import "./pod-container-env.scss";

import React, { useEffect, useState } from "react";
import flatten from "lodash/flatten";
import { observer } from "mobx-react";
import { Trans } from "@lingui/macro";
import { PodContainer, Secret } from "../../api/endpoints";
import { DrawerItem } from "../drawer";
import { autorun } from "mobx";
import { secretsStore } from "../+config-secrets/secrets.store";
import { configMapsStore } from "../+config-maps/config-maps.store";
import { Icon } from "../icon";
import { base64, cssNames } from "../../utils";

interface Props {
  container: PodContainer;
  namespace: string;
}

export const ContainerEnvironment = observer((props: Props) => {
  const { container: { env, envFrom }, namespace } = props;

  useEffect(
    () =>
      autorun(() => {
        env && env.forEach(variable => {
          const { valueFrom } = variable;
          if (valueFrom && valueFrom.configMapKeyRef) {
            configMapsStore.load({ name: valueFrom.configMapKeyRef.name, namespace });
          }
        });
        envFrom && envFrom.forEach(item => {
          const { configMapRef } = item;
          if (configMapRef && configMapRef.name) {
            configMapsStore.load({ name: configMapRef.name, namespace });
          }
        });
      }),
    []
  );

  const renderEnv = (): JSX.Element[] => {
    return env.map(variable => {
      const { name, value, valueFrom } = variable;
      let secretValue = null;

      if (value) {
        secretValue = value;
      }
      if (valueFrom) {
        const { fieldRef, secretKeyRef, configMapKeyRef } = valueFrom;
        if (fieldRef) {
          const { apiVersion, fieldPath } = fieldRef;
          secretValue = `fieldRef(${apiVersion}:${fieldPath})`;
        }
        if (secretKeyRef) {
          secretValue = (
            <SecretKey
              reference={secretKeyRef}
              namespace={namespace}
            />
          );
        }
        if (configMapKeyRef) {
          const { name, key } = configMapKeyRef;
          const configMap = configMapsStore.getByName(name, namespace);
          secretValue = configMap ?
            configMap.data[key] :
            `configMapKeyRef(${name}${key})`;
        }
      }

      return (
        <div className="variable" key={name}>
          <span className="var-name">{name}</span>: {secretValue}
        </div>
      );
    });
  };

  const renderEnvFrom = (): JSX.Element[] => {
    const envVars = envFrom.map(vars => {
      if (!vars.configMapRef || !vars.configMapRef.name) {
        return;
      }
      const configMap = configMapsStore.getByName(vars.configMapRef.name, namespace);
      if (!configMap) {
        return;
      }
      return Object.entries(configMap.data).map(([name, value]) => (
        <div className="variable" key={name}>
          <span className="var-name">{name}</span>: {value}
        </div>
      ));
    });
    return flatten(envVars);
  };

  return (
    <DrawerItem name={<Trans>Environment</Trans>} className="ContainerEnvironment">
      {env && renderEnv()}
      {envFrom && renderEnvFrom()}
    </DrawerItem>
  );
});

interface SecretKeyProps {
  reference: {
    name: string;
    key: string;
  };
  namespace: string;
}

const SecretKey = (props: SecretKeyProps): JSX.Element => {
  const { reference: { name, key }, namespace } = props;
  const [loading, setLoading] = useState(false);
  const [secret, setSecret] = useState<Secret>();

  const showKey = async (): Promise<void> => {
    setLoading(true);
    const secret = await secretsStore.load({ name, namespace });
    setLoading(false);
    setSecret(secret);
  };

  if (secret?.data?.[key]) {
    return <>{base64.decode(secret.data[key])}</>;
  }

  return (
      <>
        secretKeyRef({name}.{key})&nbsp;
        <Icon
          className={cssNames("secret-button", { loading })}
          material="visibility"
          tooltip={<Trans>Show</Trans>}
          onClick={showKey}
        />
      </>
  );
};