import { ExecutionContext, Injectable, UnauthorizedException } from '@nestjs/common';
import { Reflector } from '@nestjs/core';
import { AuthGuard } from '@nestjs/passport';
import { IS_PUBLIC_KEY } from '../decorators';
import { CacheService } from '../modules/cache/services';

@Injectable()
export class AccessTokenGuard extends AuthGuard('access-token') {
  constructor(protected reflector: Reflector, private readonly cacheService: CacheService) {
    super();
  }
  async canActivate(context: ExecutionContext) {
    const isPublic = this.reflector.getAllAndOverride<boolean>(IS_PUBLIC_KEY, [
      context.getHandler(),
      context.getClass(),
    ]);

    if (isPublic) {
      return true;
    }

    await super.canActivate(context);

    const token = context.switchToHttp().getRequest().headers['authorization']?.split(' ')[1];

    const isRevoked = await this.cacheService.get(token);

    if (isRevoked) {
      throw new UnauthorizedException();
    }

    return true;
  }
}