# Local Docker Registry — push images locally, no DockerHub
resource "kubernetes_namespace" "registry" {
  metadata {
    name = "registry"
    labels = {
      managed-by = "terraform"
      tier       = "infrastructure"
    }
  }
}

resource "kubernetes_persistent_volume_claim" "registry_data" {
  metadata {
    name      = "registry-data"
    namespace = kubernetes_namespace.registry.metadata[0].name
  }

  spec {
    access_modes = ["ReadWriteOnce"]
    resources {
      requests = {
        storage = "50Gi"
      }
    }
  }
}

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

  spec {
    replicas = 1

    selector {
      match_labels = {
        app = "registry"
      }
    }

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

      spec {
        container {
          name  = "registry"
          image = "registry:2"

          port {
            container_port = 5000
          }

          volume_mount {
            name       = "data"
            mount_path = "/var/lib/registry"
          }

          resources {
            requests = {
              memory = "64Mi"
              cpu    = "50m"
            }
            limits = {
              memory = "256Mi"
              cpu    = "200m"
            }
          }
        }

        volume {
          name = "data"
          persistent_volume_claim {
            claim_name = kubernetes_persistent_volume_claim.registry_data.metadata[0].name
          }
        }
      }
    }
  }
}

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

  spec {
    selector = { app = "registry" }
    port {
      port        = 5000
      target_port = 5000
    }
    type = "ClusterIP"
  }
}

# Docker Registry UI — browse images and tags visually
resource "kubernetes_deployment" "registry_ui" {
  metadata {
    name      = "registry-ui"
    namespace = kubernetes_namespace.registry.metadata[0].name
    labels    = { app = "registry-ui" }
  }

  spec {
    replicas = 1
    selector {
      match_labels = { app = "registry-ui" }
    }
    template {
      metadata {
        labels = { app = "registry-ui" }
      }
      spec {
        container {
          name  = "registry-ui"
          image = "joxit/docker-registry-ui:latest"

          port {
            container_port = 80
          }

          env {
            name  = "REGISTRY_TITLE"
            value = "Nook Registry"
          }
          env {
            name  = "NGINX_PROXY_PASS_URL"
            value = "http://registry:5000"
          }
          env {
            name  = "SINGLE_REGISTRY"
            value = "true"
          }
          env {
            name  = "SHOW_CONTENT_DIGEST"
            value = "true"
          }
          env {
            name  = "DELETE_IMAGES"
            value = "true"
          }

          resources {
            requests = {
              memory = "32Mi"
              cpu    = "20m"
            }
            limits = {
              memory = "64Mi"
              cpu    = "100m"
            }
          }
        }
      }
    }
  }
}

resource "kubernetes_service" "registry_ui" {
  metadata {
    name      = "registry-ui"
    namespace = kubernetes_namespace.registry.metadata[0].name
  }

  spec {
    selector = { app = "registry-ui" }
    port {
      port        = 80
      target_port = 80
    }
    type = "ClusterIP"
  }
}