# frozen_string_literal: true

require "value_semantics/monkey_patched"

class CDR
	module Disposition
		def self.===(other)
			["NO ANSWER", "ANSWERED", "BUSY", "FAILED", "VOICEMAIL"].include?(other)
		end

		CAUSES = {
			timeout: "NO ANSWER",
			rejected: "NO ANSWER",
			cancel: "NO ANSWER",
			hangup: "ANSWERED",
			busy: "BUSY"
		}.freeze

		def self.for(cause, tag)
			return tag if tag == "VOICEMAIL"

			CAUSES.fetch(cause.to_sym, "FAILED")
		end
	end

	value_semantics do
		cdr_id String
		customer_id String
		start Time
		billsec Integer
		disposition Disposition
		tel(/\A\+\d+\Z/)
		direction Either(:inbound, :outbound)
	end

	def self.for(event, **kwargs)
		start = Time.parse(event["startTime"])

		new({
			cdr_id: "sgx-jmp/#{event['callId']}",
			start: start,
			billsec: (Time.parse(event["endTime"]) - start).ceil,
			disposition: Disposition.for(event["cause"], event["tag"])
		}.merge(kwargs))
	end

	def self.for_inbound(customer_id, event)
		self.for(
			event,
			customer_id: customer_id,
			tel: event["from"],
			direction: :inbound
		)
	end

	def self.for_outbound(event)
		self.for(
			event,
			customer_id: event["from"].sub(/^\+/, ""),
			tel: event["to"],
			direction: :outbound
		)
	end

	def save
		columns, values = to_h.to_a.transpose
		DB.query_defer(<<~SQL, values)
			INSERT INTO cdr (#{columns.join(',')})
			VALUES ($1, $2, $3, $4, $5, $6, $7)
		SQL
	end
end