class Thor::Runner

def self.banner(command, all = false, subcommand = false)
  "thor " + command.formatted_usage(self, all, subcommand)
end

def self.exit_on_failure?
  true
end

def display_commands(namespace, list) #:nodoc:
  list.sort! { |a, b| a[0] <=> b[0] }
  say shell.set_color(namespace, :blue, true)
  say "-" * namespace.size
  print_table(list, :truncate => true)
  say
end

def display_klasses(with_modules = false, show_internal = false, klasses = Thor::Base.subclasses)
  klasses -= [Thor, Thor::Runner, Thor::Group] unless show_internal
  raise Error, "No Thor commands available" if klasses.empty?
  show_modules if with_modules && !thor_yaml.empty?
  list = Hash.new { |h, k| h[k] = [] }
  groups = klasses.select { |k| k.ancestors.include?(Thor::Group) }
  # Get classes which inherit from Thor
  (klasses - groups).each { |k| list[k.namespace.split(":").first] += k.printable_commands(false) }
  # Get classes which inherit from Thor::Base
  groups.map! { |k| k.printable_commands(false).first }
  list["root"] = groups
  # Order namespaces with default coming first
  list = list.sort { |a, b| a[0].sub(/^default/, "") <=> b[0].sub(/^default/, "") }
  list.each { |n, commands| display_commands(n, commands) unless commands.empty? }
end

def help(meth = nil)
  if meth && !respond_to?(meth)
    initialize_thorfiles(meth)
    klass, command = Thor::Util.find_class_and_command_by_namespace(meth)
    self.class.handle_no_command_error(command, false) if klass.nil?
    klass.start(["-h", command].compact, :shell => shell)
  else
    super
  end
end

def initialize_thorfiles(relevant_to = nil, skip_lookup = false)
  thorfiles(relevant_to, skip_lookup).each do |f|
    Thor::Util.load_thorfile(f, nil, options[:debug]) unless Thor::Base.subclass_files.keys.include?(File.expand_path(f))
  end
end

def install(name) # rubocop:disable MethodLength
  initialize_thorfiles
  # If a directory name is provided as the argument, look for a 'main.thor'
  # command in said directory.
  begin
    if File.directory?(File.expand_path(name))
      base = File.join(name, "main.thor")
      package = :directory
      contents = open(base, &:read)
    else
      base = name
      package = :file
      contents = open(name, &:read)
    end
  rescue OpenURI::HTTPError
    raise Error, "Error opening URI '#{name}'"
  rescue Errno::ENOENT
    raise Error, "Error opening file '#{name}'"
  end
  say "Your Thorfile contains:"
  say contents
  unless options["force"]
    return false if no?("Do you wish to continue [y/N]?")
  end
  as = options["as"] || begin
    first_line = contents.split("\n")[0]
    (match = first_line.match(/\s*#\s*module:\s*([^\n]*)/)) ? match[1].strip : nil
  end
  unless as
    basename = File.basename(name)
    as = ask("Please specify a name for #{name} in the system repository [#{basename}]:")
    as = basename if as.empty?
  end
  location = if options[:relative] || name =~ %r{^https?://}
    name
  else
    File.expand_path(name)
  end
  thor_yaml[as] = {
    :filename   => Digest::MD5.hexdigest(name + as),
    :location   => location,
    :namespaces => Thor::Util.namespaces_in_content(contents, base)
  }
  save_yaml(thor_yaml)
  say "Storing thor file in your system repository"
  destination = File.join(thor_root, thor_yaml[as][:filename])
  if package == :file
    File.open(destination, "w") { |f| f.puts contents }
  else
    FileUtils.cp_r(name, destination)
  end
  thor_yaml[as][:filename] # Indicate success
end

def installed
  initialize_thorfiles(nil, true)
  display_klasses(true, options["internal"])
end

def list(search = "")
  initialize_thorfiles
  search = ".*#{search}" if options["substring"]
  search = /^#{search}.*/i
  group  = options[:group] || "standard"
  klasses = Thor::Base.subclasses.select do |k|
    (options[:all] || k.group == group) && k.namespace =~ search
  end
  display_klasses(false, false, klasses)
end

def method_missing(meth, *args)
  meth = meth.to_s
  initialize_thorfiles(meth)
  klass, command = Thor::Util.find_class_and_command_by_namespace(meth)
  self.class.handle_no_command_error(command, false) if klass.nil?
  args.unshift(command) if command
  klass.start(args, :shell => shell)
end

def save_yaml(yaml)
  yaml_file = File.join(thor_root, "thor.yml")
  unless File.exist?(yaml_file)
    FileUtils.mkdir_p(thor_root)
    yaml_file = File.join(thor_root, "thor.yml")
    FileUtils.touch(yaml_file)
  end
  File.open(yaml_file, "w") { |f| f.puts yaml.to_yaml }
end

def show_modules #:nodoc:
  info = []
  labels = %w(Modules Namespaces)
  info << labels
  info << ["-" * labels[0].size, "-" * labels[1].size]
  thor_yaml.each do |name, hash|
    info << [name, hash[:namespaces].join(", ")]
  end
  print_table info
  say ""
end

def thor_root
  Thor::Util.thor_root
end

def thor_yaml
  @thor_yaml ||= begin
    yaml_file = File.join(thor_root, "thor.yml")
    yaml = YAML.load_file(yaml_file) if File.exist?(yaml_file)
    yaml || {}
  end
end

def thorfiles(relevant_to = nil, skip_lookup = false)
  thorfiles = []
  unless skip_lookup
    Pathname.pwd.ascend do |path|
      thorfiles = Thor::Util.globs_for(path).map { |g| Dir[g] }.flatten
      break unless thorfiles.empty?
    end
  end
  files  = (relevant_to ? thorfiles_relevant_to(relevant_to) : Thor::Util.thor_root_glob)
  files += thorfiles
  files -= ["#{thor_root}/thor.yml"]
  files.map! do |file|
    File.directory?(file) ? File.join(file, "main.thor") : file
  end
end

def thorfiles_relevant_to(meth)
  lookup = [meth, meth.split(":")[0...-1].join(":")]
  files = thor_yaml.select do |_, v|
    v[:namespaces] && !(v[:namespaces] & lookup).empty?
  end
  files.map { |_, v| File.join(thor_root, (v[:filename]).to_s) }
end

def uninstall(name)
  raise Error, "Can't find module '#{name}'" unless thor_yaml[name]
  say "Uninstalling #{name}."
  FileUtils.rm_rf(File.join(thor_root, (thor_yaml[name][:filename]).to_s))
  thor_yaml.delete(name)
  save_yaml(thor_yaml)
  puts "Done."
end

def update(name)
  raise Error, "Can't find module '#{name}'" if !thor_yaml[name] || !thor_yaml[name][:location]
  say "Updating '#{name}' from #{thor_yaml[name][:location]}"
  old_filename = thor_yaml[name][:filename]
  self.options = options.merge("as" => name)
  if File.directory? File.expand_path(name)
    FileUtils.rm_rf(File.join(thor_root, old_filename))
    thor_yaml.delete(old_filename)
    save_yaml(thor_yaml)
    filename = install(name)
  else
    filename = install(thor_yaml[name][:location])
  end
  File.delete(File.join(thor_root, old_filename)) unless filename == old_filename
end

def version
  require "thor/version"
  say "Thor #{Thor::VERSION}"
end