# Create KMS key and policies for certain encrypted configuration
resource "aws_kms_key" "workstation_kms_key" {
  description             = "${var.environment}-${var.service_name}"
  enable_key_rotation     = true
  deletion_window_in_days = 30

  tags = {
    environment        = var.environment
    service_name       = var.service_name
    application_family = var.application_family
    terraformed        = true
  }
}

resource "aws_kms_alias" "workstation_kms_alias" {
  name          = "alias/${var.environment}-${var.service_name}"
  target_key_id = aws_kms_key.workstation_kms_key.key_id
}

data "aws_iam_policy_document" "kms_decryption_policy" {
  statement {
    actions = [
      "kms:Decrypt",
      "kms:DescribeKey",
    ]

    resources = [
      aws_kms_key.workstation_kms_key.arn,
    ]
  }
}

# Create KMS policy
resource "aws_iam_policy" "workstation_kms_policy" {
  name   = "KMS-${var.environment}-${var.service_name}-policy"
  policy = data.aws_iam_policy_document.kms_decryption_policy.json

  tags = {
    environment        = var.environment
    service_name       = var.service_name
    application_family = var.application_family
    terraformed        = true
  }
}