#!/usr/bin/env node

var path = require('path');
var outpipe = require('outpipe');
var through = require('through2');

var fromArgs = require('./args.js');
var w = fromArgs(process.argv.slice(2));

var outfile = w.argv.o || w.argv.outfile;
var verbose = w.argv.v || w.argv.verbose;

if (w.argv.version) {
    console.error('watchify v' + require('../package.json').version +
        ' (in ' + path.resolve(__dirname, '..') + ')'
    );
    console.error('browserify v' + require('browserify/package.json').version +
        ' (in ' + path.dirname(require.resolve('browserify')) + ')'
    );
    return;
}

if (!outfile) {
    console.error('You MUST specify an outfile with -o.');
    process.exit(1);
}

var bytes, time;
w.on('bytes', function (b) { bytes = b });
w.on('time', function (t) { time = t });

w.on('update', bundle);
bundle();

function bundle () {
    var didError = false;
    var writer = through();
    var wb = w.bundle();
    
    w.pipeline.get('pack').once('readable', function() {
        if (!didError) {
            wb.pipe(writer);
        }
    });
    
    wb.on('error', function (err) {
        console.error(String(err));
        if (!didError) {
            didError = true;
            writer.end('console.error(' + JSON.stringify(String(err)) + ');');
        }
    });
    
    writer.once('readable', function() {
        var outStream = outpipe(outfile);
        outStream.on('error', function (err) {
            console.error(err);
        });
        outStream.on('exit', function () {
            if (verbose && !didError) {
                console.error(bytes + ' bytes written to ' + outfile
                    + ' (' + (time / 1000).toFixed(2) + ' seconds)'
                );
            }
        });
        writer.pipe(outStream);
    });
}