/* global $, $iq */

import { getLogger } from 'jitsi-meet-logger';
const logger = getLogger(__filename);
const XMPPEvents = require('../../service/xmpp/XMPPEvents');
const JitsiRecorderErrors = require('../../JitsiRecorderErrors');
const GlobalOnErrorHandler = require('../util/GlobalOnErrorHandler');

function Recording(type, eventEmitter, connection, focusMucJid, jirecon,
    roomjid) {
    this.eventEmitter = eventEmitter;
    this.connection = connection;
    this.state = null;
    this.focusMucJid = focusMucJid;
    this.jirecon = jirecon;
    this.url = null;
    this.type = type;
    this._isSupported
        = !(
            (type === Recording.types.JIRECON && !this.jirecon)
                || (type !== Recording.types.JIBRI
                    && type !== Recording.types.COLIBRI));

    /**
     * The ID of the jirecon recording session. Jirecon generates it when we
     * initially start recording, and it needs to be used in subsequent requests
     * to jirecon.
     */
    this.jireconRid = null;
    this.roomjid = roomjid;
}

Recording.types = {
    COLIBRI: 'colibri',
    JIRECON: 'jirecon',
    JIBRI: 'jibri'
};

Recording.status = {
    ON: 'on',
    OFF: 'off',
    AVAILABLE: 'available',
    UNAVAILABLE: 'unavailable',
    PENDING: 'pending',
    RETRYING: 'retrying',
    BUSY: 'busy',
    FAILED: 'failed'
};

Recording.action = {
    START: 'start',
    STOP: 'stop'
};

Recording.prototype.handleJibriPresence = function(jibri) {
    const attributes = jibri.attributes;

    if(!attributes) {
        return;
    }

    const newState = attributes.status;

    logger.log('Handle jibri presence : ', newState);

    if (newState === this.state) {
        return;
    }

    if (newState === 'undefined') {
        this.state = Recording.status.UNAVAILABLE;
    } else if (newState === 'off') {
        if (!this.state
            || this.state === 'undefined'
            || this.state === Recording.status.UNAVAILABLE) {
            this.state = Recording.status.AVAILABLE;
        } else {
            this.state = Recording.status.OFF;
        }
    } else {
        this.state = newState;
    }

    this.eventEmitter.emit(XMPPEvents.RECORDER_STATE_CHANGED, this.state);
};

Recording.prototype.setRecordingJibri
    = function(state, callback, errCallback, options) {

        if (state == this.state) {
            errCallback(JitsiRecorderErrors.INVALID_STATE);
        }
        options = options || {};

    // FIXME jibri does not accept IQ without 'url' attribute set ?
        const iq
            = $iq({to: this.focusMucJid, type: 'set'})
                .c('jibri', {
                    'xmlns': 'http://jitsi.org/protocol/jibri',
                    'action': state === Recording.status.ON
                            ? Recording.action.START
                            : Recording.action.STOP,
                    'streamid': options.streamId,
                })
                .up();

        logger.log(`Set jibri recording: ${state}`, iq.nodeTree);
        logger.log(iq.nodeTree);
        this.connection.sendIQ(
        iq,
        result => {
            logger.log('Result', result);

            const jibri = $(result).find('jibri');

            callback(jibri.attr('state'), jibri.attr('url'));
        },
        error => {
            logger.log('Failed to start recording, error: ', error);
            errCallback(error);
        });
    };

Recording.prototype.setRecordingJirecon
    = function(state, callback, errCallback) {

        if (state == this.state) {
            errCallback(new Error('Invalid state!'));
        }

        const iq = $iq({to: this.jirecon, type: 'set'})
        .c('recording', {xmlns: 'http://jitsi.org/protocol/jirecon',
            action: state === Recording.status.ON
                ? Recording.action.START
                : Recording.action.STOP,
            mucjid: this.roomjid});

        if (state === 'off') {
            iq.attrs({rid: this.jireconRid});
        }

        logger.log('Start recording');
        const self = this;

        this.connection.sendIQ(
        iq,
        result => {
            // TODO wait for an IQ with the real status, since this is
            // provisional?
            // eslint-disable-next-line newline-per-chained-call
            self.jireconRid = $(result).find('recording').attr('rid');
            logger.log(
                `Recording ${
                    state === Recording.status.ON ? 'started' : 'stopped'
                    }(jirecon)${result}`);
            self.state = state;
            if (state === Recording.status.OFF) {
                self.jireconRid = null;
            }

            callback(state);
        },
        error => {
            logger.log('Failed to start recording, error: ', error);
            errCallback(error);
        });
    };

// Sends a COLIBRI message which enables or disables (according to 'state')
// the recording on the bridge. Waits for the result IQ and calls 'callback'
// with the new recording state, according to the IQ.
Recording.prototype.setRecordingColibri
= function(state, callback, errCallback, options) {
    const elem = $iq({to: this.focusMucJid, type: 'set'});

    elem.c('conference', {
        xmlns: 'http://jitsi.org/protocol/colibri'
    });
    elem.c('recording', {state, token: options.token});

    const self = this;

    this.connection.sendIQ(elem,
        result => {
            logger.log('Set recording "', state, '". Result:', result);
            const recordingElem = $(result).find('>conference>recording');
            const newState = recordingElem.attr('state');

            self.state = newState;
            callback(newState);

            if (newState === 'pending') {
                self.connection.addHandler(iq => {
                    // eslint-disable-next-line newline-per-chained-call
                    const state = $(iq).find('recording').attr('state');

                    if (state) {
                        self.state = newState;
                        callback(state);
                    }
                }, 'http://jitsi.org/protocol/colibri', 'iq', null, null, null);
            }
        },
        error => {
            logger.warn(error);
            errCallback(error);
        }
    );
};

Recording.prototype.setRecording
= function(state, callback, errCallback, options) {
    switch(this.type) {
    case Recording.types.JIRECON:
        this.setRecordingJirecon(state, callback, errCallback, options);
        break;
    case Recording.types.COLIBRI:
        this.setRecordingColibri(state, callback, errCallback, options);
        break;
    case Recording.types.JIBRI:
        this.setRecordingJibri(state, callback, errCallback, options);
        break;
    default: {
        const errmsg = 'Unknown recording type!';

        GlobalOnErrorHandler.callErrorHandler(new Error(errmsg));
        logger.error(errmsg);
        break;
    }
    }
};

/**
 * Starts/stops the recording.
 * @param token token for authentication
 * @param statusChangeHandler {function} receives the new status as argument.
 */
Recording.prototype.toggleRecording = function(options, statusChangeHandler) {
    const oldState = this.state;

    // If the recorder is currently unavailable we throw an error.
    if (oldState === Recording.status.UNAVAILABLE
        || oldState === Recording.status.FAILED) {
        statusChangeHandler(Recording.status.FAILED,
                            JitsiRecorderErrors.RECORDER_UNAVAILABLE);
    } else if (oldState === Recording.status.BUSY) {
        statusChangeHandler(Recording.status.BUSY,
                            JitsiRecorderErrors.RECORDER_BUSY);
    }

    // If we're about to turn ON the recording we need either a streamId or
    // an authentication token depending on the recording type. If we don't
    // have any of those we throw an error.
    if ((oldState === Recording.status.OFF
        || oldState === Recording.status.AVAILABLE)
        && ((!options.token && this.type === Recording.types.COLIBRI)
        || (!options.streamId && this.type === Recording.types.JIBRI))) {
        statusChangeHandler(Recording.status.FAILED,
                            JitsiRecorderErrors.NO_TOKEN);
        logger.error('No token passed!');

        return;
    }

    const newState = oldState === Recording.status.AVAILABLE
                    || oldState === Recording.status.OFF
                    ? Recording.status.ON
                    : Recording.status.OFF;

    const self = this;

    logger.log('Toggle recording (old state, new state): ', oldState, newState);
    this.setRecording(
        newState,
        (state, url) => {
            // If the state is undefined we're going to wait for presence
            // update.
            if (state && state !== oldState) {
                self.state = state;
                self.url = url;
                statusChangeHandler(state);
            }
        },
        error => statusChangeHandler(Recording.status.FAILED, error),
        options);
};

/**
 * Returns true if the recording is supproted and false if not.
 */
Recording.prototype.isSupported = function() {
    return this._isSupported;
};

/**
 * Returns null if the recording is not supported, "on" if the recording started
 * and "off" if the recording is not started.
 */
Recording.prototype.getState = function() {
    return this.state;
};

/**
 * Returns the url of the recorded video.
 */
Recording.prototype.getURL = function() {
    return this.url;
};

module.exports = Recording;