# frozen_string_literal: true
require "json"

CHANNELS = %w[email sms push].freeze

def handler
  # В реальности: читаем body запроса, определяем канал и шлём уведомление
  # Здесь: симуляция отправки по всем каналам

  order_id  = "ORD-DEMO"
  user_name = "Alice"
  amount    = 129.99

  results = CHANNELS.map do |ch|
    # Симуляция: email — всегда ок, sms — 95%, push — 90%
    success = case ch
              when "email" then true
              when "sms"   then rand(100) < 95
              when "push"  then rand(100) < 90
              end
    {
      channel: ch,
      status:  success ? "sent" : "failed",
      message: "Order #{order_id} confirmed — total $#{amount}",
      recipient: "#{user_name.downcase}@notify",
    }
  end

  sent  = results.count { |r| r[:status] == "sent" }
  total = results.length

  {
    status:    "ok",
    order_id:  order_id,
    sent:      sent,
    failed:    total - sent,
    channels:  results,
    sent_at:   Time.now.utc.strftime("%Y-%m-%dT%H:%M:%SZ"),
  }.to_json
end