resource "random_uuid" "identifier" {
}

locals {
  label_name = format("%s-%s", var.application_name, random_uuid.identifier.result)
}

resource "kubernetes_persistent_volume_claim_v1" "storage" {
  for_each = var.volumes
  metadata {
    name      = format("%s-volumes-%s", var.application_name, each.key)
    namespace = var.namespace
  }
  spec {
    access_modes = ["ReadWriteMany"]
    resources {
      requests = {
        storage = "2Gi"
      }
    }
  }
}

resource "kubernetes_config_map_v1" "configuration_file" {
  count = var.config_content == null ? 0 : 1

  metadata {
    name      = "configuration-files"
    namespace = var.namespace
  }
  data = {
    "config" = var.config_content
  }
}

resource "kubernetes_deployment_v1" "deployment" {
  metadata {
    name      = var.application_name
    namespace = var.namespace
    labels    = {
      "app.kubernetes.io/part-of"    = var.application_name
      "app.kubernetes.io/managed-by" = "terraform"
    }
  }
  spec {
    replicas = var.replicas
    selector {
      match_labels = {
        "app.kubernetes.io/name" = local.label_name
      }
    }
    template {
      metadata {
        labels = {
          "app.kubernetes.io/name" = local.label_name
        }
      }
      spec {
        container {
          name              = var.application_name
          image             = format("%s:%s", var.image.name, var.image.tag)
          image_pull_policy = var.image.pull-policy
          args              = var.args

          dynamic port {
            for_each = var.ports
            content {
              name           = format("port-%s", port.key)
              container_port = port.value.container_port
            }
          }

          dynamic env {
            for_each = var.env
            content {
              name  = env.value.name
              value = env.value.value
            }
          }

          dynamic volume_mount {
            for_each = var.config_content != null ? [
              kubernetes_config_map_v1.configuration_file.0.metadata.0.name
            ] : []
            content {
              name       = "config-volume"
              mount_path = "/application/config.json"
              sub_path   = "config"
            }
          }

          dynamic volume_mount {
            for_each = var.volumes
            content {
              name = volume_mount.key
              mount_path = volume_mount.value.path
            }
          }
        }

        dynamic volume {
          for_each = var.volumes
          content {
            name = volume.key
            persistent_volume_claim {
              claim_name = format("%s-volumes-%s", var.application_name, volume.key)
            }
          }
        }
        dynamic volume {
          for_each = var.config_content != null ? [kubernetes_config_map_v1.configuration_file.0.metadata.0.name] : []
          content {
            name = "config-volume"
            config_map {
              name = volume.value
            }
          }
        }
      }
    }
  }
}