package com.nuvole.common.domain.result;

import cn.hutool.core.convert.Convert;
import cn.hutool.core.util.NumberUtil;
import com.nuvole.util.BeanUtil;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

// @formatter:off
/**
 *                .-~~~~~~~~~-._       _.-~~~~~~~~~-.
 *            __.'  @Author     ~.   .~    代码无Bug   `.__
 *          .'//     liu.q        \./       (秘籍)      \\`.
 *        .'// [916000612@qq.com]  |   欲练神功   引刀自宫  \\`.
 *      .'// .-~"""""""~~~~-._     |    _,-~~~~"""""""~-.  \\`.
 *    .'//.-"  2019-04-09     `-.  |  .-'     11:35       "-.\\`.
 *  .'//______.============-..   \ | /   ..-============.______\\`.
 *.'______________________________\|/______________________________`.
 *
 * @Description :
 */
// @formatter:on

@Data
@NoArgsConstructor
@ApiModel("列表 返回结果列表封装")
public class PageBean<T> implements Serializable {
    private static final long serialVersionUID = 1000L;

    @ApiModelProperty("总记录数")
    private Integer total; //总记录数
    @ApiModelProperty("结果集")
    private List<T> rows; //结果集
    @ApiModelProperty("第几页")
    private int pageNumber; //第几页
    @ApiModelProperty("每页记录数")
    private int pageSize; //每页记录数
    @ApiModelProperty("总页数")
    private int pages; // 总页数
    @ApiModelProperty("当前页的数量<=pageSize")
    private int size; //当前页的数量<=pageSize

    public PageBean(Object obj) {
        Map map = BeanUtil.obj2Map(obj);
        if(map!=null){
            this.pageNumber = Convert.toInt(map.get("pageNum"));
            this.pageSize = Convert.toInt(map.get("pageSize"));
            this.total = Convert.toInt(map.get("total"));
            this.pages = Convert.toInt(map.get("pages"));
            this.rows = obj == null ? new ArrayList<>() : (List<T>)obj;
            this.size = this.rows.size();
        }
    }

    public void setData(List list){
        if(list != null && list.size() >0){
            this.total = list.size();
            //分页
            if (this.total > 0) {
                int start = Convert.toInt(NumberUtil.mul(pageNumber-1, pageSize));
                int end = Convert.toInt(NumberUtil.mul(pageNumber,pageSize));
                if (start <= total) {
                    if (end > total) {
                        end = total;
                    }
                    this.rows = list.subList(start, end);
                } else {
                    this.rows = new ArrayList<>();
                }
            }
        }
    }

}