package io.spring.application;

import io.spring.application.CursorPager.Direction;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@NoArgsConstructor
public class CursorPageParameter {
  private static final int MAX_LIMIT = 1000;
  private int limit = 20;
  private String cursor;
  private Direction direction;

  public CursorPageParameter(String cursor, int limit, Direction direction) {
    setLimit(limit);
    setCursor(cursor);
    setDirection(direction);
  }

  public boolean isNext() {
    return direction == Direction.NEXT;
  }

  public int getQueryLimit() {
    return limit + 1;
  }

  private void setCursor(String cursor) {
    if (cursor == null) {
      this.cursor = "";
    } else {
      this.cursor = cursor;
    }
  }

  private void setLimit(int limit) {
    if (limit > MAX_LIMIT) {
      this.limit = MAX_LIMIT;
    } else if (limit > 0) {
      this.limit = limit;
    }
  }
}