#!/usr/bin/env ruby

require 'thor'
require 'cucumber-chef'

class CucumberChef < Thor
  include Thor::Actions

  no_tasks do

    def initalize_config
      source_dir = File.expand_path(File.join(File.dirname(__FILE__), "..", "lib", "cucumber", "chef", "templates", "cucumber-chef"))
      destination_dir = File.expand_path(File.join(Cucumber::Chef.locate_parent(".chef"), ".cucumber-chef"))
      FileUtils.mkdir_p(destination_dir)

      CucumberChef.source_root(source_dir)

      get_aws_credentials

      templates = {
        "config-rb.erb" => "config.rb"
      }

      templates.each do |source, destination|
        template(source, File.join(destination_dir, destination))
      end
      puts
      say "Ucanhaz Cucumber-Chef now! Rock on.", :green
    end

    def create_project(project)
      @project = project
      source_dir = File.expand_path(File.join(File.dirname(__FILE__), "..", "lib", "cucumber", "chef", "templates", "cucumber"))
      destination_dir = Cucumber::Chef.locate_parent(".chef")

      CucumberChef.source_root source_dir
      templates = {
        "readme.erb" => "features/#{project}/README",
        "example_feature.erb" => "features/#{project}/#{project}.feature",
        "example_steps.erb" => "features/#{project}/step_definitions/#{project}_steps.rb",
        "env.rb" => "features/support/env.rb",
        "readme-data_bags.erb" => "features/support/data_bags/README",
        "readme-roles.erb" => "features/support/roles/README",
        "readme-keys.erb" => "features/support/keys/README"
      }

      templates.each do |source, destination|
        template(source, File.join(destination_dir, destination))
      end
    end

    def load_config

      chef_repo = (Cucumber::Chef.locate_parent(".chef") rescue nil)
      if ( !chef_repo || ( !File.exists?(chef_repo) || !File.directory?(chef_repo) ) )
        fatal("It does not look like you are inside a chef-repo!  Please relocate to one and execute your command again!")
        exit(255)
      end

      $logger = Cucumber::Chef::Logger.new
      Cucumber::Chef.is_rc? and ($logger.level = Cucumber::Chef::Logger::DEBUG)

      message = "cucumber-chef v#{Cucumber::Chef::VERSION}"
      puts(set_color(message, :green, true))

      $logger.info { "================================================================================" }
      $logger.info { message }
      $logger.info { "UNAME: %s" % %x( uname -a ).chomp.strip }
      $logger.info { "Ruby Version: #{RUBY_VERSION}" }
      $logger.info { "Ruby Patch Level: #{RUBY_PATCHLEVEL}" }
      $logger.info { "Ruby Platform: #{RUBY_PLATFORM}" }
      $logger.info { "Ruby Engine: #{RUBY_ENGINE}" }
      $logger.info { "================================================================================" }

      @options.test? ? Cucumber::Chef::Config.test : Cucumber::Chef::Config.load
    end

    def fatal(message)
      puts(set_color(message, :red, :bold))
      exit(255)
    end

    def get_aws_credentials
      say "OHAI!", :magenta
      puts
      say "Cucumber-Chef uses Amazon Web Services to build a test lab for automated infrastructure testing."
      say "I need a few details before I can set up your test lab for you."
      puts
      say "We're going to use symmetric keys to authenticate with the AWS API."
      say "First, I need your access key."
      say "Your access key identifies you as you make API calls.  It's not a secret."
      say "You can find it under 'Access Credentials', on https://aws-portal.amazon.com/gp/aws/securityCredentials"
      puts
      @aws_access_key = ask "What is your AWS Access Key?", :bold
      puts
      say "Now I need your secret access key.  This *is* a secret.  The clue's in the name."
      say "This is just a string of characters used to create the digital signature included in your API requests."
      say "You can also find this under 'Access Credentials', on https://aws-portal.amazon.com/gp/aws/securityCredentials"
      puts
      @aws_secret_access_key = ask "What is your AWS Secret Access Key?", :bold
      puts
      say "Right. Now I need to know about the ssh key pair you want to use to connect to EC2 machines."
      say "I need the name of the key pair. You can see this on the AWS management console, under Network & Security > Key Pairs"
      puts
      @aws_ssh_id = ask "What is your AWS Key Pair called?", :bold
      puts
      say "I also need to know what the ssh key is called - the actual name of the file on your local machine, eg #{@aws_ssh_id}.pem"
      puts
      @aws_ssh_key = ask "What's the filename of your ssh key?", :bold
      puts
      say "And, finally, I need to know where you keep it, on the file system. Often this is ~/.ssh"
      puts
      @aws_ssh_key_dir = ask "What directory contains your ssh key?", :bold
      puts
      say "OK, nearly there. AWS uses different keys depending on which region you use."
      say "For example, 'us-east', 'us-west', or 'eu-west'"
      puts
      @region = ask "Which region are you using?", :bold
      puts
      say("One last thing.  If you're using librarian-chef, we want to be sure all the hooks are in place.")
      puts
      @librarian_chef = yes?("Does this chef-repo use librarian-chef?", :bold)
      puts
      say "Awesome.  Thank you!"
      puts
    end

  end

################################################################################

  desc "init", "Initalize cucumber-chef configuration"
  def init
    initalize_config
  end

################################################################################

  desc "setup", "Setup cucumber-chef test lab in Amazon EC2"
  method_option :test, :type => :boolean, :desc => "INTERNAL USE ONLY"
  def setup
    load_config

    puts
    if (test_lab = Cucumber::Chef::TestLab.new)
      if (server = test_lab.create)
        if (provisioner = Cucumber::Chef::Provisioner.new(server))

          provisioner.build

          puts
          puts("Your cucumber-chef test lab has now been provisioned!")
          puts
          puts("Be sure to log into the chef-server webui and change the default credentials.")
          puts
          puts("  Chef-Server WebUI:")
          puts("    http://#{server.public_ip_address}:4040/")
          puts("  Username:")
          puts("    admin")
          puts("  Password:")
          puts("    #{Cucumber::Chef::Provisioner::PASSWORD}")

        else
          puts(set_color("Could not create the provisioner!", :red, true))
        end
      else
        puts(set_color("Could not create the server!", :red, true))
      end
    else
      puts(set_color("Could not create a new instance of test lab!", :red, true))
    end
    puts

  rescue Cucumber::Chef::Error => e
    $logger.fatal { e.backtrace.join("\n") }
    fatal(e.message)
  end

################################################################################

  desc "teardown", "Teardown cucumber-chef test lab in Amazon EC2"
  method_option :test, :type => :boolean, :desc => "INTERNAL USE ONLY"
  def teardown
    load_config

    puts
    if (test_lab = Cucumber::Chef::TestLab.new)
      if yes?(set_color("Are you sure you want to teardown your cucumber-chef test lab?", :red, true))
        count_down_colors = { 5 => :green, 4 => :yellow, 3 => :yellow, 2 => :red, 1 => :red }
        puts
        puts(set_color("You have 5 seconds to abort!", :green, true))
        puts
        print(set_color("Self-destructing in", :green, true))
        5.downto(1) do |x|
          print(set_color("...#{x}", count_down_colors[x], true))
          sleep(1)
        end
        puts(set_color("...BOOM!", :red, true))
        puts
        test_lab.destroy
      else
        puts
        puts(set_color("Whew! That was close!", :green, true))
      end
    else
      puts(set_color("Could not find a cucumber-chef test lab to teardown!", :red, true))
    end
    puts

  rescue Cucumber::Chef::Error => e
    $logger.fatal { e.backtrace.join("\n") }
    fatal(e)
  end

################################################################################

  desc "up", "Startup the cucumber-chef test lab"
  def up
    load_config

    puts
    if (test_lab = Cucumber::Chef::TestLab.new)
      test_lab.start
    else
      puts(set_color("Could not find a cucumber-chef test lab to startup!", :red, true))
    end
    puts

  rescue Cucumber::Chef::Error => e
    $logger.fatal { e.backtrace.join("\n") }
    fatal(e)
  end

################################################################################

  desc "down", "Shutdown the cucumber-chef test lab"
  def down
    load_config

    puts
    if (test_lab = Cucumber::Chef::TestLab.new)
      test_lab.stop
    else
      puts(set_color("Could not find a cucumber-chef test lab to shutdown!", :red, true))
    end
    puts

  rescue Cucumber::Chef::Error => e
    $logger.fatal { e.backtrace.join("\n") }
    fatal(e)
  end

################################################################################

  desc "ssh [container]", "SSH to cucumber-chef test lab or [container] if specified."
  method_option :test, :type => :boolean, :desc => "INTERNAL USE ONLY"
  def ssh(*args)
    load_config

    puts
    if (test_lab = Cucumber::Chef::TestLab.new) && (test_lab.labs_running.count > 0)
      ssh = Cucumber::Chef::SSH.new

      if args.size == 0
        ssh.config[:host] = test_lab.labs_running.first.public_ip_address
        ssh.config[:ssh_user] = "ubuntu"
        ssh.config[:identity_file] = Cucumber::Chef.locate(:file, ".cucumber-chef", "id_rsa-#{ssh.config[:ssh_user]}")

        puts([set_color("Attempting SSH connection to cucumber-chef '", :blue, true), set_color("test lab", :cyan, true), set_color("'...", :blue, true)].join)
        ssh.console
      else
        container = args[0]

        ssh.config[:proxy] = true
        ssh.config[:proxy_host] = test_lab.labs_running.first.public_ip_address
        ssh.config[:proxy_ssh_user] = "ubuntu"
        ssh.config[:proxy_identity_file] = Cucumber::Chef.locate(:file, ".cucumber-chef", "id_rsa-#{ssh.config[:proxy_ssh_user]}")

        ssh.config[:host] = container
        ssh.config[:ssh_user] = "root"
        ssh.config[:identity_file] = Cucumber::Chef.locate(:file, ".cucumber-chef", "id_rsa-#{ssh.config[:proxy_ssh_user]}")

        puts([set_color("Attempting SSH connection to cucumber-chef container '", :blue, true), set_color(container, :cyan, true), set_color("'...", :blue, true)].join)
        ssh.console
      end

    else
      puts(set_color("No cucumber-chef test labs available to ssh to!", :red, true))
    end
    puts

  rescue Cucumber::Chef::Error => e
    $logger.fatal { e.backtrace.join("\n") }
    fatal(e)
  end

################################################################################

  desc "diagnose <container>", "Provide diagnostics from the chef-client on the specified container."
  method_option :strace, :type => :boolean, :desc => "output the chef-client 'chef-stacktrace.out'", :aliases => "-s", :default => true
  method_option :log, :type => :boolean, :desc => "output the chef-client 'chef.log'", :aliases => "-l", :default => true
  method_option :lines, :type => :numeric, :desc => "output the last N lines of the chef-client 'chef.log'", :aliases => "-n", :default => 1
  def diagnose(container)
    load_config

    puts
    if (test_lab = Cucumber::Chef::TestLab.new) && (test_lab.labs_running.count > 0)
      ssh = Cucumber::Chef::SSH.new

      ssh.config[:proxy] = true
      ssh.config[:proxy_host] = test_lab.labs_running.first.public_ip_address
      ssh.config[:proxy_ssh_user] = "ubuntu"
      ssh.config[:proxy_identity_file] = Cucumber::Chef.locate(:file, ".cucumber-chef", "id_rsa-#{ssh.config[:proxy_ssh_user]}")

      ssh.config[:host] = container
      ssh.config[:ssh_user] = "root"
      ssh.config[:identity_file] = Cucumber::Chef.locate(:file, ".cucumber-chef", "id_rsa-#{ssh.config[:proxy_ssh_user]}")

      puts([set_color("Attempting to collect diagnostic information on cucumber-chef container '", :blue, true), set_color(container, :cyan, true), set_color("'...", :blue, true)].join)
      if @options.strace?
        puts
        puts("chef-stacktrace.out:")
        puts(set_color("============================================================================", :bold))
        ssh.exec("[[ -e /var/chef/cache/chef-stacktrace.out ]] && cat /var/chef/cache/chef-stacktrace.out")
        print("\n")
      end
      if @options.log?
        puts
        puts("chef.log:")
        puts(set_color("============================================================================", :bold))
        ssh.exec("[[ -e /var/log/chef/client.log ]] && tail -n #{@options.lines} /var/log/chef/client.log")
      end
    end
    puts

  rescue Cucumber::Chef::Error => e
    $logger.fatal { e.backtrace.join("\n") }
    fatal(e)
  end

################################################################################

  desc "displayconfig", "Display the current cucumber-chef config."
  method_option :test, :type => :boolean, :desc => "INTERNAL USE ONLY"
  def displayconfig
    load_config

    puts
    say(Cucumber::Chef::Config.configuration.to_yaml, :bold)
    puts

  rescue Cucumber::Chef::Error => e
    $logger.fatal { e.backtrace.join("\n") }
    fatal(e.message)
  end

################################################################################

  desc "ps [ps-options]", "Snapshot of the current cucumber-chef test lab container processes."
  def ps(*args)
    load_config

    puts
    if (test_lab = Cucumber::Chef::TestLab.new) && (test_lab.labs_running.count > 0)
      ssh = Cucumber::Chef::SSH.new

      ssh.config[:host] = test_lab.labs_running.first.public_ip_address
      ssh.config[:ssh_user] = "ubuntu"
      ssh.config[:identity_file] = Cucumber::Chef.locate(:file, ".cucumber-chef", "id_rsa-#{ssh.config[:ssh_user]}")

      puts(set_color("Getting container processes from cucumber-chef test lab...", :blue, true))
      puts
      puts(set_color("============================================================================", :bold))
      ssh.exec("lxc-ps --lxc -- #{args.join(" ")}")
      print("\n")
    end
    puts

  rescue Cucumber::Chef::Error => e
    $logger.fatal { e.backtrace.join("\n") }
    fatal(e)
  end

################################################################################

  desc "info", "Display information about the current test lab."
  method_option :test, :type => :boolean, :desc => "INTERNAL USE ONLY"
  def info
    load_config

    puts
    if (test_lab = Cucumber::Chef::TestLab.new)
      test_lab.info
    end
    puts

  rescue Cucumber::Chef::Error => e
    $logger.fatal { e.backtrace.join("\n") }
    fatal(e.message)
  end

################################################################################

  desc "create <project>" , "Create a project template for testing an infrastructure."
  def create(project)

    create_project(project)
    root_dir = Cucumber::Chef.locate_parent(".chef")
    features_dir = File.join(root_dir, "features")
    feature = File.join(features_dir, "#{project}.feature")
    steps = File.join(features_dir, "step_definitions", "#{project}.steps")

    puts
    puts(set_color("Project created!", :green, true))
    say("Please look at the README in '#{features_dir}/#{project}/', and the example features (#{File.basename(feature)}) and steps (#{File.basename(steps)}), which I have autogenerated for you.", :green)
    puts

  rescue Cucumber::Chef::Error => e
    $logger.fatal { e.backtrace.join("\n") }
    fatal(e)
  end

################################################################################

  desc "test [cucumber-options]", "Test a project using the cucumber-chef test suite."
  method_option :destroy, :type => :boolean, :desc => "destroy all containers before test run", :aliases => "-z", :default => false
  def test(*args)
    load_config

    puts
    root_path = Cucumber::Chef.locate_parent(".cucumber-chef")
    features_path = File.expand_path(File.join(root_path, "features"))

    unless (File.exists?(features_path) && File.directory?(features_path))
      raise Error, "Features directory '#{features_path}' does not exist."
    else
      puts("Using features directory: #{features_path}")
    end

    runner = Cucumber::Chef::TestRunner.new(features_path)
    runner.run(@options.destroy?, args)
    puts

  rescue Cucumber::Chef::Error => e
    $logger.fatal { e.backtrace.join("\n") }
    fatal(e)
  end

################################################################################

end

CucumberChef.start