require "helper"
require "inspec/resource"
require "resources/aws/aws_flow_log"

require "resource_support/aws"

class EmptyAwsFlowLog < Minitest::Test
  def setup
    AwsFlowLog::BackendFactory.select(MockAwsFlowLog::Empty)
  end

  def test_rejects_empty_params
    assert_raises(ArgumentError) { AwsFlowLog.new }
  end

  def test_search_hit_via_scalar_fails
    refute AwsFlowLog.new(flow_log_id: "fl-abcd1234").exists?
  end

  def test_rejects_unrecognized_params
    assert_raises(ArgumentError) { AwsFlowLog.new(shoe_size: 9) }
  end
end

class BasicAwsFlowLog < Minitest::Test
  def setup
    AwsFlowLog::BackendFactory.select(MockAwsFlowLog::Basic)
  end

  def test_search_hit
    assert AwsFlowLog.new(flow_log_id: "fl-abcd1111").exists?
  end

  def test_to_s
    assert_equal "AWS Flow Log fl-abcd1234",
                 AwsFlowLog.new(flow_log_id: "fl-abcd1234").to_s
    assert_equal "AWS Flow Log fl-abcd3333",
                 AwsFlowLog.new(subnet_id: "subnet-abcd3333").to_s
    assert_equal "AWS Flow Log fl-abcd1111",
                 AwsFlowLog.new(vpc_id: "vpc-abcd1111").to_s
  end

  def test_flow_log_id
    assert_equal "fl-abcd1111", AwsFlowLog.new(flow_log_id: "fl-abcd1111").flow_log_id
  end

  def test_log_group_name
    assert_equal "inspec-abcd1111", AwsFlowLog.new(flow_log_id: "fl-abcd1111").log_group_name
  end

  def test_resource_id
    assert_equal "vpc-abcd1111", AwsFlowLog.new(flow_log_id: "fl-abcd1111").resource_id
    assert_equal "eni-abcd2222", AwsFlowLog.new(flow_log_id: "fl-abcd2222").resource_id
    assert_equal "subnet-abcd3333", AwsFlowLog.new(flow_log_id: "fl-abcd3333").resource_id
  end

  def test_resource_type
    assert_equal "vpc", AwsFlowLog.new(flow_log_id: "fl-abcd1111").resource_type
    assert_equal "eni", AwsFlowLog.new(flow_log_id: "fl-abcd2222").resource_type
    assert_equal "subnet", AwsFlowLog.new(flow_log_id: "fl-abcd3333").resource_type
  end

  def test_search_miss
    flowlog = AwsFlowLog.new(flow_log_id: "fl-12341234")
    refute flowlog.exists?
    assert_nil flowlog.log_group_name
    assert_nil flowlog.resource_id
    assert_equal "AWS Flow Log fl-12341234", flowlog.to_s
  end

  def test_search_subnet_miss
    flowlog = AwsFlowLog.new(subnet_id: "subnet-12341234")
    refute flowlog.exists?
    assert_nil flowlog.log_group_name
    assert_nil flowlog.resource_id
    assert_equal "AWS Flow Log subnet-12341234", flowlog.to_s
  end

  def test_search_vpc_miss
    flowlog = AwsFlowLog.new(vpc_id: "vpc-12341234")
    refute flowlog.exists?
    assert_nil flowlog.log_group_name
    assert_nil flowlog.resource_id
    assert_equal "AWS Flow Log vpc-12341234", flowlog.to_s
  end

  def test_attached_to?
    assert AwsFlowLog.new(flow_log_id: "fl-abcd1111").attached_to_vpc?
    assert AwsFlowLog.new(flow_log_id: "fl-abcd2222").attached_to_eni?
    assert AwsFlowLog.new(flow_log_id: "fl-abcd3333").attached_to_subnet?
  end
end

module MockAwsFlowLog
  class Empty < AwsBackendBase
    def describe_flow_logs(query)
      Aws::EC2::Types::DescribeFlowLogsResult.new(
        flow_logs: []
      )
    end
  end

  class Basic < AwsBackendBase
    def describe_flow_logs(query)
      resp = Aws::EC2::Types::DescribeFlowLogsResult.new(
        flow_logs: [
          Aws::EC2::Types::FlowLog.new(
            flow_log_id: "fl-abcd1111",
            log_group_name: "inspec-abcd1111",
            resource_id: "vpc-abcd1111"
          ),
          Aws::EC2::Types::FlowLog.new(
            flow_log_id: "fl-abcd2222",
            log_group_name: "inspec-abcd2222",
            resource_id: "eni-abcd2222"
          ),
          Aws::EC2::Types::FlowLog.new(
            flow_log_id: "fl-abcd3333",
            log_group_name: "inspec-abcd3333",
            resource_id: "subnet-abcd3333"
          ),
        ]
      )

      selected = resp[:flow_logs].select do |fl|
        query[:filter].all? do |filter|
          filter[:values].include?(fl[filter[:name].tr("-", "_")])
        end
      end

      OpenStruct.new({ flow_logs: selected })
    end
  end
end