \'f\xF6o \u2665 b\xE5r \uD834\uDF06 baz\'',
                        '\tjsesc --json \'f\xF6o \u2665 b\xE5r \uD834\uDF06 baz\'',
                        '\tjsesc --json --escape-everything \'f\xF6o \u2665 b\xE5r \uD834\uDF06 baz\'',
                        '\tjsesc --double-quotes --wrap \'f\xF6o \u2665 b\xE5r \uD834\uDF06 baz\'',
                        '\techo \'f\xF6o \u2665 b\xE5r \uD834\uDF06 baz\' | jsesc'
                ].join('\n'));
                return process.exit(1);
        }

        if (/^(?:-v|--version)$/.test(option)) {
                log('v%s', stringEscape.version);
                return process.exit(1);
        }

        strings.forEach(function(string) {
                // Process options
                if (/^(?:-s|--single-quotes)$/.test(string)) {
                        options.quotes = 'single';
                        return;
                }
                if (/^(?:-d|--double-quotes)$/.test(string)) {
                        options.quotes = 'double';
                        return;
                }
                if (/^(?:-w|--wrap)$/.test(string)) {
                        options.wrap = true;
                        return;
                }
                if (/^(?:-6|--es6)$/.test(string)) {
                        options.es6 = true;
                        return;
                }
                if (/^(?:-e|--escape-everything)$/.test(string)) {
                        options.escapeEverything = true;
                        return;
                }
                if (/^(?:-j|--json)$/.test(string)) {
                        options.json = true;
                        return;
                }
                if (/^(?:-o|--object)$/.test(string)) {
                        isObject = true;
                        return;
                }
                if (/^(?:-p|--pretty)$/.test(string)) {
                        isObject = true;
                        options.compact = false;
                        return;
                }

                // Process string(s)
                var result;
                try {
                        if (isObject) {
                                string = JSON.parse(string);
                        }
                        result = stringEscape(string, options);
                        log(result);
                } catch(error) {
                        log(error.message + '\n');
                        log('Error: failed to escape.');
                        log('If you think this is a bug in jsesc, please report it:');
                        log('https://github.com/mathiasbynens/jsesc/issues/new');
                        log(
                                '\nStack trace using jsesc@%s:\n',
                                stringEscape.version
                        );
                        log(error.stack);
                        return process.exit(1);
                }
        });
        // Return with exit status 0 outside of the `forEach` loop, in case
        // multiple strings were passed in.
        return process.exit(0);

};

if (stdin.isTTY) {
        // handle shell arguments
        main();
} else {
        // Either the script is called from within a non-TTY context,
        // or `stdin` content is being piped in.
        if (!process.stdout.isTTY) { // called from a non-TTY context
                timeout = setTimeout(function() {
                        // if no piped data arrived after a while, handle shell arguments
                        main();
                }, 250);
        }

        data = '';
        stdin.on('data', function(chunk) {
                clearTimeout(timeout);
                data += chunk;
        });
        stdin.on('end', function() {
                strings.push(data.trim());
                main();
        });
        stdin.resume();
}

}());