# frozen_string_literal: true

class TemplatesDashboardController < ApplicationController
  load_and_authorize_resource :template_folder, parent: false
  load_and_authorize_resource :template, parent: false

  SHOW_TEMPLATES_FOLDERS_THRESHOLD = 9
  TEMPLATES_PER_PAGE = 12
  FOLDERS_PER_PAGE = 18

  def index
    @template_folders = filter_template_folders(@template_folders)

    @pagy, @template_folders = pagy(
      @template_folders,
      items: FOLDERS_PER_PAGE,
      page: @template_folders.count > SHOW_TEMPLATES_FOLDERS_THRESHOLD ? params[:page] : 1
    )

    if @pagy.count > SHOW_TEMPLATES_FOLDERS_THRESHOLD
      @templates = @templates.none
    else
      @template_folders = @template_folders.reject { |e| e.name == TemplateFolder::DEFAULT_NAME }
      @templates = filter_templates(@templates)

      limit =
        if @template_folders.size < 4
          TEMPLATES_PER_PAGE
        else
          (@template_folders.size < 7 ? 9 : 6)
        end

      @pagy, @templates = pagy(@templates, limit:)
    end
  end

  private

  def filter_template_folders(template_folders)
    rel = template_folders.joins(:active_templates)
                          .order(id: :desc)
                          .distinct

    TemplateFolders.search(rel, params[:q])
  end

  def filter_templates(templates)
    rel = templates.active.preload(:author, :template_accesses).order(id: :desc)

    if params[:q].blank?
      if Docuseal.multitenant? && !current_account.testing?
        rel = rel.where(folder_id: current_account.default_template_folder.id)
      else
        shared_template_ids =
          TemplateSharing.where(account_id: [current_account.id, TemplateSharing::ALL_ID]).select(:template_id)

        rel = rel.where(folder_id: current_account.default_template_folder.id).or(rel.where(id: shared_template_ids))
      end
    end

    Templates.search(rel, params[:q])
  end
end