# frozen_string_literal: true

module Projects
  module Ml
    class ExperimentsController < ::Projects::ApplicationController
      include Projects::Ml::ExperimentsHelper

      before_action :check_feature_flag

      feature_category :mlops

      MAX_EXPERIMENTS_PER_PAGE = 20
      MAX_CANDIDATES_PER_PAGE = 30

      def index
        paginator = ::Ml::Experiment.by_project_id(@project.id)
                                    .with_candidate_count
                                    .keyset_paginate(cursor: params[:cursor], per_page: MAX_EXPERIMENTS_PER_PAGE)

        @experiments = paginator.records
        @page_info = page_info(paginator)
      end

      def show
        @experiment = ::Ml::Experiment.by_project_id_and_iid(@project.id, params[:id])

        return redirect_to project_ml_experiments_path(@project) unless @experiment.present?

        find_params = params
                        .transform_keys(&:underscore)
                        .permit(:name, :order_by, :sort, :order_by_type)

        paginator = CandidateFinder
                        .new(@experiment, find_params)
                        .execute
                        .keyset_paginate(cursor: params[:cursor], per_page: MAX_CANDIDATES_PER_PAGE)

        @candidates = paginator.records.each(&:artifact_lazy)
        @page_info = page_info(paginator)
      end

      private

      def check_feature_flag
        render_404 unless Feature.enabled?(:ml_experiment_tracking, @project)
      end
    end
  end
end