# frozen_string_literal: true

require "lazy_object"

require_relative "customer"
require_relative "legacy_customer"
require_relative "polyfill"

class CustomerRepo
	class NotFound < RuntimeError; end

	def initialize(
		redis: LazyObject.new { REDIS },
		db: LazyObject.new { DB },
		braintree: LazyObject.new { BRAINTREE },
		sgx_repo: TrivialBackendSgxRepo.new
	)
		@redis = redis
		@db = db
		@braintree = braintree
		@sgx_repo = sgx_repo
	end

	def find(customer_id)
		@redis.get("jmp_customer_jid-#{customer_id}").then do |jid|
			raise NotFound, "No jid" unless jid

			find_inner(customer_id, jid)
		end
	end

	def find_by_jid(jid)
		if jid.to_s =~ /\Acustomer_(.+)@#{CONFIG[:component][:jid]}\Z/
			find($1)
		else
			@redis.get("jmp_customer_id-#{jid}").then do |customer_id|
				next find_legacy_customer(jid) unless customer_id

				find_inner(customer_id, jid)
			end
		end
	end

	def find_by_tel(tel)
		@redis.get("catapult_jid-#{tel}").then do |jid|
			raise NotFound, "No jid" unless jid

			find_by_jid(jid)
		end
	end

	def create(jid)
		@braintree.customer.create.then do |result|
			raise "Braintree customer create failed" unless result.success?

			cid = result.customer.id
			@redis.msetnx(
				"jmp_customer_id-#{jid}", cid, "jmp_customer_jid-#{cid}", jid
			).then do |redis_result|
				raise "Saving new customer to redis failed" unless redis_result == 1

				Customer.new(cid, Blather::JID.new(jid), sgx: new_sgx(cid))
			end
		end
	end

	def put_lidb_name(customer, lidb_name)
		BandwidthIris::Lidb.create(
			customer_order_id: customer.customer_id,
			lidb_tn_groups: { lidb_tn_group: {
				telephone_numbers: [customer.registered?.phone.sub(/\A\+1/, "")],
				subscriber_information: lidb_name,
				use_type: "RESIDENTIAL", visibility: "PUBLIC"
			} }
		)
	end

	def put_transcription_enabled(customer, transcription_enabled)
		@sgx_repo.put_transcription_enabled(
			customer.customer_id, transcription_enabled
		)
	end

	def put_fwd(customer, customer_fwd)
		@sgx_repo.put_fwd(
			customer.customer_id, customer.registered?.phone, customer_fwd
		)
	end

protected

	def new_sgx(customer_id)
		TrivialBackendSgxRepo.new.get(customer_id).with(registered?: false)
	end

	def find_legacy_customer(jid)
		@redis.lindex("catapult_cred-#{jid}", 3).then do |tel|
			raise NotFound, "No customer" unless tel

			LegacyCustomer.new(Blather::JID.new(jid), tel)
		end
	end

	def hydrate_plan(customer_id, raw_customer)
		raw_customer.dup.tap do |data|
			data[:plan] = CustomerPlan.new(
				customer_id,
				plan: data.delete(:plan_name)&.then(&Plan.method(:for)),
				expires_at: data.delete(:expires_at)
			)
		end
	end

	SQL = <<~SQL
		SELECT COALESCE(balance,0) AS balance, plan_name, expires_at
		FROM customer_plans LEFT JOIN balances USING (customer_id)
		WHERE customer_id=$1 LIMIT 1
	SQL

	def find_inner(customer_id, jid)
		result = @db.query_defer(SQL, [customer_id])
		EMPromise.all([@sgx_repo.get(customer_id), result]).then do |(sgx, rows)|
			data = hydrate_plan(
				customer_id,
				rows.first&.transform_keys(&:to_sym) || {}
			)
			Customer.new(customer_id, Blather::JID.new(jid), sgx: sgx, **data)
		end
	end
end