// @ts-expect-error
import { randomInt } from '@jitsi/js-utils/random';
import React, { Component } from 'react';
import { WithTranslation } from 'react-i18next';

import { createPageReloadScheduledEvent } from '../../../analytics/AnalyticsEvents';
import { sendAnalytics } from '../../../analytics/functions';
import { reloadNow } from '../../../app/actions.web';
import { IReduxState, IStore } from '../../../app/types';
import {
    isFatalJitsiConferenceError,
    isFatalJitsiConnectionError
} from '../../../base/lib-jitsi-meet/functions.web';
import logger from '../../logger';

import ReloadButton from './ReloadButton';

/**
 * The type of the React {@code Component} props of
 * {@link AbstractPageReloadOverlay}.
 */
export interface IProps extends WithTranslation {

    /**
     * The details is an object containing more information about the connection
     * failed (shard changes, was the computer suspended, etc.).
     */
    details?: Object;

    /**
     * Redux dispatch function.
     */
    dispatch: IStore['dispatch'];

    /**
     * The error that caused the display of the overlay.
     */
    error?: any;

    /**
     * The indicator which determines whether the reload was caused by network
     * failure.
     */
    isNetworkFailure: boolean;

    /**
     * The reason for the error that will cause the reload.
     * NOTE: Used by PageReloadOverlay only.
     */
    reason?: string;
}

/**
 * The type of the React {@code Component} state of
 * {@link AbstractPageReloadOverlay}.
 */
interface IState {

    /**
     * The translation key for the title of the overlay.
     */
    message: string;

    /**
     * Current value(time) of the timer.
     */
    timeLeft: number;

    /**
     * How long the overlay dialog will be displayed before the conference will
     * be reloaded.
     */
    timeoutSeconds: number;

    /**
     * The translation key for the title of the overlay.
     */
    title: string;
}

/**
 * Implements an abstract React {@link Component} for the page reload overlays.
 *
 * FIXME: This is not really an abstract class as some components and functions are very web specific.
 */
export default class AbstractPageReloadOverlay<P extends IProps>
    extends Component<P, IState> {

    /**
     * Determines whether this overlay needs to be rendered (according to a
     * specific redux state). Called by {@link OverlayContainer}.
     *
     * @param {Object} state - The redux state.
     * @returns {boolean} - If this overlay needs to be rendered, {@code true};
     * {@code false}, otherwise.
     */
    static needsRender(state: IReduxState) {
        const { error: conferenceError } = state['features/base/conference'];
        const { error: configError } = state['features/base/config'];
        const { error: connectionError } = state['features/base/connection'];

        const jitsiConnectionError
            = connectionError && isFatalJitsiConnectionError(connectionError);
        const jitsiConferenceError
            = conferenceError && isFatalJitsiConferenceError(conferenceError);

        return jitsiConnectionError || jitsiConferenceError || configError;
    }

    _interval: number | undefined;

    /**
     * Initializes a new AbstractPageReloadOverlay instance.
     *
     * @param {Object} props - The read-only properties with which the new
     * instance is to be initialized.
     * @public
     */
    constructor(props: P) {
        super(props);

        /**
         * How long the overlay dialog will be displayed, before the conference
         * will be reloaded.
         *
         * @type {number}
         */
        const timeoutSeconds = 10 + randomInt(0, 20);

        let message, title;

        if (this.props.isNetworkFailure) {
            title = 'dialog.conferenceDisconnectTitle';
            message = 'dialog.conferenceDisconnectMsg';
        } else {
            title = 'dialog.conferenceReloadTitle';
            message = 'dialog.conferenceReloadMsg';
        }

        this.state = {
            message,
            timeLeft: timeoutSeconds,
            timeoutSeconds,
            title
        };
    }

    /**
     * React Component method that executes once component is mounted.
     *
     * @inheritdoc
     * @returns {void}
     */
    override componentDidMount() {
        // FIXME: We should dispatch action for this.
        if (typeof APP !== 'undefined' && APP.conference?._room) {
            APP.conference._room.sendApplicationLog(JSON.stringify({
                name: 'page.reload',
                label: this.props.reason
            }));
        }

        sendAnalytics(createPageReloadScheduledEvent(
            this.props.reason ?? '',
            this.state.timeoutSeconds,
            this.props.details));

        logger.info(
            `The conference will be reloaded after ${
                this.state.timeoutSeconds} seconds.`);

        this._interval
            = window.setInterval(
                () => {
                    if (this.state.timeLeft === 0) {
                        if (this._interval) {
                            clearInterval(this._interval);
                            this._interval = undefined;
                        }

                        this.props.dispatch(reloadNow());
                    } else {
                        this.setState(prevState => {
                            return {
                                timeLeft: prevState.timeLeft - 1
                            };
                        });
                    }
                },
                1000);
    }

    /**
     * Clears the timer interval.
     *
     * @inheritdoc
     * @returns {void}
     */
    override componentWillUnmount() {
        if (this._interval) {
            clearInterval(this._interval);
            this._interval = undefined;
        }
    }

    /**
     * Renders the button for reloading the page if necessary.
     *
     * @protected
     * @returns {ReactElement|null}
     */
    _renderButton() {
        if (this.props.isNetworkFailure) {
            return (
                <ReloadButton textKey = 'dialog.rejoinNow' />
            );
        }

        return null;
    }

    /**
     * Renders the progress bar.
     *
     * @protected
     * @returns {ReactElement}
     */
    _renderProgressBar() {
        const { timeLeft, timeoutSeconds } = this.state;
        const timeRemaining = timeoutSeconds - timeLeft;
        const percentageComplete
            = Math.floor((timeRemaining / timeoutSeconds) * 100);

        return (
            <div
                className = 'progress-indicator'
                id = 'reloadProgressBar'>
                <div
                    className = 'progress-indicator-fill'
                    style = {{ width: `${percentageComplete}%` }} />
            </div>
        );
    }
}

/**
 * Maps (parts of) the redux state to the associated component's props.
 *
 * @param {Object} state - The redux state.
 * @protected
 * @returns {{
 *     details: Object,
 *     error: ?Error,
 *     isNetworkFailure: boolean,
 *     reason: string
 * }}
 */
export function abstractMapStateToProps(state: IReduxState) {
    const { error: configError } = state['features/base/config'];
    const { error: connectionError } = state['features/base/connection'];
    const { error: conferenceError } = state['features/base/conference'];
    const error = configError || connectionError || conferenceError;
    let reason;

    if (conferenceError) {
        reason = `error.conference.${conferenceError.name}`;
    } else if (configError) {
        reason = `error.config.${configError.name}`;
    } else if (connectionError) {
        reason = `error.connection.${connectionError.name}`;
    } else {
        logger.error('No reload reason defined!');
    }

    return {
        details: undefined, // TODO: revisit this.
        error,
        isNetworkFailure: Boolean(configError || connectionError),
        reason
    };
}