module ExpenseGun
  class ExpenseLine < ActiveRecord::Base
    belongs_to :expense
    belongs_to :category
    
    def initialize(h = {})
      super({company_part: 100}.merge(h))
    end
    
    validates :expense,         presence: true
    validates :name,            presence: true
    validates :date,            presence: true
    validates :category,        presence: true
    validates :total_all_taxes, presence: true, numericality: {greater_than_or_equal_to: 1.0}
    validates :vat,             presence: true, numericality: {greater_than_or_equal_to: 1.0}
    validates :company_part,    presence: true, numericality: {greater_than_or_equal_to: 1.0, less_than_or_equal_to: 100.0}
    
    def employee_payback
      (total_all_taxes * company_part / 100)
    end
    
    def total_vat_deductible
      category.vat_deductible == true ? vat : 0.0
    end
  end
end