/**
 * Copyright (c) OpenLens Authors. All rights reserved.
 * Licensed under MIT License. See LICENSE in root directory for more information.
 */

import "./limit-range-details.scss";

import React from "react";
import { observer } from "mobx-react";
import type { KubeObjectDetailsProps } from "../kube-object-details";
import type { LimitRangeItem } from "../../../common/k8s-api/endpoints/limit-range.api";
import { LimitPart, LimitRange, Resource } from "../../../common/k8s-api/endpoints/limit-range.api";
import { KubeObjectMeta } from "../kube-object-meta";
import { DrawerItem } from "../drawer/drawer-item";
import { Badge } from "../badge";
import logger from "../../../common/logger";

export interface LimitRangeDetailsProps extends KubeObjectDetailsProps<LimitRange> {
}

function renderLimit(limit: LimitRangeItem, part: LimitPart, resource: Resource) {

  const resourceLimit = limit[part]?.[resource];

  if (!resourceLimit) {
    return null;
  }

  return <Badge label={`${part}:${resourceLimit}`}/>;
}

function renderResourceLimits(limit: LimitRangeItem, resource: Resource) {
  return (
    <React.Fragment key={limit.type + resource}>
      {renderLimit(limit, LimitPart.MIN, resource)}
      {renderLimit(limit, LimitPart.MAX, resource)}
      {renderLimit(limit, LimitPart.DEFAULT, resource)}
      {renderLimit(limit, LimitPart.DEFAULT_REQUEST, resource)}
      {renderLimit(limit, LimitPart.MAX_LIMIT_REQUEST_RATIO, resource)}
    </React.Fragment>
  );
}

function renderLimitDetails(limits: LimitRangeItem[], resources: Resource[]) {

  return resources.map(resource => (
    <DrawerItem key={resource} name={resource}>
      {
        limits.map(limit => renderResourceLimits(limit, resource))
      }
    </DrawerItem>
  ));
}

@observer
export class LimitRangeDetails extends React.Component<LimitRangeDetailsProps> {
  render() {
    const { object: limitRange } = this.props;

    if (!limitRange) {
      return null;
    }

    if (!(limitRange instanceof LimitRange)) {
      logger.error("[LimitRangeDetails]: passed object that is not an instanceof LimitRange", limitRange);

      return null;
    }

    const containerLimits = limitRange.getContainerLimits();
    const podLimits = limitRange.getPodLimits();
    const pvcLimits = limitRange.getPVCLimits();

    return (
      <div className="LimitRangeDetails">
        <KubeObjectMeta object={limitRange}/>

        {containerLimits.length > 0 && (
          <DrawerItem name="Container Limits" labelsOnly>
            {
              renderLimitDetails(containerLimits, [Resource.CPU, Resource.MEMORY, Resource.EPHEMERAL_STORAGE])
            }
          </DrawerItem>
        )}
        {podLimits.length > 0 && (
          <DrawerItem name="Pod Limits" labelsOnly>
            {
              renderLimitDetails(podLimits, [Resource.CPU, Resource.MEMORY, Resource.EPHEMERAL_STORAGE])
            }
          </DrawerItem>
        )}
        {pvcLimits.length > 0 && (
          <DrawerItem name="Persistent Volume Claim Limits" labelsOnly>
            {
              renderLimitDetails(pvcLimits, [Resource.STORAGE])
            }
          </DrawerItem>
        )}
      </div>
    );
  }
}