namespace :vue do
  desc 'Run vue-cli create and regenerate configuration'
  task :create do
    pm = VueCli::Rails::NodeEnv.new
    abort('Cannot find node.js') unless pm.node?

    get_input = ->(message, list = 'Yn') {
      list = list.chars
      default = list.find { |c| c.upcase == c }
      list = list.map { |c| c == default ? c : c.downcase }.uniq
      valid = "[#{list.join('')}]"
      list = list.map(&:downcase)
      print "#{message} #{valid}"
      loop do
        r = STDIN.gets.chop.downcase
        break default if r == ''
        break r if list.include?(r)
        print "  [INVALID!] Please retry: #{valid}:"
      end
    }

    # 1. package manager
    yarn = pm.yarn_version
    npm = pm.npm_version
    if yarn
      if npm
        input = get_input.call('Which package manager to use (Y=Yarn, N=npm)?')
        pm.use!(input == 'n' ? :npm : :yarn)
      else
        pm.use!(:yarn)
      end
    elsif npm
      pm.use!(:npm)
    else
      abort('Cannot find npm or yarn')
    end
    puts "Using package manager: #{pm.package_manager}"

    # install vue-cli
    unless pm.vue?
      puts "@vue/cli haven't been installed"
      pm.global_add('@vue/cli')
    end

    src_dir = Pathname.new(__FILE__).dirname.join('..', 'source')
    root = ::Rails.root
    FileUtils.chdir root

    # 2. vue create .
    input = 'y'
    pack = root.join('package.json')
    if pack.exist?
      puts 'Detected `package.json`!'
      input = get_input.call('  Do you want to rerun `vue create?`', 'yN')
    end
    pm.exec('vue create', '', "-n -m #{pm.package_manager} .") if input == 'y'

    # 3. dev-dependencies
    package = JSON.parse(pack.read)
    dev_deps = package['devDependencies']
    dd = %w[webpack-assets-manifest js-yaml].find_all do |dep|
      !dev_deps.key?(dep)
    end
    pm.add "-D #{dd.join(' ')}" if dd.any?

    # 4. remove `src` folder
    src = root.join('src')
    if src.exist? && src.directory?
      puts 'Detected `src` folder (should be generated by vue-cli)'
      input = get_input.call('  Do you want to delete src folder?')
      FileUtils.rm_rf src if input == 'y'
    end

    # 5. copy sample codes
    input = get_input.call('Do you want to copy demo code?', 'yN')
    FileUtils.cp_r(src_dir.join('app'), root) if input == 'y'

    # 6. config files
    FileUtils.cp(src_dir.join('vue.rails.js'), "#{root}/")
    input = 'y'
    if root.join('vue.config.js').exist?
      puts 'Detected `vue.config.js`!'
      input = get_input.call('  Do you want to overwrite vue.config.js?', 'yN')
    end
    FileUtils.cp(src_dir.join('vue.config.js'), "#{root}/") if input == 'y'

    # 7. generate config/vue.yml
    yml_dest = root.join('config', 'vue.yml')
    if yml_dest.exist?
      puts 'Detected `config/vue.yml`!'
      input = get_input.call('  Do you want to overwrite config/vue.yml?')
    end
    if input == 'y'
      yml = src_dir.join('vue.yml').read
      yml = yml.sub('#PACKAGE_MANAGER', pm.package_manager.to_s)
      yml_dest.write(yml)
    end
  end

  desc 'Add pug template support: formats=pug,sass,less,stylus'
  task :support, [:formats] do |_t, args|
    pkgs = []
    args.formats.split(/\W/).each do |fmt|
      pkgs += case fmt
              when 'pug'
                %w[pug-plain-loader pug]
              when 'sass', 'scss'
                %w[sass-loader node-sass]
              when 'less'
                %w[less-loader less]
              when 'stylus'
                %w[stylus-loader stylus]
              else
                []
              end
    end
    throw(StandardError, '') if pkgs.empty?

    pm = VueCli::Rails::Configuration.instance.node_env
    pm.add "-D #{pkgs.join(' ')}"
  end

  desc 'Dump config/vue.yml to_json'
  task :json_config => :environment do
    config = VueCli::Rails::Configuration.new
    puts config.to_json
  end

  desc 'Bundle assets for production'
  task :compile => :environment do
    pm = VueCli::Rails::Configuration.instance.node_env
    pm.exec('vue-cli-service build', env: { 'RAILS_ENV' => 'production' })
  end
end