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

	var fs = require('fs');
	var cssesc = require('../cssesc.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(
				'cssesc v%s - http://mths.be/cssesc',
				cssesc.version
			);
			log([
				'\nUsage:\n',
				'\tcssesc [string]',
				'\tcssesc [-i | --identifier] [string]',
				'\tcssesc [-s | --single-quotes] [string]',
				'\tcssesc [-d | --double-quotes] [string]',
				'\tcssesc [-w | --wrap] [string]',
				'\tcssesc [-e | --escape-everything] [string]',
				'\tcssesc [-v | --version]',
				'\tcssesc [-h | --help]',
				'\nExamples:\n',
				'\tcssesc \'f\xF6o \u2665 b\xE5r \uD834\uDF06 baz\'',
				'\tcssesc --identifier \'f\xF6o \u2665 b\xE5r \uD834\uDF06 baz\'',
				'\tcssesc --escape-everything \'f\xF6o \u2665 b\xE5r \uD834\uDF06 baz\'',
				'\tcssesc --double-quotes --wrap \'f\xF6o \u2665 b\xE5r \uD834\uDF06 baz\'',
				'\techo \'f\xF6o \u2665 b\xE5r \uD834\uDF06 baz\' | cssesc'
			].join('\n'));
			return process.exit(1);
		}

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

		strings.forEach(function(string) {
			// Process options
			if (/^(?:-i|--identifier)$/.test(string)) {
				options.isIdentifier = true;
				return;
			}
			if (/^(?:-s|--single-quotes)$/.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;
			}

			// Process string(s)
			var result;
			try {
				result = cssesc(string, options);
				log(result);
			} catch(error) {
				log(error.message + '\n');
				log('Error: failed to escape.');
				log('If you think this is a bug in cssesc, please report it:');
				log('https://github.com/mathiasbynens/cssesc/issues/new');
				log(
					'\nStack trace using cssesc@%s:\n',
					cssesc.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) {
			// The script was called from a non-TTY context. This is a rather uncommon
			// use case we don’t actively support. However, we don’t want the script
			// to wait forever in such cases, so…
			timeout = setTimeout(function() {
				// …if no piped data arrived after a whole minute, handle shell
				// arguments instead.
				main();
			}, 60000);
		}
		data = '';
		stdin.on('data', function(chunk) {
			clearTimeout(timeout);
			data += chunk;
		});
		stdin.on('end', function() {
			strings.push(data.trim());
			main();
		});
		stdin.resume();
	}

}());
