# typed: false
# frozen_string_literal: true

require "cli/parser"
require "utils/github"

module Homebrew
  extend T::Sig

  module_function

  sig { returns(CLI::Parser) }
  def update_maintainers_args
    Homebrew::CLI::Parser.new do
      description <<~EOS
        Update the list of maintainers in the `Homebrew/brew` README.
      EOS

      named_args :none
    end
  end

  def update_maintainers
    update_maintainers_args.parse

    # We assume that only public members wish to be included in the README
    public_members = GitHub.public_member_usernames("Homebrew")

    plc = GitHub.members_by_team("Homebrew", "plc")
    tsc = GitHub.members_by_team("Homebrew", "tsc")
    linux = GitHub.members_by_team("Homebrew", "linux")
    other = GitHub.members_by_team("Homebrew", "maintainers")
    other.except!(*[plc, tsc, linux].map(&:keys).flatten.uniq)

    sentences = [plc, tsc, linux, other].map do |h|
      h.slice!(*public_members)
      h.each { |k, v| h[k] = "[#{v}](https://github.com/#{k})" }
      h.values.sort.to_sentence
    end

    readme = HOMEBREW_REPOSITORY/"README.md"

    content = readme.read
    content.gsub!(/(Homebrew's \[Project Leadership Committee.*) is .*\./,
                  "\\1 is #{sentences[0]}.")
    content.gsub!(/(Homebrew's \[Technical Steering Committee.*) is .*\./,
                  "\\1 is #{sentences[1]}.")
    content.gsub!(%r{(Homebrew/brew's Linux maintainers are).*\.},
                  "\\1 #{sentences[2]}.")
    content.gsub!(/(Homebrew's other current maintainers are).*\./,
                  "\\1 #{sentences[3]}.")

    File.open(readme, "w+") { |f| f.write(content) }

    diff = system_command "git", args: [
      "-C", HOMEBREW_REPOSITORY, "diff", "--exit-code", "README.md"
    ]
    if diff.status.success?
      puts "No changes to list of maintainers."
    else
      puts "List of maintainers updated in README."
    end
  end
end