# frozen_string_literal: true

module Admin
  class CostsController < Admin::BaseController
    def index
      @month = parse_month(params[:month]) || Time.zone.today.beginning_of_month
      analytics = Admin::CostAnalytics.new(month: @month)
      @summary = analytics.summary
      @trend = analytics.trend
      @clubs = analytics.club_breakdown
      @entries = PlatformCostEntry.for_month(@month).ordered
      @month_options = month_options(@month)
    end

    private

    def parse_month(value)
      return nil if value.blank?

      Date.strptime(value.to_s, "%Y-%m").beginning_of_month
    rescue ArgumentError, TypeError
      nil
    end

    def month_options(selected)
      start = selected - 23.months
      (0..23).map { |i| start + i.months }.reverse
    end
  end
end