import {AbstractControl, ValidationErrors, ValidatorFn} from '@angular/forms';

export class BirthdayLimitValidator {

  static format(control: AbstractControl): ValidationErrors | null {
    const D1 = new Date();
    D1.setFullYear(D1.getFullYear() - 100);
    const D2 = new Date();
    D2.setFullYear(D2.getFullYear() - 18);
    const D3 = new Date(control.value);

    if (D3.getTime() <= D2.getTime()
      && D3.getTime() >= D1.getTime()) {
      return null;
    } else {
      const dateMin = BirthdayLimitValidator.formatedNumber(D1.getDate()) + '/' + BirthdayLimitValidator.formatedNumber(D1.getMonth() + 1) + '/' + D1.getFullYear();
      const dateMax = BirthdayLimitValidator.formatedNumber(D2.getDate()) + '/' + BirthdayLimitValidator.formatedNumber(D2.getMonth() + 1) + '/' + D2.getFullYear();
      return {
        validation: {
          message: (error, field) => {
            return `La date doit être comprise entre le \"${dateMin}\" et le \"${dateMax}\"`;
          }
        }
      };
    }
  }

  static formatedNumber(date: any): string {
    return date < 10 ? '0' + date : date;
  }
}