declare var module: any;
declare function require(name:string);
declare var __filename: string;
declare var __dirname: string;

var gulp = require('gulp');
var path = require('path');
var _ = require('lodash');
var $ = require('gulp-load-plugins')({ lazy: true });
var gutil = $.util;
var errorHandler = require('../helpers/errorHandler');

class StylusCompileStream {
  constructor(stream) {
    if(!stream) {
      throw new Error('Compile Stylus setup incorrectly');
    }

    return stream
      .pipe($.sourcemaps.init())
      .pipe($["if"](/[.](styl)$/,
        $.stylus()
        .on('error', errorHandler.onWarning('stylus'))
      ))
      .pipe($["if"](/[.](less)$/,
        $.less()
        .on('error', errorHandler.onWarning('stylus'))
      ))
      .pipe($.sourcemaps.write())
      .on('error', errorHandler.onError('stylus'));
  }
}

export = StylusCompileStream;