# frozen_string_literal: true

module Codeowners
  module Cli
    # List changed files. Provide an option to list all the changed files grouped by
    # the owner of the file or filter them and show only the files owned by default owner.
    class Filter < Base
      option :from, default: 'origin/master'
      option :to, default: 'HEAD'
      option :verbose, default: false, type: :boolean, aliases: '-v'
      desc 'by <owner>', <<~DESC
        Lists changed files owned by owner.
        If no owner is specified, default owner is taken from the config file.
      DESC
      # option :local, default: false, type: :boolean, aliases: '-l'
      # option :branch, default: '', aliases: '-b'
      def by(owner = config.default_owner)
        return if owner.empty?

        changes = checker.changes_with_ownership(owner)
        if changes.key?(owner)
          changes.values.each { |file| puts file }
        else
          puts "Owner #{owner} not defined in .github/CODEOWNERS"
        end
      end

      option :from, default: 'origin/master'
      option :to, default: 'HEAD'
      option :verbose, default: false, type: :boolean, aliases: '-v'
      desc 'all', 'Lists all changed files grouped by owner'
      def all
        changes = checker.changes_with_ownership.select { |_owner, val| val && !val.empty? }
        changes.keys.each do |owner|
          puts(owner + ":\n  " + changes[owner].join("\n  ") + "\n\n")
        end
      end

      def initialize(args = [], options = {}, config = {})
        super
        @repo_base_path = `git rev-parse --show-toplevel`
        if !@repo_base_path || @repo_base_path.empty?
          raise 'You must be positioned in a git repository to use this tool'
        end

        @repo_base_path.chomp!
        Dir.chdir(@repo_base_path)

        @checker ||= config[:checker] || default_checker
      end

      default_task :by

      private

      attr_reader :checker

      def default_checker
        Codeowners::Checker.new(@repo_base_path, options[:from], options[:to])
      end
    end
  end
end