'use strict'

const gulp = require('gulp')
const watch = require('gulp-watch')
const merge = require('merge-stream')
const babel = require('gulp-babel')
const uglify = require('gulp-uglify')
const concat = require('gulp-concat')
const nodemon = require('gulp-nodemon')
const plumber = require('gulp-plumber')
const zip = require('gulp-zip')
const tar = require('gulp-tar')
const gzip = require('gulp-gzip')
const sass = require('gulp-sass')
const cleanCSS = require('gulp-clean-css')
const include = require('gulp-include')
const run = require('run-sequence')

/**
 * Paths
 *
 * @type       {Object}
 */
const paths = {
  scripts: {
    combine: [
      './node_modules/socket.io-client/dist/socket.io.min.js',
      './node_modules/jquery/dist/jquery.min.js',
      './node_modules/vue/dist/vue.min.js',
      './node_modules/jquery-smooth-scroll/jquery.smooth-scroll.min.js',
      './node_modules/jquery-simple-upload/simpleUpload.min.js',
      './node_modules/jquery-contextmenu/dist/jquery.contextMenu.min.js',
      './node_modules/sticky-js/dist/sticky.min.js',
      './node_modules/simplemde/dist/simplemde.min.js',
      './node_modules/ace-builds/src-min-noconflict/ace.js',
      './node_modules/ace-builds/src-min-noconflict/ext-modelist.js',
      './node_modules/ace-builds/src-min-noconflict/mode-markdown.js',
      './node_modules/ace-builds/src-min-noconflict/theme-tomorrow_night.js',
      './node_modules/filesize.js/dist/filesize.min.js',
      './node_modules/lodash/lodash.min.js'
    ],
    ace: [
      './node_modules/ace-builds/src-min-noconflict/mode-*.js',
      '!./node_modules/ace-builds/src-min-noconflict/mode-markdown.js'
    ],
    compile: [
      './client/js/*.js'
    ],
    watch: [
      './client/js/**/*.js'
    ]
  },
  css: {
    combine: [
      './node_modules/highlight.js/styles/tomorrow.css',
      './node_modules/simplemde/dist/simplemde.min.css'
    ],
    compile: [
      './client/scss/*.scss'
    ],
    includes: [
      './node_modules/requarks-core' //! MUST BE LAST
    ],
    watch: [
      './client/scss/**/*.scss',
      '../core/core-client/scss/**/*.scss'
    ]
  },
  fonts: [
    '../node_modules/requarks-core/core-client/fonts/**/*' //! MUST BE LAST
  ],
  deploy: [
    './**/*',
    '!node_modules', '!node_modules/**',
    '!coverage', '!coverage/**',
    '!client/js', '!client/js/**',
    '!client/scss', '!client/scss/**',
    '!dist', '!dist/**',
    '!tests', '!tests/**',
    '!data', '!data/**',
    '!repo', '!repo/**',
    '!.babelrc', '!.gitattributes', '!.gitignore', '!.snyk', '!.travis.yml',
    '!gulpfile.js', '!inch.json', '!config.yml', '!wiki.sublime-project'
  ]
}

/**
 * TASK - Starts server in development mode
 */
gulp.task('server', ['scripts', 'css', 'fonts'], function () {
  nodemon({
    script: './server',
    ignore: ['assets/', 'client/', 'data/', 'repo/', 'tests/'],
    ext: 'js json',
    env: { 'NODE_ENV': 'development' }
  })
})

/**
 * TASK - Process all scripts processes
 */
gulp.task('scripts', ['scripts-libs', 'scripts-app'])

/**
 * TASK - Combine js libraries
 */
gulp.task('scripts-libs', function () {
  return merge(

    gulp.src(paths.scripts.combine)
    .pipe(concat('libs.js', {newLine: ';\n'}))
    .pipe(uglify({ mangle: false }))
    .pipe(gulp.dest('./assets/js')),

    gulp.src(paths.scripts.ace)
    .pipe(gulp.dest('./assets/js/ace'))

  )
})

/**
 * TASK - Combine, make compatible and compress js app scripts
 */
gulp.task('scripts-app', function () {
  return gulp.src(paths.scripts.compile)
  .pipe(plumber())
  .pipe(include({ extensions: 'js' }))
  .pipe(babel())
  .pipe(uglify())
  .pipe(plumber.stop())
  .pipe(gulp.dest('./assets/js'))
})

/**
 * TASK - Process all css processes
 */
gulp.task('css', ['css-libs', 'css-app'])

/**
 * TASK - Combine css libraries
 */
gulp.task('css-libs', function () {
  return gulp.src(paths.css.combine)
  .pipe(plumber())
  .pipe(concat('libs.css'))
  .pipe(cleanCSS({ keepSpecialComments: 0 }))
  .pipe(plumber.stop())
  .pipe(gulp.dest('./assets/css'))
})

/**
 * TASK - Combine app css
 */
gulp.task('css-app', function () {
  return gulp.src(paths.css.compile)
  .pipe(plumber())
  .pipe(sass.sync({ includePaths: paths.css.includes }))
  .pipe(cleanCSS({ keepSpecialComments: 0 }))
  .pipe(plumber.stop())
  .pipe(gulp.dest('./assets/css'))
})

/**
 * TASK - Copy web fonts
 */
gulp.task('fonts', function () {
  return gulp.src(paths.fonts)
  .pipe(gulp.dest('./assets/fonts'))
})

/**
 * TASK - Start dev watchers
 */
gulp.task('watch', function () {
  return merge(
    watch(paths.scripts.watch, {base: './'}, function () { return gulp.start('scripts-app') }),
    watch(paths.css.watch, {base: './'}, function () { return gulp.start('css-app') })
  )
})

/**
 * TASK - Starts development server with watchers
 */
gulp.task('default', ['watch', 'server'])

gulp.task('dev', function () {
  paths.css.includes.pop()
  paths.css.includes.push('../core')

  paths.fonts.pop()
  paths.fonts.push('../core/core-client/fonts/**/*')

  return run('default')
})

/**
 * TASK - Creates deployment packages
 */
gulp.task('deploy', ['scripts', 'css', 'fonts'], function () {
  var zipStream = gulp.src(paths.deploy)
    .pipe(zip('wiki-js.zip'))
    .pipe(gulp.dest('dist'))

  var targzStream = gulp.src(paths.deploy)
    .pipe(tar('wiki-js.tar'))
    .pipe(gzip())
    .pipe(gulp.dest('dist'))

  return merge(zipStream, targzStream)
})