module Billing
  module Stripe
    class PriceCatalog
      INTERVALS = %w[monthly yearly].freeze
      DEFAULT_INTERVAL = "yearly"

      PRICING = {
        "premium_light" => { "yearly" => "€39,90/anno", "monthly" => "€4,90/mese" },
        "premium_full" => { "yearly" => "€69,90/anno", "monthly" => "€9,90/mese" }
      }.freeze

      class << self
        def normalize_interval(value)
          interval = value.to_s.presence || DEFAULT_INTERVAL
          raise ArgumentError, "Intervallo non valido" unless INTERVALS.include?(interval)

          interval
        end

        def price_id(plan_slug:, interval:)
          interval = normalize_interval(interval)
          id = price_id_for(plan_slug.to_s, interval)
          raise "Price ID Stripe mancante per #{plan_slug} (#{interval})" if id.blank?

          id
        end

        def configured?(plan_slug:, interval:)
          price_id_for(plan_slug.to_s, normalize_interval(interval)).present?
        end

        def label(plan_slug:, interval:)
          PRICING.dig(plan_slug.to_s, normalize_interval(interval)) || normalize_interval(interval)
        end

        def available_intervals(plan_slug:)
          INTERVALS.select { |interval| configured?(plan_slug: plan_slug, interval: interval) }
        end

        def infer_from_price_id(price_id)
          return nil if price_id.blank?

          {
            MatchLiveTv.stripe_premium_light_monthly_price_id => %w[premium_light monthly],
            MatchLiveTv.stripe_premium_light_yearly_price_id => %w[premium_light yearly],
            MatchLiveTv.stripe_premium_full_monthly_price_id => %w[premium_full monthly],
            MatchLiveTv.stripe_premium_full_yearly_price_id => %w[premium_full yearly]
          }.each do |configured_id, pair|
            return pair if configured_id.present? && configured_id == price_id
          end

          nil
        end

        private

        def price_id_for(plan_slug, interval)
          case [plan_slug, interval]
          when %w[premium_light monthly]
            MatchLiveTv.stripe_premium_light_monthly_price_id
          when %w[premium_light yearly]
            MatchLiveTv.stripe_premium_light_yearly_price_id
          when %w[premium_full monthly]
            MatchLiveTv.stripe_premium_full_monthly_price_id
          when %w[premium_full yearly]
            MatchLiveTv.stripe_premium_full_yearly_price_id
          else
            nil
          end
        end
      end
    end
  end
end