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package io.github.dengchen2020.core.support.model;

import jakarta.validation.constraints.Min;
import org.hibernate.validator.constraints.Range;

import java.io.Serial;
import java.io.Serializable;

/**
 * 分页查询条件
 *
 * @author dengchen
 * @since 2019/2/26 10:17
 */
public class PageParam implements Serializable {

    @Serial
    private static final long serialVersionUID = 1L;

    public static PageParam of(int page, int size){
        PageParam param = new PageParam();
        param.setPage(page);
        param.setSize(size);
        return param;
    }

    public static PageParam of(int page, int size, boolean selectCount){
        PageParam param = of(page, size);
        param.setSelectCount(selectCount);
        return param;
    }

    /**
     * 页码,值>0,默认1
     */
    @Min(value = 1)
    private Integer page;

    /**
     * 每页数据条数,1-100,默认10；size=0，没有列表信息，只查总数total
     */
    @Range(min = 0, max = 100)
    private Integer size = 10;

    private boolean selectCount = true;

    public Integer getSize() {
        return size == null ? 10 : size;
    }

    public Integer getPage() {
        return (page != null && page > 0) ? page : 1;
    }

    public long getOffset() {
        return (long) (getPage() - 1) * getSize();
    }

    public void setPage(Integer page) {
        this.page = page;
    }

    public void setSize(Integer size) {
        this.size = size;
    }

    public boolean isSelectCount() {
        return selectCount;
    }

    public void setSelectCount(boolean selectCount) {
        this.selectCount = selectCount;
    }
}