provider "aws" {
  region = var.aws_region
}

terraform {
  backend "s3" {
    bucket  = "dev-orcd-terraform-state"
    key     = "dev/lambda-kafka-consumer-example-v2/terraform.tfstate"
    region  = "us-east-1"
    encrypt = "true"
  }
}

data "aws_caller_identity" "current" {}

data "aws_msk_cluster" "msk_cluster" {
  cluster_name = var.trigger_msk_cluster_name
}

# create SNS and S3 Write policy
data "aws_iam_policy_document" "failure_destination_policy_document" {
  statement {
    effect = "Allow"
    actions = [
      "sns:Publish",
    ]
    resources = [
      "arn:aws:sns:us-east-1:103233932089:dev-lambda-kafka-consumer-example-v2-dlq"
    ]
  }
  statement {
    effect = "Allow"
    actions = [
      "s3:DeleteObject",
      "s3:DeleteObject*",
      "s3:GetObject",
      "s3:GetObject*",
      "s3:PutObject",
      "s3:PutObject*",
      "s3:GetBucketLocation",
      "s3:ListBucket",
    ]
    resources = [
      "arn:aws:s3:::dev-test-orcd-bucket",
      "arn:aws:s3:::dev-test-orcd-bucket/*"
    ]
  }
}
resource "aws_iam_policy" "failure_destination_policy" {
  name   = "${var.environment}-failure-destination-policy"
  description = "Access SNS and S3 from lambda"
  policy = data.aws_iam_policy_document.failure_destination_policy_document.json
}

# lambda configuration
module "lambda_example_kafka_consumer" {
  # checkov:skip=CKV_TF_2:deemed not safe to enable, will be silenced globally
  source                   = "git@github.com:aonamrata/terraform-lambda.git?ref=msk_event"
  environment              = var.environment
  lambda_name              = var.lambda_name
  lambda_description       = "Lambda Example Kafka"
  datadog_enabled          = var.datadog_enabled

  msk_use_lambda_name_as_consumer_id = true

  application_family = "kafka-data-highway"

  lambda_function_provisioned_concurrent_executions = var.lambda_provisioned_concurrent_executions
  lambda_function_timeout                           = "300"
  use_container_image                               = false
  use_s3_source                                     = true
  s3_source_bucket                                  = "dev-kafka-connect"
  custom_s3_source_key                              = "ibolshakov/lambda.zip"

  vpc_id                  = var.vpc_id
  vpc_subnet_ids          = var.vpc_subnet_ids
  zappa_s3_policy_enabled = false

  iam_managed_policy_attachments = [
    aws_iam_policy.failure_destination_policy.arn
  ]

  lambda_function_environment_variables = {
    Environment         = var.environment
    KAFKA_BROKERS       = data.aws_msk_cluster.msk_cluster.bootstrap_brokers_tls
  }

  msk_event_enabled                      = true
  event_source_mapping_batch_size        = 1
  event_source_mapping_msk_cluster_name  = var.trigger_msk_cluster_name
  event_source_mapping_msk_cluster_uuid  = var.trigger_msk_cluster_uuid
  event_source_mapping_starting_position = "LATEST"
  msk_topics                             = [var.kafka_topic, "cdc.musicGraphV5.hasSoundRecording"]
  event_source_mapping_failure_arn       = "arn:aws:sns:us-east-1:103233932089:dev-lambda-kafka-consumer-example-v2-dlq"
}