/**
 * Copyright (c) 2020 fumeiai All rights reserved.
 * <p>
 * <p>
 * <p>
 * 版权所有，侵权必究！
 */

package com.lz.common.utils;

import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;

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

/**
 * 分页工具类
 *
 * @author Mark sunlightcs@gmail.com
 */
public class PageUtils<E> implements Serializable {
    private static final long serialVersionUID = 1L;
    /**
     * 总记录数
     */
    private int totalCount;
    /**
     * 每页记录数
     */
    private int pageSize;
    /**
     * 总页数
     */
    private int totalPage;
    /**
     * 当前页数
     */
    private int currPage;
    /**
     * 列表数据
     */
    private List<?> list;

    /**
     * 分页
     * @param list        列表数据
     * @param totalCount  总记录数
     * @param pageSize    每页记录数
     * @param currPage    当前页数
     */
    public PageUtils(List<?> list, int totalCount, int pageSize, int currPage) {
        this.list = list;
        this.totalCount = totalCount;
        this.pageSize = pageSize;
        this.currPage = currPage;
        this.totalPage = (int) Math.ceil((double) totalCount / pageSize);
    }


    public <E> PageUtils<E> doSelect(ISelect select) {
        IPage page = new Page(this.currPage, this.pageSize);
        list = select.doSelect(page);
        page.setRecords(list);
        return new PageUtils<E>(page);
    }

    /**
     * 开始分页
     *
     * @param pageNum  页码
     * @param pageSize 每页显示数量
     * @param count    是否进行count查询
     */
    public static <E> PageUtils<E> startPage(int pageNum, int pageSize) {
        IPage<E> page = new Page<E>(pageNum, pageSize);
        return new PageUtils<E>(page);
    }


	/**
	 * 分页
	 */
	public PageUtils(IPage<?> page) {
		this.list = page.getRecords();
		this.totalCount = (int) page.getTotal();
		this.pageSize = (int) page.getSize();
		this.currPage = (int) page.getCurrent();
		this.totalPage = (int) page.getPages();
	}



	public int getTotalCount() {
        return totalCount;
    }

    public void setTotalCount(int totalCount) {
        this.totalCount = totalCount;
    }

    public int getPageSize() {
        return pageSize;
    }

    public void setPageSize(int pageSize) {
        this.pageSize = pageSize;
    }

    public int getTotalPage() {
        return totalPage;
    }

    public void setTotalPage(int totalPage) {
        this.totalPage = totalPage;
    }

    public int getCurrPage() {
        return currPage;
    }

    public void setCurrPage(int currPage) {
        this.currPage = currPage;
    }

    public List<?> getList() {
        return list;
    }

    public void setList(List<?> list) {
        this.list = list;
    }

}