module BinInstall
  module Zsh
    module OhMyZsh
      def self.require!
        abort('Oh My Zsh is required. Visit http://ohmyz.sh/ to install.'.red) unless installed?
      end

      def self.install
        puts 'Installing Oh My Zsh...'.white
        print_reload_warning
        if continue?
          system(%(sh -c "$(curl -fsSL https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"))
        else
          abort('Oh My Zsh installation aborted by user.'.red)
        end
      end

      def self.install!
        puts 'Installing Oh My Zsh...'.white
        print_reload_warning
        if continue?
          BinInstall.system!(%(sh -c "$(curl -fsSL https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"))
        else
          abort('Oh My Zsh installation aborted by user.'.red)
        end
      end

      def self.print_reload_warning
        return if installed?
        puts 'Warning Oh My Zsh requires reloading the shell.'.yellow
        puts 'After Oh My Zsh finishes installing.'.red
        puts 'Close this window and restart your shell session.'.red
        puts "\n"
        puts 'Rerun the installer with:'
        puts '$ bin/install'.cyan
      end

      def self.continue?
        return true if installed?
        print 'Would you like to continue? [Y/n]: '
        Shell.default_yes?(gets.chomp)
      end

      def self.installed?
        File.exist?(File.expand_path('~/.oh-my-zsh'))
      end
    end
  end
end