package com.aigeo.common;

import io.swagger.v3.oas.annotations.media.Schema;
import lombok.Data;

import java.util.List;

/**
 * 分页结果封装类
 */
@Data
@Schema(description = "分页结果封装类")
public class ResultPage<T> {

    @Schema(description = "当前页码")
    private int pageNumber;

    @Schema(description = "每页记录数")
    private int pageSize;

    @Schema(description = "总记录数")
    private long total;

    @Schema(description = "总页数")
    private int totalPages;

    @Schema(description = "当前页数据")
    private List<T> items;

    public ResultPage() {
    }

    public ResultPage(int pageNumber, int pageSize, long total, List<T> items) {
        this.pageNumber = pageNumber;
        this.pageSize = pageSize;
        this.total = total;
        this.items = items;
        this.totalPages = (int) Math.ceil((double) total / pageSize);
    }

    /**
     * 创建分页结果
     */
    public static <T> ResultPage<T> of(int pageNumber, int pageSize, long total, List<T> items) {
        return new ResultPage<>(pageNumber, pageSize, total, items);
    }
}