<?php

namespace app\controller;

use Webman\Http\Request;
use Webman\Http\Response;

abstract class BaseController
{
    /**
     * 成功响应
     */
    protected function success($data = null, string $message = 'success'): Response
    {
        return json([
            'code' => 0,
            'message' => $message,
            'data' => $data,
        ]);
    }

    /**
     * 错误响应
     */
    protected function error(string $message = 'error', int $code = 1, $data = null): Response
    {
        return json([
            'code' => $code,
            'message' => $message,
            'data' => $data,
        ]);
    }

    /**
     * 获取当前用户ID
     */
    protected function getUserId(Request $request): ?int
    {
        // 先检查 request 中是否已注入
        if (isset($request->userId)) {
            return $request->userId;
        }

        // 从 Authorization header 获取 token
        $token = $request->header('Authorization');
        if ($token) {
            $token = str_replace('Bearer ', '', $token);
        }

        if (!$token) {
            return null;
        }

        // 解析 token
        $payload = \app\Util\JwtUtil::decode($token);
        if (!$payload) {
            return null;
        }

        return (int) ($payload['user_id'] ?? null);
    }

    /**
     * 验证认证并返回用户ID，失败则抛出异常
     */
    protected function requireAuth(Request $request): int
    {
        $userId = $this->getUserId($request);
        if (!$userId) {
            throw new \Exception('未登录或登录已过期', 401);
        }
        return $userId;
    }
}