locals {
  tags = {
    "Name"        = "${var.tags_name}"
    "Environment" = "${var.tags_environment}"
  }
}

# Create VPC
resource "aws_vpc" "vpc" {
  assign_generated_ipv6_cidr_block = var.vpc_assign_generated_ipv6_cidr_block
  cidr_block                       = var.vpc_cidr_block
  enable_dns_hostnames             = var.vpc_enable_dns_hostnames
  enable_dns_support               = var.vpc_enable_dns_support
  instance_tenancy                 = var.vpc_instance_tenancy
  tags                             = local.tags
}

# Create Security Groups
resource "aws_security_group" "security_group" {
  depends_on = [
    aws_vpc.vpc
  ]
  description            = var.security_group_description
  name                   = var.security_group_name
  revoke_rules_on_delete = var.security_group_revoke_rules_on_delete
  tags                   = local.tags
  vpc_id                 = aws_vpc.vpc.id

  dynamic "ingress" {
    for_each = var.security_group_ingress
    content {
      from_port        = ingress.value["from_port"]
      to_port          = ingress.value["to_port"]
      protocol         = ingress.value["protocol"]
      cidr_blocks      = ingress.value["cidr_blocks"]
      ipv6_cidr_blocks = ingress.value["ipv6_cidr_blocks"]
    }
  }
  dynamic "egress" {
    for_each = var.security_group_egress
    content {
      from_port        = ingress.value["from_port"]
      to_port          = ingress.value["to_port"]
      protocol         = ingress.value["protocol"]
      cidr_blocks      = ingress.value["cidr_blocks"]
      ipv6_cidr_blocks = ingress.value["ipv6_cidr_blocks"]
    }
  }
}

# Create Gateway
resource "aws_internet_gateway" "internet_gateway" {
  depends_on = [
    aws_vpc.vpc
  ]
  tags   = local.tags
  vpc_id = aws_vpc.vpc.id
}

# Create Routes
resource "aws_route" "route" {
  depends_on = [
    aws_vpc.vpc,
    aws_internet_gateway.internet_gateway
  ]
  destination_cidr_block      = "0.0.0.0/0"
  gateway_id                  = aws_internet_gateway.internet_gateway.id
  route_table_id              = aws_vpc.vpc.main_route_table_id
}

# Create Subnets
resource "aws_subnet" "subnet" {
  depends_on = [
    aws_vpc.vpc
  ]
  assign_ipv6_address_on_creation = var.subnet_assign_ipv6_address_on_creation
  availability_zone               = var.subnet_availability_zone
  cidr_block                      = aws_vpc.vpc.cidr_block
  ipv6_cidr_block                 = cidrsubnet(aws_vpc.vpc.ipv6_cidr_block, 8, 1)
  map_public_ip_on_launch         = var.subnet_map_public_ip_on_launch
  tags                            = local.tags
  vpc_id                          = aws_vpc.vpc.id
}