// Logging
console.loggerName = "org.openhab.js.utils.TimerMgr";
console.log("Loading utils.TimerMgr");

class TimerMgr {

    #timers = new Object();

    constructor() {
        console.info('Initialization of TimerMgr helper class');
    }

    create(id, timeout, func) {
        console.log("Create timer with id " + id);
        this.#timers[id] = actions.ScriptExecution.createTimer(id, timeout, func);
    }

    cancel(identifier) {
        // Return if no timer with the respactive identifier is available
        if (!this.#timers.hasOwnProperty(identifier)) {
            console.log(`No timer with identifier ${identifier} available to cancel`);
            return false;
        }

        // Check if timer is active
        if (!this.#timers[identifier].isActive()) {
            console.log(`Timer with identifier ${identifier} not running. Cancel anyway`);
        } else {
            console.log(`Cancel timer with identifier ${identifier}`);  
        }

        // Cancel timer
        this.#timers[identifier].cancel();
        delete this.#timers[identifier];
    }

    hasTimer(id) {
        return this.#timers.hasOwnProperty(id);
    }

    isActive(identifier) {
        return this.#timers[identifier].isActive();
    }

    cancelAll() {
        // Fetch timers
        let timers = Object.keys(this.#timers);

        // Return if no timers available
        if (timers.length == 0) {
            console.log('No timers available to cancel');
            return false;
        }
        
        // Cancel all timers
        for (let timer of timers) {
           this.cancel(timer);
        }
    }

    reschedule(id, timeout) {
        this.#timers[id].reschedule(timeout);
    }
}

function getTimerMgr () {
    return new TimerMgr();
}

module.exports = {
    TimerMgr,
    getTimerMgr
};