# frozen_string_literal: true

class DashboardController < Dashboard::ApplicationController
  include IssuableCollectionsAction
  include FiltersEvents
  include HomepageData
  include ::Gitlab::InternalEventsTracking

  prepend_before_action(only: [:issues, :work_items]) { authenticate_sessionless_user!(:rss) }
  prepend_before_action(only: [:issues_calendar, :work_items_calendar]) { authenticate_sessionless_user!(:ics) }

  before_action :event_filter, only: :activity
  before_action :projects, only: [:issues, :merge_requests, :search_merge_requests, :work_items, :work_items_calendar]
  before_action :set_show_full_reference,
    only: [:issues, :merge_requests, :search_merge_requests, :work_items, :work_items_calendar]

  before_action only: [:issues] do
    redirect_to_work_items_dashboard if current_user&.work_items_consolidated_list_enabled?
  end

  before_action only: [:issues_calendar] do
    redirect_to_work_items_dashboard(format: :ics) if current_user&.work_items_consolidated_list_enabled?
  end

  before_action :check_filters_presence!, only: [:issues, :merge_requests, :search_merge_requests, :work_items]

  before_action only: [:merge_requests] do
    if request.query_string.present?
      redirect_to merge_requests_search_dashboard_path(params: request.query_parameters), status: :moved_permanently
    end
  end

  before_action only: [:activity] do
    push_frontend_feature_flag(:global_time_tracking_report)
  end

  respond_to :html

  feature_category :notifications, [:home]
  feature_category :user_profile, [:activity]
  feature_category :team_planning, [:issues, :issues_calendar]
  feature_category :portfolio_management, [:work_items, :work_items_calendar]
  feature_category :code_review_workflow, [:merge_requests, :search_merge_requests]

  urgency :low, [:merge_requests, :activity, :search_merge_requests]
  urgency :low, [:issues, :issues_calendar, :work_items, :work_items_calendar]

  def home
    if Feature.enabled?(:personal_homepage, current_user)
      track_internal_event('user_views_homepage', user: current_user)
      @homepage_app_data = homepage_app_data(current_user)
      render('root/index')
    else
      not_found
    end
  end

  def activity
    respond_to do |format|
      format.html

      format.json do
        load_events
        pager_json('events/_events', @events.count { |event| event.visible_to_user?(current_user) })
      end
    end
  end

  def search_merge_requests
    render_merge_requests
  end

  protected

  def load_events
    @events =
      case params[:filter]
      when "your_projects", "projects", "starred"
        load_project_events
      when "followed"
        load_user_events(current_user.followees)
      else
        load_user_events(current_user)
      end

    Events::RenderService.new(current_user).execute(@events)
  end

  def load_user_events(user)
    UserRecentEventsFinder.new(current_user, user, event_filter, params).execute
  end

  def load_project_events
    projects =
      if params[:filter] == "starred"
        ProjectsFinder.new(current_user: current_user, params: { starred: true }).execute
      else
        current_user.authorized_projects
      end

    finder_params = { filter: event_filter }
    finder_params[:offset] = [params[:offset].to_i, 0].max

    if params[:limit].present?
      limit = params[:limit].to_i
      finder_params[:limit] = limit if limit > 0
    end

    EventCollection
      .new(projects, **finder_params)
      .to_a
      .map(&:present)
  end

  def set_show_full_reference
    @show_full_reference = true
  end

  def check_filters_presence!
    no_scalar_filters_set = finder_type.scalar_params.none? { |k| params[k].present? }
    no_array_filters_set = finder_type.array_params.none? { |k, _| params[k].present? }

    # The `in` param is a modifier of `search`. If it's present while the `search`
    # param isn't, the finder won't use the `in` param. We consider this as a no
    # filter scenario.
    no_search_filter_set = params[:in].present? && params[:search].blank?

    @no_filters_set = (no_scalar_filters_set && no_array_filters_set) || no_search_filter_set

    return unless @no_filters_set

    # Call to set selected `state` and `sort` options in view
    finder_options

    respond_to do |format|
      format.html { render(action_name == 'work_items' ? :issues : action_name) }
      format.atom { head :bad_request }
    end
  end

  def redirect_to_work_items_dashboard(format: nil)
    format ||= request.format.symbol unless request.format.html?
    params = request.query_parameters

    if format
      redirect_to work_items_dashboard_path(format, params), status: :moved_permanently
    else
      redirect_to work_items_dashboard_path(params), status: :moved_permanently
    end
  end
end

DashboardController.prepend_mod_with('DashboardController')