package com.xly.erp.common.response;

import java.io.Serializable;

/**
 * 统一响应体（docs/04 § 1.4 SSoT）。
 *
 * <p>REQ-USR-001 T2。所有接口返回 {@code Result<T>}：{@code code=0} 成功，非 0 为错误码。</p>
 *
 * @param <T> 业务数据类型
 */
public class Result<T> implements Serializable {

    private static final long serialVersionUID = 1L;

    private int code;
    private String message;
    private T data;

    public Result() {
    }

    public Result(int code, String message, T data) {
        this.code = code;
        this.message = message;
        this.data = data;
    }

    /**
     * 成功且携带数据。
     */
    public static <T> Result<T> success(T data) {
        return new Result<>(ResultCode.SUCCESS.getCode(), ResultCode.SUCCESS.getMessage(), data);
    }

    /**
     * 成功且不携带数据。
     */
    public static <T> Result<T> success() {
        return new Result<>(ResultCode.SUCCESS.getCode(), ResultCode.SUCCESS.getMessage(), null);
    }

    /**
     * 失败，携带错误码与可读提示。
     */
    public static <T> Result<T> fail(ResultCode code, String message) {
        return new Result<>(code.getCode(), message, null);
    }

    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public T getData() {
        return data;
    }

    public void setData(T data) {
        this.data = data;
    }
}