# frozen_string_literal: true

module MovieCleaner
  # Cleaner prints commands to remove all unwanted movie files in a directory
  class Cleaner
    def initialize(base_path, verbose = false, possible_resolutions = nil)
      @base_path = base_path
      @verbose = verbose
      @possible_resolutions = possible_resolutions || %w[1080p 720p]
    end

    def sub_par_files
      sub_par_files_per_movie.flat_map do |movie, files|
        next if files.empty?

        files.map { |file| full_path(movie, file) }
      end.compact
    end

    def print_rm_commands
      sub_par_files_per_movie.each do |movie, files|
        vputs "Found sub-par files for movie '#{movie}':"
        print_rm_commands_for_files(movie, files)
        vputs ''
      end
    end

    private

    def print_rm_commands_for_files(movie, files)
      files.each do |f|
        puts "rm '#{full_path(movie, f)}'"
      end
    end

    def sub_par_files_per_movie
      movie_files.map do |movie, files|
        current_sub_par_files = []
        @possible_resolutions.each do |resolution|
          next if files.none? { |f| f.include?(resolution) }

          current_sub_par_files = files.reject { |f| f.include?(resolution) }
          break
        end
        next if current_sub_par_files.empty?

        [movie, current_sub_par_files]
      end.compact.to_h
    end

    def movie_files
      @movie_files ||= Dir["#{@base_path}/*"].map do |dir|
        [
          File.basename(dir),
          Dir["#{dir}/*.{mkv,mov,mp4}"].map { |f| File.basename(f) }
        ]
      end.to_h
    end

    def full_path(movie, file)
      "#{@base_path}/#{movie}/#{file}"
    end

    def vputs(*args)
      puts args if @verbose
    end
  end
end