var through = require("through2");
var rename  = require("gulp-rename");
var chalk   = require("chalk");
var newer   = require("gulp-newer");
var babel   = require("gulp-babel");
var watch   = require("gulp-watch");
var gutil   = require("gulp-util");
var gulp    = require("gulp");
var path    = require("path");

var scripts = "./packages/*/src/**/*.js";
var dest = "packages";

gulp.task("default", ["build"]);

gulp.task("build", function () {
  return gulp.src(scripts)
    .pipe(rename(function (file) {
      file.dirname = file.dirname.replace(/^([^\\]+)\/src/, "$1/lib");
    }))
    .pipe(newer(dest))
    .pipe(through.obj(function (file, enc, callback) {
      gutil.log("Compiling", "'" + chalk.cyan(file.path) + "'...");
      callback(null, file);
    }))
    .pipe(babel())
    .on("error", function (err) {
      console.error(err.stack);
    })
    .pipe(gulp.dest(dest));
});

gulp.task("watch", ["build"], function (callback) {
  watch(scripts, function () {
    gulp.start("build");
  });
});