/* jshint browser:false, node:true, esnext: true */

var gulp = require('gulp');
var debug = require('gulp-debug'); // jshint ignore:line
var logger = require('gulp-logger');
var filter = require('gulp-filter');
var util = require('gulp-util');
var sourcemaps = require('gulp-sourcemaps');
var concat = require('gulp-concat');
var lazypipe = require('lazypipe');
var uglify = require('gulp-uglify');
var rename = require('gulp-rename');
var replace = require('gulp-replace');
var foreach = require('gulp-foreach');
var amdOptimize = require("amd-optimize");
var argv = require('yargs').argv;

// uglify
var compress = {
    unsafe       : true,
    hoist_vars   : true,
    warnings     : false,
    pure_getters : true
};

var mangle = {
    except: [ "define" ]
};

function renameModules(match) {
    return match.replace(/['"]([\w\.\/]+)?['"]/g, '"$1.min"');
}

var uglify = lazypipe()
    .pipe(logger, { after: 'uglify complete', extname: '.min.js', showChange: true })
    .pipe(uglify, { compress, mangle, preserveComments: "license" })
    .pipe(replace, /define\(.+?\]/g, renameModules)
    .pipe(rename, { suffix: ".min" });


// AMD gathering

function gatherCustomAmd(stream, file) {
    var moduleId = file.path.match(/kendo\.(.+)\.js/)[1];

    console.log(moduleId);
    return stream.pipe(amdOptimize(`kendo.${moduleId}`, {
        baseUrl: "js",
        exclude: [ 'jquery' ]
    }));
}

var gatherCustom = lazypipe()
    .pipe(foreach, gatherCustomAmd);

gulp.task("custom", function() {
    var files = argv.c;

    if (files.indexOf(",") == -1) {
        throw new util.PluginError({
            task: "custom",
            plugin: "custom",
            message: "please specify more than one component"
        });
    }
    if (!files) {
        throw new util.PluginError({
            task: "custom",
            plugin: "custom",
            message: "please provide a list of the components to be included in the build with -c, separated with ','"
        });
    }

    var included = [];
    return gulp.src(`js/kendo.{${files}}.js`, { base: "js" })
            .pipe(gatherCustom())
            .pipe(filter(function(file) {
                if (included.indexOf(file.path) === -1) {
                    included.push(file.path);
                    return true;
                }  else {
                    return false;
                }
            }))
            .pipe(concat({path: 'js/kendo.custom.js', base: 'js'}))
            .pipe(sourcemaps.init())
            .pipe(uglify())
            .pipe(logger({after: 'source map complete!', extname: '.map', showChange: true}))
            .pipe(sourcemaps.write("./"))
            .pipe(gulp.dest("dist/js"));
});