var
    gulp = require('gulp'),
    fs = require('fs'),
    Client = require('ssh2').Client,
    nodewatch = require('node-watch'),
    ignore = require('ignore'),
    ignoreFiles = [
        '.git',
        'gulpfile.js',
        'package.json',
        '.gitignore',
        'node_modules',
        '.vscode'
    ],
    ig = ignore().add(ignoreFiles);


gulp.task('watch', function () {

    return nodewatch([__dirname], { recursive: true }, function(evt, name) {

        if(!ig.ignores(name)) {
            console.log('%s changed.', name, evt);

            var conn = new Client();

            conn.on('ready', function() {

                console.log("Connected!");

                if(evt == 'update') {

                    var isFile = fs.statSync(name).isFile();

                    if(!isFile) {

                        conn.exec('mkdir ' + '/var/vmail/Web/merita' + name.replace(__dirname, '').replace(/[\\"]/g, '/').replace(/(\s+)/g, '\\$1'), function(err, stream) {

                            if (err) throw err;

                            stream.on('data', function(data, stderr) {
                                if (stderr)
                                    console.log('STDERR: ' + data);
                                else
                                    console.log('STDOUT: ' + data);

                            }).on('exit', function(code, signal) {

                                console.log('Exited with code ' + code);

                            });

                        });

                    } else {

                        conn.sftp(function (err, sftp) {

                            if ( err ) {
                                sftp.end();

                                throw err;

                                // process.exit( 2 );
                            }

                            console.log( "- SFTP started" );

                            if(evt == 'update') {
                                var stats = fs.statSync(name).isFile();

                                if(stats) {
                                    var readStream = fs.createReadStream( name );
                                    var writeStream = sftp.createWriteStream( "/var/vmail/Web/merita" + name.replace(__dirname, '').replace(/[\\"]/g, '/') );
                                }

                            }

                            if(writeStream) {

                                writeStream.on('close',function () {
                                    console.log( "- file transferred" );
                                    sftp.end();
                                    //process.exit( 0 );
                                });

                                readStream.pipe( writeStream );
                            }

                        });

                    }

                } else if(evt == 'remove') {

                    conn.exec('rm -r -f ' + '/var/vmail/Web/merita' + name.replace(__dirname, '').replace(/[\\"]/g, '/').replace(/(\s+)/g, '\\$1'), function(err, stream) {

                        if (err) throw err;

                        stream.on('data', function(data, stderr) {
                            if (stderr)
                                console.log('STDERR: ' + data);
                            else
                                console.log('STDOUT: ' + data);

                        }).on('exit', function(code, signal) {

                            console.log('Exited with code ' + code, signal);

                        });

                    });

                }

            }).on('error', function(err){
                console.log( "%s", err );
            })
            .on('keyboard-interactive', function (name, descr, lang, prompts, finish) {

                var password = "PASSWORD_FTP";

                return finish([password]);

            }).connect({
                host: 'HOST_DO_FTP',
                port: 22,
                username: 'USERNAME',
                tryKeyboard: true
            });
        }

    });

});