'use strict';
var gulp = require('gulp');

var $ = require('gulp-load-plugins')();
var del = require('del');
var runSequence = require('run-sequence').use(gulp);
var browserSync = require('browser-sync').create();
var reload = browserSync.reload;

var vendorSources = [
    'node_modules/jquery/dist/jquery.min.js',
    'node_modules/bootstrap-sass/assets/javascripts/bootstrap/collapse.js',
    'node_modules/bootstrap-sass/assets/javascripts/bootstrap/dropdown.js',
    'node_modules/bootstrap-sass/assets/javascripts/bootstrap/tooltip.js',
    'node_modules/bootstrap-datepicker/dist/js/bootstrap-datepicker.js',
    'node_modules/bootstrap-datepicker/js/locales/bootstrap-datepicker.nb.js',
    'node_modules/highcharts/js/highcharts.min.js',
    'node_modules/underscore/underscore-min.js'
];

gulp.task('styles', function () {
    return gulp.src('app/styles/*.scss')
        .pipe($.sass({
            sourceComments: 'map'
        }).on('error', $.sass.logError))
        .pipe($.autoprefixer('last 1 version'))
        .pipe(gulp.dest('dist/styles'))
});

gulp.task('scripts', function () {
    var myAppScripts = ['app/js/**/*.js'];
    var myFilter = $.filter(myAppScripts, {restore: true});
    return gulp.src(vendorSources.concat(myAppScripts))
        .pipe(myFilter)
        .pipe($.jshint())
        .pipe($.jshint.reporter(require('jshint-stylish')))
        .pipe(myFilter.restore)
        .pipe($.concat('app.min.js'))
        .pipe(gulp.dest('dist/js'))
});

gulp.task('diststyles', function () {
    return gulp.src('app/styles/*.scss')
        .pipe($.sass()
            .on('error', $.sass.logError))
        .pipe($.autoprefixer('last 1 version'))
        .pipe($.csso())
        .pipe(gulp.dest('dist/styles'))
});

gulp.task('distscripts', function () {
    return gulp.src(vendorSources.concat(['app/js/**/*.js']))
        .pipe($.concat('app.min.js'))
        .pipe($.uglify())
        .pipe(gulp.dest('dist/js'))
});

gulp.task('images', function () {
    return gulp.src('app/images/**/*')
        .pipe($.imagemin({
            optimizationLevel: 3,
            progressive: true,
            interlaced: true
        }))
        .pipe(gulp.dest('dist/images'))
});

gulp.task('fonts', function () {
    return gulp.src(['node_modules/bootstrap-sass/assets/fonts/**/*'])
        .pipe($.filter('**/*.{eot,svg,ttf,woff,woff2}'))
        .pipe($.flatten())
        .pipe(gulp.dest('dist/fonts'))
});

gulp.task('clean', function (cb) {
    return del('dist', cb);
});

gulp.task(
    'build',
    ['distscripts', 'diststyles', 'images', 'fonts'],
    function() {
        return gulp.src('dist/**/*').pipe($.size({title: 'build', gzip: true}));
    }
);
gulp.task('default', ['clean'], function (cb) {
    runSequence('build', 'generate-service-worker', cb);
});

gulp.task('serve', ['styles'], function () {
});

gulp.task('watch', ['serve'], function () {
    browserSync.init({
        proxy: '127.0.0.1:8000'
    });

    // watch for changes
    gulp.watch([
        '../templates/**/*.html',
        'app/js/**/*.js',
        'app/images/**/*'
    ]).on('change', reload);

    gulp.watch('app/styles/**/*.scss', ['styles']);
    gulp.watch('app/js/**/*.js', ['scripts']);
    gulp.watch('app/images/**/*', ['images']);
});

gulp.task('generate-service-worker', function(callback) {
    var path = require('path');
    var swPrecache = require('sw-precache');
    var rootDir = 'dist';
    var srvRootDir = '/static/'+rootDir;

    gulp.src(['node_modules/sw-toolbox/sw-toolbox.js', 'app/sw/sw-toolbox-config.js'])
        .pipe(gulp.dest('dist/sw'));

    swPrecache.write(path.join(rootDir, 'service-worker.js'), {
        staticFileGlobs: [rootDir + '/**/*.{js,html,css,png,jpg,gif}'],
        stripPrefix: rootDir,
        replacePrefix: srvRootDir,
        importScripts: [srvRootDir + '/sw/sw-toolbox.js', srvRootDir + '/sw/sw-toolbox-config.js']
    }, callback);
});