# encoding: utf-8
require 'fedux_org_stdlib/require_files'
require 'fedux_org_stdlib/logging/logger'

require_library %w(pathname)

module FeduxOrgStdlib
  class RecursiveFileFinder
    # Create a new instance of finder
    #
    # It tries to find a file.
    #
    # @param [String] file_name
    #   The name of the file to be looked for
    #
    # @param [String] working_directory
    #   The directory where to start search
    #
    # @return [RecursiveFileFinder]
    #   The config instance. If the resulting data structure created by the
    #   config_engine does not respond to `:[]` an empty config object will be
    #   created.

    attr_reader :working_directory, :logger, :file_name, :raise_error

    def initialize(
      file_name:,
      working_directory: Dir.getwd,
      logger: FeduxOrgStdlib::Logging::Logger.new,
      raise_error: true
    )
      @logger            = logger
      @working_directory = Pathname.new(working_directory).expand_path
      @file_name         = Pathname.new(file_name)
      @raise_error       = raise_error
    end

    # Return path to file
    #
    # @raise [Errno::ENOENT]
    #   If file cannot be found
    #
    # @return [Pathname]
    #   The path
    def file
      return @found_path if @found_path

      @found_path = nil

      working_directory.ascend do |p|
        path = p + file_name
        @found_path = path if path.exist?
      end

      return @found_path if @found_path
      fail Errno::ENOENT, file_name.to_s  if raise_error

      nil
    end

    # The directory where file was found
    #
    # @raise [Errno::ENOENT]
    #   If file cannot be found
    #
    # @return [Pathname]
    #   The path to directory
    def directory
      return file.dirname if file

      fail Errno::ENOENT, file_name.to_s  if raise_error

      nil
    end
  end
end