provider "aws" {
  region = local.region
}

provider "kubernetes" {
  host                   = module.eks.cluster_endpoint
  cluster_ca_certificate = base64decode(module.eks.cluster_certificate_authority_data)
  token                  = data.aws_eks_cluster_auth.this.token
}

provider "helm" {
  kubernetes {
    host                   = module.eks.cluster_endpoint
    cluster_ca_certificate = base64decode(module.eks.cluster_certificate_authority_data)
    token                  = data.aws_eks_cluster_auth.this.token
  }
}

provider "kubectl" {
  apply_retry_count      = 10
  host                   = module.eks.cluster_endpoint
  cluster_ca_certificate = base64decode(module.eks.cluster_certificate_authority_data)
  load_config_file       = false
  token                  = data.aws_eks_cluster_auth.this.token
}

data "aws_eks_cluster_auth" "this" {
  name = module.eks.cluster_name
}

data "aws_caller_identity" "current" {}
data "aws_availability_zones" "available" {}

locals {
  name   = basename(path.cwd)
  region = "us-west-2"

  vpc_cidr = "10.0.0.0/16"
  azs      = slice(data.aws_availability_zones.available.names, 0, 3)

  tags = {
    Blueprint  = local.name
    GithubRepo = "github.com/aws-ia/terraform-aws-eks-blueprints"
  }
}

################################################################################
# Cluster
################################################################################

#tfsec:ignore:aws-eks-enable-control-plane-logging
module "eks" {
  source  = "terraform-aws-modules/eks/aws"
  version = "~> 19.13"

  cluster_name                   = local.name
  cluster_version                = "1.27"
  cluster_endpoint_public_access = true

  vpc_id     = module.vpc.vpc_id
  subnet_ids = module.vpc.private_subnets

  eks_managed_node_groups = {
    initial = {
      instance_types = ["m5.large"]

      min_size     = 1
      max_size     = 5
      desired_size = 2
    }
  }

  manage_aws_auth_configmap = true
  aws_auth_roles = flatten([
    module.eks_blueprints_admin_team.aws_auth_configmap_role,
    [for team in module.eks_blueprints_dev_teams : team.aws_auth_configmap_role],
  ])

  tags = local.tags
}

################################################################################
# EKS Blueprints Teams
################################################################################

module "eks_blueprints_admin_team" {
  source  = "aws-ia/eks-blueprints-teams/aws"
  version = "~> 1.0"

  name = "admin-team"

  enable_admin = true
  users        = [data.aws_caller_identity.current.arn]
  cluster_arn  = module.eks.cluster_arn

  tags = local.tags
}

module "eks_blueprints_dev_teams" {
  source  = "aws-ia/eks-blueprints-teams/aws"
  version = "~> 1.0"

  for_each = {
    red = {
      labels = {
        project = "SuperSecret"
      }
    }
    blue = {}
  }
  name = "team-${each.key}"

  users             = [data.aws_caller_identity.current.arn]
  cluster_arn       = module.eks.cluster_arn
  oidc_provider_arn = module.eks.oidc_provider_arn

  labels = merge(
    {
      team = each.key
    },
    try(each.value.labels, {})
  )

  annotations = {
    team = each.key
  }

  namespaces = {
    "team-${each.key}" = {
      labels = {
        appName     = "${each.key}-team-app",
        projectName = "project-${each.key}",
      }

      resource_quota = {
        hard = {
          "requests.cpu"    = "2000m",
          "requests.memory" = "4Gi",
          "limits.cpu"      = "4000m",
          "limits.memory"   = "16Gi",
          "pods"            = "20",
          "secrets"         = "20",
          "services"        = "20"
        }
      }

      limit_range = {
        limit = [
          {
            type = "Pod"
            max = {
              cpu    = "200m"
              memory = "1Gi"
            }
          },
          {
            type = "PersistentVolumeClaim"
            min = {
              storage = "24M"
            }
          },
          {
            type = "Container"
            default = {
              cpu    = "50m"
              memory = "24Mi"
            }
          }
        ]
      }
    }
  }

  tags = local.tags
}

################################################################################
# Supporting Resoruces
################################################################################

module "vpc" {
  source  = "terraform-aws-modules/vpc/aws"
  version = "~> 5.0"

  name = local.name
  cidr = local.vpc_cidr

  azs             = local.azs
  private_subnets = [for k, v in local.azs : cidrsubnet(local.vpc_cidr, 4, k)]
  public_subnets  = [for k, v in local.azs : cidrsubnet(local.vpc_cidr, 8, k + 48)]

  enable_nat_gateway = true
  single_nat_gateway = true

  public_subnet_tags = {
    "kubernetes.io/role/elb" = 1
  }

  private_subnet_tags = {
    "kubernetes.io/role/internal-elb" = 1
  }

  tags = local.tags
}