var gulp = require('gulp');
var exec = require('child_process').exec;
var path = require('path');
var harmonic = require('./harmonic.json');

var browserSync = require('browser-sync');
var reload = browserSync.reload;

var config = {
	outDir: 'public'
};

var themeDir = function(uri) {
	return path.join(__dirname, 'node_modules', harmonic.theme, uri);
};

gulp.task('clean', require('del').bind(null, [config.outDir]));

gulp.task('reload', ['build'], function() {
	reload();
});

gulp.task('serve', ['build'], function () {
  browserSync({
    notify: false,
    port: 9000,
    server: {
      baseDir: [config.outDir]
    }
  });

  // watch for changes
  gulp.watch([
    'harmonic.json',
    'src/**/*.md',
    'resources/*',
    themeDir('**/*.{html,css,js}')
  ], ['reload']);
});

gulp.task('build', ['clean'], function(cb) {
	exec('harmonic build', function(err) {
	    if (err) {
	    	console.error(err);
	    	return cb(err); // return error
	    }

	    cb(); // finished task
	  });
});

gulp.task('default', function() {
	gulp.start('build');
});