# frozen_string_literal: true

module Resolvers
  module Issues
    # rubocop:disable Graphql/ResolverType
    class BaseResolver < Resolvers::BaseResolver
      include SearchArguments

      argument :assignee_id, GraphQL::Types::String,
               required: false,
               description: 'ID of a user assigned to the issues. Wildcard values "NONE" and "ANY" are supported.'
      argument :assignee_username, GraphQL::Types::String,
               required: false,
               description: 'Username of a user assigned to the issue.',
               deprecated: { reason: 'Use `assigneeUsernames`', milestone: '13.11' }
      argument :assignee_usernames, [GraphQL::Types::String],
               required: false,
               description: 'Usernames of users assigned to the issue.'
      argument :author_username, GraphQL::Types::String,
               required: false,
               description: 'Username of the author of the issue.'
      argument :closed_after, Types::TimeType,
               required: false,
               description: 'Issues closed after this date.'
      argument :closed_before, Types::TimeType,
               required: false,
               description: 'Issues closed before this date.'
      argument :confidential,
               GraphQL::Types::Boolean,
               required: false,
               description: 'Filter for confidential issues. If "false", excludes confidential issues.' \
                            ' If "true", returns only confidential issues.'
      argument :created_after, Types::TimeType,
               required: false,
               description: 'Issues created after this date.'
      argument :created_before, Types::TimeType,
               required: false,
               description: 'Issues created before this date.'
      argument :crm_contact_id, GraphQL::Types::String,
               required: false,
               description: 'ID of a contact assigned to the issues.'
      argument :crm_organization_id, GraphQL::Types::String,
               required: false,
               description: 'ID of an organization assigned to the issues.'
      argument :iid, GraphQL::Types::String,
               required: false,
               description: 'IID of the issue. For example, "1".'
      argument :iids, [GraphQL::Types::String],
               required: false,
               description: 'List of IIDs of issues. For example, `["1", "2"]`.'
      argument :label_name, [GraphQL::Types::String, { null: true }],
               required: false,
               description: 'Labels applied to this issue.'
      argument :milestone_title, [GraphQL::Types::String, { null: true }],
               required: false,
               description: 'Milestone applied to this issue.'
      argument :milestone_wildcard_id, ::Types::MilestoneWildcardIdEnum,
               required: false,
               description: 'Filter issues by milestone ID wildcard.'
      argument :my_reaction_emoji, GraphQL::Types::String,
               required: false,
               description: 'Filter by reaction emoji applied by the current user.' \
                            ' Wildcard values "NONE" and "ANY" are supported.'
      argument :not, Types::Issues::NegatedIssueFilterInputType,
               description: 'Negated arguments.',
               required: false
      argument :or, Types::Issues::UnionedIssueFilterInputType,
               description: 'List of arguments with inclusive OR.',
               required: false
      argument :types, [Types::IssueTypeEnum],
               as: :issue_types,
               description: 'Filter issues by the given issue types.',
               required: false
      argument :updated_after, Types::TimeType,
               required: false,
               description: 'Issues updated after this date.'
      argument :updated_before, Types::TimeType,
               required: false,
               description: 'Issues updated before this date.'

      class << self
        def resolver_complexity(args, child_complexity:)
          complexity = super
          complexity += 2 if args[:labelName]

          complexity
        end

        def accept_release_tag
          argument :release_tag, [GraphQL::Types::String],
                   required: false,
                   description: "Release tag associated with the issue's milestone."
          argument :release_tag_wildcard_id, Types::ReleaseTagWildcardIdEnum,
                   required: false,
                   description: 'Filter issues by release tag ID wildcard.'
        end
      end

      def ready?(**args)
        if args[:or].present? && or_issuable_queries_disabled?
          raise ::Gitlab::Graphql::Errors::ArgumentError,
            "'or' arguments are only allowed when the `or_issuable_queries` feature flag is enabled."
        end

        args[:not] = args[:not].to_h if args[:not]
        args[:or] = args[:or].to_h if args[:or]

        params_not_mutually_exclusive(args, mutually_exclusive_assignee_username_args)
        params_not_mutually_exclusive(args, mutually_exclusive_milestone_args)
        params_not_mutually_exclusive(args.fetch(:not, {}), mutually_exclusive_milestone_args)
        params_not_mutually_exclusive(args, mutually_exclusive_release_tag_args)

        super
      end

      private

      def or_issuable_queries_disabled?
        if respond_to?(:resource_parent, true)
          ::Feature.disabled?(:or_issuable_queries, resource_parent)
        else
          ::Feature.disabled?(:or_issuable_queries)
        end
      end

      def prepare_finder_params(args)
        params = super(args)
        params[:not] = params[:not].to_h if params[:not]
        params[:or] = params[:or].to_h if params[:or]
        params[:iids] ||= [params.delete(:iid)].compact if params[:iid]

        rewrite_param_name(params[:or], :author_usernames, :author_username)
        rewrite_param_name(params[:or], :label_names, :label_name)
        prepare_assignee_username_params(params)
        prepare_release_tag_params(params)

        params
      end

      def prepare_release_tag_params(args)
        release_tag_wildcard = args.delete(:release_tag_wildcard_id)
        return if release_tag_wildcard.blank?

        args[:release_tag] ||= release_tag_wildcard
      end

      def prepare_assignee_username_params(args)
        rewrite_param_name(args, :assignee_usernames, :assignee_username)
        rewrite_param_name(args[:or], :assignee_usernames, :assignee_username)
        rewrite_param_name(args[:not], :assignee_usernames, :assignee_username)
      end

      def rewrite_param_name(params, old_name, new_name)
        params[new_name] = params.delete(old_name) if params && params[old_name].present?
      end

      def mutually_exclusive_release_tag_args
        [:release_tag, :release_tag_wildcard_id]
      end

      def mutually_exclusive_milestone_args
        [:milestone_title, :milestone_wildcard_id]
      end

      def mutually_exclusive_assignee_username_args
        [:assignee_usernames, :assignee_username]
      end

      def params_not_mutually_exclusive(args, mutually_exclusive_args)
        return unless args.slice(*mutually_exclusive_args).compact.size > 1

        arg_str = mutually_exclusive_args.map { |x| x.to_s.camelize(:lower) }.join(', ')
        raise ::Gitlab::Graphql::Errors::ArgumentError,
          "only one of [#{arg_str}] arguments is allowed at the same time."
      end
    end
    # rubocop:enable Graphql/ResolverType
  end
end

Resolvers::Issues::BaseResolver.prepend_mod
