export class DateUtil {
  static getCurrentTimestamp(): Date {
    return new Date();
  }

  static getTimestampInSeconds(): number {
    return Math.floor(Date.now() / 1000);
  }

  static addDays(date: Date, days: number): Date {
    const result = new Date(date);
    result.setDate(result.getDate() + days);
    return result;
  }

  static addHours(date: Date, hours: number): Date {
    const result = new Date(date);
    result.setHours(result.getHours() + hours);
    return result;
  }

  static addMinutes(date: Date, minutes: number): Date {
    const result = new Date(date);
    result.setMinutes(result.getMinutes() + minutes);
    return result;
  }

  static addSeconds(date: Date, seconds: number): Date {
    const result = new Date(date);
    result.setSeconds(result.getSeconds() + seconds);
    return result;
  }

  static isExpired(date: Date): boolean {
    return date < this.getCurrentTimestamp();
  }

  static getDifferenceInSeconds(date1: Date, date2: Date): number {
    return Math.floor((date1.getTime() - date2.getTime()) / 1000);
  }

  static getDifferenceInMinutes(date1: Date, date2: Date): number {
    return Math.floor(this.getDifferenceInSeconds(date1, date2) / 60);
  }

  static getDifferenceInHours(date1: Date, date2: Date): number {
    return Math.floor(this.getDifferenceInMinutes(date1, date2) / 60);
  }

  static getDifferenceInDays(date1: Date, date2: Date): number {
    return Math.floor(this.getDifferenceInHours(date1, date2) / 24);
  }

  static startOfDay(date: Date = new Date()): Date {
    const result = new Date(date);
    result.setHours(0, 0, 0, 0);
    return result;
  }

  static endOfDay(date: Date = new Date()): Date {
    const result = new Date(date);
    result.setHours(23, 59, 59, 999);
    return result;
  }

  static startOfMonth(date: Date = new Date()): Date {
    const result = new Date(date);
    result.setDate(1);
    result.setHours(0, 0, 0, 0);
    return result;
  }

  static endOfMonth(date: Date = new Date()): Date {
    const result = new Date(date.getFullYear(), date.getMonth() + 1, 0);
    result.setHours(23, 59, 59, 999);
    return result;
  }

  static formatISO(date: Date): string {
    return date.toISOString();
  }

  static formatDate(date: Date, format: string = 'DD/MM/YYYY'): string {
    const day = String(date.getDate()).padStart(2, '0');
    const month = String(date.getMonth() + 1).padStart(2, '0');
    const year = date.getFullYear();

    return format.replace('DD', day).replace('MM', month).replace('YYYY', year.toString());
  }

  static parseISO(dateString: string): Date {
    return new Date(dateString);
  }
}