import { Injectable, CanActivate, ExecutionContext } from '@nestjs/common';
import { Reflector } from '@nestjs/core';
import { JwtAuthGuard } from './JwtAuthGuard';

@Injectable()
export class GlobalAuthGuard implements CanActivate {
  constructor(
    private reflector: Reflector,
    private jwtAuthGuard: JwtAuthGuard,
  ) {}

  async canActivate(context: ExecutionContext): Promise<boolean> {
    // 检查是否有 @Public() 装饰器
    const isPublic = this.reflector.getAllAndOverride<boolean>('isPublic', [
      context.getHandler(),
      context.getClass(),
    ]);

    if (isPublic) {
      return true;
    }

    // 对于需要认证的接口，使用 JWT 认证
    const result = this.jwtAuthGuard.canActivate(context);
    
    // 处理 Promise 类型
    if (result instanceof Promise) {
      return await result;
    }
    
    return result as boolean;
  }
}