# frozen_string_literal: true

require "lazy_object"
require "value_semantics/monkey_patched"

require_relative "bandwidth_tn_repo"
require_relative "customer"
require_relative "polyfill"

class CustomerRepo
	class NotFound < RuntimeError; end

	value_semantics do
		redis             Anything(), default: LazyObject.new { REDIS }
		db                Anything(), default: LazyObject.new { DB }
		braintree         Anything(), default: LazyObject.new { BRAINTREE }
		sgx_repo          Anything(), default: TrivialBackendSgxRepo.new
		bandwidth_tn_repo Anything(), default: BandwidthTnRepo.new
	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|
				raise NotFound, "No customer" 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)
		@bandwidth_tn_repo.put_lidb_name(customer.registered?.phone, lidb_name)
	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)
		tel = customer.registered?.phone
		@sgx_repo.put_fwd(customer.customer_id, tel, customer_fwd)
	end

protected

	def new_sgx(customer_id)
		TrivialBackendSgxRepo.new.get(customer_id).with(registered?: false)
	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 tndetails(sgx)
		return unless sgx.registered?

		LazyObject.new { @bandwidth_tn_repo.find(sgx.registered?.phone) }
	end

	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, tndetails: tndetails(sgx), **data
			)
		end
	end
end