// @flow

import React, { Component } from 'react';

import { isToolbarButtonEnabled } from '../../base/config/functions.web';
import { openDialog } from '../../base/dialog';
import { translate } from '../../base/i18n';
import {
    IconCloseCircle,
    IconCrown,
    IconMessage,
    IconMicDisabled,
    IconMuteEveryoneElse,
    IconVideoOff
} from '../../base/icons';
import {
    getParticipantByIdOrUndefined,
    isLocalParticipantModerator,
    isParticipantModerator
} from '../../base/participants';
import { connect } from '../../base/redux';
import { isParticipantAudioMuted, isParticipantVideoMuted } from '../../base/tracks';
import { openChat } from '../../chat/actions';
import { GrantModeratorDialog, KickRemoteParticipantDialog, MuteEveryoneDialog } from '../../video-menu';
import MuteRemoteParticipantsVideoDialog from '../../video-menu/components/web/MuteRemoteParticipantsVideoDialog';
import { getComputedOuterHeight } from '../functions';

import {
    ContextMenu,
    ContextMenuIcon,
    ContextMenuItem,
    ContextMenuItemGroup,
    ignoredChildClassName
} from './styled';

type Props = {

    /**
     * True if the local participant is moderator and false otherwise.
     */
    _isLocalModerator: boolean,

    /**
     * True if the chat button is enabled and false otherwise.
     */
    _isChatButtonEnabled: boolean,

    /**
     * True if the participant is moderator and false otherwise.
     */
    _isParticipantModerator: boolean,

    /**
     * True if the participant is video muted and false otherwise.
     */
    _isParticipantVideoMuted: boolean,

    /**
     * True if the participant is audio muted and false otherwise.
     */
    _isParticipantAudioMuted: boolean,

    /**
     * Participant reference
     */
    _participant: Object,

    /**
     * The dispatch function from redux.
     */
    dispatch: Function,

    /**
     * Callback used to open a confirmation dialog for audio muting.
     */
    muteAudio: Function,

    /**
     * Target elements against which positioning calculations are made
     */
    offsetTarget: HTMLElement,

    /**
     * Callback for the mouse entering the component
     */
    onEnter: Function,

    /**
     * Callback for the mouse leaving the component
     */
    onLeave: Function,

    /**
     * Callback for making a selection in the menu
     */
    onSelect: Function,

    /**
     * The ID of the participant.
     */
    participantID: string,

    /**
     * The translate function.
     */
    t: Function
};

type State = {

    /**
     * If true the context menu will be hidden.
     */
    isHidden: boolean
};

/**
 * Implements the MeetingParticipantContextMenu component.
 */
class MeetingParticipantContextMenu extends Component<Props, State> {

    /**
     * Reference to the context menu container div.
     */
    _containerRef: Object;

    /**
     * Creates new instance of MeetingParticipantContextMenu.
     *
     * @param {Props} props - The props.
     */
    constructor(props: Props) {
        super(props);

        this.state = {
            isHidden: true
        };

        this._containerRef = React.createRef();

        this._onGrantModerator = this._onGrantModerator.bind(this);
        this._onKick = this._onKick.bind(this);
        this._onMuteEveryoneElse = this._onMuteEveryoneElse.bind(this);
        this._onMuteVideo = this._onMuteVideo.bind(this);
        this._onSendPrivateMessage = this._onSendPrivateMessage.bind(this);
        this._position = this._position.bind(this);
    }

    _onGrantModerator: () => void;

    /**
     * Grant moderator permissions.
     *
     * @returns {void}
     */
    _onGrantModerator() {
        const { _participant, dispatch } = this.props;

        dispatch(openDialog(GrantModeratorDialog, {
            participantID: _participant?.id
        }));
    }

    _onKick: () => void;

    /**
     * Kicks the participant.
     *
     * @returns {void}
     */
    _onKick() {
        const { _participant, dispatch } = this.props;

        dispatch(openDialog(KickRemoteParticipantDialog, {
            participantID: _participant?.id
        }));
    }

    _onMuteEveryoneElse: () => void;

    /**
     * Mutes everyone else.
     *
     * @returns {void}
     */
    _onMuteEveryoneElse() {
        const { _participant, dispatch } = this.props;

        dispatch(openDialog(MuteEveryoneDialog, {
            exclude: [ _participant?.id ]
        }));
    }

    _onMuteVideo: () => void;

    /**
     * Mutes the video of the selected participant.
     *
     * @returns {void}
     */
    _onMuteVideo() {
        const { _participant, dispatch } = this.props;

        dispatch(openDialog(MuteRemoteParticipantsVideoDialog, {
            participantID: _participant?.id
        }));
    }

    _onSendPrivateMessage: () => void;

    /**
     * Sends private message.
     *
     * @returns {void}
     */
    _onSendPrivateMessage() {
        const { _participant, dispatch } = this.props;

        dispatch(openChat(_participant));
    }

    _position: () => void;

    /**
     * Positions the context menu.
     *
     * @returns {void}
     */
    _position() {
        const { _participant, offsetTarget } = this.props;

        if (_participant
            && this._containerRef.current
            && offsetTarget?.offsetParent
            && offsetTarget.offsetParent instanceof HTMLElement
        ) {
            const { current: container } = this._containerRef;
            const { offsetTop, offsetParent: { offsetHeight, scrollTop } } = offsetTarget;
            const outerHeight = getComputedOuterHeight(container);

            container.style.top = offsetTop + outerHeight > offsetHeight + scrollTop
                ? offsetTop - outerHeight
                : offsetTop;

            this.setState({ isHidden: false });
        } else {
            this.setState({ isHidden: true });
        }
    }

    /**
     * Implements React Component's componentDidMount.
     *
     * @inheritdoc
     * @returns {void}
     */
    componentDidMount() {
        this._position();
    }

    /**
     * Implements React Component's componentDidUpdate.
     *
     * @inheritdoc
     */
    componentDidUpdate(prevProps: Props) {
        if (prevProps.offsetTarget !== this.props.offsetTarget || prevProps._participant !== this.props._participant) {
            this._position();
        }
    }

    /**
     * Implements React's {@link Component#render()}.
     *
     * @inheritdoc
     * @returns {ReactElement}
     */
    render() {
        const {
            _isLocalModerator,
            _isChatButtonEnabled,
            _isParticipantModerator,
            _isParticipantVideoMuted,
            _isParticipantAudioMuted,
            _participant,
            onEnter,
            onLeave,
            onSelect,
            muteAudio,
            t
        } = this.props;

        if (!_participant) {
            return null;
        }

        return (
            <ContextMenu
                className = { ignoredChildClassName }
                innerRef = { this._containerRef }
                isHidden = { this.state.isHidden }
                onClick = { onSelect }
                onMouseEnter = { onEnter }
                onMouseLeave = { onLeave }>
                <ContextMenuItemGroup>
                    {
                        _isLocalModerator && (
                            <>
                                {
                                    !_isParticipantAudioMuted
                                        && <ContextMenuItem onClick = { muteAudio(_participant) }>
                                            <ContextMenuIcon src = { IconMicDisabled } />
                                            <span>{t('dialog.muteParticipantButton')}</span>
                                        </ContextMenuItem>
                                }

                                <ContextMenuItem onClick = { this._onMuteEveryoneElse }>
                                    <ContextMenuIcon src = { IconMuteEveryoneElse } />
                                    <span>{t('toolbar.accessibilityLabel.muteEveryoneElse')}</span>
                                </ContextMenuItem>
                            </>
                        )
                    }

                    {
                        _isLocalModerator && (
                            _isParticipantVideoMuted || (
                                <ContextMenuItem onClick = { this._onMuteVideo }>
                                    <ContextMenuIcon src = { IconVideoOff } />
                                    <span>{t('participantsPane.actions.stopVideo')}</span>
                                </ContextMenuItem>
                            )
                        )
                    }
                </ContextMenuItemGroup>

                <ContextMenuItemGroup>
                    {
                        _isLocalModerator && (
                            <>
                                {
                                    !_isParticipantModerator && (
                                        <ContextMenuItem onClick = { this._onGrantModerator }>
                                            <ContextMenuIcon src = { IconCrown } />
                                            <span>{t('toolbar.accessibilityLabel.grantModerator')}</span>
                                        </ContextMenuItem>
                                    )
                                }
                                <ContextMenuItem onClick = { this._onKick }>
                                    <ContextMenuIcon src = { IconCloseCircle } />
                                    <span>{ t('videothumbnail.kick') }</span>
                                </ContextMenuItem>
                            </>
                        )
                    }
                    {
                        _isChatButtonEnabled && (
                            <ContextMenuItem onClick = { this._onSendPrivateMessage }>
                                <ContextMenuIcon src = { IconMessage } />
                                <span>{t('toolbar.accessibilityLabel.privateMessage')}</span>
                            </ContextMenuItem>
                        )
                    }
                </ContextMenuItemGroup>
            </ContextMenu>
        );
    }
}

/**
 * Maps (parts of) the redux state to the associated props for this component.
 *
 * @param {Object} state - The Redux state.
 * @param {Object} ownProps - The own props of the component.
 * @private
 * @returns {Props}
 */
function _mapStateToProps(state, ownProps): Object {
    const { participantID } = ownProps;

    const participant = getParticipantByIdOrUndefined(state, participantID);

    const _isLocalModerator = isLocalParticipantModerator(state);
    const _isChatButtonEnabled = isToolbarButtonEnabled('chat', state);
    const _isParticipantVideoMuted = isParticipantVideoMuted(participant, state);
    const _isParticipantAudioMuted = isParticipantAudioMuted(participant, state);
    const _isParticipantModerator = isParticipantModerator(participant);

    return {
        _isLocalModerator,
        _isChatButtonEnabled,
        _isParticipantModerator,
        _isParticipantVideoMuted,
        _isParticipantAudioMuted,
        _participant: participant
    };
}

export default translate(connect(_mapStateToProps)(MeetingParticipantContextMenu));