# Redis deployment for session storage and Socket.IO

resource "kubernetes_deployment" "redis" {
  metadata {
    name      = "redis"
    namespace = kubernetes_namespace.abaci.metadata[0].name
    labels = {
      app = "redis"
    }
  }

  spec {
    replicas = 1

    selector {
      match_labels = {
        app = "redis"
      }
    }

    template {
      metadata {
        labels = {
          app = "redis"
        }
      }

      spec {
        container {
          name  = "redis"
          image = "redis:7-alpine"

          args = ["redis-server", "--appendonly", "yes"]

          port {
            container_port = 6379
          }

          resources {
            requests = {
              memory = "128Mi"
              cpu    = "100m"
            }
            limits = {
              memory = "256Mi"
              cpu    = "500m"
            }
          }

          volume_mount {
            name       = "redis-data"
            mount_path = "/data"
          }

          liveness_probe {
            exec {
              command = ["redis-cli", "ping"]
            }
            initial_delay_seconds = 5
            period_seconds        = 10
          }

          readiness_probe {
            exec {
              command = ["redis-cli", "ping"]
            }
            initial_delay_seconds = 5
            period_seconds        = 5
          }
        }

        volume {
          name = "redis-data"
          persistent_volume_claim {
            claim_name = kubernetes_persistent_volume_claim.redis_data.metadata[0].name
          }
        }
      }
    }
  }
}

resource "kubernetes_persistent_volume_claim" "redis_data" {
  metadata {
    name      = "redis-data"
    namespace = kubernetes_namespace.abaci.metadata[0].name
  }

  spec {
    access_modes = ["ReadWriteOnce"]
    resources {
      requests = {
        storage = "1Gi"
      }
    }
    storage_class_name = "local-path" # k3s default storage class
  }

  wait_until_bound = false # local-path uses WaitForFirstConsumer
}

resource "kubernetes_service" "redis" {
  metadata {
    name      = "redis"
    namespace = kubernetes_namespace.abaci.metadata[0].name
  }

  spec {
    selector = {
      app = "redis"
    }

    port {
      port        = 6379
      target_port = 6379
    }

    type = "ClusterIP"
  }
}