/*-
 * ============LICENSE_START=======================================================
 * ONAP CLAMP
 * ================================================================================
 * Copyright (C) 2019, 2021 AT&T Intellectual Property. All rights
 *                             reserved.
 * ================================================================================
 * 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.
 * ============LICENSE_END============================================
 * ===================================================================
 *
 */

import React from 'react';
import styled from 'styled-components';
import MenuBar from './components/menu/MenuBar';
import Navbar from 'react-bootstrap/Navbar';
import logo from './logo.png';
import { GlobalClampStyle } from './theme/globalStyle.js';
import OnapConstants from './utils/OnapConstants';

import SvgGenerator from './components/loop_viewer/svg/SvgGenerator';
import LoopLogs from './components/loop_viewer/logs/LoopLogs';
import LoopStatus from './components/loop_viewer/status/LoopStatus';
import UserService from './api/UserService';
import LoopCache from './api/LoopCache';
import LoopActionService from './api/LoopActionService';

import { Route } from 'react-router-dom'
import CreateLoopModal from './components/dialogs/Loop/CreateLoopModal';
import OpenLoopModal from './components/dialogs/Loop/OpenLoopModal';
import ModifyLoopModal from './components/dialogs/Loop/ModifyLoopModal';
import PolicyModal from './components/dialogs/Policy/PolicyModal';
import ViewAllPolicies from './components/dialogs/Policy/ViewAllPolicies';
import LoopPropertiesModal from './components/dialogs/Loop/LoopPropertiesModal';
import UserInfoModal from './components/dialogs/UserInfoModal';
import LoopService from './api/LoopService';
import ViewLoopTemplatesModal from './components/dialogs/Tosca/ViewLoopTemplatesModal';
import ManageDictionaries from './components/dialogs/ManageDictionaries/ManageDictionaries';
import PerformAction from './components/dialogs/PerformActions';
import RefreshStatus from './components/dialogs/RefreshStatus';
import DeployLoopModal from './components/dialogs/Loop/DeployLoopModal';
import Alert from 'react-bootstrap/Alert';
import Spinner from 'react-bootstrap/Spinner';

import { Link } from 'react-router-dom';

const StyledMainDiv = styled.div`
  background-color: ${ props => props.theme.backgroundColor };
`

const StyledSpinnerDiv = styled.div`
  justify-content: center !important;
  display: flex !important;
`;

const ProjectNameStyled = styled.a`
  vertical-align: middle;
  padding-left: 30px;
  font-size: 36px;
  font-weight: bold;
`

const StyledRouterLink = styled(Link)`
  color: ${ props => props.theme.menuFontColor };
  background-color: ${ props => props.theme.backgroundColor };
`

const StyledLoginInfo = styled.a`
  color: ${ props => props.theme.menuFontColor };
  background-color: ${ props => props.theme.backgroundColor };
`

const LoopViewDivStyled = styled.div`
  height: 100%;
  overflow: hidden;
  margin-left: 10px;
  margin-right: 10px;
  margin-bottom: 10px;
  color: ${ props => props.theme.loopViewerFontColor };
  background-color: ${ props => props.theme.loopViewerBackgroundColor };
  border: 1px solid transparent;
  border-color: ${ props => props.theme.loopViewerHeaderBackgroundColor };
`

const LoopViewHeaderDivStyled = styled.div`
  background-color: ${ props => props.theme.loopViewerHeaderBackgroundColor };
  padding: 10px 10px;
  color: ${ props => props.theme.loopViewerHeaderFontColor };
`

const LoopViewBodyDivStyled = styled.div`
  background-color: ${ props => (props.theme.loopViewerBackgroundColor) };
  padding: 10px 10px;
  color: ${ props => (props.theme.loopViewerHeaderFontColor) };
  height: 95%;
`

export default class LoopUI extends React.Component {

  state = {
    userName: null,
    loopName: OnapConstants.defaultLoopName,
    loopCache: new LoopCache({}),
    showSucAlert: false,
    showFailAlert: false,
    busyLoadingCount: 0
  };

  constructor() {
    super();
    this.getUser = this.getUser.bind(this);
    this.updateLoopCache = this.updateLoopCache.bind(this);
    this.loadLoop = this.loadLoop.bind(this);
    this.closeLoop = this.closeLoop.bind(this);
    this.showSucAlert = this.showSucAlert.bind(this);
    this.showFailAlert = this.showFailAlert.bind(this);
    this.disableAlert = this.disableAlert.bind(this);
    this.setBusyLoading = this.setBusyLoading.bind(this);
    this.clearBusyLoading = this.clearBusyLoading.bind(this);
    this.isBusyLoading = this.isBusyLoading.bind(this);
    this.renderGlobalStyle = this.renderGlobalStyle.bind(this);
    this.renderSvg = this.renderSvg.bind(this);
  }

  componentWillMount() {
    this.getUser();
  }

  getUser() {
    UserService.login().then(user => {
      this.setState({ userName: user })
    });
  }

  renderMenuNavBar() {
    return (
      <MenuBar loopName={ this.state.loopName }/>
    );
  }

  renderUserLoggedNavBar() {
    return (
      <Navbar.Text>
        <StyledLoginInfo>Signed in as: </StyledLoginInfo>
        <StyledRouterLink to="/userInfo">{ this.state.userName }</StyledRouterLink>
      </Navbar.Text>
    );
  }

  renderLogoNavBar() {
    return (
      <Navbar.Brand>
        <img height="50px" width="234px" src={ logo } alt=""/>
        <ProjectNameStyled>CLAMP</ProjectNameStyled>
      </Navbar.Brand>
    );
  }

  renderAlertBar() {
    return (
      <div>
        <Alert variant="success" show={ this.state.showSucAlert } onClose={ this.disableAlert } dismissible>
          { this.state.showMessage }
        </Alert>
        <Alert variant="danger" show={ this.state.showFailAlert } onClose={ this.disableAlert } dismissible>
          { this.state.showMessage }
        </Alert>
      </div>
    );
  }

  renderNavBar() {
    return (
      <Navbar>
        { this.renderLogoNavBar() }
        <Navbar.Toggle aria-controls="responsive-navbar-nav"/>
        { this.renderMenuNavBar() }
        { this.renderUserLoggedNavBar() }
      </Navbar>
    );
  }

  renderLoopViewHeader() {
    return (
      <LoopViewHeaderDivStyled>
        Loop Viewer - { this.state.loopName } - ({ this.state.loopCache.getTemplateName() })
      </LoopViewHeaderDivStyled>
    );
  }

  renderSvg() {
    return (
      <SvgGenerator loopCache={ this.state.loopCache } clickable={ true } generatedFrom={ SvgGenerator.GENERATED_FROM_INSTANCE } isBusyLoading={ this.isBusyLoading }/>
    )
  }

  renderLoopViewBody() {
    return (
      <LoopViewBodyDivStyled>
        { this.renderSvg() }
        <LoopStatus loopCache={ this.state.loopCache }/>
        <LoopLogs loopCache={ this.state.loopCache }/>
      </LoopViewBodyDivStyled>
    );
  }

  getLoopCache() {
    return this.state.loopCache;

  }

  renderLoopViewer() {
    return (
      <LoopViewDivStyled>
        { this.renderLoopViewHeader() }
        { this.renderLoopViewBody() }
      </LoopViewDivStyled>
    );
  }

  updateLoopCache(loopJson) {

    // If call with an empty object for loopJson, this is a reset to empty
    // from someplace like PerformActions for the case where we are "deleting"
    // a Control Loop model. Set the loopName to the default.

    if (loopJson === null) {
      this.setState({ loopName: OnapConstants.defaultLoopName });
      this.setState({ loopCache: new LoopCache({}) });
    } else {
      this.setState({ loopCache: new LoopCache(loopJson) });
      this.setState({ loopName: this.state.loopCache.getLoopName() });
    }
    console.info(this.state.loopName + " loop loaded successfully");
  }

  showSucAlert(message) {
    this.setState({ showSucAlert: true, showMessage: message });
  }

  showFailAlert(message) {
    this.setState({ showFailAlert: true, showMessage: message });
  }

  disableAlert() {
    this.setState({ showSucAlert: false, showFailAlert: false });
  }

  loadLoop(loopName) {
    this.setBusyLoading();
    LoopService.getLoop(loopName).then(loop => {
      console.debug("Updating loopCache");
      LoopActionService.refreshStatus(loopName).then(data => {
        this.updateLoopCache(data);
        this.clearBusyLoading();
        this.props.history.push('/');
      })
        .catch(error => {
          this.updateLoopCache(loop);
          this.clearBusyLoading();
          this.props.history.push('/');
        });
    });
  }

  setBusyLoading() {
    this.setState((state, props) => ({ busyLoadingCount: ++state.busyLoadingCount }));
  }

  clearBusyLoading() {
    this.setState((state, props) => ({ busyLoadingCount: --state.busyLoadingCount }));
  }

  isBusyLoading() {
    if (this.state.busyLoadingCount === 0) {
      return false;
    } else {
      return true;
    }
  }

  closeLoop() {
    this.setState({ loopCache: new LoopCache({}), loopName: OnapConstants.defaultLoopName });
    this.props.history.push('/');
  }

  renderRoutes() {
    return (
      <React.Fragment>
        <Route path="/viewLoopTemplatesModal" render={ (routeProps) => (<ViewLoopTemplatesModal { ...routeProps } />) }/>
        <Route path="/manageDictionaries" render={ (routeProps) => (<ManageDictionaries { ...routeProps } />) }/>
        <Route path="/viewAllPolicies" render={ (routeProps) => (<ViewAllPolicies { ...routeProps } />) }/>
        <Route path="/policyModal/:policyInstanceType/:policyName" render={ (routeProps) => (<PolicyModal { ...routeProps }
                                                                                                          loopCache={ this.getLoopCache() }
                                                                                                          loadLoopFunction={ this.loadLoop }/>) }
        />
        <Route path="/createLoop" render={ (routeProps) => (<CreateLoopModal { ...routeProps }
                                                                             loadLoopFunction={ this.loadLoop }/>) }
        />
        <Route path="/openLoop" render={ (routeProps) => (<OpenLoopModal { ...routeProps }
                                                                         loadLoopFunction={ this.loadLoop }/>) }
        />
        <Route path="/loopProperties" render={ (routeProps) => (<LoopPropertiesModal { ...routeProps }
                                                                                     loopCache={ this.getLoopCache() }
                                                                                     loadLoopFunction={ this.loadLoop }/>) }
        />
        <Route path="/modifyLoop" render={ (routeProps) => (<ModifyLoopModal { ...routeProps }
                                                                             loopCache={ this.getLoopCache() }
                                                                             loadLoopFunction={ this.loadLoop }/>) }
        />

        <Route path="/userInfo" render={ (routeProps) => (<UserInfoModal { ...routeProps } />) }/>
        <Route path="/closeLoop" render={ this.closeLoop }/>

        <Route path="/submit" render={ (routeProps) => (<PerformAction { ...routeProps }
                                                                       loopAction="submit"
                                                                       loopCache={ this.getLoopCache() }
                                                                       updateLoopFunction={ this.updateLoopCache }
                                                                       showSucAlert={ this.showSucAlert }
                                                                       showFailAlert={ this.showFailAlert }
                                                                       setBusyLoading={ this.setBusyLoading }
                                                                       clearBusyLoading={ this.clearBusyLoading }/>) }
        />
        <Route path="/stop" render={ (routeProps) => (<PerformAction { ...routeProps }
                                                                     loopAction="stop"
                                                                     loopCache={ this.getLoopCache() }
                                                                     updateLoopFunction={ this.updateLoopCache }
                                                                     showSucAlert={ this.showSucAlert }
                                                                     showFailAlert={ this.showFailAlert }
                                                                     setBusyLoading={ this.setBusyLoading }
                                                                     clearBusyLoading={ this.clearBusyLoading }/>) }
        />
        <Route path="/restart" render={ (routeProps) => (<PerformAction { ...routeProps }
                                                                        loopAction="restart"
                                                                        loopCache={ this.getLoopCache() }
                                                                        updateLoopFunction={ this.updateLoopCache }
                                                                        showSucAlert={ this.showSucAlert }
                                                                        showFailAlert={ this.showFailAlert }
                                                                        setBusyLoading={ this.setBusyLoading }
                                                                        clearBusyLoading={ this.clearBusyLoading }/>) }
        />
        <Route path="/delete" render={ (routeProps) => (<PerformAction { ...routeProps }
                                                                       loopAction="delete"
                                                                       loopCache={ this.getLoopCache() }
                                                                       updateLoopFunction={ this.updateLoopCache }
                                                                       showSucAlert={ this.showSucAlert }
                                                                       showFailAlert={ this.showFailAlert }
                                                                       setBusyLoading={ this.setBusyLoading }
                                                                       clearBusyLoading={ this.clearBusyLoading }/>) }
        />
        <Route path="/undeploy" render={ (routeProps) => (<PerformAction { ...routeProps }
                                                                         loopAction="undeploy"
                                                                         loopCache={ this.getLoopCache() }
                                                                         updateLoopFunction={ this.updateLoopCache }
                                                                         showSucAlert={ this.showSucAlert }
                                                                         showFailAlert={ this.showFailAlert }
                                                                         setBusyLoading={ this.setBusyLoading }
                                                                         clearBusyLoading={ this.clearBusyLoading }/>) }
        />
        <Route path="/deploy" render={ (routeProps) => (<DeployLoopModal { ...routeProps }
                                                                         loopCache={ this.getLoopCache() }
                                                                         updateLoopFunction={ this.updateLoopCache }
                                                                         showSucAlert={ this.showSucAlert }
                                                                         showFailAlert={ this.showFailAlert }/>) }
        />
        <Route path="/refreshStatus" render={ (routeProps) => (<RefreshStatus { ...routeProps }
                                                                              loopCache={ this.getLoopCache() }
                                                                              updateLoopFunction={ this.updateLoopCache }
                                                                              showSucAlert={ this.showSucAlert }
                                                                              showFailAlert={ this.showFailAlert }/>) }
        />
      </React.Fragment>
    );
  }

  renderGlobalStyle() {
    return (
      <GlobalClampStyle/>
    );
  };


  renderSpinner() {
    if (this.isBusyLoading()) {
      return (
        <StyledSpinnerDiv>
          <Spinner animation="border" role="status">
            <span className="sr-only">Loading...</span>
          </Spinner>
        </StyledSpinnerDiv>
      );
    } else {
      return (<div></div>);
    }
  }

  render() {
    return (
      <StyledMainDiv id="main_div">
        { this.renderGlobalStyle() }
        { this.renderRoutes() }
        { this.renderSpinner() }
        { this.renderAlertBar() }
        { this.renderNavBar() }
        { this.renderLoopViewer() }
      </StyledMainDiv>
    );
  }
}