import { CanActivate, ExecutionContext, Injectable } from '@nestjs/common';
import { Reflector } from '@nestjs/core';
import { AuthGuard } from '@nestjs/passport';
import { Observable } from 'rxjs';

import { IS_PUBLIC_KEY } from '../public.decorator';

@Injectable()
export class JwtAuthGuard extends AuthGuard('jwt') implements CanActivate {
  constructor(private readonly $reflector: Reflector) {
    super();
  }

  public canActivate(
    context: ExecutionContext
  ): boolean | Promise<boolean> | Observable<boolean> {
    const isPublic = this.$reflector.getAllAndOverride<boolean>(IS_PUBLIC_KEY, [
      context.getHandler(),
      context.getClass()
    ]);

    if (isPublic) {
      return true;
    }

    return super.canActivate(context);
  }
}
