# frozen_string_literal: true
require_relative 'helper'

class TestRedisConnection < Sidekiq::Test

  describe ".create" do

    # To support both redis-rb 3.3.x #client and 4.0.x #_client
    def client_for(redis)
      if redis.respond_to?(:_client)
        redis._client
      else
        redis.client
      end
    end

    it "creates a pooled redis connection" do
      pool = Sidekiq::RedisConnection.create
      assert_equal Redis, pool.checkout.class
      assert_equal "Sidekiq-server-PID-#{$$}", pool.checkout.connection.fetch(:id)
    end

    # Readers for these ivars should be available in the next release of
    # `connection_pool`, until then we need to reach into the internal state to
    # verify the setting.
    describe "size" do
      def client_connection(*args)
        Sidekiq.stub(:server?, nil) do
          Sidekiq::RedisConnection.create(*args)
        end
      end

      def server_connection(*args)
        Sidekiq.stub(:server?, "constant") do
          Sidekiq::RedisConnection.create(*args)
        end
      end

      it "uses the specified custom pool size" do
        pool = client_connection(size: 42)
        assert_equal 42, pool.instance_eval{ @size }
        assert_equal 42, pool.instance_eval{ @available.length }

        pool = server_connection(size: 42)
        assert_equal 42, pool.instance_eval{ @size }
        assert_equal 42, pool.instance_eval{ @available.length }
      end

      it "defaults server pool sizes based on concurrency with padding" do
        _expected_padding = 5
        Sidekiq.options[:concurrency] = 6
        pool = server_connection

        assert_equal 11, pool.instance_eval{ @size }
        assert_equal 11, pool.instance_eval{ @available.length }
      end

      it "defaults client pool sizes to 5" do
        pool = client_connection

        assert_equal 5, pool.instance_eval{ @size }
        assert_equal 5, pool.instance_eval{ @available.length }
      end

      it "changes client pool sizes with ENV" do
        begin
          ENV['RAILS_MAX_THREADS'] = '9'
          pool = client_connection

          assert_equal 9, pool.instance_eval{ @size }
          assert_equal 9, pool.instance_eval{ @available.length }
        ensure
          ENV.delete('RAILS_MAX_THREADS')
        end
      end
    end

    it "disables client setname with nil id" do
      pool = Sidekiq::RedisConnection.create(:id => nil)
      assert_equal Redis, pool.checkout.class
      assert_equal "redis://127.0.0.1:6379/0", pool.checkout.connection.fetch(:id)
    end

    describe "network_timeout" do
      it "sets a custom network_timeout if specified" do
        pool = Sidekiq::RedisConnection.create(:network_timeout => 8)
        redis = pool.checkout

        assert_equal 8, client_for(redis).timeout
      end

      it "uses the default network_timeout if none specified" do
        pool = Sidekiq::RedisConnection.create
        redis = pool.checkout

        assert_equal 5, client_for(redis).timeout
      end
    end

    describe "namespace" do
      it "uses a given :namespace set by a symbol key" do
        pool = Sidekiq::RedisConnection.create(:namespace => "xxx")
        assert_equal "xxx", pool.checkout.namespace
      end

      it "uses a given :namespace set by a string key" do
        pool = Sidekiq::RedisConnection.create("namespace" => "xxx")
        assert_equal "xxx", pool.checkout.namespace
      end

      it "uses given :namespace over :namespace from Sidekiq.options" do
        Sidekiq.options[:namespace] = "xxx"
        pool = Sidekiq::RedisConnection.create(:namespace => "yyy")
        assert_equal "yyy", pool.checkout.namespace
      end
    end

    describe "socket path" do
      it "uses a given :path" do
        pool = Sidekiq::RedisConnection.create(:path => "/var/run/redis.sock")
        assert_equal "unix", client_for(pool.checkout).scheme
        assert_equal "/var/run/redis.sock", pool.checkout.connection.fetch(:location)
        assert_equal 0, pool.checkout.connection.fetch(:db)
      end

      it "uses a given :path and :db" do
        pool = Sidekiq::RedisConnection.create(:path => "/var/run/redis.sock", :db => 8)
        assert_equal "unix", client_for(pool.checkout).scheme
        assert_equal "/var/run/redis.sock", pool.checkout.connection.fetch(:location)
        assert_equal 8, pool.checkout.connection.fetch(:db)
      end
    end

    describe "pool_timeout" do
      it "uses a given :timeout over the default of 1" do
        pool = Sidekiq::RedisConnection.create(:pool_timeout => 5)

        assert_equal 5, pool.instance_eval{ @timeout }
      end

      it "uses the default timeout of 1 if no override" do
        pool = Sidekiq::RedisConnection.create

        assert_equal 1, pool.instance_eval{ @timeout }
      end
    end
  end

  describe ".determine_redis_provider" do

    before do
      @old_env = ENV.to_hash
    end

    after do
      ENV.update(@old_env)
    end

    def with_env_var(var, uri, skip_provider=false)
      vars = ['REDISTOGO_URL', 'REDIS_PROVIDER', 'REDIS_URL'] - [var]
      vars.each do |v|
        next if skip_provider
        ENV[v] = nil
      end
      ENV[var] = uri
      assert_equal uri, Sidekiq::RedisConnection.__send__(:determine_redis_provider)
      ENV[var] = nil
    end

    describe "with REDISTOGO_URL and a parallel REDIS_PROVIDER set" do
      it "sets connection URI to the provider" do
        uri = 'redis://sidekiq-redis-provider:6379/0'
        provider = 'SIDEKIQ_REDIS_PROVIDER'

        ENV['REDIS_PROVIDER'] = provider
        ENV[provider] = uri
        ENV['REDISTOGO_URL'] = 'redis://redis-to-go:6379/0'
        with_env_var provider, uri, true

        ENV[provider] = nil
      end
    end

    describe "with REDIS_PROVIDER set" do
      it "sets connection URI to the provider" do
        uri = 'redis://sidekiq-redis-provider:6379/0'
        provider = 'SIDEKIQ_REDIS_PROVIDER'

        ENV['REDIS_PROVIDER'] = provider
        ENV[provider] = uri

        with_env_var provider, uri, true

        ENV[provider] = nil
      end
    end

    describe "with REDIS_URL set" do
      it "sets connection URI to custom uri" do
        with_env_var 'REDIS_URL', 'redis://redis-uri:6379/0'
      end
    end

  end
end