package com.trs.digital.framework.common.pojo;

import com.alibaba.fastjson.JSONObject;
import io.swagger.v3.oas.annotations.media.Schema;
import lombok.Data;

import javax.validation.constraints.Max;
import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;


@Schema(description = "分页结果")
@Data
public final class PageResult<T> implements Serializable {

    @Schema(description = "数据", requiredMode = Schema.RequiredMode.REQUIRED)
    private List<T> list;

    private JSONObject category = null;
    private JSONObject correctData = null;

    @Schema(description = "总量", requiredMode = Schema.RequiredMode.REQUIRED)
    private Long total;

    private static final Integer PAGE_NO = 1;
    private static final Integer PAGE_SIZE = 10;

    @Schema(description = "页码，从 1 开始", requiredMode = Schema.RequiredMode.REQUIRED,example = "1")
    @NotNull(message = "页码不能为空")
    @Min(value = 1, message = "页码最小值为 1")
    private Integer pageNo = PAGE_NO;

    @Schema(description = "每页条数，最大值为 100", requiredMode = Schema.RequiredMode.REQUIRED, example = "10")
    @NotNull(message = "每页条数不能为空")
    @Min(value = 1, message = "每页条数最小值为 1")
    @Max(value = 100, message = "每页条数最大值为 100")
    private Integer pageSize = PAGE_SIZE;

    public PageResult() {
    }

    public PageResult(List<T> list, Long total) {
        this.list = list;
        this.total = total;
    }

    public PageResult(Long total) {
        this.list = new ArrayList<>();
        this.total = total;
    }

    public static <T> PageResult<T> empty() {
        return new PageResult<>(0L);
    }

    public static <T> PageResult<T> empty(Long total) {
        return new PageResult<>(total);
    }
    
}
