module Comee
  module Core
    class QuotationRequestService
      def create_request_with_items(params)
        request = nil
        QuotationRequest.transaction do
          request = QuotationRequest.create!(client_id: params[:client_id], status: QuotationRequest.statuses[:draft])
          items = params[:items]
          items.each do |item|
            item[:price] = 0
            item[:quotation_request_id] = request.id
            item[:discount] = 0
          end
          QuotationRequestItem.insert_all!(items)
        end
        request
      rescue StandardError
        raise
      end

      def submit(id)
        rfq = QuotationRequest.find(id)

        raise(StandardError, "RFQ should be in draft state.") if QuotationRequest.statuses[rfq.status] != QuotationRequest.statuses[:draft]

        raise(StandardError, "RFQ does not have any items.") if rfq.quotation_request_items.count.zero?

        raise(StandardError, "RFQ contains only canceled items.") if rfq.quotation_request_items.all?(&:canceled?)

        QuotationRequest.transaction do
          product_ids = rfq.quotation_request_items.map(&:product_id)
          prices = MasterPrice.where(product_id: product_ids).each_with_object({}) do |price, res|
            res[price.product_id] = [price.selling_price, price.valid_from, price.valid_to]
          end
          items = rfq.quotation_request_items.each_with_object({}) do |item, res|
            price = prices[item.product_id]
            res[item.id] = {price: price[0], valid_from: price[1], valid_to: price[2]} if price
          end
          QuotationRequestItem.update!(items.keys, items.values)
          rfq.status = QuotationRequest.statuses[:submitted]
          rfq.save!
        end
        rfq
      end

      def submit_for_confirmation(id)
        rfq = QuotationRequest.find(id)
        if QuotationRequest.statuses[rfq.status] != QuotationRequest.statuses[:submitted]
          raise(StandardError, "RFQ should be in submitted state.")
        end

        rfq.status = QuotationRequest.statuses[:awaiting_confirmation]
        rfq.save!
        rfq
      end

      def confirm(id)
        rfq = QuotationRequest.find(id)
        if QuotationRequest.statuses[rfq.status] != QuotationRequest.statuses[:awaiting_confirmation]
          raise(StandardError, "RFQ should be in awaiting_confirmation state.")
        end

        rfq.status = QuotationRequest.statuses[:confirmed]
        rfq.save!
        rfq
      end
    end
  end
end