/*
 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 * SPDX-License-Identifier: MIT-0
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this
 * software and associated documentation files (the "Software"), to deal in the Software
 * without restriction, including without limitation the rights to use, copy, modify,
 * merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

terraform {
  required_version = ">= 1.0.1"

  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 3.66.0"
    }
    kubernetes = {
      source  = "hashicorp/kubernetes"
      version = "~> 2.6.1"
    }
    helm = {
      source  = "hashicorp/helm"
      version = "~> 2.4.1"
    }
  }
}

provider "aws" {
  region = data.aws_region.current.id
  alias  = "default"
}

terraform {
  backend "local" {
    path = "local_tf_state/terraform-main.tfstate"
  }
}

data "aws_region" "current" {}

locals {
  tenant      = "aws001"  # AWS account name or unique id for tenant
  environment = "preprod" # Environment area eg., preprod or prod
  zone        = "dev"     # Environment with in one sub_tenant or business unit

  kubernetes_version = "1.21"

  vpc_cidr     = "10.1.0.0/16"
  vpc_name     = join("-", [local.tenant, local.environment, local.zone, "vpc"])
  cluster_name = join("-", [local.tenant, local.environment, local.zone, "eks"])

  terraform_version = "Terraform v1.0.1"
}

module "aws_vpc" {
  source  = "terraform-aws-modules/vpc/aws"
  version = "v3.2.0"

  name = local.vpc_name
  cidr = local.vpc_cidr
  azs  = ["us-east-1a", "us-east-1b", "us-east-1c"]

  private_subnets = ["10.1.1.0/24", "10.1.2.0/24", "10.1.3.0/24"]
  public_subnets  = ["10.1.11.0/24", "10.1.12.0/24", "10.1.13.0/24"]

  enable_nat_gateway   = true
  create_igw           = true
  enable_dns_hostnames = true

  public_subnet_tags = {
    "kubernetes.io/cluster/${local.cluster_name}" = "shared"
    "kubernetes.io/role/elb"                      = "1"
  }

  private_subnet_tags = {
    "kubernetes.io/cluster/${local.cluster_name}" = "shared"
    "kubernetes.io/role/internal-elb"             = "1"
  }

}
#---------------------------------------------------------------
# Example to consume aws-eks-accelerator-for-terraform module
#---------------------------------------------------------------
module "aws_eks_accelerator" {
  source = "github.com/aws-samples/aws-eks-accelerator-for-terraform"

  tenant            = local.tenant
  environment       = local.environment
  zone              = local.zone
  terraform_version = local.terraform_version

  # EKS Cluster VPC and Subnet mandatory config
  vpc_id             = module.aws_vpc.vpc_id
  private_subnet_ids = module.aws_vpc.private_subnets

  # EKS CONTROL PLANE VARIABLES
  create_eks         = true
  kubernetes_version = local.kubernetes_version

  # Ensure AWS VPC CNI is used
  enable_vpc_cni_addon  = true
  vpc_cni_addon_version = "v1.10.1-eksbuild.1"

  # MANAGED NODE GROUPS

  managed_node_groups = {
    mng_spot_medium = {
      node_group_name = "mng-spot-med"
      capacity_type   = "SPOT"
      instance_types  = ["t3.medium", "t3a.medium"]
      subnet_ids      = module.aws_vpc.private_subnets
      desired_size    = "2"
      disk_size       = 30
    }
  }

  # SELF-MANAGED NODE GROUPS
  # Enable Windows support
  enable_windows_support = true # default false

  self_managed_node_groups = {
    ng_od_windows = {
      node_group_name        = "ng-od-windows"
      create_launch_template = true
      launch_template_os     = "windows"
      instance_type          = "m5n.large"
      subnet_ids             = module.aws_vpc.private_subnets
      desired_size           = "2"
    }
  }
}


module "kubernetes-addons" {
  source = "github.com/aws-samples/aws-eks-accelerator-for-terraform//modules/kubernetes-addons"

  eks_cluster_id = module.aws-eks-accelerator-for-terraform.eks_cluster_id
  # EKS Managed Add-ons
  enable_amazon_eks_vpc_cni = true

}