import { Request, Response } from 'express';
import { UserQueryDispatcher } from '../../functions/Users/Queries/UserQueryDispatcher';
import { UserCommandDispatcher } from '../../functions/Users/Commands/UserCommandDispatcher';
import { UserExistsQuery } from '../../functions/Users/Queries/UserQuery';

export async function checkUserExists(
  req: Request, 
  res: Response, 
  queryDispatcher: UserQueryDispatcher, 
  commandDispatcher: UserCommandDispatcher
): Promise<void> {
  try {
    if(!req.user || !req.user.id) {
      res.status(401).json({
        success: false,
        message: 'Unauthorized access - user not authenticated'
      });
      return;
    }
    const id = req.user.id.toString();
    const query = new UserExistsQuery(parseInt(id));
    const exists = await queryDispatcher.dispatch(query);

    res.status(200).json({
      success: true,
      exists
    });
  } catch (error: any) {
    res.status(500).json({
      success: false,
      message: error.message || 'Failed to check user existence'
    });
  }
}