# typed: true
# frozen_string_literal: true

require "cli/parser"
require "livecheck/livecheck"

module Homebrew
  extend T::Sig

  module_function

  sig { returns(CLI::Parser) }
  def bump_args
    Homebrew::CLI::Parser.new do
      description <<~EOS
        Display out-of-date brew formulae and the latest version available.
        Also displays whether a pull request has been opened with the URL.
      EOS
      switch "--no-pull-requests",
             description: "Do not retrieve pull requests from GitHub."
      switch "--formula", "--formulae",
             description: "Check only formulae."
      switch "--cask", "--casks",
             description: "Check only casks."
      flag   "--limit=",
             description: "Limit number of package results returned."

      conflicts "--cask", "--formula"

      named_args [:formula, :cask]
    end
  end

  def bump
    args = bump_args.parse

    if args.limit.present? && !args.formula? && !args.cask?
      raise UsageError, "`--limit` must be used with either `--formula` or `--cask`."
    end

    formulae_and_casks = if args.formula?
      args.named.to_formulae.presence
    elsif args.cask?
      args.named.to_casks.presence
    else
      args.named.to_formulae_and_casks.presence
    end

    limit = args.limit.to_i if args.limit.present?

    if formulae_and_casks
      Livecheck.load_other_tap_strategies(formulae_and_casks)

      formulae_and_casks.each_with_index do |formula_or_cask, i|
        puts if i.positive?

        name = Livecheck.formula_or_cask_name(formula_or_cask)
        repository = if formula_or_cask.is_a?(Formula)
          if formula_or_cask.head_only?
            ohai name
            puts "Formula is HEAD-only."
            next
          end

          "homebrew"
        else
          "homebrew_casks"
        end

        package_data = Repology.single_package_query(name, repository: repository)
        retrieve_and_display_info(formula_or_cask, name, package_data&.values&.first, args: args)
      end
    else
      api_response = {}
      api_response[:formulae] = Repology.parse_api_response(limit, repository: "homebrew") unless args.cask?
      api_response[:casks] = Repology.parse_api_response(limit, repository: "homebrew_casks") unless args.formula?

      api_response.each do |package_type, outdated_packages|
        repository = if package_type == :formulae
          "homebrew"
        else
          "homebrew_casks"
        end

        outdated_packages.each_with_index do |(_name, repositories), i|
          homebrew_repo = repositories.find do |repo|
            repo["repo"] == repository
          end

          next if homebrew_repo.blank?

          formula_or_cask = begin
            if repository == "homebrew"
              Formula[homebrew_repo["srcname"]]
            else
              Cask::CaskLoader.load(homebrew_repo["srcname"])
            end
          rescue
            next
          end
          name = Livecheck.formula_or_cask_name(formula_or_cask)

          puts if i.positive?
          retrieve_and_display_info(formula_or_cask, name, repositories, args: args)

          break if limit && i >= limit
        end
      end
    end
  end

  def livecheck_result(formula_or_cask)
    skip_result = Livecheck::SkipConditions.skip_information(formula_or_cask)
    if skip_result.present?
      return "#{skip_result[:status]}#{" - #{skip_result[:messages].join(", ")}" if skip_result[:messages].present?}"
    end

    version_info = Livecheck.latest_version(
      formula_or_cask,
      json: true, full_name: false, verbose: false, debug: false,
    )
    latest = version_info[:latest] if version_info.present?

    return "unable to get versions" if latest.blank?

    latest.to_s
  end

  def retrieve_pull_requests(formula_or_cask, name)
    pull_requests = GitHub.fetch_pull_requests(name, formula_or_cask.tap&.full_name, state: "open")
    if pull_requests.try(:any?)
      pull_requests = pull_requests.map { |pr| "#{pr["title"]} (#{Formatter.url(pr["html_url"])})" }.join(", ")
    end

    return "none" if pull_requests.blank?

    pull_requests
  end

  def retrieve_and_display_info(formula_or_cask, name, repositories, args:)
    current_version = if formula_or_cask.is_a?(Formula)
      formula_or_cask.stable.version
    else
      Version.new(formula_or_cask.version)
    end

    repology_latest = if repositories.present?
      Repology.latest_version(repositories)
    else
      "not found"
    end

    livecheck_latest = livecheck_result(formula_or_cask)
    pull_requests = retrieve_pull_requests(formula_or_cask, name) unless args.no_pull_requests?

    title = if current_version == repology_latest &&
               current_version == livecheck_latest
      "#{name} is up to date!"
    else
      name
    end

    ohai title
    puts <<~EOS
      Current formula version:  #{current_version}
      Latest Repology version:  #{repology_latest}
      Latest livecheck version: #{livecheck_latest}
    EOS
    puts "Open pull requests:       #{pull_requests}" unless args.no_pull_requests?
  end
end