import React, { PureComponent } from 'react';
import { FormattedTime, defineMessages, injectIntl } from 'react-intl';
import PropTypes from 'prop-types';
import UserAvatar from '/imports/ui/components/user-avatar/component';
import Icon from '/imports/ui/components/connection-status/icon/component';
import Switch from '/imports/ui/components/switch/component';
import Service from '../service';
import Styled from './styles';
import ConnectionStatusHelper from '../status-helper/container';

const NETWORK_MONITORING_INTERVAL_MS = 2000; 
const MIN_TIMEOUT = 3000;

const intlMessages = defineMessages({
  ariaTitle: {
    id: 'app.connection-status.ariaTitle',
    description: 'Connection status aria title',
  },
  title: {
    id: 'app.connection-status.title',
    description: 'Connection status title',
  },
  description: {
    id: 'app.connection-status.description',
    description: 'Connection status description',
  },
  empty: {
    id: 'app.connection-status.empty',
    description: 'Connection status empty',
  },
  more: {
    id: 'app.connection-status.more',
    description: 'More about conectivity issues',
  },
  audioLabel: {
    id: 'app.settings.audioTab.label',
    description: 'Audio label',
  },
  videoLabel: {
    id: 'app.settings.videoTab.label',
    description: 'Video label',
  },
  copy: {
    id: 'app.connection-status.copy',
    description: 'Copy network data',
  },
  copied: {
    id: 'app.connection-status.copied',
    description: 'Copied network data',
  },
  offline: {
    id: 'app.connection-status.offline',
    description: 'Offline user',
  },
  dataSaving: {
    id: 'app.settings.dataSavingTab.description',
    description: 'Description of data saving',
  },
  webcam: {
    id: 'app.settings.dataSavingTab.webcam',
    description: 'Webcam data saving switch',
  },
  screenshare: {
    id: 'app.settings.dataSavingTab.screenShare',
    description: 'Screenshare data saving switch',
  },
  on: {
    id: 'app.switch.onLabel',
    description: 'label for toggle switch on state',
  },
  off: {
    id: 'app.switch.offLabel',
    description: 'label for toggle switch off state',
  },
  no: {
    id: 'app.connection-status.no',
    description: 'No to is using turn',
  },
  yes: {
    id: 'app.connection-status.yes',
    description: 'Yes to is using turn',
  },
  usingTurn: {
    id: 'app.connection-status.usingTurn',
    description: 'User is using turn server',
  },
  jitter: {
    id: 'app.connection-status.jitter',
    description: 'Jitter buffer in ms',
  },
  lostPackets: {
    id: 'app.connection-status.lostPackets',
    description: 'Number of lost packets',
  },
  audioUploadRate: {
    id: 'app.connection-status.audioUploadRate',
    description: 'Label for audio current upload rate',
  },
  audioDownloadRate: {
    id: 'app.connection-status.audioDownloadRate',
    description: 'Label for audio current download rate',
  },
  videoUploadRate: {
    id: 'app.connection-status.videoUploadRate',
    description: 'Label for video current upload rate',
  },
  videoDownloadRate: {
    id: 'app.connection-status.videoDownloadRate',
    description: 'Label for video current download rate',
  },
  connectionStats: {
    id: 'app.connection-status.connectionStats',
    description: 'Label for Connection Stats tab',
  },
  myLogs: {
    id: 'app.connection-status.myLogs',
    description: 'Label for My Logs tab',
  },
  sessionLogs: {
    id: 'app.connection-status.sessionLogs',
    description: 'Label for Session Logs tab',
  },
  next: {
    id: 'app.connection-status.next',
    description: 'Label for the next page of the connection stats tab',
  },
  prev: {
    id: 'app.connection-status.prev',
    description: 'Label for the previous page of the connection stats tab',
  },
});

const propTypes = {
  closeModal: PropTypes.func.isRequired,
  intl: PropTypes.shape({
    formatMessage: PropTypes.func.isRequired,
  }).isRequired,
};

const isConnectionStatusEmpty = (connectionStatus) => {
  // Check if it's defined
  if (!connectionStatus) return true;

  // Check if it's an array
  if (!Array.isArray(connectionStatus)) return true;

  // Check if is empty
  if (connectionStatus.length === 0) return true;

  return false;
};

class ConnectionStatusComponent extends PureComponent {
  constructor(props) {
    super(props);

    const { intl } = this.props;

    this.help = Service.getHelp();
    this.state = {
      selectedTab: '1',
      dataPage: '1',
      dataSaving: props.dataSaving,
      hasNetworkData: false,
      networkData: {
        user: {

        },
        audio: {
          audioCurrentUploadRate: 0,
          audioCurrentDownloadRate: 0,
          jitter: 0,
          packetsLost: 0,
          transportStats: {},
        },
        video: {
          videoCurrentUploadRate: 0,
          videoCurrentDownloadRate: 0,
        },
      },
    };
    this.displaySettingsStatus = this.displaySettingsStatus.bind(this);
    this.rateInterval = null;
    this.audioUploadLabel = intl.formatMessage(intlMessages.audioUploadRate);
    this.audioDownloadLabel = intl.formatMessage(intlMessages.audioDownloadRate);
    this.videoUploadLabel = intl.formatMessage(intlMessages.videoUploadRate);
    this.videoDownloadLabel = intl.formatMessage(intlMessages.videoDownloadRate);
  }

  async componentDidMount() {
    this.startMonitoringNetwork();
  }

  componentWillUnmount() {
    Meteor.clearInterval(this.rateInterval);
  }

  handleDataSavingChange(key) {
    const { dataSaving } = this.state;
    dataSaving[key] = !dataSaving[key];
    this.setState(dataSaving);
  }

  /**
   * Start monitoring the network data.
   * @return {Promise} A Promise that resolves when process started.
   */
  async startMonitoringNetwork() {
    let previousData = await Service.getNetworkData();
    this.rateInterval = Meteor.setInterval(async () => {
      const data = await Service.getNetworkData();

      const {
        outbound: audioCurrentUploadRate,
        inbound: audioCurrentDownloadRate,
      } = Service.calculateBitsPerSecond(data.audio, previousData.audio);

      const jitter = data.audio['inbound-rtp']
        ? data.audio['inbound-rtp'].jitterBufferAverage
        : 0;

      const packetsLost = data.audio['inbound-rtp']
        ? data.audio['inbound-rtp'].packetsLost
        : 0;

      const audio = {
        audioCurrentUploadRate,
        audioCurrentDownloadRate,
        jitter,
        packetsLost,
        transportStats: data.audio.transportStats,
      };

      const {
        outbound: videoCurrentUploadRate,
        inbound: videoCurrentDownloadRate,
      } = Service.calculateBitsPerSecondFromMultipleData(data.video,
        previousData.video);

      const video = {
        videoCurrentUploadRate,
        videoCurrentDownloadRate,
      };

      const { user } = data;

      const networkData = {
        user,
        audio,
        video,
      };

      previousData = data;
      this.setState({
        networkData,
        hasNetworkData: true,
      });
    }, NETWORK_MONITORING_INTERVAL_MS);
  }

  renderEmpty() {
    const { intl } = this.props;

    return (
      <Styled.Item last data-test="connectionStatusItemEmpty">
        <Styled.Left>
          <Styled.FullName>
            <Styled.Text>
              {intl.formatMessage(intlMessages.empty)}
            </Styled.Text>
          </Styled.FullName>
        </Styled.Left>
      </Styled.Item>
    );
  }

  displaySettingsStatus(status) {
    const { intl } = this.props;

    return (
      <Styled.ToggleLabel>
        {status ? intl.formatMessage(intlMessages.on)
          : intl.formatMessage(intlMessages.off)}
      </Styled.ToggleLabel>
    );
  }

  /**
   * Copy network data to clipboard
   * @param  {Object}  e              Event object from click event
   * @return {Promise}   A Promise that is resolved after data is copied.
   *
   *
   */
  async copyNetworkData(e) {
    const { intl } = this.props;
    const {
      networkData,
      hasNetworkData,
    } = this.state;

    if (!hasNetworkData) return;

    const { target: copyButton } = e;

    copyButton.innerHTML = intl.formatMessage(intlMessages.copied);

    const data = JSON.stringify(networkData, null, 2);

    await navigator.clipboard.writeText(data);

    this.copyNetworkDataTimeout = setTimeout(() => {
      copyButton.innerHTML = intl.formatMessage(intlMessages.copy);
    }, MIN_TIMEOUT);
  }

  renderConnections() {
    const {
      connectionStatus,
      intl,
    } = this.props;

    const { selectedTab } = this.state;

    if (isConnectionStatusEmpty(connectionStatus)) return this.renderEmpty();

    let connections = connectionStatus;
    if (selectedTab === '2') {
      connections = connections.filter(conn => conn.you);
      if (isConnectionStatusEmpty(connections)) return this.renderEmpty();
    }

    return connections.map((conn, index) => {
      const dateTime = new Date(conn.timestamp);

      return (
        <Styled.Item
          key={index}
          last={(index + 1) === connections.length}
          data-test="connectionStatusItemUser"
        >
          <Styled.Left>
            <Styled.Avatar>
              <UserAvatar
                you={conn.you}
                avatar={conn.avatar}
                moderator={conn.moderator}
                color={conn.color}
              >
                {conn.name.toLowerCase().slice(0, 2)}
              </UserAvatar>
            </Styled.Avatar>

            <Styled.Name>
              <Styled.Text
                offline={conn.offline}
                data-test={conn.offline ? "offlineUser" : null}
              >
                {conn.name}
                {conn.offline ? ` (${intl.formatMessage(intlMessages.offline)})` : null}
              </Styled.Text>
            </Styled.Name>
            <Styled.Status aria-label={`${intl.formatMessage(intlMessages.title)} ${conn.level}`}>
              <Styled.Icon>
                <Icon level={conn.level} />
              </Styled.Icon>
            </Styled.Status>
          </Styled.Left>
          <Styled.Right>
            <Styled.Time>
              <time dateTime={dateTime}>
                <FormattedTime value={dateTime} />
              </time>
            </Styled.Time>
          </Styled.Right>
        </Styled.Item>
      );
    });
  }

  renderDataSaving() {
    const {
      intl,
      dataSaving,
    } = this.props;

    const {
      viewParticipantsWebcams,
      viewScreenshare,
    } = dataSaving;

    return (
      <Styled.DataSaving>
        <Styled.Description>
          {intl.formatMessage(intlMessages.dataSaving)}
        </Styled.Description>

        <Styled.Row>
          <Styled.Col aria-hidden="true">
            <Styled.FormElement>
              <Styled.Label>
                {intl.formatMessage(intlMessages.webcam)}
              </Styled.Label>
            </Styled.FormElement>
          </Styled.Col>
          <Styled.Col>
            <Styled.FormElementRight>
              {this.displaySettingsStatus(viewParticipantsWebcams)}
              <Switch
                icons={false}
                defaultChecked={viewParticipantsWebcams}
                onChange={() => this.handleDataSavingChange('viewParticipantsWebcams')}
                ariaLabelledBy="webcam"
                ariaLabel={intl.formatMessage(intlMessages.webcam)}
                data-test="dataSavingWebcams"
                showToggleLabel={false}
              />
            </Styled.FormElementRight>
          </Styled.Col>
        </Styled.Row>

        <Styled.Row>
          <Styled.Col aria-hidden="true">
            <Styled.FormElement>
              <Styled.Label>
                {intl.formatMessage(intlMessages.screenshare)}
              </Styled.Label>
            </Styled.FormElement>
          </Styled.Col>
          <Styled.Col>
            <Styled.FormElementRight>
              {this.displaySettingsStatus(viewScreenshare)}
              <Switch
                icons={false}
                defaultChecked={viewScreenshare}
                onChange={() => this.handleDataSavingChange('viewScreenshare')}
                ariaLabelledBy="screenshare"
                ariaLabel={intl.formatMessage(intlMessages.screenshare)}
                data-test="dataSavingScreenshare"
                showToggleLabel={false}
              />
            </Styled.FormElementRight>
          </Styled.Col>
        </Styled.Row>
      </Styled.DataSaving>
    );
  }

  /**
   * Render network data , containing information abount current upload and
   * download rates
   * @return {Object} The component to be renderized.
   */
  renderNetworkData() {
    const { enableNetworkStats } = Meteor.settings.public.app;

    if (!enableNetworkStats) {
      return null;
    }

    const {
      audioUploadLabel,
      audioDownloadLabel,
      videoUploadLabel,
      videoDownloadLabel,
    } = this;

    const { intl, closeModal } = this.props;

    const { networkData, dataSaving, dataPage } = this.state;

    const {
      audioCurrentUploadRate,
      audioCurrentDownloadRate,
      jitter,
      packetsLost,
      transportStats,
    } = networkData.audio;

    const {
      videoCurrentUploadRate,
      videoCurrentDownloadRate,
    } = networkData.video;

    let isUsingTurn = '--';

    if (transportStats) {
      switch (transportStats.isUsingTurn) {
        case true:
          isUsingTurn = intl.formatMessage(intlMessages.yes);
          break;
        case false:
          isUsingTurn = intl.formatMessage(intlMessages.no);
          break;
        default:
          break;
      }
    }

    function handlePaginationClick(action) {
      if (action === 'next') {
        this.setState({ dataPage: '2' });
      }
      else {
        this.setState({ dataPage: '1' });
      }
    }

    return (
      <Styled.NetworkDataContainer>
        <Styled.Prev>
          <Styled.ButtonLeft
            role="button"
            disabled={dataPage === '1'}
            aria-label={`${intl.formatMessage(intlMessages.prev)} ${intl.formatMessage(intlMessages.ariaTitle)}`}
            onClick={handlePaginationClick.bind(this, 'prev')}
          >
            <Styled.Chevron
              xmlns="http://www.w3.org/2000/svg"
              fill="none"
              viewBox="0 0 24 24"
              stroke="currentColor"
            >
              <path
                strokeLinecap="round"
                strokeLinejoin="round"
                strokeWidth={2}
                d="M15 19l-7-7 7-7"
              />
            </Styled.Chevron>
          </Styled.ButtonLeft>
        </Styled.Prev>
        <Styled.Helper page={dataPage}>
          <ConnectionStatusHelper closeModal={() => closeModal(dataSaving, intl)} />
        </Styled.Helper>
        <Styled.NetworkDataContent page={dataPage}>
          <Styled.DataColumn>
            <Styled.NetworkData>
              <div>{`${audioUploadLabel}`}</div>
              <div>{`${audioCurrentUploadRate}k ↑`}</div>
            </Styled.NetworkData>
            <Styled.NetworkData>
              <div>{`${videoUploadLabel}`}</div>
              <div>{`${videoCurrentUploadRate}k ↑`}</div>
            </Styled.NetworkData>
            <Styled.NetworkData>
              <div>{`${intl.formatMessage(intlMessages.jitter)}`}</div>
              <div>{`${jitter} ms`}</div>
            </Styled.NetworkData>
            <Styled.NetworkData>
              <div>{`${intl.formatMessage(intlMessages.usingTurn)}`}</div>
              <div>{`${isUsingTurn}`}</div>
            </Styled.NetworkData>
          </Styled.DataColumn>

          <Styled.DataColumn>
            <Styled.NetworkData>
              <div>{`${audioDownloadLabel}`}</div>
              <div>{`${audioCurrentDownloadRate}k ↓`}</div>
            </Styled.NetworkData>
            <Styled.NetworkData>
              <div>{`${videoDownloadLabel}`}</div>
              <div>{`${videoCurrentDownloadRate}k ↓`}</div>
            </Styled.NetworkData>
            <Styled.NetworkData>
              <div>{`${intl.formatMessage(intlMessages.lostPackets)}`}</div>
              <div>{`${packetsLost}`}</div>
            </Styled.NetworkData>
            <Styled.NetworkData invisible>
              <div>Content Hidden</div>
              <div>0</div>
            </Styled.NetworkData>
          </Styled.DataColumn>
        </Styled.NetworkDataContent>
        <Styled.Next>
          <Styled.ButtonRight
            role="button"
            disabled={dataPage === '2'}
            aria-label={`${intl.formatMessage(intlMessages.next)} ${intl.formatMessage(intlMessages.ariaTitle)}`}
            onClick={handlePaginationClick.bind(this, 'next')}
          >
            <Styled.Chevron
              xmlns="http://www.w3.org/2000/svg"
              fill="none"
              viewBox="0 0 24 24"
              stroke="currentColor"
            >
              <path
                strokeLinecap="round"
                strokeLinejoin="round"
                strokeWidth={2}
                d="M9 5l7 7-7 7"
              />
            </Styled.Chevron>
          </Styled.ButtonRight>
        </Styled.Next>
      </Styled.NetworkDataContainer>
    );
  }

  /**
   * Renders the clipboard's copy button, for network stats.
   * @return {Object} - The component to be renderized
   */
  renderCopyDataButton() {
    const { enableCopyNetworkStatsButton } = Meteor.settings.public.app;

    if (!enableCopyNetworkStatsButton) {
      return null;
    }

    const { intl } = this.props;

    const { hasNetworkData } = this.state;
    return (
      <Styled.CopyContainer aria-live="polite">
        <Styled.Copy
          disabled={!hasNetworkData}
          role="button"
          onClick={this.copyNetworkData.bind(this)}
          onKeyPress={this.copyNetworkData.bind(this)}
          tabIndex={0}
        >
          {intl.formatMessage(intlMessages.copy)}
        </Styled.Copy>
      </Styled.CopyContainer>
    );
  }

  /**
   * The navigation bar.
   * @returns {Object} The component to be renderized.
  */
  renderNavigation() {
    const { intl } = this.props;

    const handleTabClick = (event) => {
      const activeTabElement = document.querySelector('.activeConnectionStatusTab');
      const { target } = event;

      if (activeTabElement) {
        activeTabElement.classList.remove('activeConnectionStatusTab');
      }

      target.classList.add('activeConnectionStatusTab');
      this.setState({
        selectedTab: target.dataset.tab,
      });
    }

    return (
      <Styled.Navigation>
        <div
          data-tab="1"
          className="activeConnectionStatusTab"
          onClick={handleTabClick}
          onKeyDown={handleTabClick}
          role="button"
        >
          {intl.formatMessage(intlMessages.connectionStats)}
        </div>
        <div
          data-tab="2"
          onClick={handleTabClick}
          onKeyDown={handleTabClick}
          role="button"
        >
          {intl.formatMessage(intlMessages.myLogs)}
        </div>
        {Service.isModerator()
          && (
            <div
              data-tab="3"
              onClick={handleTabClick}
              onKeyDown={handleTabClick}
              role="button"
            >
              {intl.formatMessage(intlMessages.sessionLogs)}
            </div>
          )
        }
      </Styled.Navigation>
    );
  }

  render() {
    const {
      closeModal,
      intl,
    } = this.props;

    const { dataSaving, selectedTab } = this.state;

    return (
      <Styled.ConnectionStatusModal
        onRequestClose={() => closeModal(dataSaving, intl)}
        hideBorder
        contentLabel={intl.formatMessage(intlMessages.ariaTitle)}
      >
        <Styled.Container>
          <Styled.Header>
            <Styled.Title>
              {intl.formatMessage(intlMessages.title)}
            </Styled.Title>
          </Styled.Header>
          {this.renderNavigation()}
          <Styled.Main>
            <Styled.Body>
              {selectedTab === '1'
                ? this.renderNetworkData()
                : this.renderConnections()
              }
            </Styled.Body>
            {selectedTab === '1' &&
              this.renderCopyDataButton()
            }
          </Styled.Main>
        </Styled.Container>
      </Styled.ConnectionStatusModal>
    );
  }
}

ConnectionStatusComponent.propTypes = propTypes;

export default injectIntl(ConnectionStatusComponent);