/**
 * Scheduler component to schedule message sending.
 */

import {DirectPushScheduler as DefaultScheduler} from '../pushSchedulers/direct';
import { getLogger } from 'omelox-logger';
import { Application } from '../application';
import { IComponent } from '../interfaces/IComponent';
import { IPushScheduler, ScheduleOptions, IPushSchedulerOrCtor, IPushSchedulerOptions, MultiPushSchedulerOptions } from '../interfaces/IPushScheduler';
import { MultiPushScheduler } from '../pushSchedulers/multi';
import { SID } from '../util/constants';
import * as path from 'path';
let logger = getLogger('omelox', path.basename(__filename));


export class PushSchedulerComponent implements IComponent {
    scheduler: IPushScheduler;
    constructor(private app: Application, opts ?: IPushSchedulerOptions) {
        opts = opts || {};
        this.scheduler = getScheduler(this, app, opts);
    }

    name = '__pushScheduler__';

    /**
     * Component lifecycle callback
     *
     * @param {Function} cb
     * @return {Void}
     */
    afterStart(cb: () => void) {
        this.scheduler.start().then(cb);
    }

    /**
     * Component lifecycle callback
     *
     * @param {Function} cb
     * @return {Void}
     */
    stop(force: boolean, cb: () => void) {
        this.scheduler.stop().then(cb);
    }

    /**
     * Schedule how the message to send.
     *
     * @param  {Number}   reqId request id
     * @param  {String}   route route string of the message
     * @param  {Object}   msg   message content after encoded
     * @param  {Array}    recvs array of receiver's session id
     * @param  {Object}   opts  options
     * @param  {Function} cb
     */
    schedule(reqId: number, route: string, msg: any, recvs: SID[], opts: ScheduleOptions, cb: (err?: Error) => void) {
        this.scheduler.schedule(reqId, route, msg, recvs, opts, cb);
    }
}
let getScheduler = function (pushSchedulerComp: PushSchedulerComponent, app: Application, opts: IPushSchedulerOptions): IPushScheduler {
    let scheduler = opts.scheduler || DefaultScheduler;
    if (typeof scheduler === 'function') {
        return new scheduler(app, opts);
    }

    if (Array.isArray(scheduler)) {
        return new MultiPushScheduler(app , opts as MultiPushSchedulerOptions);
    }

    return scheduler as IPushScheduler;
};