# frozen_string_literal: true
module Hyrax
  module Dashboard
    class NestCollectionsController < ApplicationController
      include Blacklight::Base
      class_attribute :form_class, :new_collection_form_class
      self.form_class = Hyrax::Forms::Dashboard::NestCollectionForm
      self.new_collection_form_class = Hyrax::Forms::CollectionForm

      # Add this collection as a subcollection within another existing collection
      def create_relationship_within
        @form = build_within_form
        if @form.save
          notice = I18n.t('create_within', scope: 'hyrax.dashboard.nest_collections_form', child_title: @form.child.title.first, parent_title: @form.parent.title.first)
          redirect_to redirect_path(item: @form.child), notice: notice
        else
          redirect_to redirect_path(item: @form.child), flash: { error: @form.errors.full_messages }
        end
      end

      # create and link a NEW subcollection under this collection, with this collection as parent
      def create_collection_under
        @form = build_create_collection_form
        if @form.validate_add
          redirect_to new_dashboard_collection_path(collection_type_id: @form.parent.collection_type.id, parent_id: @form.parent)
        else
          redirect_to redirect_path(item: @form.parent), flash: { error: @form.errors.full_messages }
        end
      end

      # link this collection as parent by adding existing collection as subcollection under this one
      def create_relationship_under
        @form = build_under_form
        if @form.save
          notice = I18n.t('create_under', scope: 'hyrax.dashboard.nest_collections_form', child_title: @form.child.title.first, parent_title: @form.parent.title.first)
          redirect_to redirect_path(item: @form.parent), notice: notice
        else
          redirect_to redirect_path(item: @form.parent), flash: { error: @form.errors.full_messages }
        end
      end

      # remove a parent collection relationship from this collection
      def remove_relationship_above
        @form = build_remove_form
        if @form.remove
          notice = I18n.t('removed_relationship', scope: 'hyrax.dashboard.nest_collections_form', child_title: @form.child.title.first, parent_title: @form.parent.title.first)
          redirect_to redirect_path(item: @form.child), notice: notice
        else
          redirect_to redirect_path(item: @form.child), flash: { error: @form.errors.full_messages }
        end
      end

      # remove a subcollection relationship from this collection
      def remove_relationship_under
        @form = build_remove_form
        if @form.remove
          notice = I18n.t('removed_relationship', scope: 'hyrax.dashboard.nest_collections_form', child_title: @form.child.title.first, parent_title: @form.parent.title.first)
          redirect_to redirect_path(item: @form.parent), notice: notice
        else
          redirect_to redirect_path(item: @form.parent), flash: { error: @form.errors.full_messages }
        end
      end

      private

      def build_within_form
        child = ::Collection.find(params.fetch(:child_id))
        authorize! :read, child
        parent = params.key?(:parent_id) ? ::Collection.find(params[:parent_id]) : nil
        form_class.new(child: child, parent: parent, context: self)
      end

      def build_under_form
        parent = ::Collection.find(params.fetch(:parent_id))
        authorize! :deposit, parent
        child = params.key?(:child_id) ? ::Collection.find(params[:child_id]) : nil
        form_class.new(child: child, parent: parent, context: self)
      end

      def build_create_collection_form
        parent = ::Collection.find(params.fetch(:parent_id))
        authorize! :deposit, parent
        form_class.new(child: nil, parent: parent, context: self)
      end

      def build_remove_form
        child = ::Collection.find(params.fetch(:child_id))
        parent = ::Collection.find(params.fetch(:parent_id))
        authorize! :edit, parent
        form_class.new(child: child, parent: parent, context: self)
      end

      # determine appropriate redirect location depending on specified source
      def redirect_path(item:)
        return my_collections_path if params[:source] == 'my'
        dashboard_collection_path(item)
      end
    end
  end
end