main.tf

provider "aws" {
  region = var.region
}

# Create VPC
resource "aws_vpc" "main" {
  cidr_block                     = var.vpc_cidr
  enable_dns_support             = var.enable_dns_support
  enable_dns_hostnames           = var.enable_dns_hostnames
  enable_classiclink             = var.enable_classiclink
  enable_classiclink_dns_support = var.enable_classiclink_dns_support


  tags = merge(
    var.tags,
    {
      Name = format("%s-VPC", var.name)
    },
  )
}

# Get list of availability zones
data "aws_availability_zones" "available" {
  state = "available"
}

# Create public subnets
resource "aws_subnet" "public" {
  count                   = var.preferred_number_of_public_subnets == null ? length(data.aws_availability_zones.available.names) : var.preferred_number_of_public_subnets
  vpc_id                  = aws_vpc.main.id
  cidr_block              = cidrsubnet(var.vpc_cidr, 8, count.index)
  map_public_ip_on_launch = true
  availability_zone       = data.aws_availability_zones.available.names[count.index]

  tags = merge(
    var.tags,
    {
      Name = format("%s-PublicSubnet-%s", var.name, count.index)
    },
  )


}



resource "aws_subnet" "private" {
  count                   = var.preferred_number_of_private_subnets == null ? length(data.aws_availability_zones.available.names) : var.preferred_number_of_private_subnets
  vpc_id                  = aws_vpc.main.id
  cidr_block              = cidrsubnet(var.vpc_cidr, 8, count.index + 2)
  map_public_ip_on_launch = true
  availability_zone       = data.aws_availability_zones.available.names[count.index]

  tags = merge(
    var.tags,
    {
      Name = format("%s-PrivateSubnet-%s", var.name, count.index)
    },
  )

}