# frozen_string_literal: true

require 'payment/service'
require 'pay_zen/charge'
require 'pay_zen/order'
require 'pay_zen/item'

# PayZen payement gateway
module PayZen; end

## create remote objects on PayZen
class PayZen::Service < Payment::Service
  def create_subscription(payment_schedule, order_id)
    first_item = payment_schedule.ordered_items.first

    order = PayZen::Order.new.get(order_id, operation_type: 'VERIFICATION')
    client = PayZen::Charge.new
    token_id = order['answer']['transactions'].first['paymentMethodToken']

    params = {
      amount: payzen_amount(first_item.details['recurring'].to_i),
      effect_date: first_item.due_date.iso8601,
      payment_method_token: token_id,
      rrule: rrule(payment_schedule),
      order_id: order_id
    }
    unless first_item.details['adjustment']&.zero? && first_item.details['other_items']&.zero?
      params[:initial_amount] = payzen_amount(first_item.amount)
      params[:initial_amount_number] = 1
    end
    pz_subscription = client.create_subscription(params)

    # save payment token
    pgo_tok = PaymentGatewayObject.new(
      gateway_object_id: token_id,
      gateway_object_type: 'PayZen::Token',
      item: payment_schedule
    )
    pgo_tok.save!

    # save payzen subscription
    pgo_sub = PaymentGatewayObject.new(
      gateway_object_id: pz_subscription['answer']['subscriptionId'],
      gateway_object_type: 'PayZen::Subscription',
      item: payment_schedule,
      payment_gateway_object_id: pgo_tok.id
    )
    pgo_sub.save!
  end

  def process_payment_schedule_item(payment_schedule_item)
    pz_order = payment_schedule_item.payment_schedule.gateway_order.retrieve
    transaction = pz_order['answer']['transactions'].last
    return unless transaction_matches?(transaction, payment_schedule_item)

    if transaction['status'] == 'PAID'
      PaymentScheduleService.new.generate_invoice(payment_schedule_item,
                                                  payment_method: 'card',
                                                  payment_id: transaction['uuid'],
                                                  payment_type: 'PayZen::Transaction')
      payment_schedule_item.update_attributes(state: 'paid', payment_method: 'card')
      pgo = PaymentGatewayObject.find_or_initialize_by(item: payment_schedule_item)
      pgo.gateway_object = PayZen::Item.new('PayZen::Transaction', transaction['uuid'])
      pgo.save!
    elsif transaction['status'] == 'RUNNING'
      if payment_schedule_item.state == 'new'
        # notify only for new deadlines, to prevent spamming
        NotificationCenter.call type: 'notify_admin_payment_schedule_failed',
                                receiver: User.admins_and_managers,
                                attached_object: payment_schedule_item
        NotificationCenter.call type: 'notify_member_payment_schedule_failed',
                                receiver: payment_schedule_item.payment_schedule.user,
                                attached_object: payment_schedule_item
      end
      payment_schedule_item.update_attributes(state: transaction['detailedStatus'])
      pgo = PaymentGatewayObject.find_or_initialize_by(item: payment_schedule_item)
      pgo.gateway_object = PayZen::Item.new('PayZen::Transaction', transaction['uuid'])
      pgo.save!
    else
      payment_schedule_item.update_attributes(state: 'error')
    end
  end

  def payzen_amount(amount)
    currency = Setting.get('payzen_currency')
    return amount / 100 if zero_decimal_currencies.any? { |s| s.casecmp(currency).zero? }
    return amount * 10 if three_decimal_currencies.any? { |s| s.casecmp(currency).zero? }

    amount
  end

  private

  def rrule(payment_schedule)
    count = payment_schedule.payment_schedule_items.count
    "RRULE:FREQ=MONTHLY;COUNT=#{count}"
  end

  # check if the given transaction matches the given PaymentScheduleItem
  def transaction_matches?(transaction, payment_schedule_item)
    transaction_date = DateTime.parse(transaction['creationDate']).to_date

    transaction['amount'] == payment_schedule_item.amount &&
      transaction_date >= payment_schedule_item.due_date.to_date &&
      transaction_date <= payment_schedule_item.due_date.to_date + 7.days
  end

  # @see https://payzen.io/en-EN/payment-file/ips/list-of-supported-currencies.html
  def zero_decimal_currencies
    %w[KHR JPY KRW XOF XPF]
  end

  def three_decimal_currencies
    %w[KWD TND]
  end
end