package com.ruoyi.im.comm;

import java.io.Serializable;

/**
 * REST API 统一返回结果封装类
 * @param <T> 返回数据类型
 */
public class Result<T> implements Serializable {
    // 状态码
    private int code;
    // 消息提示
    private String message;
    // 返回数据
    private T data;
    // 时间戳
    private long timestamp;

    // 常用状态码
    public static final int SUCCESS_CODE = 200;
    public static final int BAD_REQUEST_CODE = 400;
    public static final int UNAUTHORIZED_CODE = 401;
    public static final int FORBIDDEN_CODE = 403;
    public static final int NOT_FOUND_CODE = 404;
    public static final int SERVER_ERROR_CODE = 500;

    // 私有构造器
    private Result(int code, String message, T data) {
        this.code = code;
        this.message = message;
        this.data = data;
        this.timestamp = System.currentTimeMillis();
    }

    // ============= 成功响应方法 =============

    public static <T> Result<T> success() {
        return new Result<>(SUCCESS_CODE, "操作成功", null);
    }

    public static <T> Result<T> success(T data) {
        return new Result<>(SUCCESS_CODE, "操作成功", data);
    }

    public static <T> Result<T> success(String message, T data) {
        return new Result<>(SUCCESS_CODE, message, data);
    }

    // ============= 错误响应方法 =============

    public static <T> Result<T> error() {
        return new Result<>(SERVER_ERROR_CODE, "系统错误", null);
    }

    public static <T> Result<T> error(String message) {
        return new Result<>(SERVER_ERROR_CODE, message, null);
    }

    public static <T> Result<T> error(int code, String message) {
        return new Result<>(code, message, null);
    }

    public static <T> Result<T> badRequest(String message) {
        return new Result<>(BAD_REQUEST_CODE, message, null);
    }

    public static <T> Result<T> unauthorized(String message) {
        return new Result<>(UNAUTHORIZED_CODE, message, null);
    }

    public static <T> Result<T> forbidden(String message) {
        return new Result<>(FORBIDDEN_CODE, message, null);
    }

    public static <T> Result<T> notFound(String message) {
        return new Result<>(NOT_FOUND_CODE, message, null);
    }

    // ============= Getter方法 =============

    public int getCode() {
        return code;
    }

    public String getMessage() {
        return message;
    }

    public T getData() {
        return data;
    }

    public long getTimestamp() {
        return timestamp;
    }
}