class Order < ApplicationRecord
  # === Constants ===
  DRAFT_EXPIRY_TIME = 30.minutes
  MAX_PAYMENT_ATTEMPTS = 3

  # === Associations ===
  belongs_to :user
  belongs_to :event
  has_many :tickets, dependent: :destroy

  # === Validations ===
  validates :user_id, presence: true
  validates :event_id, presence: true
  validates :status, presence: true, inclusion: {
    in: %w[draft pending_payment paid completed cancelled expired]
  }
  validates :total_amount_cents, presence: true,
    numericality: { greater_than_or_equal_to: 0 }
  validates :payment_attempts, presence: true,
    numericality: { greater_than_or_equal_to: 0 }

  # === Scopes ===
  scope :draft, -> { where(status: "draft") }
  scope :active, -> { where(status: %w[paid completed]) }
  scope :expired_drafts, -> { draft.where("expires_at < ?", Time.current) }
  scope :can_retry_payment, -> {
    draft.where("payment_attempts < ? AND expires_at > ?",
                MAX_PAYMENT_ATTEMPTS, Time.current)
  }

  before_validation :set_expiry, on: :create

  # === Instance Methods ===

  # Total amount in euros (formatted)
  def total_amount_euros
    total_amount_cents / 100.0
  end

  # Check if order can be retried for payment
  def can_retry_payment?
    draft? && payment_attempts < MAX_PAYMENT_ATTEMPTS && !expired?
  end

  # Check if order is expired
  def expired?
    expires_at.present? && expires_at < Time.current
  end

  # Mark order as expired if it's past expiry time
  def expire_if_overdue!
    return unless draft? && expired?
    update!(status: "expired")
  end

  # Increment payment attempt counter
  def increment_payment_attempt!
    update!(
      payment_attempts: payment_attempts + 1,
      last_payment_attempt_at: Time.current
    )
  end

  # Check if draft is about to expire (within 5 minutes)
  def expiring_soon?
    return false unless draft? && expires_at.present?
    expires_at <= 5.minutes.from_now
  end

  # Mark order as paid and activate all tickets
  def mark_as_paid!
    transaction do
      update!(status: "paid")
      tickets.update_all(status: "active")
    end
  end

  # Calculate total from tickets
  def calculate_total!
    update!(total_amount_cents: tickets.sum(:price_cents))
  end

  private

  def set_expiry
    return unless status == "draft"
    self.expires_at = DRAFT_EXPIRY_TIME.from_now if expires_at.blank?
  end

  def draft?
    status == "draft"
  end
end