class Payment < ActiveRecord::Base
  has_many :ticket_purchases
  belongs_to :user
  belongs_to :conference

  attr_accessor :stripeEmail
  attr_accessor :stripeToken

  validates :last4, presence: true
  validates :authorization_code, presence: true
  validates :status, presence: true
  validates :amount, presence: true, numericality: { greater_than: 0 }
  validates :user_id, presence: true
  validates :conference_id, presence: true

  enum status: {
    unpaid: 0,
    success: 1,
    failure: 2
  }

  def amount_to_pay
    Ticket.total_price(conference, user, paid: false).cents
  end

  def purchase
    customer = Stripe::Customer.create email: stripeEmail,
                                       source: stripeToken,
                                       description: user.name

    gateway_response = Stripe::Charge.create customer: customer.id,
                                             receipt_email: stripeEmail,
                                             description: 'ticket purchases',
                                             amount: amount_to_pay,
                                             currency: conference.tickets.first.price_currency

    self.amount = gateway_response[:amount]
    self.last4 = gateway_response[:source][:last4]
    self.authorization_code = gateway_response[:id]
    self.status = 'success'
    true

  rescue Stripe::CardError => e
    flash[:error] = e.message
    false
  end
end