package eu.cosmedico.cloud.domain.manufacturer

import eu.cosmedico.cloud.domain.ItemCode
import eu.cosmedico.cloud.domain.billing.{BasicInvoiceItem, InvoiceItem}

/**
 * Created by g.duszynski@cos-medico.eu on 2015-04-16.
 * All rights belong to CM International Ltd.
 */
trait ProfitShare {
  def name:     String
  def itemCode: ItemCode
  def taxRate:  Option[BigDecimal]

  def shareOf(item: InvoiceItem): Option[InvoiceItem]
}

case class NoShare(name: String, itemCode: ItemCode)
  extends ProfitShare {

  def taxRate: Option[BigDecimal] = None

  def shareOf(item: InvoiceItem) = None
}

case class FixedShare(name: String, itemCode: ItemCode, shareAmount: BigDecimal, taxRate: Option[BigDecimal] = None)
  extends ProfitShare {

  def shareOf(item: InvoiceItem) = {
    if(item.code == itemCode){
      Some(BasicInvoiceItem(itemCode, name, None, item.unit, item.quantity, taxRate, shareAmount))
    } else None
  }
}

case class RelativeShare(name: String, itemCode: ItemCode, shareRatio: BigDecimal, taxRate: Option[BigDecimal] = None)
  extends ProfitShare {

  if(shareRatio>1 || shareRatio<=0) throw new IllegalArgumentException("Unit price ratio must be between (0,1>")

  def shareOf(item: InvoiceItem) = {
    if(item.code == itemCode){
      Some(BasicInvoiceItem(itemCode, name, None, item.unit, item.quantity, taxRate, item.unitPrice*shareRatio))
    } else None
  }
}