Refund decision

# title: Refund decision
# category: Vibescript Showcase
# difficulty: Showcase
# summary: Make refund decisions with typed enums, money values, and Duration-based policy windows.
# description: This example keeps policy logic readable by using domain types instead of raw numbers and strings everywhere.
# tags: policies, money, durations, enums
# featured: true
# feature_rank: 4
# vibe: 0.2

enum RefundDecision
  Full
  Partial
  Denied
end

def refund_decision(age: duration, used: bool) -> RefundDecision
  if age <= 7.days && !used
    RefundDecision::Full
  elsif age <= 30.days
    RefundDecision::Partial
  else
    RefundDecision::Denied
  end
end

def refund_amount(total: money, decision: RefundDecision) -> money
  if decision == RefundDecision::Full
    total
  elsif decision == RefundDecision::Partial
    total - money("15.00 USD")
  else
    money("0.00 USD")
  end
end

def refund_quote(total: money, purchased_at: time, requested_at: time, used: bool) -> hash
  age = requested_at - purchased_at
  decision = refund_decision(age, used)

  {
    decision: decision.name,
    age: age.iso8601,
    used: used,
    refund: refund_amount(total, decision)
  }
end

def run
  purchased_at = Time.at(1700000000)
  {
    full: refund_quote(money("89.00 USD"), purchased_at, 3.days.after(purchased_at), false),
    partial: refund_quote(money("89.00 USD"), purchased_at, 14.days.after(purchased_at), true),
    denied: refund_quote(money("89.00 USD"), purchased_at, 45.days.after(purchased_at), true)
  }
end