package com.estate.expert.admin.domain.common.request;

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.AllArgsConstructor;
import lombok.Data;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Sort;

import javax.validation.constraints.Min;

@ApiModel("分页请求")
@Data
@AllArgsConstructor
public class PageReq {

    @ApiModelProperty(value = "当前页", notes = "从0开始")
    @Min(0)
    private Integer page = 1;

    @ApiModelProperty(value = "每页大小", notes = "从1开始")
    @Min(1)
    private Integer size = 10;

    @ApiModelProperty(value = "排序字段", notes = "和查找的对象的字段名一致")
    private String orderField = null;

    @ApiModelProperty(value = "是否升序")
    private boolean asc = true;

    // default
    public static PageReq defaultPageReq() {
        return new PageReq(0, 10, null, true);
    }

    public static PageReq of(Integer currPage, Integer pageSize) {
        return new PageReq(currPage, pageSize, null, true);
    }

    public static PageReq of(Integer currPage, Integer pageSize, String orderField, boolean asc) {
        return new PageReq(currPage, pageSize, orderField, asc);
    }

    public static PageReq maxPageReq() {
        return new PageReq(0, Integer.MAX_VALUE, null, true);
    }

    public PageRequest toPageRequest() {
        if(orderField == null || orderField.isEmpty()) {
            return PageRequest.of(page, size);
        }

        return PageRequest.of(page, size, asc ? Sort.by(orderField).ascending() : Sort.by(orderField).descending());
    }


}