module ForestLiana
  class ResourcesController < ForestLiana::ApplicationController
    include ForestLiana::Ability
    begin
      prepend ResourcesExtensions
    rescue NameError
    end

    rescue_from ActiveRecord::RecordNotFound, :with => :record_not_found

    if Rails::VERSION::MAJOR < 4
      before_filter :find_resource, except: :count
    else
      before_action :find_resource, except: :count
    end

    def index
      action = request.format == 'csv' ? 'export' : 'browse'
      forest_authorize!(action, forest_user, @resource)
      begin
        getter = ForestLiana::ResourcesGetter.new(@resource, params, forest_user)
        getter.perform
        respond_to do |format|
          format.json { render_jsonapi(getter) }
          format.csv { render_csv(getter, @resource) }
        end
      rescue ForestLiana::Errors::LiveQueryError => error
        render json: { errors: [{ status: 422, detail: error.message }] },
          status: :unprocessable_entity, serializer: nil
      rescue ForestLiana::Errors::ExpectedError => error
        error.display_error
        error_data = ForestAdmin::JSONAPI::Serializer.serialize_errors([{
          status: error.error_code,
          detail: error.message
        }])
        render(serializer: nil, json: error_data, status: error.status)
      rescue => error
        FOREST_REPORTER.report error
        FOREST_LOGGER.error "Records Index error: #{error}\n#{format_stacktrace(error)}"
        internal_server_error
      end
    end

    def count
      find_resource
      forest_authorize!('browse', forest_user, @resource)
      begin
        getter = ForestLiana::ResourcesGetter.new(@resource, params, forest_user)
        getter.count

        render serializer: nil, json: { count: getter.records_count }

      rescue ForestLiana::Errors::LiveQueryError => error
        render json: { errors: [{ status: 422, detail: error.message }] },
          status: :unprocessable_entity, serializer: nil
      rescue ForestLiana::Errors::ExpectedError => error
        error.display_error
        error_data = ForestAdmin::JSONAPI::Serializer.serialize_errors([{
          status: error.error_code,
          detail: error.message
        }])
        render(serializer: nil, json: error_data, status: error.status)
      rescue => error
        FOREST_REPORTER.report error
        FOREST_LOGGER.error "Records Index Count error: #{error}\n#{format_stacktrace(error)}"
        internal_server_error
      end
    end

    def show
      forest_authorize!('read', forest_user, @resource)
      begin
        getter = ForestLiana::ResourceGetter.new(@resource, params, forest_user)
        getter.perform

        render serializer: nil, json: render_record_jsonapi(getter.record)
      rescue ActiveRecord::RecordNotFound
        render serializer: nil, json: { status: 404 }, status: :not_found
      rescue => error
        FOREST_REPORTER.report error
        FOREST_LOGGER.error "Record Show error: #{error}\n#{format_stacktrace(error)}"
        internal_server_error
      end
    end

    def create
      forest_authorize!('add', forest_user, @resource)
      begin
        creator = ForestLiana::ResourceCreator.new(@resource, params)
        creator.perform

        if creator.errors
          render serializer: nil, json: ForestAdmin::JSONAPI::Serializer.serialize_errors(
            creator.errors), status: 400
        elsif creator.record.valid?
          render serializer: nil, json: render_record_jsonapi(creator.record)
        else
          render serializer: nil, json: ForestAdmin::JSONAPI::Serializer.serialize_errors(
            creator.record.errors), status: 400
        end
      rescue => error
        FOREST_REPORTER.report error
        FOREST_LOGGER.error "Record Create error: #{error}\n#{format_stacktrace(error)}"
        internal_server_error
      end
    end

    def update
      forest_authorize!('edit', forest_user, @resource)
      begin
        updater = ForestLiana::ResourceUpdater.new(@resource, params, forest_user)
        updater.perform

        if updater.errors
          render serializer: nil, json: ForestAdmin::JSONAPI::Serializer.serialize_errors(
            updater.errors), status: 400
        elsif updater.record.valid?
          render serializer: nil, json: render_record_jsonapi(updater.record)
        else
          render serializer: nil, json: ForestAdmin::JSONAPI::Serializer.serialize_errors(
            updater.record.errors), status: 400
        end
      rescue => error
        FOREST_REPORTER.report error
        FOREST_LOGGER.error "Record Update error: #{error}\n#{format_stacktrace(error)}"
        internal_server_error
      end
    end

    def destroy
      forest_authorize!('delete', forest_user, @resource)
      begin
        collection_name = ForestLiana.name_for(@resource)
        scoped_records = ForestLiana::ScopeManager.apply_scopes_on_records(@resource, forest_user, collection_name, params[:timezone])

        unless scoped_records.exists?(params[:id])
          return render serializer: nil, json: { status: 404 }, status: :not_found
        end

        if scoped_records.destroy(params[:id])
          head :no_content
        else
          restrict_error = ActiveRecord::DeleteRestrictionError.new
          render json: { errors: [{ status: :bad_request, detail: restrict_error.message }] }, status: :bad_request
        end
      rescue => error
        FOREST_REPORTER.report error
        FOREST_LOGGER.error "Record Destroy error: #{error}\n#{format_stacktrace(error)}"
        internal_server_error
      end
    end

    def destroy_bulk
      forest_authorize!('delete', forest_user, @resource)
      begin
        ids = ForestLiana::ResourcesGetter.get_ids_from_request(params, forest_user)
        @resource.transaction do
          ids.each do |id|
            record = @resource.find(id)
            record.destroy!
          end
        end
      rescue ActiveRecord::RecordNotDestroyed => error
        render json: { errors: [{ status: :bad_request, detail: error.message }] }, status: :bad_request
      rescue => error
        FOREST_REPORTER.report error
        FOREST_LOGGER.error "Records Destroy error: #{error}\n#{format_stacktrace(error)}"
        internal_server_error
      end
    end

    private

    def find_resource
      begin
        @resource = SchemaUtils.find_model_from_collection_name(params[:collection])

        if @resource.nil? || !SchemaUtils.model_included?(@resource) ||
          !@resource.ancestors.include?(ActiveRecord::Base)
          render serializer: nil, json: { status: 404 }, status: :not_found
        end
      rescue => error
        FOREST_REPORTER.report error
        FOREST_LOGGER.error "Find Collection error: #{error}\n#{format_stacktrace(error)}"
        render serializer: nil, json: { status: 404 }, status: :not_found
      end
    end

    def includes(getter)
      getter.includes_for_serialization
    end

    def record_includes
      ForestLiana::QueryHelper.get_one_association_names_string(@resource)
    end

    def record_not_found
      head :not_found
    end

    def is_sti_model?
      @is_sti_model ||= (@resource.inheritance_column.present? &&
        @resource.columns.any? { |column| column.name == @resource.inheritance_column })
    end

    def get_record record
      is_sti_model? ? record.becomes(@resource) : record
    end

    def render_record_jsonapi record
      collection = ForestLiana::SchemaHelper.find_collection_from_model(@resource)
      collection_fields = collection.fields.map { |field| field[:field] }
      fields_to_serialize = {
        ForestLiana.name_for(@resource) => collection_fields.join(',')
      }

      serialize_model(get_record(record), {
        include: record_includes,
        fields: fields_to_serialize
      })
    end

    def render_jsonapi getter
      records = getter.records.map { |record| get_record(record) }
      fields_to_serialize = fields_per_model(params[:fields], @resource)

      json = serialize_models(
        records,
        {
          include: includes(getter),
          fields: fields_to_serialize,
          params: params
        },
        getter.search_query_builder.fields_searched
      )

      render serializer: nil, json: json
    end

    def get_collection
      collection_name = ForestLiana.name_for(@resource)
      @collection ||= ForestLiana.apimap.find { |collection| collection.name.to_s == collection_name }
    end

    # NOTICE: Return a formatted object containing the request condition filters and
    #         the user id used by the scope validator class to validate if scope is
    #         in request
    def get_collection_list_permission_info(user, collection_list_request)
      {
        user_id: user['id'],
        filters: collection_list_request[:filters],
        segmentQuery: collection_list_request[:segmentQuery],
      }
    end
  end
end