module SolidusMe

  class MelhorEnvio
    SHIPPING_METHODS = [
      { name: "Correios PAC", carrier: "Correios", service_level: "PAC", external_id: 1 },
      { name: "Correios SEDEX", carrier: "Correios", service_level: "SEDEX", external_id: 2 },
      { name: "Correios Mini Envios", carrier: "Correios", service_level: "Mini Envios", external_id: 17 },
      { name: "Jadlog .Package", carrier: "Jadlog", service_level: ".Package", external_id: 3 },
      { name: "Jadlog .Com", carrier: "Jadlog", service_level: ".Com", external_id: 4 }
    ]

    attr_accessor :package, :shipping_methods
    def initialize(package, shipping_methods)
      @package = package
      @shipping_methods = shipping_methods
    end

    def self.generate_code external_id
      (self.name.underscore + "_#{external_id}").downcase
    end

    def self.install
      SHIPPING_METHODS.each do |provider_method|
        Spree::ShippingMethod.find_or_create_by(code: generate_code(provider_method[:external_id])) do |shipping_method|
          shipping_method.name = provider_method[:name]
          shipping_method.carrier = provider_method[:carrier]
          shipping_method.service_level = provider_method[:service_level]
          shipping_method.code = generate_code(provider_method[:external_id])
          shipping_method.calculator = Spree::Calculator::Shipping::FlatRate.create
          shipping_method.shipping_categories = [Spree::ShippingCategory.first]
          shipping_method.available_to_users = false
          shipping_method.provider_id = SolidusTecEstimator::Provider.find_by(class_name: self.to_s).id
        end
      end
    end

    def shipping_rates
      @me_account = Account.first
      return [] if @me_account.blank?

      @me_account.check_token
      @me_client = MeApi::Client.new(@me_account.access_token)

      melhor_envio_rates = get_rates_from_melhor_envio(package)
      shipping_rates = melhor_envio_rates.map do |melhor_envio_rate|
        build_shipping_rate(melhor_envio_rate, package)
      end.compact

      shipping_rates
    end

    private

    def get_rates_from_melhor_envio(package)
      price = package.contents.map { |content| content.price }.sum
      weight = package.weight

      zipcode = package.order.ship_address.zipcode
      available_shipping_method_codes = @shipping_methods.pluck(:code)

      rates = @me_client.rates(
        from: @me_account.postal_code_from,
        to: zipcode,
        weight_kg: (weight / 1000.00),
        contents_value_brl: price
      )
      rates.select { |rate| rate.price > 0 && available_shipping_method_codes.include?(self.class.generate_code(rate.id)) }
    rescue
      []
    end

    def build_shipping_rate(melhor_envio_rate, package)
      return unless melhor_envio_rate.max_delivery_time
      shipping_method = Spree::ShippingMethod.find_by(code: self.class.generate_code(melhor_envio_rate.id))
      estimate_prose = "Chegará em até #{ActionController::Base.helpers.pluralize(melhor_envio_rate.max_delivery_time, "dia", plural: "dias")} úteis"

      Spree::ShippingRate.new(
        shipment: package.shipment,
        shipping_method: shipping_method,
        cost: melhor_envio_rate.price,
        min_delivery_time: melhor_envio_rate.min_delivery_time.business_days.from_now,
        max_delivery_time: melhor_envio_rate.max_delivery_time.business_days.from_now,
        estimate_prose: estimate_prose,
        expires_in: Time.now + 2.hours
      )
    end

  end

end