import { Logger } from '@stackbit/types';

export class Timer {
    private readonly timerCallback: () => void;
    private readonly timerMs: number;
    private readonly logger?: Logger;
    private timeout: NodeJS.Timeout | null;

    constructor({ timerCallback, timerMs = 30 * 60 * 1000, logger }: { timerCallback: () => void; timerMs?: number; logger?: Logger }) {
        this.timerCallback = timerCallback;
        this.timerMs = timerMs;
        this.logger = logger?.createLogger({ label: 'timer' });
        this.timeout = null;
        this.handleTimeout = this.handleTimeout.bind(this);
    }

    isRunning() {
        return !!this.timeout;
    }

    startTimer() {
        this.resetTimer();
    }

    resetTimer() {
        this.stopTimer();
        this.timeout = setTimeout(this.handleTimeout, this.timerMs);
    }

    stopTimer() {
        if (this.timeout) {
            clearTimeout(this.timeout);
            this.timeout = null;
        }
    }

    handleTimeout() {
        this.logger?.debug('timer reached');
        this.timeout = null;
        this.timerCallback();
    }
}