require "sfn"
require "fileutils"

module Sfn
  class Command
    # Init command
    class Init < Command
      include Sfn::CommandModule::Base

      INIT_DIRECTORIES = [
        "sparkleformation/dynamics",
        "sparkleformation/components",
        "sparkleformation/registry",
      ]

      # Run the init command to initialize new project
      def execute!
        unless name_args.size == 1
          raise ArgumentError.new "Please provide path argument only for project initialization"
        else
          path = name_args.first
        end
        if File.file?(path)
          raise "Cannot create project directory. Given path is a file. (`#{path}`)"
        end
        if File.directory?(path)
          ui.warn "Project directory already exists at given path. (`#{path}`)"
          ui.confirm "Overwrite existing files?"
        end
        run_action "Creating base project directories" do
          INIT_DIRECTORIES.each do |new_dir|
            FileUtils.mkdir_p(File.join(path, new_dir))
          end
          nil
        end
        run_action "Creating project bundle" do
          File.open(File.join(path, "Gemfile"), "w") do |file|
            file.puts "source 'https://rubygems.org'\n\ngem 'sfn'"
          end
          nil
        end
        ui.info "Generating .sfn configuration file"
        Dir.chdir(path) do
          Conf.new({:generate => true}, []).execute!
        end
        ui.info "Installing project bundle"
        Dir.chdir(path) do
          if defined?(Bundler)
            Bundler.clean_system("bundle install")
          else
            system("bundle install")
          end
        end
        ui.info "Project initialization complete!"
        ui.puts "  Project path -> #{File.expand_path(path)}"
      end
    end
  end
end