locals {
  selector = var.selector==null?var.labels:var.selector
  app_slug = "${var.instance}${var.component==""?"":"-"}${var.component}"
  cluster_ports = var.svc_type == "ClusterIP" ? [for idx, target in var.targets : {
    "name"       = target
    "port"       = var.ports[idx]
    "protocol"   = var.protocols[idx]
    "targetPort" = target
  }] : []
  ext_ports = var.svc_type == "ExternalName" ? [for idx, target in var.targets : {
    "name"       = target
    "port"       = var.ports[idx]
    "protocol"   = var.protocols[idx]
    "targetPort" = var.ports[idx]
  }] : []
  lb_ports = var.svc_type == "LoadBalancer" ? [for idx, port in var.lb_ports : {
    "port"       = port
    "targetPort" = var.ports[idx]
  }] : []
  node_ports = var.svc_type == "NodePort" ? [for idx, port in var.ports : {
    "port"       = port
    "targetPort" = port
    "nodePort"   = var.node_ports[idx]
  }] : []
  metadata = merge(
    {
      "name"= "${local.app_slug}"
      "namespace"= var.namespace
      "labels"= var.labels
    },
    length(var.annotations) > 0 ? {
      "annotations"= var.annotations
    } : {}
  )
  spec = {
    "ClusterIP" = {
      type     = "ClusterIP"
      ports    = local.cluster_ports
      selector = local.selector
    },
    "ExternalName" = {
      type         = "ExternalName"
      externalName = var.target_host
      ports = local.ext_ports
    },
    "NodePort" = {
      type     = "NodePort"
      selector = local.selector
      ports    = local.node_ports
    },
    "LoadBalancer" = {
      type     = "LoadBalancer"
      selector = local.selector
      ports    = local.lb_ports
      externalTrafficPolicy = var.lb_policy
    }
  }
}
resource "kubectl_manifest" "service" {
  yaml_body = <<-EOF
    apiVersion: v1
    kind: Service
    metadata: ${jsonencode(local.metadata)}
    spec: ${jsonencode(local.spec[var.svc_type])}
  EOF
}