#!/usr/bin/env ruby
# version.rb version 1.9.1 (for Chromebrew)

OPTIONS = %w[-h --help -j --json -u --update-package-files -v --verbose]

if ARGV.include?('-h') || ARGV.include?('--help')
  abort <<~EOM
    Usage: ./version.rb [<package>] #{OPTIONS.to_s.gsub('"', '')}
    Example: ./version.rb abcde -v
    The <package> can contain '*': ./version.rb "xorg_*"
    If <package> is omitted, all packages will be processed.
    Passing --update-package-files or -u will try to update the version
    field in the package file.
    Passing --json or -j will only give json output.
  EOM
end

require 'fileutils'
require 'json'
require 'net/http'
require 'uri/http'

crew_local_repo_root = `git rev-parse --show-toplevel 2> /dev/null`.chomp
# When invoked from crew, pwd is CREW_DEST_DIR, so crew_local_repo_root
# is empty.
crew_local_repo_root = '../' if crew_local_repo_root.to_s.empty?
require File.join(crew_local_repo_root, 'lib/color')
require File.join(crew_local_repo_root, 'lib/const')
require File.join(crew_local_repo_root, 'lib/convenience_functions')
require File.join(crew_local_repo_root, 'lib/package')
require File.join(crew_local_repo_root, 'lib/package_utils')
require File.join(crew_local_repo_root, 'lib/require_gem')
require_gem 'ruby-libversion', 'ruby_libversion'
require_gem('ptools')

# Add >LOCAL< lib to LOAD_PATH
$LOAD_PATH.unshift File.join(crew_local_repo_root, 'lib')

OUTPUT_JSON = ARGV.include?('-j') || ARGV.include?('--json')
UPDATE_PACKAGE_FILES = ARGV.include?('-u') || ARGV.include?('--update-package-files')
VERBOSE = ARGV.include?('-v') || ARGV.include?('--verbose')
bc_updated = {}
@pkg_names = {}
updatable_pkg = {}
version_line_string = {}
versions_updated = {}
versions = []

def get_version(name, homepage, source)
  # Determine if the source is a GitHub repository, but skip if there
  # is an anitya name mapping.
  unless source.nil? || source.is_a?(Hash) || %w[Pip].include?(@pkg.superclass.to_s) || CREW_ANITYA_PACKAGE_NAME_MAPPINGS.keys.find_index { |i| i == name }
    source.sub!('www.', '')
    url = URI.parse(source)
    if url.host == 'github.com'
      url_parts = url.path.split('/')
      unless url_parts.count < 3
        repo = "#{url_parts[1]}/#{url_parts[2].gsub(/.git\z/, '')}"
        puts "GitHub Repo is #{repo}" if VERBOSE
        # Note that we only check releases on GitHub since semantic
        # version ordering isn't easy to get from tags.
        # You can get the last numeric tag using:
        # git -c 'versionsort.suffix=-' \
        # ls-remote --exit-code --refs --sort='version:refname' --tags https://github.com/#{repo} '*.*.*' \
        # | tail --lines=1 \
        # | cut --delimiter='/' --fields=3
        # However, since that does miss text tags, better to just punt
        # to ANITYA if releases do not exist.
        if File.which('gh')
          # This allows us to only get non-pre-release versions from
          # GitHub if such releases exist.
          github_ver = `gh release ls --exclude-pre-releases --exclude-drafts -L 1 -R #{repo} --json tagName -q '.[] | .tagName'`.chomp if system 'gh auth status >/dev/null', exception: false
        else
          github_ver = `curl https://api.github.com/repos/#{repo}/releases/latest -s | jq .name -r`.chomp
        end
        return github_ver unless github_ver.blank? || github_ver == 'null'
      end
    end
  end
  anitya_name_mapping_idx = CREW_ANITYA_PACKAGE_NAME_MAPPINGS.keys.find_index { |i| i == name }
  anitya_name = name.gsub(/\Apy\d_|\Aperl_|\Aruby_/, '').tr('_', '-')
  anitya_name = CREW_ANITYA_PACKAGE_NAME_MAPPINGS.values[anitya_name_mapping_idx] unless anitya_name_mapping_idx.nil?
  anitya_id = get_anitya_id(anitya_name, homepage)
  puts "anitya_name: #{anitya_name} anitya_id: #{anitya_id}" if VERBOSE
  # If we weren't able to get an Anitya ID, return early here to save time and headaches
  return if anitya_id.nil?
  # Get the latest stable version of the package
  json = JSON.parse(Net::HTTP.get(URI("https://release-monitoring.org/api/v2/versions/?project_id=#{anitya_id}")))
  return if json['stable_versions'].nil?
  return json['stable_versions'][0]
end

def get_anitya_id(name, homepage)
  # Ignore python pip and ruby gem packages in the Pip and RUBY
  # superclasses.
  return if %w[Pip RUBY].include?(@pkg.superclass.to_s)

  # Find out how many packages Anitya has with the provided name.
  json = JSON.parse(Net::HTTP.get(URI("https://release-monitoring.org/api/v2/projects/?name=#{name}")))
  number_of_packages = json['total_items']

  if number_of_packages == 1 # We assume we have the right package, take the ID and move on.
    return json['items'][0]['id']
  elsif number_of_packages.zero? # Anitya either doesn't have this package, or has it under a different name.
    # If it has it under a different name, check if it has the name used by Chromebrew.
    json2 = JSON.parse(Net::HTTP.get(URI("https://release-monitoring.org/api/v2/packages/?name=#{name.tr('-', '_')}")))
    return if json2['total_items'].zero?

    (0..(json2['total_items'] - 1)).each do |i|
      next unless json2['items'][i]['distribution'] == 'Chromebrew'
      return get_anitya_id(json2['items'][i]['project'], homepage) if json2['items'][i]['name'] == name.tr('-', '_')
    end
  else # Anitya has more than one package with this exact name.
    candidates = []
    # First, we remove any candidates which are provided by language package managers, such as pip.
    # This is because Chromebrew does not repackage them (#7713), so they won't be what we're looking for.
    # (Allow non Pip superclass Python packages through.)
    (0..(number_of_packages - 1)).each do |i|
      if %w[Python].include?(@pkg.superclass.to_s)
        candidates.append(i) if json['items'][i]['ecosystem'] == 'pypi'
      elsif %w[PERL].include?(@pkg.superclass.to_s)
        candidates.append(i) if json['items'][i]['backend'] == 'CPAN (perl)'
      elsif json['items'][i]['ecosystem'] == json['items'][i]['homepage']
        # If a package is not provided by a language package manager, the ecosystem will be set to the homepage.
        # https://release-monitoring.org/static/docs/api.html#get--api-v2-projects-
        candidates.append(i)
      end
    end

    if candidates.length == 1 # If there's only one candidate left, we're done.
      return json['items'][candidates[0]]['id']
    elsif candidates.empty? # The package we're looking for is provided by a language package manager.
      # We probably shouldn't be providing this package.
      return
    else # There are still multiple candidates left.
      # This is where things get a little uncertain.
      # We check if the homepage Anitya has matches ours, but this really only works for Github projects.
      # For other projects, there's a lot more opinion involved in choosing the exact homepage.
      # Nevertheless, its our best shot at this point.
      candidates.each do |candidate|
        # We assume there is only one candidate with the same name and homepage as their crew counterpart.
        # Even if there are multiple candidates with the same name and homepage, its probably fine to treat them as identical.
        # If it isn't fine to treat them as identical, something has gone horribly wrong.
        return json['items'][candidate]['id'] if homepage == json['items'][candidate]['homepage']
      end

      # If we're still here, that means none of the candidates had the same homepage as their crew counterpart.
      # Not much we can do at this point to find the version, and its better to be cautious to avoid getting the wrong candidate.
      return
    end
  end
end

filelist = []
if ARGV.length.positive? && !(ARGV.length == 1 && OPTIONS.include?(ARGV[0]))
  ARGV.each do |arg|
    arg = arg.gsub('.rb', '')
    next unless arg =~ /^[0-9a-zA-Z\_\*]+$/
    if arg.include?('*')
      Dir[File.join(crew_local_repo_root, "packages/#{arg}.rb")].each do |filename|
        filelist.push filename
      end
    else
      filename = File.join(crew_local_repo_root, "packages/#{arg}.rb")
      filelist.push filename if File.exist?(filename)
    end
  end
else
  Dir[File.join(crew_local_repo_root, 'packages/*.rb')].each do |filename|
    filelist.push filename
  end
end

if filelist.length.positive?
  max_pkg_name_length = File.basename(filelist.max_by(&:length)).length - 3
  package_field_length = [max_pkg_name_length, 7].max + 1
  status_field_length = 17
  version_field_length = 13

  puts "#{'Package'.ljust(package_field_length)}#{'Status'.ljust(status_field_length)}#{'Current'.ljust(version_field_length)}#{'Upstream'.ljust(version_field_length)}Updatable?" unless OUTPUT_JSON
  puts "#{'-------'.ljust(package_field_length)}#{'------'.ljust(status_field_length)}#{'-------'.ljust(version_field_length)}#{'--------'.ljust(version_field_length)}----------" unless OUTPUT_JSON
  filelist.each do |filename|
    @pkg = Package.load_package(filename)
    if @pkg.is_fake?
      # Just skip is_fake packages.
      versions_updated[@pkg.name.to_sym] = 'Fake'
      updatable_pkg[@pkg.name.to_sym] = 'No'
      next
    end
    # Mark package file as updatable (i.e., the version field can be
    # updated in the package file) if the string "version" is on the
    # git_hashtag line or the string "#{version}" is on the source_url
    # line.
    updatable_pkg[@pkg.name.to_sym] = if @pkg.source_url.is_a?(Hash)
                                        # source_url hashes are not
                                        # automatically updatable.
                                        'source_url hash'
                                      elsif @pkg.source_url.include?('SKIP')
                                        'Yes'
                                      # If there is a git_hashtag, we can
                                      # check to see if 'version' is on
                                      # that line.
                                      elsif !@pkg.git_hashtag.blank?
                                        if `grep "^  git_hashtag" #{filename} | grep version`.empty?
                                          'static git_hashtag'
                                        else
                                          'Yes'
                                        end
                                      # If a source_url exists check if
                                      # that line has 'version' in it.
                                      elsif !@pkg.source_url.nil?
                                        if `grep source_url #{filename} | grep '\#{version}'`.empty?
                                          'static source_url'
                                        else
                                          'Yes'
                                        end
                                      # Assume true otherwise.
                                      # rubocop:disable Lint/DuplicateBranch
                                      else
                                        'Yes'
                                      end
    # rubocop:enable Lint/DuplicateBranch
    @pkg_names[@pkg.name.to_sym] = @pkg.name
    version_line_string[@pkg.name.to_sym] = ''
    # We annotate some packages to let us know that they won't work here.
    versions_updated[@pkg.name.to_sym] = 'Up to date.' if @pkg.no_upstream_update?

    if %w[RUBY].include?(@pkg.superclass.to_s)
      gem_name = @pkg.name.sub('ruby_', '')
      # We replace all dashes with underscores in our initial package names, but some gems actually use underscores, so we need special cases.
      # This list was created by looking at what packages were listed as not having updates in rubygems, and then looking up the upstream name for them.
      if %w[
        connection_pool error_highlight jaro_winkler
        lint_roller method_source mini_mime multi_xml mutex_m
        power_assert regexp_parser repl_type_completor ruby2_keywords
        syntax_suggest
      ].include?(gem_name)
        # These gems used underscores originally, so don't replace anything
      elsif gem_name == 'language_server_protocol'
        # These gems have an underscore then a dash, but there's only one, so we hardcode the logic for now.
        gem_name = 'language_server-protocol'
      elsif gem_name == 'unicode_display_width'
        # These gems have a dash then an underscore, but there's only one, so we hardcode the logic for now.
        gem_name = 'unicode-display_width'
      else
        # In the common case, the gem name used only dashes, which we all replaced with underscores.
        gem_name.gsub!('_', '-')
      end
      upstream_version = JSON.parse(Net::HTTP.get(URI("https://rubygems.org/api/v1/versions/#{gem_name}/latest.json")))['version']
    elsif %w[Pip].include?(@pkg.superclass.to_s)
      versions_updated[@pkg.name.to_sym] = 'Not Found.' if @pkg.name[/#{CREW_AUTOMATIC_VERSION_UPDATE_EXCLUSION_REGEX}/]
      pip_name = @pkg.name.sub(/\Apy\d_/, '').gsub('_', '-')
      begin
        upstream_version = `pip index versions #{'--pre' if @pkg.prerelease?} #{pip_name} 2>/dev/null`.match(/#{Regexp.escape(pip_name)} \(([^)]+)\)/)[1]
      rescue NoMethodError
        versions_updated[@pkg.name.to_sym] = 'Not Found.'
      end
    else
      # Get the upstream version.
      upstream_version = get_version(@pkg.name, @pkg.homepage, @pkg.source_url)
    end
    # Some packages don't work with this yet, so gracefully exit now rather than throwing false positives.
    versions_updated[@pkg.name.to_sym] = 'Not Found.' if upstream_version.nil? || upstream_version.to_s.chomp == 'null'

    unless upstream_version.nil?
      versions_updated[@pkg.name.to_sym] = 'Up to date.' if (Libversion.version_compare2(PackageUtils.get_clean_version(@pkg.version), upstream_version) >= 0) && versions_updated[@pkg.name.to_sym] != 'Not Found.'
      if Libversion.version_compare2(PackageUtils.get_clean_version(@pkg.version), upstream_version) == -1
        if UPDATE_PACKAGE_FILES && !@pkg.name[/#{CREW_AUTOMATIC_VERSION_UPDATE_EXCLUSION_REGEX}/] && updatable_pkg[@pkg.name.to_sym] == 'Yes'
          file = File.read(filename)
          if file.sub!(PackageUtils.get_clean_version(@pkg.version), upstream_version.chomp).nil?
            versions_updated[@pkg.name.to_sym] = false
          else
            File.write(filename, file)
            versions_updated[@pkg.name.to_sym] = true
          end

          if @pkg.binary_compression == 'tar.xz' && !@pkg.no_zstd?
            file = File.read(filename)
            if file.sub!("binary_compression 'tar.xz'", "binary_compression 'tar.zst'").nil?
              bc_updated[@pkg.name.to_sym] = false
            else
              File.write(filename, file)
              bc_updated[@pkg.name.to_sym] = true
            end
          end
        end
        versions_updated[@pkg.name.to_sym] = if UPDATE_PACKAGE_FILES && !@pkg.name[/#{CREW_AUTOMATIC_VERSION_UPDATE_EXCLUSION_REGEX}/] && versions_updated[@pkg.name.to_sym]
                                               'Updated.'
                                             else
                                               @pkg.name[/#{CREW_AUTOMATIC_VERSION_UPDATE_EXCLUSION_REGEX}/] ? 'Update manually.' : 'Outdated.'
                                             end
      end
    end
    version_status_string = ''.ljust(status_field_length)
    updatable_string = nil
    case versions_updated[@pkg.name.to_sym]
    when 'Fake'
      version_status_string = 'Fake'.ljust(status_field_length).lightred
      upstream_version = ''
    when 'Not Found.'
      version_status_string = 'Not Found.'.ljust(status_field_length).lightred
      upstream_version = ''
    when 'Outdated.'
      version_status_string = 'Outdated.'.ljust(status_field_length).yellow
    when 'Update manually.'
      version_status_string = 'Update manually.'.ljust(status_field_length).purple
      updatable_string = 'No'.purple
      if @pkg.name[/#{CREW_AUTOMATIC_VERSION_UPDATE_EXCLUSION_REGEX}/]
        exclusion_mapping_idx = CREW_UPDATER_EXCLUDED_PKGS.keys.find_index { |i| i == @pkg.name }
        updatable_pkg[@pkg.name.to_sym] = exclusion_mapping_idx.nil? ? nil : CREW_UPDATER_EXCLUDED_PKGS.values[exclusion_mapping_idx]
      end
    when 'Updated.'
      version_status_string = 'Updated.'.ljust(status_field_length).blue
    when 'Up to date.'
      version_status_string = 'Up to date.'.ljust(status_field_length).lightgreen if VERBOSE
    end
    updatable_string = (updatable_pkg[@pkg.name.to_sym] == 'Yes' ? 'Yes'.lightgreen : 'No'.lightred) if updatable_string.nil?
    cleaned_pkg_version = PackageUtils.get_clean_version(@pkg.version)
    versions.push(package: @pkg.name, update_status: versions_updated[@pkg.name.to_sym], version: cleaned_pkg_version, upstream_version: upstream_version.chomp)

    addendum_string = "#{@pkg.name} cannot be automatically updated: ".red + "#{updatable_pkg[@pkg.name.to_sym]}\n".purple unless updatable_pkg[@pkg.name.to_sym] == 'Yes'
    version_line_string[@pkg.name.to_sym] = "#{@pkg.name.ljust(package_field_length)}#{version_status_string}#{cleaned_pkg_version.ljust(version_field_length)}#{upstream_version.chomp.ljust(version_field_length)}#{updatable_string}\n"
    print version_line_string[@pkg.name.to_sym] unless OUTPUT_JSON
    print addendum_string unless addendum_string.blank? || OUTPUT_JSON

    print "Failed to update version in #{@pkg.name} to #{upstream_version.chomp}".yellow if !OUTPUT_JSON && (versions_updated[@pkg.name.to_sym].to_s == 'false')
    print "Failed to update binary_compression in #{@pkg.name}".yellow if !OUTPUT_JSON && (bc_updated[@pkg.name.to_sym].to_s == 'false')
  end
  puts versions.to_json if OUTPUT_JSON
end