text: // @flow
  
  import React from 'react';
  import type { Dispatch } from 'redux';
  
  import { translate } from '../../../base/i18n';
  import { Icon, IconConnectionActive, IconConnectionInactive } from '../../../base/icons';
  import { JitsiParticipantConnectionStatus } from '../../../base/lib-jitsi-meet';
  import { getLocalParticipant, getParticipantById } from '../../../base/participants';
  import { Popover } from '../../../base/popover';
  import { connect } from '../../../base/redux';
  import AbstractConnectionIndicator, {
      INDICATOR_DISPLAY_THRESHOLD,
      type Props as AbstractProps,
      type State as AbstractState
  } from '../AbstractConnectionIndicator';
  
  import ConnectionIndicatorContent from './ConnectionIndicatorContent';
  
  /**
   * An array of display configurations for the connection indicator and its bars.
   * The ordering is done specifically for faster iteration to find a matching
   * configuration to the current connection strength percentage.
   *
   * @type {Object[]}
   */
  const QUALITY_TO_WIDTH: Array<Object> = [
  
      // Full (3 bars)
      {
          colorClass: 'status-high',
          percent: INDICATOR_DISPLAY_THRESHOLD,
          tip: 'connectionindicator.quality.good',
          width: '100%'
      },
  
      // 2 bars
      {
          colorClass: 'status-med',
          percent: 10,
          tip: 'connectionindicator.quality.nonoptimal',
          width: '66%'
      },
  
      // 1 bar
      {
          colorClass: 'status-low',
          percent: 0,
          tip: 'connectionindicator.quality.poor',
          width: '33%'
      }
  
      // Note: we never show 0 bars as long as there is a connection.
  ];
  
  /**
   * The type of the React {@code Component} props of {@link ConnectionIndicator}.
   */
  type Props = AbstractProps & {
  
      /**
       * The current condition of the user's connection, matching one of the
       * enumerated values in the library.
       */
      _connectionStatus: string,
  
      /**
       * Disable/enable inactive indicator.
       */
      _connectionIndicatorInactiveDisabled: boolean,
  
      /**
       * Whether or not the component should ignore setting a visibility class for
       * hiding the component when the connection quality is not strong.
       */
      alwaysVisible: boolean,
  
      /**
       * The audio SSRC of this client.
       */
      audioSsrc: number,
  
      /**
       * The Redux dispatch function.
       */
      dispatch: Dispatch<any>,
  
  
      /**
       * Whether or not clicking the indicator should display a popover for more
       * details.
       */
      enableStatsDisplay: boolean,
  
      /**
       * The font-size for the icon.
       */
      iconSize: number,
  
      /**
       * Relative to the icon from where the popover for more connection details
       * should display.
       */
      statsPopoverPosition: string,
  
      /**
       * Invoked to obtain translated strings.
       */
      t: Function,
  };
  
  /**
   * Implements a React {@link Component} which displays the current connection
   * quality percentage and has a popover to show more detailed connection stats.
   *
   * @extends {Component}
   */
  class ConnectionIndicator extends AbstractConnectionIndicator<Props, AbstractState> {
      /**
       * Initializes a new {@code ConnectionIndicator} instance.
       *
       * @param {Object} props - The read-only properties with which the new
       * instance is to be initialized.
       */
      constructor(props: Props) {
          super(props);
  
          this.state = {
              autoHideTimeout: undefined,
              showIndicator: false,
              stats: {}
          };
      }
  
      /**
       * Implements React's {@link Component#render()}.
       *
       * @inheritdoc
       * @returns {ReactElement}
       */
      render() {
          const visibilityClass = this._getVisibilityClass();
          const rootClassNames = `indicator-container ${visibilityClass}`;
  
          const colorClass = this._getConnectionColorClass();
          const indicatorContainerClassNames
              = `connection-indicator indicator ${colorClass}`;
  
          return (
              <Popover
                  className = { rootClassNames }
                  content = { <ConnectionIndicatorContent
                      inheritedStats = { this.state.stats }
                      participantId = { this.props.participantId } /> }
                  disablePopover = { !this.props.enableStatsDisplay }
                  position = { this.props.statsPopoverPosition }>
                  <div className = 'popover-trigger'>
                      <div
                          className = { indicatorContainerClassNames }
                          style = {{ fontSize: this.props.iconSize }}>
                          <div className = 'connection indicatoricon'>
                              {this._renderIcon()}
                          </div>
                      </div>
                  </div>
              </Popover>
          );
      }
  
      /**
       * Returns a CSS class that interprets the current connection status as a
       * color.
       *
       * @private
       * @returns {string}
       */
      _getConnectionColorClass() {
          const { _connectionStatus } = this.props;
          const { percent } = this.state.stats;
          const { INACTIVE, INTERRUPTED } = JitsiParticipantConnectionStatus;
  
          if (_connectionStatus === INACTIVE) {
              return 'status-other';
          } else if (_connectionStatus === INTERRUPTED) {
              return 'status-lost';
          } else if (typeof percent === 'undefined') {
              return 'status-high';
          }
  
          return this._getDisplayConfiguration(percent).colorClass;
      }
  
      /**
       * Get the icon configuration from QUALITY_TO_WIDTH which has a percentage
       * that matches or exceeds the passed in percentage. The implementation
       * assumes QUALITY_TO_WIDTH is already sorted by highest to lowest
       * percentage.
       *
       * @param {number} percent - The connection percentage, out of 100, to find
       * the closest matching configuration for.
       * @private
       * @returns {Object}
       */
      _getDisplayConfiguration(percent: number): Object {
          return QUALITY_TO_WIDTH.find(x => percent >= x.percent) || {};
      }
  
      /**
       * Returns additional class names to add to the root of the component. The
       * class names are intended to be used for hiding or showing the indicator.
       *
       * @private
       * @returns {string}
       */
      _getVisibilityClass() {
          const { _connectionStatus } = this.props;
  
          return this.state.showIndicator
              || this.props.alwaysVisible
              || _connectionStatus === JitsiParticipantConnectionStatus.INTERRUPTED
              || _connectionStatus === JitsiParticipantConnectionStatus.INACTIVE
              ? 'show-connection-indicator' : 'hide-connection-indicator';
      }
  
      /**
       * Creates a ReactElement for displaying an icon that represents the current
       * connection quality.
       *
       * @returns {ReactElement}
       */
      _renderIcon() {
          if (this.props._connectionStatus === JitsiParticipantConnectionStatus.INACTIVE) {
              if (this.props._connectionIndicatorInactiveDisabled) {
                  return null;
              }
  
              return (
                  <span className = 'connection_ninja'>
                      <Icon
                          className = 'icon-ninja'
                          size = '1.5em'
                          src = { IconConnectionInactive } />
                  </span>
              );
          }
  
          let iconWidth;
          let emptyIconWrapperClassName = 'connection_empty';
  
          if (this.props._connectionStatus
              === JitsiParticipantConnectionStatus.INTERRUPTED) {
  
              // emptyIconWrapperClassName is used by the torture tests to
              // identify lost connection status handling.
              emptyIconWrapperClassName = 'connection_lost';
              iconWidth = '0%';
          } else if (typeof this.state.stats.percent === 'undefined') {
              iconWidth = '100%';
          } else {
              const { percent } = this.state.stats;
  
              iconWidth = this._getDisplayConfiguration(percent).width;
          }
  
          return [
              <span
                  className = { emptyIconWrapperClassName }
                  key = 'icon-empty'>
                  <Icon
                      className = 'icon-gsm-bars'
                      size = '1em'
                      src = { IconConnectionActive } />
              </span>,
              <span
                  className = 'connection_full'
                  key = 'icon-full'
                  style = {{ width: iconWidth }}>
                  <Icon
                      className = 'icon-gsm-bars'
                      size = '1em'
                      src = { IconConnectionActive } />
              </span>
          ];
      }
  }
  
  /**
   * Maps part of the Redux state to the props of this component.
   *
   * @param {Object} state - The Redux state.
   * @param {Props} ownProps - The own props of the component.
   * @returns {Props}
   */
  export function _mapStateToProps(state: Object, ownProps: Props) {
      const { participantId } = ownProps;
      const participant
          = participantId ? getParticipantById(state, participantId) : getLocalParticipant(state);
  
      return {
          _connectionIndicatorInactiveDisabled:
          Boolean(state['features/base/config'].connectionIndicators?.inactiveDisabled),
          _connectionStatus: participant?.connectionStatus
      };
  }
  export default translate(connect(_mapStateToProps)(ConnectionIndicator));
  