namespace :bullet_train do
  namespace :themes do
    namespace :tester do
      desc "Fork the \"Tester\" theme into your local repository."
      task :eject, [:destination] => :environment do |task, args|
        theme_base_path = `bundle show --paths bullet_train-themes-tester`.chomp
        puts "Ejecting from Tester theme in `#{theme_base_path}`."

        puts "Ejecting Tailwind configuration into `./tailwind.#{args[:destination]}.config.js`."
        `cp #{theme_base_path}/tailwind.tester.config.js #{Rails.root}/tailwind.#{args[:destination]}.config.js`

        puts "Ejecting Tailwind mailer configuration into `./tailwind.mailer.#{args[:destination]}.config.js`."
        `cp #{theme_base_path}/tailwind.mailer.tester.config.js #{Rails.root}/tailwind.mailer.#{args[:destination]}.config.js`
        `sed -i #{'""' if `echo $OSTYPE`.include?("darwin")} "s/tester/#{args[:destination]}/g" #{Rails.root}/tailwind.mailer.#{args[:destination]}.config.js`

        puts "Ejecting stylesheets into `./app/assets/stylesheets/#{args[:destination]}`."
        `mkdir #{Rails.root}/app/assets/stylesheets`
        `cp -R #{theme_base_path}/app/assets/stylesheets/tester #{Rails.root}/app/assets/stylesheets/#{args[:destination]}`
        `cp -R #{theme_base_path}/app/assets/stylesheets/tester.tailwind.css #{Rails.root}/app/assets/stylesheets/#{args[:destination]}.tailwind.css`
        `sed -i #{'""' if `echo $OSTYPE`.include?("darwin")} "s/tester/#{args[:destination]}/g" #{Rails.root}/app/assets/stylesheets/#{args[:destination]}.tailwind.css`

        puts "Ejecting JavaScript into `./app/javascript/application.#{args[:destination]}.js`."
        `cp #{theme_base_path}/app/javascript/application.tester.js #{Rails.root}/app/javascript/application.#{args[:destination]}.js`

        puts "Ejecting all theme partials into `./app/views/themes/#{args[:destination]}`."
        `mkdir #{Rails.root}/app/views/themes`
        `cp -R #{theme_base_path}/app/views/themes/tester #{Rails.root}/app/views/themes/#{args[:destination]}`
        `sed -i #{'""' if `echo $OSTYPE`.include?("darwin")} "s/tester/#{args[:destination]}/g" #{Rails.root}/app/views/themes/#{args[:destination]}/layouts/_head.html.erb`

        puts "Cutting local `Procfile.dev` over from `tester` to `#{args[:destination]}`."
        `sed -i #{'""' if `echo $OSTYPE`.include?("darwin")} "s/tester/#{args[:destination]}/g" #{Rails.root}/Procfile.dev`

        puts "Cutting local `package.json` over from `tester` to `#{args[:destination]}`."
        `sed -i #{'""' if `echo $OSTYPE`.include?("darwin")} "s/tester/#{args[:destination]}/g" #{Rails.root}/package.json`

        # Stub out the class that represents this theme and establishes its inheritance structure.
        target_path = "#{Rails.root}/app/lib/bullet_train/themes/#{args[:destination]}.rb"
        puts "Stubbing out a class that represents this theme in `.#{target_path}`."
        `mkdir -p #{Rails.root}/app/lib/bullet_train/themes`
        `cp #{theme_base_path}/lib/bullet_train/themes/tester.rb #{target_path}`
        `sed -i #{'""' if `echo $OSTYPE`.include?("darwin")} "s/module Tester/module #{args[:destination].titlecase}/g" #{target_path}`
        `sed -i #{'""' if `echo $OSTYPE`.include?("darwin")} "s/TailwindCss/Tester/g" #{target_path}`
        `sed -i #{'""' if `echo $OSTYPE`.include?("darwin")} "s/tester/#{args[:destination]}/g" #{target_path}`
        ["require", "TODO", "mattr_accessor"].each do |thing_to_remove|
          `grep -v #{thing_to_remove} #{target_path} > #{target_path}.tmp`
          `mv #{target_path}.tmp #{target_path}`
        end
        `standardrb --fix #{target_path}`

        puts "Cutting local project over from `tester` to `#{args[:destination]}` in `app/helpers/application_helper.rb`."
        `sed -i #{'""' if `echo $OSTYPE`.include?("darwin")} "s/:tester/:#{args[:destination]}/g" #{Rails.root}/app/helpers/application_helper.rb`

        puts "You must restart `bin/dev` at this point, because of the changes to `Procfile.dev` and `package.json`."
      end

      desc "Install this theme to your main application."
      task :install do |rake_task|
        # Grab the theme name from the rake task, bullet_train:theme:tester:install
        theme_name = rake_task.name.split(":")[2]

        # Grabs the current theme from
        # def current_theme
        #   :theme_name
        # end
        current_theme_regexp = /(^    :)(.*)/
        current_theme = nil

        new_lines = []
        [
          "./app/helpers/application_helper.rb",
          "./Procfile.dev",
          "./package.json"
        ].each do |file|
          File.open(file, "r") do |f|
            new_lines = f.readlines
            new_lines = new_lines.map do |line|
              # Make sure we get the current theme before trying to replace it in any of the files.
              # We grab it from the first file in the array above.
              current_theme = line.scan(current_theme_regexp).flatten.last if line.match?(current_theme_regexp)

              line.gsub!(/#{current_theme}/, theme_name) unless current_theme.nil?
              line
            end
          end

          File.open(file, "w") do |f|
            f.puts new_lines.join
          end
        end
      end
    end
  end
end