#!/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 - https://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 [-t | --escape-etago] [string]',
                '\tjsesc [-6 | --es6] [string]',
                '\tjsesc [-l | --lowercase-hex] [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)$/.test(string)) {
                options.wrap = true;
                return;
            }
            if (/^(?:-e|--escape-everything)$/.test(string)) {
                options.escapeEverything = true;
                return;
            }
            if (/^(?:-t|--escape-etago)$/.test(string)) {
                options.escapeEtago = true;
                return;
            }
            if (/^(?:-6|--es6)$/.test(string)) {
                options.es6 = true;
                return;
            }
            if (/^(?:-l|--lowercase-hex)$/.test(string)) {
                options.lowercaseHex = true;
                return;
            }
            if (/^(?:-j|--json)$/.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();
    }

}());