package kr.wisestone.owl.util;

import kr.wisestone.owl.common.MessageAccessor;
import kr.wisestone.owl.constant.MsgConstants;
import kr.wisestone.owl.exception.OwlRuntimeException;
import kr.wisestone.owl.vo.PageVo;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;

public class PageUtil {
    @SuppressWarnings("unused")
    private static final Logger LOGGER = LoggerFactory.getLogger(PageUtil.class);

    @Autowired
    private MessageAccessor messageAccessor;

    /**
     * 유효성을 체크한 후에 유효하지 않으면 에러를 발생시킨다.
     * @param pageVo
     */
    public void validatePageVo(PageVo pageVo) {
        if (pageVo == null) {
            throw new OwlRuntimeException(this.messageAccessor.getMessage(MsgConstants.PAGE_NOT_EXIST_INFO));
        }

        if (pageVo.getPage() == null || pageVo.getPage() < 0) {
            if (pageVo.getRelPage() == null || pageVo.getRelPage() < 0
                    || pageVo.getDownPage() == null || pageVo.getDownPage() < 0) {
                throw new OwlRuntimeException(this.messageAccessor.getMessage(MsgConstants.PAGE_NEGATIVE_OR_NULL));
            }
        }

        if (pageVo.getPageSize() == null || pageVo.getPageSize() < 0) {
            if (pageVo.getRelPageSize() == null || pageVo.getRelPageSize() < 0
                    || pageVo.getDownPageSize() == null || pageVo.getDownPageSize() < 0) {
                throw new OwlRuntimeException(this.messageAccessor.getMessage(MsgConstants.PAGE_SIZE_NEGATIVE_OR_NULL));
            }
        }
    }

	public Pageable convertPageable(PageVo pageVo) {
        return PageRequest.of(pageVo.getPage(), pageVo.getPageSize());
	}

	public Pageable getDefaultPageable() {
		return PageRequest.of(0, 300);
	}

	public Pageable getDefaultPageable(int page, int size) {
		return PageRequest.of(page, size);
	}

	public PageVo getDefaultPageVo() {
		return new PageVo(0, 300);
	}

	public static Pageable applySort(Pageable page, String field, Sort.Direction direction) {

		return PageRequest.of(page.getPageNumber(), page.getPageSize(), new Sort(direction, field));
	}
}