require_relative 'action'

module Arli
  module Actions
    # The purpose of this action is to fix the directory
    # name of the library, that's possibly incorrect.
    # For example, library "Adafruit Unified Sensor" installs
    # into the folder 'Adafruit_Unified_Sensor'
    # while the source files inside are 'Adafruit_Sensor.h'
    # This action renames invalid library folders based on the
    # source files found inside.
    class DirName < Action
      attr_accessor :sources, :headers

      def act
        find_source_files

        # so "dir" is the 'Adafruit_Unified_Sensor'
        # but we found header Adafruit_Sensor we should
        # rename the folder

        if headers.include?(dir) || sources.include?(dir)
          print_target_dir(dir)
        else
          # if we end up setting this, we'll also move the folder.
          canonical_dir =
              if_only_one(headers) ||
                  if_only_one(sources) ||
                  if_header_a_substring(headers)

          if canonical_dir
            library.canonical_dir = canonical_dir
            mv(dir, library.canonical_dir)
            print_target_dir(canonical_dir)
          else
            library.canonical_dir = dir
            print_target_dir(dir)
          end
        end


      end

      def print_target_dir(d)
        ___ " installed to #{d.green} #{'✔'.green}" unless Arli.config.quiet
      end

      def if_header_a_substring(files)
        files.find { |file| dir.start_with?(file) }
      end

      def if_only_one(file_names)
        if file_names.size == 1 && file_names.first != dir
          file_names.first
        end
      end

      def find_source_files
        Dir.chdir(dir) do
          self.sources = files_with_extension('**.{cpp,c}')
          self.headers = files_with_extension('**.{h}')
        end
      end

      EXT_REGEX = /\.(cpp|h|c)$/
      EXT_CHOMP = ->(f) { f.gsub(EXT_REGEX, '') }

      def files_with_extension(pattern)
        Dir.glob(pattern).map(&EXT_CHOMP)
      end
    end
  end
end