/**
 * TimeWatch class
 * @class
 * @classdesc TimeWatch class to measure elapsed time
 */
class TimeWatch{
    /**
     * TimeWatch constructor
     * @constructor
     * @description TimeWatch constructor
     * @param {number} startTime - start time
     * @param {number} endTime - end time
     */
    constructor(){
        this.startTime = 0;
        this.endTime = 0;
    }

    /**
     * Start the timer
     * @function
     * @description Start the timer
     */
    start(){
        this.startTime = new Date().getTime();
    }
    /**
     * Stop the timer
     * @function
     * @description Stop the timer
     */
    stop(){
        this.endTime = new Date().getTime();
    }

    /**
     * Get the elapsed time
     * @function
     * @description Get the elapsed time
     * @param {string} unit - unit of time (ms, s, min, h)
     * @returns {number} - elapsed time
     */
    getElapsedTime(unit = "ms") {
        const elapsedTime = this.endTime - this.startTime;

        switch (unit) {
            case "s":
                return elapsedTime / 1000;
            case "min":
                return elapsedTime / (1000 * 60);
            case "h":
                return elapsedTime / (1000 * 60 * 60);
            case "ms":
            default:
                return elapsedTime;
        }
    }
    /**
     * Print the elapsed time
     * @function
     * @description Print the elapsed time
     * @param {string} unit - unit of time (ms, s, min, h)
     */
    printElapsedTime(unit = "ms") {
        console.log(`Elapsed Time: ${this.getElapsedTime(unit)} ${unit}`);
    }
}

// commonJS module
module.exports = TimeWatch;