# frozen_string_literal: true

module API
  module DebianPackageEndpoints
    extend ActiveSupport::Concern

    DISTRIBUTION_REGEX = %r{[a-zA-Z0-9][a-zA-Z0-9.-]*}.freeze
    COMPONENT_REGEX = %r{[a-z-]+}.freeze
    ARCHITECTURE_REGEX = %r{[a-z][a-z0-9]*}.freeze
    LETTER_REGEX = %r{(lib)?[a-z0-9]}.freeze
    PACKAGE_REGEX = API::NO_SLASH_URL_PART_REGEX
    DISTRIBUTION_REQUIREMENTS = {
      distribution: DISTRIBUTION_REGEX
    }.freeze
    COMPONENT_ARCHITECTURE_REQUIREMENTS = {
      component: COMPONENT_REGEX,
      architecture: ARCHITECTURE_REGEX
    }.freeze
    COMPONENT_LETTER_SOURCE_PACKAGE_REQUIREMENTS = {
      component: COMPONENT_REGEX,
      letter: LETTER_REGEX,
      source_package: PACKAGE_REGEX
    }.freeze
    FILE_NAME_REQUIREMENTS = {
      file_name: API::NO_SLASH_URL_PART_REGEX
    }.freeze

    included do
      helpers ::API::Helpers::PackagesHelpers
      helpers ::API::Helpers::Packages::BasicAuthHelpers

      format :txt

      rescue_from ArgumentError do |e|
        render_api_error!(e.message, 400)
      end

      rescue_from ActiveRecord::RecordInvalid do |e|
        render_api_error!(e.message, 400)
      end

      before do
        require_packages_enabled!
      end

      params do
        requires :distribution, type: String, desc: 'The Debian Codename', regexp: Gitlab::Regex.debian_distribution_regex
      end

      namespace 'dists/*distribution', requirements: DISTRIBUTION_REQUIREMENTS do
        # GET {projects|groups}/:id/-/packages/debian/dists/*distribution/Release.gpg
        desc 'The Release file signature' do
          detail 'This feature was introduced in GitLab 13.5'
        end

        route_setting :authentication, deploy_token_allowed: true, basic_auth_personal_access_token: true, job_token_allowed: :basic_auth
        get 'Release.gpg' do
          not_found!
        end

        # GET {projects|groups}/:id/-/packages/debian/dists/*distribution/Release
        desc 'The unsigned Release file' do
          detail 'This feature was introduced in GitLab 13.5'
        end

        route_setting :authentication, deploy_token_allowed: true, basic_auth_personal_access_token: true, job_token_allowed: :basic_auth
        get 'Release' do
          # https://gitlab.com/gitlab-org/gitlab/-/issues/5835#note_414103286
          'TODO Release'
        end

        # GET {projects|groups}/:id/-/packages/debian/dists/*distribution/InRelease
        desc 'The signed Release file' do
          detail 'This feature was introduced in GitLab 13.5'
        end

        route_setting :authentication, deploy_token_allowed: true, basic_auth_personal_access_token: true, job_token_allowed: :basic_auth
        get 'InRelease' do
          not_found!
        end

        params do
          requires :component, type: String, desc: 'The Debian Component', regexp: Gitlab::Regex.debian_component_regex
          requires :architecture, type: String, desc: 'The Debian Architecture', regexp: Gitlab::Regex.debian_architecture_regex
        end

        namespace ':component/binary-:architecture', requirements: COMPONENT_ARCHITECTURE_REQUIREMENTS do
          # GET {projects|groups}/:id/-/packages/debian/dists/*distribution/:component/binary-:architecture/Packages
          desc 'The binary files index' do
            detail 'This feature was introduced in GitLab 13.5'
          end

          route_setting :authentication, deploy_token_allowed: true, basic_auth_personal_access_token: true, job_token_allowed: :basic_auth
          get 'Packages' do
            # https://gitlab.com/gitlab-org/gitlab/-/issues/5835#note_414103286
            'TODO Packages'
          end
        end
      end

      params do
        requires :component, type: String, desc: 'The Debian Component', regexp: Gitlab::Regex.debian_component_regex
        requires :letter, type: String, desc: 'The Debian Classification (first-letter or lib-first-letter)'
        requires :source_package, type: String, desc: 'The Debian Source Package Name', regexp: Gitlab::Regex.debian_package_name_regex
      end

      namespace 'pool/:component/:letter/:source_package', requirements: COMPONENT_LETTER_SOURCE_PACKAGE_REQUIREMENTS do
        # GET {projects|groups}/:id/-/packages/debian/pool/:component/:letter/:source_package/:file_name
        params do
          requires :file_name, type: String, desc: 'The Debian File Name'
        end
        desc 'The package' do
          detail 'This feature was introduced in GitLab 13.5'
        end

        route_setting :authentication, deploy_token_allowed: true, basic_auth_personal_access_token: true, job_token_allowed: :basic_auth
        get ':file_name', requirements: FILE_NAME_REQUIREMENTS do
          # https://gitlab.com/gitlab-org/gitlab/-/issues/5835#note_414103286
          'TODO File'
        end
      end
    end
  end
end