# frozen_string_literal: true

class Admin::GroupsController < Admin::StaffController
  def create
    guardian.ensure_can_create_group!

    attributes = group_params.to_h.except(:owner_usernames, :usernames)
    group = Group.new(attributes)

    group.membership_request_template = nil unless group_params[:allow_membership_requests]

    if group_params[:owner_usernames].present?
      owner_ids = User.where(username: group_params[:owner_usernames].split(",")).pluck(:id)

      owner_ids.each { |user_id| group.group_users.build(user_id: user_id, owner: true) }
    end

    if group_params[:usernames].present?
      user_ids = User.where(username: group_params[:usernames].split(",")).pluck(:id)
      user_ids -= owner_ids if owner_ids

      user_ids.each { |user_id| group.group_users.build(user_id: user_id) }
    end

    if group.save
      group.restore_user_count!
      render_serialized(group, BasicGroupSerializer)
    else
      render_json_error group
    end
  end

  def destroy
    group = Group.find_by(id: params[:id])
    raise Discourse::NotFound unless group

    if group.automatic
      can_not_modify_automatic
    else
      StaffActionLogger.new(current_user).log_group_deletion(group)

      group.destroy!
      render json: success_json
    end
  end

  def remove_owner
    group = Group.find_by(id: params.require(:id))
    raise Discourse::NotFound unless group

    return can_not_modify_automatic if group.automatic
    guardian.ensure_can_edit_group!(group)

    if params[:user_id].present?
      users = [User.find_by(id: params[:user_id].to_i)]
    elsif usernames = group_params[:usernames].presence
      users = User.where(username: usernames.split(","))
    else
      raise Discourse::InvalidParameters.new(:user_id)
    end

    users.each do |user|
      group.group_users.where(user_id: user.id).update_all(owner: false)
      GroupActionLogger.new(current_user, group).log_remove_user_as_group_owner(user)
    end

    render json: success_json
  end

  def set_primary
    group = Group.find_by(id: params.require(:id))
    raise Discourse::NotFound unless group

    users = User.where(username: group_params[:usernames].split(","))
    users.each { |user| guardian.ensure_can_change_primary_group!(user, group) }
    users.update_all(primary_group_id: params[:primary] == "true" ? group.id : nil)

    render json: success_json
  end

  def automatic_membership_count
    domains = Group.get_valid_email_domains(params.require(:automatic_membership_email_domains))
    group_id = params[:id]
    user_count = 0

    if domains.present?
      if group_id.present?
        group = Group.find_by(id: group_id)
        raise Discourse::NotFound unless group

        return can_not_modify_automatic if group.automatic

        existing_domains = group.automatic_membership_email_domains&.split("|") || []
        domains -= existing_domains
      end

      user_count = Group.automatic_membership_users(domains.join("|")).count
    end

    render json: { user_count: user_count }
  end

  protected

  def can_not_modify_automatic
    render_json_error(I18n.t("groups.errors.can_not_modify_automatic"))
  end

  private

  def group_params
    permitted = %i[
      name
      mentionable_level
      messageable_level
      visibility_level
      members_visibility_level
      automatic_membership_email_domains
      title
      primary_group
      grant_trust_level
      incoming_email
      flair_icon
      flair_upload_id
      flair_bg_color
      flair_color
      bio_raw
      public_admission
      public_exit
      allow_membership_requests
      full_name
      default_notification_level
      membership_request_template
      owner_usernames
      usernames
      publish_read_state
      notify_users
    ]
    custom_fields = DiscoursePluginRegistry.editable_group_custom_fields
    permitted << { custom_fields: custom_fields } if custom_fields.present?

    permitted << { associated_group_ids: [] } if guardian.can_associate_groups?

    permitted = permitted | DiscoursePluginRegistry.group_params

    params.require(:group).permit(permitted)
  end
end