import {
  Injectable,
  CanActivate,
  ExecutionContext,
  ForbiddenException,
} from '@nestjs/common';
import { Reflector } from '@nestjs/core';
import { ACCOUNT_TYPES_KEY } from '../decorators/accountType.decorator';
import { AccountType } from '@prisma/client';
import { Request } from 'express';

@Injectable()
export class AccountTypesGuard implements CanActivate {
  constructor(private reflector: Reflector) { }

  canActivate(context: ExecutionContext): boolean {
    const requiredRoles = this.reflector.getAllAndOverride<AccountType[]>(
      ACCOUNT_TYPES_KEY,
      [context.getHandler(), context.getClass()],
    );

    if (!requiredRoles) {
      return true;
    }

    const request = context.switchToHttp().getRequest<Request>();
    const user = request.user;

    if (!user) {
      throw new ForbiddenException('User not authenticated');
    }

    const hasRole = requiredRoles.some(
      (role) => user.role === role,
    );

    if (!hasRole) {
      throw new ForbiddenException('Insufficient permissions');
    }

    return true;
  }
}