/**
 * Copyright (c) 2021 OpenLens Authors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

import { ipcMain, IpcMainInvokeEvent } from "electron";
import type { KubernetesCluster } from "../../common/catalog-entities";
import { clusterFrameMap } from "../../common/cluster-frames";
import { clusterActivateHandler, clusterSetFrameIdHandler, clusterVisibilityHandler, clusterRefreshHandler, clusterDisconnectHandler, clusterKubectlApplyAllHandler, clusterKubectlDeleteAllHandler } from "../../common/cluster-ipc";
import { ClusterId, ClusterStore } from "../../common/cluster-store";
import { appEventBus } from "../../common/event-bus";
import { ClusterGetResourcesChannel, ClusterGlobalWatchChannel, ClusterResourceIsAllowedChannel, ipcMainHandle } from "../../common/ipc";
import { catalogEntityRegistry } from "../catalog";
import { ResourceApplier } from "../resource-applier";

export function initIpcMainHandlers() {
  ipcMainHandle(clusterActivateHandler, (event, clusterId: ClusterId, force = false) => {
    return ClusterStore.getInstance()
      .getById(clusterId)
      ?.activate(force);
  });

  ipcMainHandle(clusterSetFrameIdHandler, (event: IpcMainInvokeEvent, clusterId: ClusterId) => {
    const cluster = ClusterStore.getInstance().getById(clusterId);

    if (cluster) {
      clusterFrameMap.set(cluster.id, { frameId: event.frameId, processId: event.processId });
      cluster.pushState();
    }
  });

  ipcMainHandle(clusterVisibilityHandler, (event: IpcMainInvokeEvent, clusterId: ClusterId, visible: boolean) => {
    const entity = catalogEntityRegistry.getById<KubernetesCluster>(clusterId);

    for (const kubeEntity of catalogEntityRegistry.getItemsForApiKind(entity.apiVersion, entity.kind)) {
      kubeEntity.status.active = false;
    }

    if (entity) {
      entity.status.active = visible;
    }
  });

  ipcMainHandle(clusterRefreshHandler, (event, clusterId: ClusterId) => {
    return ClusterStore.getInstance()
      .getById(clusterId)
      ?.refresh({ refreshMetadata: true });
  });

  ipcMainHandle(clusterDisconnectHandler, (event, clusterId: ClusterId) => {
    appEventBus.emit({ name: "cluster", action: "stop" });
    const cluster = ClusterStore.getInstance().getById(clusterId);

    if (cluster) {
      cluster.disconnect();
      clusterFrameMap.delete(cluster.id);
    }
  });

  ipcMainHandle(clusterKubectlApplyAllHandler, async (event, clusterId: ClusterId, resources: string[], extraArgs: string[]) => {
    appEventBus.emit({ name: "cluster", action: "kubectl-apply-all" });
    const cluster = ClusterStore.getInstance().getById(clusterId);

    if (cluster) {
      const applier = new ResourceApplier(cluster);

      try {
        const stdout = await applier.kubectlApplyAll(resources, extraArgs);

        return { stdout };
      } catch (error: any) {
        return { stderr: error };
      }
    } else {
      throw `${clusterId} is not a valid cluster id`;
    }
  });

  ipcMainHandle(clusterKubectlDeleteAllHandler, async (event, clusterId: ClusterId, resources: string[], extraArgs: string[]) => {
    appEventBus.emit({ name: "cluster", action: "kubectl-delete-all" });
    const cluster = ClusterStore.getInstance().getById(clusterId);

    if (cluster) {
      const applier = new ResourceApplier(cluster);

      try {
        const stdout = await applier.kubectlDeleteAll(resources, extraArgs);

        return { stdout };
      } catch (error: any) {
        return { stderr: error };
      }
    } else {
      throw `${clusterId} is not a valid cluster id`;
    }
  });

  ipcMain.handle(ClusterGetResourcesChannel, async (event, clusterId: ClusterId) => {
    // This needs to be `ipcMain.handle` because `utils.toJS` throws on `class T extends Map`
    // mobx refuses to change that: https://github.com/mobxjs/mobx/pull/2980
    return ClusterStore.getInstance()
      .getById(clusterId)
      ?.getApiResourceMap();
  });

  ipcMainHandle(ClusterResourceIsAllowedChannel, async (event, clusterId: ClusterId, namespaces: string[]): Promise<string[]> => {
    const cluster = ClusterStore.getInstance().getById(clusterId);

    if (!cluster) {
      return [];
    }

    const isAllowed = new Set<string>();

    await Promise.all(
      namespaces.map(async namespace => {
        for (const resource of await cluster.getIsAllowedResources(namespace)) {
          isAllowed.add(resource);
        }
      })
    );

    return Array.from(isAllowed);
  });

  ipcMainHandle(ClusterGlobalWatchChannel, async (event, clusterId: ClusterId): Promise<boolean> => {
    const cluster = ClusterStore.getInstance().getById(clusterId);

    if (!cluster) {
      throw `${clusterId} is not a valid cluster id`;
    }

    if (cluster.accessibleNamespaces.length > 0) {
      /**
       * Don't allow global watching when the user has specified namespaces.
       * Assume that the cluster can't even list namespaces
       */
      return false;
    }

    return cluster.canUseWatchApi({ resource: "*" });
  });
}