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import android.os.Parcel;
import com.google.android.material.datepicker.CalendarConstraints.DateValidator;
import java.util.Arrays;
import java.util.Calendar;
import java.util.TimeZone;

/** A {@link DateValidator} that only allows dates from a given point onward to be clicked. */
public class DateValidatorWeekdays implements DateValidator {

  DateValidatorWeekdays() {}

  private Calendar utc = Calendar.getInstance(TimeZone.getTimeZone("UTC"));

  public static final Creator<DateValidatorWeekdays> CREATOR =
      new Creator<DateValidatorWeekdays>() {
        @Override
        public DateValidatorWeekdays createFromParcel(Parcel source) {
          return new DateValidatorWeekdays();
        }

        @Override
        public DateValidatorWeekdays[] newArray(int size) {
          return new DateValidatorWeekdays[size];
        }
      };

  @Override
  public boolean isValid(long date) {
    utc.setTimeInMillis(date);
    int dayOfWeek = utc.get(Calendar.DAY_OF_WEEK);
    return dayOfWeek != Calendar.SATURDAY && dayOfWeek != Calendar.SUNDAY;
  }

  @Override
  public int describeContents() {
    return 0;
  }

  @Override
  public void writeToParcel(Parcel dest, int flags) {
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) {
      return true;
    }
    if (!(o instanceof DateValidatorWeekdays)) {
      return false;
    }
    return true;
  }

  @Override
  public int hashCode() {
    Object[] hashedFields = {};
    return Arrays.hashCode(hashedFields);
  }
}