/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 axios from 'axios';
import * as React from 'react';
import * as classNames from 'classnames';
import { HashRouter, Route, Switch } from "react-router-dom";
import { Intent } from "@blueprintjs/core";
import { AppToaster } from './singletons/toaster';
import { HeaderBar, HeaderActiveTab } from './components/header-bar';
import { localStorageGet, localStorageSet } from './utils';
import { DRUID_DOCS_SQL, LEGACY_COORDINATOR_CONSOLE, LEGACY_OVERLORD_CONSOLE } from './variables';
import { HomeView } from './views/home-view';
import { DatasourcesView } from './views/datasource-view';
import { SegmentsView } from './views/segments-view';
import { ServersView } from './views/servers-view';
import { TasksView } from './views/tasks-view';
import { SqlView } from './views/sql-view';
import "./console-application.scss";

export interface ConsoleApplicationProps extends React.Props<any> {
  version: string;
}

export interface ConsoleApplicationState {
  aboutDialogOpen: boolean;
}

export class ConsoleApplication extends React.Component<ConsoleApplicationProps, ConsoleApplicationState> {
  static MESSAGE_KEY = 'druid-console-message';
  static MESSAGE_DISMISSED = 'dismissed';

  static async ensureSql() {
    try {
      await axios.post("/druid/v2/sql", { query: 'SELECT 1337' });
    } catch (e) {
      const { response } = e;
      if (response.status !== 405 || response.statusText !== "Method Not Allowed") return true; // other failure
      try {
        await axios.get("/status");
      } catch (e) {
        return true; // total failure
      }

      // Status works but SQL 405s => the SQL endpoint is disabled
      AppToaster.show({
        iconName: 'error',
        intent: Intent.DANGER,
        timeout: 120000,
        message: <>
          It appears that the SQL endpoint is disabled. Either <a
          href={DRUID_DOCS_SQL}>enable the SQL endpoint</a> or use the old <a
          href={LEGACY_COORDINATOR_CONSOLE}>coordinator</a> and <a
          href={LEGACY_OVERLORD_CONSOLE}>overlord</a> consoles that do not rely on the SQL endpoint.
        </>
      });
      return false
    }
    return true;
  }

  static async shownNotifications() {
    await ConsoleApplication.ensureSql();
  }

  private taskId: string | null;
  private datasource: string | null;
  private onlyUnavailable: boolean | null;
  private initSql: string | null;
  private middleManager: string | null;

  constructor(props: ConsoleApplicationProps, context: any) {
    super(props, context);
    this.state = {
      aboutDialogOpen: false
    };
  }

  componentDidMount(): void {
    ConsoleApplication.shownNotifications();
  }

  private resetInitialsDelay() {
    setTimeout(() => {
      this.taskId = null;
      this.datasource = null;
      this.onlyUnavailable = null;
      this.initSql = null;
      this.middleManager = null;
    }, 50);
  }

  private goToTask = (taskId: string) => {
    this.taskId = taskId;
    window.location.hash = 'tasks';
    this.resetInitialsDelay();
  }

  private goToSegments = (datasource: string, onlyUnavailable = false) => {
    this.datasource = datasource;
    this.onlyUnavailable = onlyUnavailable;
    window.location.hash = 'segments';
    this.resetInitialsDelay();
  }

  private goToMiddleManager = (middleManager: string) => {
    this.middleManager = middleManager;
    window.location.hash = 'servers';
    this.resetInitialsDelay();
  }

  private goToSql = (initSql: string) => {
    this.initSql = initSql;
    window.location.hash = 'sql';
    this.resetInitialsDelay();
  }

  render() {
    const wrapInViewContainer = (active: HeaderActiveTab, el: JSX.Element, scrollable = false) => {
      return <>
        <HeaderBar active={active}/>
        <div className={classNames('view-container', { scrollable })}>{el}</div>
      </>;
    };

    return <HashRouter hashType="noslash">
      <div className="console-application">
        <Switch>
          <Route path="/datasources" component={() => {
            return wrapInViewContainer('datasources', <DatasourcesView goToSql={this.goToSql} goToSegments={this.goToSegments}/>);
          }} />
          <Route path="/segments" component={() => {
            return wrapInViewContainer('segments', <SegmentsView datasource={this.datasource} onlyUnavailable={this.onlyUnavailable} goToSql={this.goToSql}/>);
          }} />
          <Route path="/tasks" component={() => {
            return wrapInViewContainer('tasks', <TasksView taskId={this.taskId} goToSql={this.goToSql} goToMiddleManager={this.goToMiddleManager}/>, true);
          }} />
          <Route path="/servers" component={() => {
            return wrapInViewContainer('servers', <ServersView middleManager={this.middleManager} goToSql={this.goToSql} goToTask={this.goToTask}/>, true);
          }} />
          <Route path="/sql" component={() => {
            return wrapInViewContainer('sql', <SqlView initSql={this.initSql}/>);
          }} />
          <Route component={() => {
            return wrapInViewContainer(null, <HomeView/>)
          }} />
        </Switch>
      </div>
    </HashRouter>;
  }
}