/*
 * Copyright © 2020 Atomist, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import * as k8s from "@kubernetes/client-node";
import * as _ from "lodash";
import { maskString } from "../support/error";
import { appMetadata } from "./metadata";
import { KubernetesDelete } from "./request";
import { specSnippet } from "./spec";

/**
 * Create KubernetesObject from KubernetesApplication and kind.  This
 * method only supports the types of resources managed as part of a
 * KuberneteApplication, namely: Namespace, Secret, Service,
 * ServiceAccount, Deployment, Ingress, ClusterRole,
 * ClusterRoleBinding, Role, and RoleBinding.
 *
 * @param app Kubernetes application
 * @param kind kind of object to return
 * @return proper Kubernetes resource object
 */
export function appObject(app: KubernetesDelete, kind: string): k8s.KubernetesObject {
    const ko: k8s.KubernetesObject = {
        apiVersion: "v1",
        kind,
        metadata: appMetadata(app),
    };
    /* tslint:disable:no-switch-case-fall-through */
    switch (kind) {
        case "Namespace":
            ko.metadata = appMetadata(app, { ns: "namespace" });
        case "Secret":
        case "Service":
        case "ServiceAccount":
            break;
        case "Deployment":
            ko.apiVersion = "apps/v1";
            break;
        case "Ingress":
            ko.apiVersion = "networking.k8s.io/v1beta1";
            break;
        case "ClusterRole":
        case "ClusterRoleBinding":
            ko.metadata = appMetadata(app, { ns: "cluster" });
        case "Role":
        case "RoleBinding":
            ko.apiVersion = "rbac.authorization.k8s.io/v1";
            break;
        default:
            throw new Error(`Unsupported kind of Kubernetes resource object: ${kind}`);
    }
    /* tslint:enable:no-switch-case-fall-through */
    return ko;
}

/**
 * Convert a full Kubernetes resource spec into a minimal KubernetesObject.
 *
 * @param spec Kubernetes spec to convert
 * @return Minimal Kubernetes object
 */
export function k8sObject(spec: k8s.KubernetesObject): k8s.KubernetesObject {
    const ko: k8s.KubernetesObject = {
        apiVersion: spec.apiVersion,
        kind: spec.kind,
        metadata: {
            labels: {
                "app.kubernetes.io/name": spec.metadata.labels["app.kubernetes.io/name"],
                "atomist.com/workspaceId": spec.metadata.labels["atomist.com/workspaceId"],
            },
            name: spec.metadata.name,
            namespace: spec.metadata.namespace,
        },
    };
    return ko;
}

/**
 * Safely stringify a Kubernetes resource spec, removing any sensitive
 * data, suitable for logging.  The string returned is a compact
 * representation, not pretty printed, and if it is long, it may be
 * truncated.
 *
 * @param spec Kubernetes spec to stringify
 * @return String representation of spec with sensitive information removed
 */
export function logObject(spec: k8s.KubernetesObject): string {
    if (spec.kind === "Secret") {
        const safeSpec: k8s.V1Secret = _.cloneDeep(spec);
        if (safeSpec.data) {
            for (const k of Object.keys(safeSpec.data)) {
                safeSpec.data[k] = maskString(safeSpec.data[k]);
            }
        }
        return specSnippet(safeSpec);
    } else {
        return specSnippet(spec);
    }
}