#!/usr/bin/ruby

require 'rubygems'
require 'thor'
require 'fileutils'
require 'net/https'
require 'powder/version'

module Powder
  class CLI < Thor
    include Thor::Actions
    default_task :help

    map '-r' => 'restart'
    map '-a' => 'always_restart'
    map '-l' => 'list'
    map '-L' => 'link'
    map '-d' => 'default'
    map '-o' => 'open'
    map '-v' => 'version'
    map 'update' => 'install'

    POWDER_CONFIG = ".powder"
    POW_PATH = "#{ENV['HOME']}/.pow"
    POW_DAEMON_PLIST_PATH="#{ENV['HOME']}/Library/LaunchAgents/cx.pow.powd.plist"
    POW_FIREWALL_PLIST_PATH = "/Library/LaunchDaemons/cx.pow.firewall.plist"

    desc "up", "Enable pow"
    def up
      if File.exists? POW_FIREWALL_PLIST_PATH
        %x{sudo launchctl load #{POW_FIREWALL_PLIST_PATH}}
      else
        say "Pow firewall configuration missing."
      end
      if File.exists? POW_DAEMON_PLIST_PATH
        %x{launchctl load #{POW_DAEMON_PLIST_PATH}}
      else
        say "Pow daemon configuration missing."
      end
    end

    desc "down", "Disable pow"
    def down
      if File.exists? POW_FIREWALL_PLIST_PATH
        if not %x{sudo launchctl list | grep cx.pow.firewall}.empty?
          %x{sudo launchctl unload #{POW_FIREWALL_PLIST_PATH}}
        end
        if ports = File.open(POW_FIREWALL_PLIST_PATH).read.match(/fwd .*?,([\d]+).*?dst-port ([\d]+)/)
          http_port, dst_port = ports[1..2]
        end
      end

      if File.exists? POW_DAEMON_PLIST_PATH
        %x{launchctl unload #{POW_DAEMON_PLIST_PATH}}
      end

      http_port ||= 20559
      dst_port ||= 80

      if rule = %x{sudo ipfw show | grep ",#{http_port} .* dst-port #{dst_port} in"}.split.first
        %x{sudo ipfw delete #{rule} && sudo sysctl -w net.inet.ip.forwarding=0}
      end
    end

    desc "link", "Link a pow"
    method_option :force, :type => :boolean, :default => false, :alias => '-f', :desc => "remove the old configuration, overwrite .powder"
    method_option :"no-config", :type => :boolean, :default => false, :alias => '-n', :desc => "do not write a .powder file"
    def link(name=nil)
      return unless is_powable?
      if File.symlink?(POW_PATH)
        current_path = %x{pwd}.chomp
        if name
          write_pow_config(name)
        else
          name = get_pow_name
        end
        symlink_path = "#{POW_PATH}/#{name}"
        FileUtils.rm_f(symlink_path) if options[:force]
        FileUtils.ln_s(current_path, symlink_path) unless File.exists?(symlink_path)
        say "Your application is now available at http://#{name}.#{domain}/"
      else
        say "Pow is not installed."
      end
    end

    desc "default", "Set this app as default"
    def default(name=nil)
      return unless is_powable?
      current_path = %x{pwd}.chomp
      name ||= get_pow_name
      symlink_path = "#{POW_PATH}/default"
      FileUtils.rm_f symlink_path if File.exists?(symlink_path)
      FileUtils.ln_sf(current_path, symlink_path)
      say "Your application(#{name}) is now default at http://localhost/"
    end

    desc "un_default", "remove current default app"
    def un_default(name=nil)
      name ||= get_pow_name
      symlink_path = "#{POW_PATH}/default"
      FileUtils.rm_f symlink_path if File.exists?(symlink_path)
    end

    desc "restart", "Restart current pow"
    def restart
      return unless is_powable?
      FileUtils.mkdir_p('tmp')
      %x{touch tmp/restart.txt}
    end

    desc "always_restart", "Always restart current pow"
    def always_restart
      return unless is_powable?
      FileUtils.mkdir_p('tmp')
      %x{touch tmp/always_restart.txt}
    end

    desc "no_restarts", "Reset this app's restart settings"
    def no_restarts
      return unless is_powable?
      FileUtils.rm_f Dir.glob('tmp/*restart.txt')
    end

    desc "list", "List current pows"
    def list
      pows = Dir[POW_PATH + "/*"].map do |link|
        realpath = File.readlink(link)
        app_is_current = (realpath == Dir.pwd) ? '*' : ' '
        [app_is_current, File.basename(link), realpath.gsub(ENV['HOME'], '~')]
      end
      print_table(pows)
    end

    desc "open", "Open a pow in the browser"
    def open(name=nil)
      %x{open http://#{name || get_pow_name}.#{domain}}
    end

    desc "unlink", "Unlink a pow app"
    method_option :delete, :type => :boolean, :default => false, :alias => '-e', :desc => "delete .powder"
    def unlink(name=nil)
      return unless is_powable?
      FileUtils.rm_f POW_PATH + '/' + (name || get_pow_name)
      say "Successfully removed #{(name || get_pow_name)}"
      if options[:delete]
        FileUtils.rm_f POWDER_CONFIG
        say "Successfully removed #{POWDER_CONFIG}"
      end
    end

    desc "remove", "An alias to Unlink (depreciated)"
    alias :remove :unlink

    desc "cleanup", "Clean up invalid symbolic link"
    def cleanup
      Dir[POW_PATH + "/*"].map { |symlink|
        FileUtils.rm(symlink) unless File.exists? File.readlink(symlink)
      }
    end

    desc "install", "Installs pow"
    def install
      %x{curl get.pow.cx | sh}
    end

    desc "log", "Tails the Pow log"
    def log
      path_to_log_file = "#{ENV['HOME']}/Library/Logs/Pow/apps/#{current_dir_name}.log"
      if File.exist? path_to_log_file
        system "tail -f #{path_to_log_file}"
      else
        say "There is no Pow log file, have you set this application up yet?"
      end
    end

    desc "applog", "Tails in current app"
    def applog(env="development")
      system "tail -f log/#{env}.log" if is_powable?
    end

    desc "uninstall", "Uninstalls pow"
    def uninstall
      %x{curl get.pow.cx/uninstall.sh | sh}
    end

    desc "version", "Shows the version"
    def version
       say "powder #{Powder::VERSION}"
    end

    desc "host", "Updates hosts file to map pow domains to 127.0.0.1"
    def host
      hosts_file_path = "/etc/hosts"
      pow_domain_records = Dir[POW_PATH + "/*"].map { |a| "127.0.0.1\t#{File.basename(a)}.#{domain}\t#powder" }
      hosts_file = File.read("/etc/hosts").split("\n").delete_if {|row| row =~ /.+(#powder)/}
      first_loopback_index = hosts_file.index {|i| i =~ /^(127.0.0.1).+/}
      hosts_file = hosts_file.insert(first_loopback_index + 1, pow_domain_records)
      File.open("#{ENV['HOME']}/hosts-powder", "w")  do
        |file| file.puts hosts_file.join("\n")
      end
      %x{cp #{hosts_file_path} #{ENV['HOME']}/hosts-powder.bak}
      %x{sudo mv #{ENV['HOME']}/hosts-powder #{hosts_file_path}}
      %x{dscacheutil -flushcache}
      say "Domains added to hosts file, old host file is saved at #{ENV['HOME']}/hosts-powder.bak"
    end

    desc "unhost", "Removes pow domains from hostfile"
    def unhost
      hosts_file_path = "/etc/hosts"
      hosts_file = File.read("/etc/hosts").split("\n").delete_if {|row| row =~ /.+(#powder)/}
      File.open("#{ENV['HOME']}/hosts-powder", "w")  do
        |file| file.puts hosts_file.join("\n")
      end
      %x{cp #{hosts_file_path} #{ENV['HOME']}/hosts-powder.bak}
      %x{sudo mv #{ENV['HOME']}/hosts-powder #{hosts_file_path}}
      %x{dscacheutil -flushcache}
      say "Domains removed from hosts file, old host file is saved at #{ENV['HOME']}/hosts-powder.bak"
    end

    desc "config", "Shows current pow configuration"
    def config
      results = %x{curl --silent -H host:pow localhost/config.json}.gsub(':','=>')
      return say("Error: Cannot get Pow config. Pow may be down. Try 'powder up' first.") if results.empty? || !(results =~ /^\{/)
      json = eval results
      json.each do |k,v|
        case v
        when String, Numeric
          say "#{k.ljust(12,' ')} #{v}"
        when Array
          say "#{k.ljust(12,' ')} #{v.join ', '}\n"
        end
      end
    end

    desc "status", "Shows current pow status"
    def status
      results = %x{curl --silent -H host:pow localhost/status.json}.gsub(':','=>')
      return say("Error: Cannot get Pow status. Pow may be down. Try 'powder up' first.") if results.empty? || !(results =~ /^\{/)
      json = eval results
      json.each {|k,v| say "#{k.ljust(12, ' ')} #{v}"}
    end

    private

    def current_dir_name
      File.basename(%x{pwd}.chomp)
    end

    def configured_pow_name
      return nil unless File.exists?(POWDER_CONFIG)

      File.foreach(POWDER_CONFIG) do |line|
        next if line =~ /^($|#)/
        return line.chomp
      end

      return nil
    end

    def current_dir_pow_name
      current_dir_name.tr('_', '-')
    end

    def get_pow_name
      configured_pow_name || current_dir_pow_name
    end

    def write_pow_config(name=nil)
      return if ! name || options[:"no-config"]
      powder_exists = File.exists?(POWDER_CONFIG)
      configured_name = get_pow_name

      unlink if powder_exists && configured_name != name

      if options[:force] || ! powder_exists
        File.open(POWDER_CONFIG, "w") do |f|
          f.puts(name)
        end
        say "Created powder config #{POWDER_CONFIG}"
      elsif !options[:force] && powder_exists && configured_name != name
        say "Cowardly refusing to overwrite #{POWDER_CONFIG}"
        exit 1
      end
    end

    def is_powable?
      if File.exists?('config.ru') || File.exists?('public/index.html')
        true
      elsif legacy = (is_rails2_app? || is_radiant_app?)
        say "This appears to be a #{legacy} applicaton. You need a config.ru file."
        if yes? "Do you want to autogenerate a basic config.ru for #{legacy}?"
          uri = URI.parse("https://raw.github.com/gist/909308")
          http = Net::HTTP.new(uri.host, uri.port)
          http.use_ssl = true
          http.verify_mode = OpenSSL::SSL::VERIFY_NONE
          request = Net::HTTP::Get.new(uri.request_uri)
          create_file "config.ru",  http.request(request).body
          return true
        else
          say "Did not create config.ru"
          return false
        end
      else
        say "This does not appear to be a rack app as there is no config.ru."
        say "Pow can also host static apps if there is an index.html in public/"
        return false
      end
    end

    def is_rails2_app?
      File.exists?('config/environment.rb') &&
        !`grep RAILS_GEM_VERSION config/environment.rb`.empty? ? 'Rails 2' : nil
    end

    def is_radiant_app?
      File.exists?('config/environment.rb') &&
        !`grep Radiant::Initializer config/environment.rb`.empty? ? 'Radiant' : nil
    end

    def domain
      if File.exists? File.expand_path('~/.powconfig')
        returned_domain = %x{source ~/.powconfig; echo $POW_DOMAINS}.gsub("\n", "").split(",").first
        returned_domain = %x{source ~/.powconfig; echo $POW_DOMAIN}.gsub("\n", "") if returned_domain.nil? || returned_domain.empty?
        returned_domain = 'dev' if returned_domain.nil? || returned_domain.empty?
        returned_domain
      else
        'dev'
      end
    end
  end
end
Powder::CLI.start